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Pneumatic small flow control valve

6 Jul 2018 12:31:00 browse:10202
  • Introduction
  • Technical Parameters

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.

  • valve body Parameters
  • Valve trim parameters
  • Actuator parameters
  • control valve Performance
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
≤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
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
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
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