Steel trestle

Structure and working principle all weather breathing valve structure: The valve seat is composed of a rigid framework and a fluorine diaphragm. The rigid framework is stamped from 1Cr18Ni9Ti alloy steel plate in a micro arch shape, and there is an annular groove along the periphery to be sealed by the diaphragm as an air pad. The fluorine diaphragm is tightened on the concave surface of the framework with a metal clamp to form a contact surface with the valve seat. The valve seat is made of polytetrafluoroethylene, its diameter is equivalent to that of the skeleton groove, and the valve port has a large chamfer. The quality of the valve disc is determined according to the design allowable pressure of the oil tank and the diameter of the valve disc. If necessary, it can be adjusted by counterweight principle of all-weather breathing valve: When the valve disc is freely placed on the valve seat, the fluorine diaphragm is slightly concave to the air cushion groove under the gravity of the valve disc. When the pressure difference inside and outside the tank increases, the valve disc rises slightly, and the diaphragm remains well sealed with the valve seat by its own elasticity. Until the whole valve disc jumps away from the valve seat, the diaphragm will rebound and gradually return to its original stateBecause the fluorine diaphragm has good oil resistance and hydrophobic performance, and the contact angle between the diaphragm and the valve seat is large, it is difficult for water vapor to condense and remain at the valve port. At the same time, this contact mode can effectively prevent micro differential pressure leakageDN2532405080100150200250300L240260290290420420535700835950H270290320320470470540620700780

Specification and size of connecting pipe breathing valveDNLH5031035080450500100450500150635600200800700250950820    

Working principle Under the normal working condition of the fire stop breathing valve, the fire stop breathing manhole is basically kept sealed, and the storage tank is under normal pressure. When the normal operation of the breather valve cannot meet the sudden overpressure of the tank due to accidental reasons, the relief gland of the breather manhole will be automatically jacked for emergency pressure relief to keep the pressure in the tank normal; When the pressure in the tank is sharply reduced or ultra vacuum, the suction valve will be opened to suck the atmosphere sharply to maintain the normal pressure in the tank; When there are sparks and flames in the inhaled atmosphere, the fire retardant layer plays a & ldquo; Wall effect & rdquo; To prevent the passage of flame and protect the safety of storage tank   Specification and size   DN H Φ  500 590  760 600 720 880 750 890 955     Performance parameters   Shell material Carbon steel, stainless steel & nbsp   Fire retardant core material Stainless steel anti riot and fire retardant corrugated plate & nbsp   Seal material Oil resistant asbestos, polytetrafluoroethylene & nbsp   Ambient temperature - 300C—& mdash;+ 600C   Operating pressure - 392Pa—& mdash;+ 1961Pa   Anti riot level BS5501：IIA、IIB、IIC

Working principleUnder the normal operation of the fire stop breather valve, the emergency pressure relief manhole is basically sealed, and the storage tank is under normal pressure. When the normal operation of the breather valve can not meet the sudden overpressure of the tank due to accidental reasons, the relief gland of the pressure relief manhole will be automatically pushed open for emergency pressure relief to keep the pressure in the tank normal; When the pressure in the tank is sharply reduced or ultra vacuum, the suction valve will be opened to suck the atmosphere sharply to maintain the normal pressure in the tank; When there are sparks and flames in the inhaled atmosphere, the fire retardant layer plays a & ldquo; Wall effect & rdquo; To prevent the passage of flame and protect the safety of storage tankParameter characteristics  shell material   Carbon steel, stainless steel   seal material   Oil resistant asbestos, polytetrafluoroethylene   ambient temperature  - 300C—& mdash;+ 600C  operating pressure -392pa~ + 1961Pa(-40mmH2O~+200mmH2O

Specification and size of explosion-proof flame retardant breather valveDNLH251602555016025580213260100265290150305330200355350250420400300480510 

Main dimensions of all-weather fire stop breather valve product parameters DNLH shell material carbon steel, aluminum alloy, stainless steel, lining 25160255 flame retardant core material stainless steel explosion-proof flame retardant corrugated plate 50160255 disc seat material aluminum alloy, stainless steel 80213260 seal material NBR PTFE metal gasket 100265290 operating pressure -30mmH2O～+1000mmH2O150305330 connection form flange connection and threaded connection 200355350 flange standard HG GB SH HGJ JB ANSI JIS250420400 manufacturing inspection standard GB5908-86 SY7511-87300480510 Repair and maintenanceIn order to ensure the normal use of lthf-6 all-weather fire stop breathing valve 1. The corrugated flame retardant layer shall be removed and cleaned regularly within 3-6 months to ensure that each hole on the flame retardant layer is unblocked, prevent blockage and ensure safe and normal use2. Regularly check whether the positive and negative valve discs of ventilation are flexible, and whether the contact seal between the guide rod and the valve disc is damaged. If damaged, replace it immediately3. During inspection, maintenance and reinstallation, ensure that all joint surfaces in the valve are closely matched and the valve disc can rise and fall flexibly4. When the new valve is started, remove the shockproof objects between the valve discs before installation, otherwise the breather valve will fail

