Diaphragm Pneumatic Control Valve, ASTM A216 WCB, 3/4-3 Inch

Body Type
Straight-through, Cast Globe Valve

Nominal Size
3/4 Inch, 1 Inch, 1-1/4 Inch, 1-1/2 Inch, 2 Inch, 2-1/2 Inch, 3 Inch

Pressure Rating
• ANSI Class 125, 150, 300, 600 LB
• JIS 10K, 16K, 20K, 30K, 40K
• PN1.6, 4.0, 6.4, 10.0 Mpa

End Connection
• Flanged End: FF, RF, RJ, LG
According to ANSI B16.5, JIS B2201, JB/T 79.1, JB/T 79.2
• Welded End: SW, BW
• Threaded End: Threaded, RC, NPT

Material
ASTM A216 WCB, ASTM A217 WC6, ASTM A352 LCB, ASTM A351 CF8, ASTM A351 CF8M, ASTM A351 CF3M, ASTM A351 CF3

Bonnet Type
• Plain bonnet (-17 to 230°C)
• Extension bonnet (-45 to -17°C and 230 to 566°C)
• Extension bonnet Cryogenic
Integral cast type (-100 to -45°C)
Welded type (-196 to -100°C)
• Bellows type

Actuator type
Single-acting diaphragm actuator, Spring type piston actuator, Double acting piston actuator

Diaphragm material
Cloth embedded nylon and ethylene propylene rubber

Spring range
• 20 to 100 kPa(0.2 to 1.0 kgf/cm2)
• 40 to 200 kPa(0.4 to 2.0 kgf/cm2)
• 80 to 240 kPa(0.8 to 2.4 kgf/cm2)

Supply Pressure
0.14, 0.25, 0.28, 0.4, 0.5 Mpa

Air connection
Rc1/4 or 1/4 Inch internal thread

Ambient temperature
-30 to 70℃

Valve action
• FO: Air to close(Direct action actuator is combined.)
• FC: Air to open(Reverse action actuator is combined.)

Optional Accessories
• P/P or I/P Positioner
• Air filter regulator
• Top-mounted or Side-mounted Handwheel
• Limit switch
• Solenoid valve
• Motion transmitter
• Booster relay
• Lock-up valve
• Air lock relay
• Others

Flow characteristics
• Linear

Leakage
• Metal Seat
According to IEC 60534-4:2006 Class IV, leakage is less than 0.01% of maximum valve capacity.

Inherent rangeability
• 30:1

Hysteresis error
• Without positioner: Within 3% F.S.
• With positioner: Within 1% F.S.

Linearity
Without positioner: Within ±5% F.S.
With positioner: Within ±1% F.S.