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Pneumatic high temperature control valve

6 Jul 2018 11:43:00 source:aen-valve.com browse:3692
  • Introduction
  • Technical Parameters

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.

  • valve body Parameters
  • Valve trim parameters
  • Actuator parameters
  • 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)
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
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