Specification and size specification drawing No. installation dimension (mm) D1DLHdnDN50LTHF-Y-1Ø 110Ø 140220424Ø 144DN80LTHXF-Y-2Ø 150Ø 150220424Ø 184DN100LTHF-Y-3Ø 170Ø 170500605Ø 184DN150LTHF-Y-4Ø 225Ø 225650705Ø 188DN200LTHF-Y-5Ø 280Ø 280900705Ø 188DN250LTHF-Y-6Ø 335Ø 3351053855Ø 1812Installation and maintenance precautions1. Various safety valves shall be installed vertically2. There shall be no resistance at the outlet of the safety valve to avoid pressure3. The safety valve shall be specially tested before installation and its tightness shall be checked4. The safety valve in use shall be inspected regularlyThere are two common faults: one is valve body damage, corrosion or leakage; Second, since part of the liquid seal oil volatilizes during use, and part of the water vapor, oil vapor and impurities in the tank will condense into it, its quantity, quality and weight may change after long-term use, thus affecting the accuracy of pressure controlStrengthen the inspection of hydraulic safety valve during daily inventory inspection and operation. If it is necessary to check whether the valve body has abnormal changes, whether the valve body has leakage and whether the height of liquid sealing oil meets the regulations, sealing liquid shall be added if necessary; Check whether the hydraulic safety valve operates normally when the oil tank is in and out; Check whether the sealing net is intact and unblockedSelection of hydraulic safety valve1. The type of hydraulic safety valve shall meet the requirements of installation environment and shall be determined according to the application scope of hydraulic safety valve2. The diameter of the hydraulic safety valve shall be compatible with the breathing volume of the oil in and out of the oil tank. Generally, the diameter can be the same as that of the mechanical breathing valve used in the configuration3. The oil filling height in the hydraulic safety valve shall meet the control pressure requirementsManufacturing acceptance standard of the product: according to SY / t0525 1-93。

Structure and working principleBreather valve is an important accessory to protect the safety of oil tank. It is installed on the top plate of oil tank and is composed of pressure valve and vacuum valve. Its function is to maintain the tightness of the oil tank and reduce the evaporation loss of oil to a certain extent. When necessary, it can automatically ventilate, adjust and balance the internal and external pressure of the oil tank, which plays a safe role in the oil tank When the oil and gas pressure in the tank is greater than the allowable pressure of the tank, the oil steam escapes through the pressure valve, and the vacuum valve is closed; When the oil-gas pressure in the tank is less than the allowable vacuum of the tank, fresh air enters the tank through the vacuum valve. At this time, the pressure valve is closed, and the allowable pressure (or vacuum pressure) is controlled by the weight of the regulating disc

Parameter characteristics DN Installation size  (mm) D L 50 Φ50 135 80 Φ80 150 100 Φ100 160 500×700 Without offlet and refer to the picture for the size

Specification and sizeDN L D 50 65 160 80 75 195 100 85 215 150 95 280Manufacturing acceptance standard: as per SY / t0525 4-93。

Manhole sizeDN H  L  500  645  320  600  755  340 750 980 345Manhole installation and maintenanceThe manhole on the tank wall is located at the lower part of the oil tank and bears great liquid pressure. In order to prevent leakage, the installation quality of the manhole must be strictly required. Sealing water lines are processed on flanges and cover plates, which shall be protected during construction to avoid oil leakage during use. Mark the manhole every time it is removed to avoid dislocation during reassembly and affect the tightness. When installing the nuts on the manhole cover plate, apply force evenly diagonally to prevent oil leakage caused by cover plate deformation or uneven force

Schematic diagram of pedal oil measuring holeSpecification and size of pedal oil measuring holeDN L H 100 330 190 150 360 210Note: the specification of DN150 is pedal type & nbsp  DN100 has pedal type and manual rotary typeMaintenance of oil measuring holeThe oil measuring hole is often opened and closed, which is easy to be damaged and air leakage occurs. Therefore, its tightness should be identified regularly. During identification, apply a thin layer of paint on the edge of the hole, gently cover the hole cover, and apply a certain force by hand. If there are obvious and complete marks on the gasket, it can be considered as qualified. If the trace is incomplete, it indicates that the hole cover is not tight, and the washer should be replaced

