Overview of SZXP Pneumatic Thin Film Direct Single Seat Regulating Valve:
The SZXP pneumatic thin film straight through single seat regulating valve adopts a top guide structure and is equipped with a multi spring actuator. It has the advantages of compact structure, light weight, sensitive action, S-shaped filling channel, low pressure drop loss, large valve capacity, precise flow characteristics, and easy disassembly and assembly. Widely used for precise control of gas, liquid and other media, process parameters such as pressure, flow rate, temperature, and liquid level are maintained at given values. Especially suitable for working environments where the pressure difference between the front and rear of the valve is not large and the leakage is allowed to be small.
There are various types of pneumatic thin film straight through single seat regulating valve products, including standard type, regulating cut-off type, corrugated pipe sealing type, jacket insulation type, etc. The nominal pressure rating of the product includes PN10, 16, 40, and 64; The valve body diameter range is DN20~200. Suitable for fluid temperatures ranging from -200 ℃ to 560 ℃ in various grades. The leakage standard has IV or VI level. The flow characteristics are linear or equal percentage. A variety of varieties and specifications are available for selection.
SZXP Pneumatic Thin Film Direct Single Seat Regulating Valve Main Component Materials
Valve body and valve cover: HT200,ZG230-450,ZG1Cr18Ni9Ti
Valve core and seat: 1Cr18Ni9Ti, welded with Stellite alloy
Soft seal valve core: reinforced polytetrafluoroethylene
Packing: polytetrafluoroethylene, flexible graphite
Bellows: 1Cr18Ni9Ti
Gasket: Rubber asbestos board, 10, 1Cr18Ni9Ti, asbestos wrapped gasket
Membrane cover: A3
Ripple film: Nitrile rubber clip reinforced polyester fabric
Valve stem and push rod: 2Cr13, 1Cr18Ni9Ti
Lining: 2Cr13
Main technical parameters of SZXP pneumatic thin film straight through single seat regulating valve
Nominal diameter DN (mm) |
20 |
25 |
32 |
40 |
50 |
65 |
80 |
100 |
125 |
150 |
200 |
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(10) |
(12) |
(15) |
(20) |
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Rated flow coefficient KV |
straight line |
1.8 |
2.8 |
4.4 |
6.9 |
11 |
17.6 |
27.5 |
44 |
69 |
110 |
176 |
275 |
440 |
690 |
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Equal percentage |
1.6 |
2.5 |
4.0 |
6.3 |
10 |
16 |
25 |
40 |
63 |
100 |
160 |
250 |
400 |
630 |
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Rated travel L (mm) |
16 |
25 |
40 |
60 |
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Effective area of membrane Ae (cm2) |
280 |
400 |
600 |
1000 |
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Signal range Pr (KPa) |
20~100, 40~200 |
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Gas source pressure Ps (MPa) |
0.14~0.4 |
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Inherent flow characteristics |
Straight line, equal percentage |
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Inherent adjustable ratio |
50 |
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Allowable leakage amount |
Hard seat: Class IV (rated capacity of 10-4 valves) Soft seat: Class VI |
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Nominal pressure PN (MPa) |
1.0, 1.6, 4.0, 6.4 |
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Working temperature t (℃) |
Normal temperature type |
-20-200- 40-240- 60~250 |
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Heat dissipation type |
-40-450- 60~450 |
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High temperature type |
450~560 |
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Low temperature type |
-60~-100, -100~-200, -200~-250 |