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Pneumatic small flow control valve product description
ZJHY pneumatic small flow control valve is a product developed independently by our company for small flow conditions. It consists of a pneumatic diaphragm actuator and a small flow control valve body. The multi-spring actuator has a low height, light weight, and simple equipment. Pneumatic small flow control valve features small size, light weight, high performance, precise control for small flow rates, etc. When adjusting unclean media, the problem of blocking jams should be taken care of with regard to the problem of small throttling clearance. Pneumatic small flow control valve is particularly suitable for the main flow adjustment of liquids, steam and other media.
| Nominal diameter(DN) | G3/8"、1/2"、G3/4"、G1" | ||||||||||||
| Valve seat diameter(dn) | 1.5 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 15 |
| Rated flow coefficient KV | 0.025 | 0.05 | 0.08 | 0.12 | 0.20 | 0.32 | 0.50 | 0.80 | 1.00 | 1.40 | 1.55 | 1.85 | 2.23 |
| Allowable pressure difference(MPa) |
≤Nominal pressure | ||||||||||||
| Nominal pressure(MPa) | 1.6、2.5、4.0、6.4、10.0、16.0、25.0、32.0 | ||||||||||||
| With actuator type | ZHA/B-11 | ||||||||||||
| Rated route(mm) | 8 | 10 | 12 | ||||||||||
| Valve cover form | standard type(-17～+250℃)、High temperature type(+250～+450℃)、Low temperature type(-40～-196℃)、Bellows sealed type(-40～+350℃) | ||||||||||||
| Capping form | Bolt compression type | ||||||||||||
| Seal packing | V type PTFE packing、V type flexible graphite filler | ||||||||||||
| fValve body material | stainless steel（CF8、CF8M、CF3、CF3M、 Biphase stainless steel2520） | ||||||||||||
| Valve core form | single seat Plunger type |
| 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-11 |
| Effective area(cm2) | 200 |
| route (mm) | 10、16 |
| 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 | |||