Maintenance of oil measuring holeThe oil measuring hole is often opened and closed, which is easy to be damaged and air leakage occurs. Therefore, its tightness should be identified regularly. During identification, apply a thin layer of paint on the edge of the hole, gently cover the hole cover, and apply a certain force by hand. If there are obvious and complete marks on the gasket, it can be considered as qualified. If the trace is incomplete, it indicates that the hole cover is not tight, and the washer should be replaced

Specification and sizeDNLH  50  200  186  80  300  220  100  450  283  150  550324  200  600  378  250  660  385

Operation method The environment-friendly oil measuring hole is installed on the top of the storage tank and can be absolutely sealed at ordinary times. When it is necessary to measure chemicals, first unscrew and pull out the seal of the measuring port, put the narrow port measuring assembly in the middle of the upper cover and tighten it, and then press the middle sealing operating handle to open the cylinder seal. At this time, extend the measuring ruler from the narrow port gap above to measure the elevation of the liquid level. After the operation, first pull back the handle, take out the measuring assembly, and then put in the seal and tighten it. When measuring and sampling oil products, pull down the middle operating handle and open the upper cover   Product features The environment-friendly oil measuring hole product has compact structure, safe and convenient operation, adopts double sealing device and has anti-virus function. It can be applied to both chemical tank and oil tank   Product parameters Specification DN Installation size L H D D1 K n L 150 400 650 265 200 225 8 18      

