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Pneumatic film control valve product description
ZJHP/M Pneumatic Diaphragm Control Valve consists of a multi-spring pneumatic diaphragm actuator and a low flow resistor compact regulator valve body. The multi-spring actuator has a low height, light weight, and simple equipment. Pneumatic diaphragm control valve body flow path S streamlined, with a compact structure, light weight, sensitive operation, low pressure drop, valve capacity, accurate flow characteristics, easy maintenance, etc., can be used for harsh working conditions. Pneumatic membrane control valve is equipped with electro-pneumatic valve positioning or pneumatic valve positioner, which can realize automatic adjustment and control of fluid medium in process pipeline. Fine miniature pneumatic control valves are widely used to accurately control the parameters of the gas, liquid, steam and other media such as pressure, flow, temperature, liquid level and other parameters to maintain the gas at a given value. Fine pneumatic control valves are particularly suitable for applications where small leakages, low pressure differentials between the front and rear of the valve, and certain viscosities and low amounts of fiber media are permitted.
| Nominal diameter(DN) | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | |
| Valve seat diameter(dn) | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | |
| Rated flow coefficient(KV) |
single seat | 6.9 | 11 | 17.6 | 27.5 | 44 | 69 | 110 | 176 | 275 | 440 | 630 | 875 | 1250 |
| sleeve | 6.3 | 10 | 16 | 25 | 40 | 63 | 100 | 160 | 250 | 360 | 570 | 850 | 1180 | |
| Allowable pressure difference(MPa) |
single seat | 3.8 | 3.2 | 3.0 | 2.0 | 1.8 | 1.5 | 1.4 | 1.0 | 0.7 | 0.6 | 0.5 | 0.3 | 0.1 |
| sleeve | 6.4 | 6.4 | 5.2 | 5.2 | 4.6 | 4.6 | 3.7 | 3.7 | 3.5 | 3.1 | 3.1 | 2.6 | 2.2 | |
| Rated route(mm) | 16 | 25 | 40 | 60 | 100 | |||||||||
| With actuator type | ZHA/B-22 | ZHA/B-23 | ZHA/B-34 | ZHA/B-45 | ZHA/B-56 | |||||||||
| valve body form | Straight through ball valve | |||||||||||||
| Nominal pressure | PN1.6、2.5、4.0、6.4、10.0 | |||||||||||||
| Flange standard | GB/T9113、 JB/T79、HG20594 and other standards | |||||||||||||
| Connection Type | Flange (FF RF RTJ), welding (SW BW), thread (for 1" or less) | |||||||||||||
| Valve cover form | Standard type -17 to +250°C, high temperature type +250 to +450°C, low temperature type -60 to -196°C, bellows sealed type -40 to +350°C | |||||||||||||
| Capping type | Bolt compression type | |||||||||||||
| Seal packing | V-type polytetrafluoroethylene filler, impregnated PTFE asbestos filler, asbestos textile filler, graphite filler | |||||||||||||
| Valve body material | Cast Steel (WCB), Stainless Steel (CF8, CF8M, CF3, CF3M), Chrome Molybdenum Steel, Cast Steel Backing PTFE (WCB+F46) | |||||||||||||
| Valve core form | Single seat plunger type spool, sleeve double guide type spool, high pressure cage type spool (high pressure differential type) |
| Flow characteristics | Linear, equal percentage |
| valve core material | stainless steel (304、316、316L) |
| Actuator type | ZHA/B Multi-spring film actuator | ||||
| Actuator model | ZHA/B-22 | ZHA/B-23 | ZHAB-34 | ZHA/B-45 | ZHA/B-56 |
| Effective area(cm2) | 350 | 350 | 560 | 900 | 1400 |
| route (mm) | 10、16 | 25 | 40 | 40、60 | 100 |
| Spring range(KPa) | 20～100（standard）、20～60、60～100、40～200、80～240 | ||||
| Diaphragm material | Nitrile rubber clip nylon cloth, ethylene propylene rubber clip nylon cloth | ||||
| Air supply pressure | 140～400KPa | ||||
| Air interface | RC1/4" | ||||
| Ambient temperature | -30～+70℃ | ||||
| equipped with accessories | Locator, air filter pressure reducer, retention valve, hand wheel mechanism, etc. | ||||
| Form of action | Air-to-close (B)—Valve open (FO) when deaeration; Air-opening (K)—Valve off (FC) when deaeration | ||||
| Item | Without positioner | With positioner | ||
| Basic error % | ±5.0 | ±1.0 | ||
| Backlash % | ≤3.0 | ≤1.0 | ||
| dead zone % | ≤3.0 | ≤0.4 | ||
| Starting to end point deviation % |
Air open | Starting point | ±2.5 | ±1.0 |
| Starting point | ±5.0 | ±1.0 | ||
| Air shut | Starting point | ±5.0 | ±1.0 | |
| end point | ±2.5 | ±1.0 | ||
| Rated route deviation % | ≤2.5 | |||
| Leakage L/h | 0.01%× Valve rated capacity | |||
| Adjustable range R | 50：1 | |||
