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Pneumatic high temperature control valve product description
ZJHP/M-GW pneumatic high-temperature control valve consists of a multi-spring pneumatic diaphragm actuator and a low flow resistance high-temperature control valve body. The multi-spring actuator has a low height, light weight, and simple equipment. Pneumatic high-temperature control valve body flow path S streamlined, with a compact structure, light weight, sensitive operation, low pressure drop, valve capacity, precise flow characteristics, easy maintenance, etc., can be used for harsh working conditions. Pneumatic high-temperature control valve is equipped with electro-pneumatic valve positioning or pneumatic valve positioner, which can realize automatic adjustment and control of the fluid medium in the process pipeline. Pneumatic high temperature control valve is widely used in precise control of gas, liquid, steam and other medium process parameters such as pressure, flow, temperature, liquid level and other parameters to maintain the gas at a given value. Pneumatic high temperature control valve is especially suitable for applications that allow small leakage, low differential pressure between the front and rear of the valve, and high temperature.
| 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 | 155 | 250 | 370 | 580 | 900 | 1300 | |
| 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 | |
| Nominal pressure(MPa) | 1.6、2.5、4.0、6.4、10.0、16.0 | |||||||||||||
| Rated route(mm) | 16 | 25 | 40 | 60 | 100 | |||||||||
| Actuator model | ZHA/B-22 | ZHA/B-23 | ZHA/B-34 | ZHA/B-45 | ZHA/B-56 | |||||||||
| Valve cover form | High temperature type(+250～+450℃) | |||||||||||||
| Capping form | Bolt compression type | |||||||||||||
| Seal packing | V type PTFE packing、V type flexible 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 valve core 、sleeve Guided valve core |
| Flow characteristics | Linear, equal percentage |
| valve core material | stainless steel (304、316、316L) |
| Configure Actuator Category |
ZHA/B Multi-spring film actuator | ||||
| Actuator model | ZHA/B-22 | ZHA/B-23 | ZHA/B-34 | ZHA/B-45 | ZHA/B-56 |
| Effective area(cm2) | 350 | 350 | 560 | 900 | 1400 |
| route (mm) | 10、16 | 24 | 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, position valve, route switch, valve positioner, handwheel 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 | |||