Structure The filter separator is composed of a metal shell with primary filter element (filter coalescence filter element) and secondary filter element (separation filter element) inside, and is equipped with sewage valve, drain valve, differential pressure gauge, safety valve, heat tracing device and other accessories Working principle After the jet fuel enters the filter separator, it is first collected in the aluminum tray and then dispersed into the coalescence filter element from the inside to the outside. In the first step, the solid impurities are filtered by the filter layer, in the second step, the emulsified oil-water is separated through the demulsification layer, and in the third step, the small water droplets are aggregated into large water droplets by the coalescence layer and settled in the water collecting tank; Then, the small water droplets that can coalesce in the future are further separated by the water repellent effect of the separation filter element, settled in the sedimentation tank and discharged by the drainage valve. The clean fuel is collected in the secondary tray through the separation filter element and discharged from the outlet of the filter separator Service life The working state of the filter separator and the working life of the filter element are mainly judged according to the pressure difference. When the inlet and outlet pressure difference reaches 0.1MPa (1.0kg / cm & sup2;), It indicates that the coalescence filter element has been blocked and should be replaced. In addition, when the coalescing filter element is used for more than half a year, it should also be considered to replace it. The separation filter element is a permanent filter element, which can be used for a long time if there is no mechanical damage. However, when replacing the filter coalescence filter element, it should be removed for cleaning and inspection Selection criteria Selection requirements The design pressure of the filter separator must be higher than the actual working pressure The design flow of filtration separation should be greater than 30% - 50% of the actual working flow. The rated flow of the filter cannot be selected according to the rated flow of the pump, because the actual working flow of the pump is likely to be higher than its rated flow The filter separator is divided into three levels: A, B and C; From 30m & sup3 according to flow/ h-500m³/ h； It is divided into 1.0, 1.6, 2.5, 4.0 and 6.4Mpa according to the design pressure; According to the installation form, it is divided into vertical and horizontal; According to the filtering accuracy, it is divided into 3~5μ M and 1 & mu; M (dedicated to filtering suspended solids); There are 170 specifications and models, including no heat tracing device and heat tracing device, according to the use area. The main performance indexes are as follows: As can be seen from the above table, the performance priority is class a > class B > class C, that is, without considering the cost, class a can replace class B and class B can replace class C Product model identification Use and maintenance After the filter separator is installed, it can work continuously and reliably for a long time. Generally, it is not necessary to open the cover for cleaning, but the following points should be paid attention to during normal use: 1) Deflate in time. For the filter installed with manual air release valve, manual air release shall be carried out during each operation, because too much gas in the shell will affect the normal operation of the filter 2) Deposit frequently. After each refueling operation, sediment shall be discharged, and it is normal to have water in the sediment. If solid impurities are found during precipitation, the cause shall be found out and treatment measures shall be taken in time 3) Keep recording the differential pressure. After each operation, the filter differential pressure and fuel throughput shall be recorded in the maintenance log to judge whether the filter separator works normally. If the differential pressure drops suddenly, it shall be stopped immediately, and the cover shall be opened for inspection in time to find out the cause 4) Replace the filter element Replace the coalescence filter element when the following conditions occur: ① The differential pressure reaches 0.1MPa ② The service life exceeds half a year ③ The filter element is damaged (the differential pressure drops suddenly) Replace the separation filter element when the following phenomena occur: ① Damaged filter element ② The filter element fails the water spraying test   Common faults and troubleshooting     Malfunction Possible causes Exclusion method Solid impurities found in precipitation 1. Coalescence filter element is damaged Replace coalescing filter element 2. The filter element fixing nut is not tightened Tighten 3. Incorrect installation Reinstall 4. The primary tray is not fixed properly Fixed The free water content of outlet fuel exceeds the specified index 1. Coalescence filter element is damaged Replace coalescing filter element 2. The separation filter element is damaged Replace coalescing filter element 3. The hydrophobicity of the separation filter element decreases Replace coalescing filter element 4. The filter element is not installed correctly Reinstall The differential pressure drops suddenly 1. Coalescence filter element is damaged Replace coalescing filter element 2. Coalescing filter element is improperly installed ReinstallMaintenance and application     Maintenance and application   1)Deflate on time 2)get rid of deposit often 3)insist on recording differential pressure 4)change filter elements     Shell type Quantity of coalescence in every filter sepatater Installation dimension(mm) Quality (kg) Reference draw Coalescence filter element Separate filter element Specification(mm) Quantity Specification (mm) Quantity A B C D E F G H I LTGF-60/1.6-100A1 150x500x63 5 150x500 2 250 1310 1583 476 900 500 600 450 20 680 1 LTGF-90/1.6-150A1 150x600x63 7 150x600 3 250 1365 21664 570 1080 600 700 450 20 680 1 LTGF-120/1.6-150A1 150x710x63 7 150x710 3 250 1475 1770 580 1080 600 700 450 20 910 1 LTGF-150/1.6-150A1 150x915x63 8 150x710 4 250 1753 2076 600 1100 680 800 450 20 1200 1 LTGF-180/1.6-150A1 150x1120x63 8 150x915 4 250 1958 2281 600 1100 680 800 450 20 1380 1 LTGF-180/1.6-150A2 150x1120x63 8 150x915 4 1080 390 674 2096 800 2135 940 756 20 1450 2 LTGF-240/1.6-200A1 150x915x63 12 150x710 5 250 1830 2172 820 1220 934 900 500 20 1900 1 LTGF-240/1.6-200A2 150x915x63 12 150x710 5 1060 480 694 2190 900 1980 810 830 20 2080 2 LTGF-300/1.6-200A1 150x1120x63 12 150x915 5 250 2035 2377 820 1220 834 900 500 20 2075 1 LTGF-300/1.6-200A2 150x1120x63 12 150x915 5 1060 480 693 2190 900 2185 940 830 20 2075 2 LTGF-360/1.6-200A1 150x710x63 24 150x1120 5 250 2372 2714 820 1220 834 900 500 20 2281 1 LTGF-360/1.6-200A2 150x710x63 24 150x1120 5 1060 480 699 2190 900 2390 1240 830 20 2281 2 LTGF-420/1.6-250A1 150x1120x63 17 150x915 7 250 2035 2500 820 1400 1034 1100 500 20 2350 1 LTGF-420/1.6-250A2 150x1120x63 17 150x915 7 1000 600 699 2290 1100 2150 940 1000 20 2350 2 LTGF-500/1.6-250A1 150x710x63 34 150x1120 7 250 2372 2800 820 1400 1034 1100 500 20 2658 1 LTGF-500/1.6-250A2 150x710x63 34 150x1120 7 1000 600 699 2290 1100 2445 1240 1000 20 2658 2          

Principle pictureWorking principleWhen the product oil flows in from the inlet, the solid impurities are removed through the filter screen placed in the cylinder. When the liquid passes through the filter screen assembly, change the liquid flow direction to make the free gas and some dissolved gas of the oil species fully run out, and the gas rises to the top of the separator to form a gas space and an oil-gas interface. As the gas increases, the pressure increases, the volume increases, and the oil-gas interface decreases. When it decreases to a certain extent, the floating ball device acts, opens the air valve to exhaust the gas, the oil-gas interface rises, the gas space shrinks, and the floating ball device closes the air valve. In this way, the medium flowing through the degassing filter achieves the purpose of separating oil, gas and solidDesign pressure: 0.6MPa ~ 2.5MPa  Model LTXG-40 LTXG-50 LTXG-80 LTXG-100 LTXG-150 LTXG-200 LTXG-250 Nominal diameter D(mm) 40 50 80 100 150 200 250 Flow range （m³/h） 3.2~16 5~25 12~60 20~100 30~130 20~310 30~500 L 300 320 400 500 500~680 820 940 H 432 440 572 617 617~ 1140 1285 1455 h 170 170 180 280 280~380 550 600

