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Pneumatic angle type control valve

6 Jul 2018 13:08:00 source:aen-valve.com browse:4055
  • Introduction
  • Technical Parameters

Pneumatic Membrane Angle Control Valve adopts a top guide structure and is composed of a multi-spring pneumatic diaphragm actuator and an angle valve body. Pneumatic angle control valve has the advantages of compact structure, light weight, sensitive operation, streamlined fluid passage, low pressure drop loss, large valve capacity, accurate flow characteristics, and easy disassembly and assembly. Pneumatic membrane angle 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. Pneumatic high-pressure angle type control valve has the advantages of small size, light weight, top-guide structure of the valve core, simple flow path, low resistance and easy flushing. Pneumatic angle control valves are widely used to accurately control gases, liquids and other media. Process parameters such as pressure, flow, temperature, and liquid level are maintained at given values. Pneumatic angle high pressure control valve is especially suitable for the small leakage of small valve before the valve allows high pressure, low pressure, high viscosity, containing suspended solids and particulate matter adjustment, to avoid coking, clogging, easy self-cleaning and cleaning occasions.

  • valve body Parameters
  • Valve trim parameters
  • Actuator parameters
  • Pneumatic angle type control valve Performance
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)
straight line 6.9 11 17.6 27.5 44 69 100 176 275 440 690 875 1250
Equal
percentage
6.3 10 15 25 40 64 100 160 250 400 630 850 1180
Allowable pressure
difference(MPa)
6.4 6.4 5.0 2.8 1.7 1.7 1.0 6.0 4.8 3.3 1.8 1.5 0.8
Nominal pressure(MPa) 1.6、2.5、4.0、6.4、10.0
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 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
Valve body material Carbon steel(WCB、WCC)、stainless steel(CF8、CF8M、CF3、CF3M、 Biphase stainless steel2520)
Valve core form single seat Plunger type、 sleeve guiding 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-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,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 30:1
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