Working principleWhen the liquid enters the filter basket through the cylinder, the solid impurity particles are blocked in the filter basket, and the clean fluid is discharged from the filter outlet through the filter basket. When cleaning is needed, unscrew the screw plug at the bottom of the main pipe, drain the fluid, remove the flange cover, and reinstall it after cleaning. Therefore, it is very convenient to use and maintainScope of applicationThe filter produced by our company has the advantages of compact structure, large filtering capacity, small pressure loss, wide application range, convenient maintenance and low price. Its main applicable materials are:1. Weakly corrosive materials in chemical and petrochemical production, such as water, oil products, ammonia, hydrocarbons, etc2. Corrosive materials in chemical production, such as caustic soda, soda ash, concentrated and dilute sulfuric acid, carbonic acid, aldehyde acid, etc3. Low temperature materials in refrigeration, such as liquid methane, liquid ammonia, liquid oxygen and various refrigerantsLtgs I straight throughTechnical parameters nominal diameter DNDO（mm)L(mm)H1(mm)H2(mm)H(mm) effective filtering area (m < sup > 2 < / sup >) 25892201602604800.0036232892201652704950.00362401142801803005500.00572501142801803005500.00572651403302203506500.00961801683402604007400.015391002194203104708800.0246415027350043062011750.0486620032556053078014950.0785825042666064093018100.12065300478750840120023100.16537Note: the filter flange above DN250 has a rotating arm, the equipment has legs, and the cylindrical top and bottom are heads

Scope of application1. Weakly corrosive materials in chemical and petrochemical production, such as water, oil products, ammonia, hydrocarbons, etc2. Corrosive materials in chemical production, such as caustic soda, soda ash, concentrated and dilute sulfuric acid, carbonic acid, aldehyde acid, etc3. Low temperature materials in refrigeration, such as liquid methane, liquid ammonia, liquid oxygen and various refrigerants4. Materials with hygienic requirements in food and pharmaceutical production, such as beer, beverage, dairy products, syrup, etcThe T-type filter produced by our company is divided into two forms: positive baffle and reverse baffle, which can be customized according to the specific requirements of customers (special pressure and special diameter)  

Scope of use 1. Nominal diameter: dn20mm-dn500mm 2. Nominal pressure: pN0 6Mpa-PN6. 3Mpa； 3. Materials used: HT, 20#, Q235, 18-8, F4, SUS304, SUS316L, etc 4. Design temperature: carbon steel - 20 ℃ - 300 ℃, stainless steel - 190 ℃ - 400 ℃ 5. Applicable materials: water, oil, ammonia, hydrocarbon, alkali, acid, milk, wine, food, medicine, refrigeration, alkane, oxygen, ammonia, etc. the filter equipment lined with PTFE can be applied to almost all corrosive gases and liquids Product features Y-type filter screen adopts stainless steel double-layer screen structure, which is firm and durable. It has the characteristics of advanced structure, small flow resistance and convenient sewage discharge. It can be used for a variety of media such as water, steam, oil, nitric acid, urea and oxidizing media. The mesh number of filter screen shall be set according to the needs of users. Generally, the mesh number of water screen is 18-30, the mesh number of ventilation screen is 40-100, and the mesh number of oil screen is 100-480. The Y-type filter can also be combined with the expansion joint to form a Y-type pull rod expansion filter with adjustable installation length. Filter screen can be made according to user requirements Y-type filter is a necessary filtering equipment for hydraulic control valve and precision mechanical products that are easy to be blocked. It is an indispensable device for the pipeline series conveying medium. It is usually installed at the inlet end of hydraulic control valve, pressure reducing valve, pressure relief valve, constant water level valve and other equipment to eliminate impurities in the medium and prevent particulate impurities from entering the channel and causing blockage, so as to protect the accessories on the equipment pipeline from wear and blockage Technical parameters Ltgy type I filter < TD align = "center" bgcolor = "#ffffff" rowspan = "2" valign = "middle" width = "33%" > nominal diameter dn Overall dimension y Ⅰ L1 H 20 260 140 32 300 195 50 350 195 80 400 295 100 450 350 150 580 428 200 680 520 250 800 670 300 950 750 350 1050 845 400 1250 920   Ltgy II filter   nominal diameter dn Overall dimension y Ⅱ L H 20 370 235 25 370 370 32 390 390 40 390 390 50 420 420 65 450 450 80  

Model meaningNominal pressure: 0.6, 1.0, 1.6, 2.5, 4.0MpaOverall dimension Model and specification Nominal diameter dn L H H1 H2 H4 D1 D2 100LTFW 100 459 508 272 810 100 219 160 150LTFW 150 565 724 404 1150 120 325 260 200LTFW 200 617 793 446 1270 130 377 300 250LTFW 250 860 893 495 1430 130 620 650 300LTFW 300 980 997 563 1600 130 740 800 350LTFW 350 1020 1100 620 1770 130 780 850 400LTFW 400 1100 1200 680 1900 130 860 900 Material and working temperatureThe main structural materials of the filter are carbon steel, low alloy steel or stainless steel, which are represented by codes C, m and s respectively. The working temperatures of filters of various materials are as follows:

Structure and principleJacketed filter is mainly composed of connecting pipe, cylinder, filter basket, flange, flange cover and fasteners. Installed on the pipeline can remove large solid impurities in the fluid, so that the machinery and equipment (including compressors, pumps, etc.) and instruments can work and operate normally, so as to stabilize the process and ensure safe productionWorking principleWhen the liquid enters the filter basket through the cylinder, the solid impurity particles are blocked in the filter basket, and the clean fluid is discharged from the filter outlet through the filter basket. When cleaning is needed, unscrew the screw plug at the bottom of the main pipe, drain the fluid, remove the flange cover, and reinstall it after cleaning. Therefore, it is very convenient to use and maintainScope of applicationThe filter produced by our company has the advantages of compact structure, large filtering capacity, small pressure loss, wide application range, convenient maintenance and low price. Its main applicable materials are: 1. Weakly corrosive materials in chemical and petrochemical production, such as water, oil products, ammonia, hydrocarbons, etc2. Corrosive materials in chemical production, such as caustic soda, soda ash, concentrated and dilute sulfuric acid, carbonic acid, aldehyde acid, etc3. Low temperature materials in refrigeration, such as liquid methane, liquid ammonia, liquid oxygen and various refrigerantsTechnical parametersLT GS - Ⅲ jacketed straight through filter  Nominal diameter DN & nbsp Structure size Plug specification L H H1 Steam pressure Ф DO a b W 25 230 350 180  & le; 1.01Mpa   108 G3/4‘& rsquo; G3/4‘& rsquo;   R3/4‘& rsquo; 32 250 360 180 108 G3/4‘& rsquo; G3/4‘& rsquo; 40 320 430 210 159 G3/4‘& rsquo; G3/4‘& rsquo; 50 320 430 210 159 G3/4‘& rsquo; G3/4‘& rsquo; 65 470 490 250 273 G3/4‘& rsquo; G3/4‘& rsquo; 80 480 530 290 273 G1‘& rsquo; G1‘& rsquo; 100 520 600 345 325 G1‘& rsquo;

Working principleWhen the liquid enters the filter basket through the cylinder, the solid impurity particles are blocked in the filter basket, and the clean fluid is discharged from the filter outlet through the filter basket. When cleaning is needed, unscrew the screw plug at the bottom of the main pipe, drain the fluid, remove the flange cover, and reinstall it after cleaning. Therefore, it is very convenient to use and maintainScope of applicationThe filter produced by our company has the advantages of compact structure, large filtering capacity, small pressure loss, wide application range, convenient maintenance and low price. Its main applicable materials are:1. Weakly corrosive materials in chemical and petrochemical production, such as water, oil products, ammonia, hydrocarbons, etc2. Corrosive materials in chemical production, such as caustic soda, soda ash, concentrated and dilute sulfuric acid, carbonic acid, aldehyde acid, etc3. Low temperature materials in refrigeration, such as liquid methane, liquid ammonia, liquid oxygen and various refrigerantsTechnical parametersLT GS Ⅱ high in low out type LT GS Ⅱ high inlet and low outlet type DN50 ~ dn250mmLT GS Ⅱ high inlet and low outlet type DN300 ~ DN500 mm  Nominal diameter dn Structure size Pipe plug H3 H1 H2 L Ф DO W 40 340 120 100 280 133 　ZG3/4‘& lsquo;  50 340 120 100 280 133 65 400 160 110 330 133 80 460 180 140 340 219 100 550 220 170 400 219 125 630 310 190 480 273 150 720 310 220 500 273 200 900 390 280 560 325 250 1070 480 320 660 426 300 1300

Scope of applicationIt is suitable for liquid fire with flash point higher than 60 ℃ in petrochemical industry and protective cooling of class A, B and C liquid and flammable gas storage devicesModel descriptionSchematic diagram of dome roof tank sprinkler < img alt="" src="/Public/userfiles/images/59b.jpg" style="width: 600px; height: 389px;" />  1. The rated working pressure of the nozzle is 0.35Mpa, the water supply intensity is 9 ~ 11L / min. ㎡, and the water supply flow rate is 2 ~ 3m / S2. A filter with 50 holes shall be set in front of the water supply valve3. Flat welding plate flange connection is adopted between pipelines4. Users can determine the nozzle parameters, water supply intensity, number of water supply routes and number of ring pipe layers according to the actual situation. Our company can design separately for customersOrder need to know1. Select the product model corresponding to the storage tank2. The ordering unit shall provide the manufacturer with the installation orientation diagram of tank spray system3. The ordering unit shall provide the manufacturer with the flow, pressure, spraying angle, corresponding pipeline pressure, fire pump parameters and other data required by the nozzle4. The ordering unit shall provide the manufacturer with the orientation diagram of tank winding ladder

Scope of applicationIt is suitable for liquid fire with flash point higher than 60 ℃ in petrochemical industry and protective cooling of class A, B and C liquid and flammable gas storage devicesModel description  Schematic diagram of floating roof tank sprinkler1. The rated working pressure of the nozzle is 0.35Mpa, the water supply intensity is 9 ~ 11L / min. ㎡, and the water supply flow rate is 2 ~ 3m / S2. A filter with 50 holes shall be set in front of the water supply valve3. Flat welding plate flange connection is adopted between pipelines4. Users can determine the nozzle parameters, water supply intensity, number of water supply routes and number of ring pipe layers according to the actual situation. Our company can design separately for customersOrder need to know1. Select the product model corresponding to the storage tank2. The ordering unit shall provide the manufacturer with the installation orientation diagram of tank spray system3. The ordering unit shall provide the manufacturer with the flow, pressure, spraying angle, corresponding pipeline pressure, fire pump parameters and other data required by the nozzle4. The ordering unit shall provide the manufacturer with the orientation diagram of tank winding ladder Floating roof tank sprinkler | fixed fire cooling sprinkler | tank spray cooling fire protection device

Scope of applicationIt is suitable for liquid fire with flash point higher than 60 ℃ in petrochemical industry and protective cooling of class A, B and C liquid and flammable gas storage devicesModel description  Schematic diagram of spherical tank sprinkler & nbsp  1、  The rated working pressure of the nozzle is 0.35Mpa, the water supply intensity is 9 ~ 11L / min. ㎡, and the water supply flow rate is 2 ~ 3m / S2、  A filter with 50 holes shall be set in front of the water supply valve3、  Flat welding plate flange connection is adopted between pipelines4、  Users can determine the nozzle parameters, water supply intensity, number of water supply routes and number of ring pipe layers according to the actual situation. Our company can design separately for customersOrder need to know1. Select the product model corresponding to the storage tank2. The ordering unit shall provide the manufacturer with the installation orientation diagram of tank spray system3. The ordering unit shall provide the manufacturer with the flow, pressure, injection angle, corresponding pipeline pressure, fire pump parameters and other data required by the nozzle4. The ordering unit shall provide the manufacturer with the orientation diagram of tank winding ladder 

Model descriptionTechnical parameters of water curtain nozzleModel flow （L/min）Sprinkler angle（ °）Nozzle threadRP（in）Overall dimensionD & times;  L（mm）MaterialsLTPZ-M-15-12015± 2 901201601801/226× 42 aluminum alloy stainless steelCopper chromium platingLTPZ-M-22-12022± 2LTPZ-M-30-12030± 2LTPZ-M-40-12040± 3  3/428× 42LTPZ-M-50-12050± 3LTPZ-M-63-12063± 430× 42LTPZ-M-80-12080± 432× 42LTPZ-M-100-120100± 635× 45 Note: 1. The working pressure is 0.35Mpa2. If the nozzle required by the demander is different from the above parameters, we can also design and produce it

Model descriptionTechnical parameters of water mist nozzleModel flow （L/min）Atomization angle（ °）Nozzle threadRP（in）Overall dimensionD×  L（mm）MaterialLTPZ-W-15-9015± 2901201/245× 65LTPZ-W-22-9022± 250× 68LTPZ-W-30-9030± 23/455× 68LTPZ-W-40-12040± 3LTPZ-W-50-12050± 360× 68LTPZ-W-63-12063± 4 stainless steelCopper chromium platingLTPZ-W-80-12080± 43/4、165× 70LTPZ-W-100-120100± 675× 75LTPZ-W-125-120125± 1090× 75LTPZ-W-160-120160± 12Note: 1. The working pressure is 0.35Mpa2. If the nozzle required by the demander is different from the above parameters, we can also design and produce it

Product modelProduct model: ltfq-200Main performance indexes and materialsNominal diameter: DN200 Operating temperature: - 25-90 ℃ Working pressure: 0.6MPa Flange standard: hg20616 DN200 pN2 0 RFMain structure and material1 main structure It is mainly composed of valve body, floating ball, seal and sealing flange cover. The valve body is provided with a connecting flange which is connected with the flange of the drainage pipe2. Material: cast steel for valve body, 304 stainless steel hollow ball for floating ball, and nitrile rubber for valve seat sealing materialProduct structure dimension table model specification installation dimension weight （Kg）D1D2D3D4HhMnDLTFQ-80DN8015080160200180894-M1641816LTFQ-100DN1001721001802202001164-M1681820LTFQ-150DN1502301502402852401758-M1681845LTFQ-200DN2002902002953403002478-M1681865LTFQ-250DN25045025035540540036012-M16121875Product installationThe product is installed in the water collecting tank of the outer floating roof tank, and the flange end is connected with the central drainage pipe. The installation direction is with the valve port facing upward. See the product structure drawingAfter the product is installed, the floating ball package in the valve cavity shall be taken out from the valve cavityProduct quality acceptance standard: floating ball check valve for floating roof oil tank (Q / HL t 02-2009)

Model descriptionTechnical description1. Working principle: when the accumulated water exceeds the net cover, the water will be injected into the emergency drainage pipe, the float will be overturned by the impact of water, and the device will enter the drainage state2. Installation: the upper limit of double plate floating roof oil tank shall be taken. The upper limit shall be taken for single plate floating roof oil tank, large volume oil tank or areas with large rainfall, otherwise the lower limit shall be taken. The general requirements are as follows: the lower edge of the single disc floating roof shield shall be 250mm away from the liquid level in the oil tank. The height of the double disk floating roof from the upper surface of the floating roof to the lower edge of the filter cover is generally 120mm. The installation position can be at any barrier free part on the floating roof3. During installation, the water seal groove shall be removed and sent into the tank through the manhole. The drainage pipe shall be inserted and installed from the top of the floating ship, and then welded and assembled together The design of emergency drainage device shall be calculated according to the local maximum rainfall and the load capacity of the floating roof when the central drainage pipe is completely blocked, and the selection quantity shall be determined. The recommended quantities are as follows: tank capacity ( m³/ Set) 5000～1000020000～3000050000100000 selected quantity 1～21～23～44～6  model specification L(mm) Design displacement （m³/h） weight (kg) single disc dual disk single disc dual disk LTPS-200DN2001700200040～50230242MaintenanceCheck the filter screen regularly to prevent the emergency drainage device from working normally due to blockage. After the oil tank is put into operation (including each tank cleaning), water shall be added to the unit at least 100 liters at a time. The overhaul period of the unit shall not be less than 10 years, which can be synchronized with the overhaul of the oil tank

Model descriptionPrincipleThe automatic vent valve is mainly composed of valve body, valve cover and strut. The valve body is welded with the floating plate, and the strut is welded with the valve cover. The strut supports the valve cover on the upper part of the valve body through the positioning valve sleeve in the valve body. It is open during installation, that is, the distance between the top plate of the valve cover and the sealing ring of the valve body is about 150mm. When the floating plate rises, the valve cover automatically falls down and is sealed with the sealing ring of the valve body. When the floating tray runs to the bottom of the floating tray, its strut contacts the tank bottom first and the valve cover is automatically pushed open. Therefore, overpressure or vacuum in the floating plate can be effectively avoided. The valve body adopts a copper lined ring as the sealing port, the soft copper compound hinge wire between the valve cover and the valve body is used as the static conducting wire, and the copper pipe is used as the lining pipe inside the valve body and the valve sleeve to conduct lightning and static electricity, so as to ensure the safe operation of the floating plate and ensure productionMaintenance1. Regularly check whether the static conducting wire between the valve body and the valve cover is firm and reliable. If it is loose, tighten it in time and retest the resistance. The resistance shall be less than 10 & omega2. Check the sealing gasket in the valve cover regularly, and replace it in time if it is damaged

Technology index Suitable tank: floating cover tank Suitable medium: all mediums Sampling precision:   total difference is less than 1.5 % Maximum journey: 21.8 meters Suitable temperature: -40° C~95° C(inside tank) Working life: 6 years

Technology index Suitable tank:   vault tank Suitable medium: all mediums Sampling precision: the difference should be less than 1.5% Maximum journey: 31 meters Suitable temperature: -40° C~95° C(inside tank) Working life: 8 years

Technology qualification Suitable tank:  vault tank Suitable medium: all mediums Sampling precision:   the total difference is less than 1.5 % Maximum journey: 40 meter Suitable temperature: -40° C~95° C(inside tank) Working life: 10 years

Technology index Suitable tank:   floating cover tank Suitable medium: all mediums Sampling precision: the total difference is less than 1.5 % Minimum sampling: 2 meters Suitable temperature: -40° C~95° C(inside tank) Working life: 8 years