Description
HMT/HDT Pneumatic Three-Way Control Valve
The valve model HMT is a three-way control valve for mixing service.
The actuator employed is of a multi-spring type and has a small-sized, high-output diaphragm motor with an extremely simplified operating mechanism. It is used for the heat control of heat converters, etc.
The valve model HDT is a three-way control valve for diverting service. It has a small-sized, high-output diaphragm motor which is suitable for big port and high differential pressure services.
SPECIFICATIONS
Body type
Three-way cast globe valve
Nominal size
3/4’’, 1’’, 1-1/4’’, 1-1/2’’, 2’’, 2-1/2’’, 3’’, 4’’, 5’’, 6’’, 8’’, 10’’, 12’’, 14’’
Pressure rating
• ANSI Class 125, 150, 300, 600
• 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/T79.1, JB/T79.2
• Welded End: SW, BW
Material
A216 WCB, A216WC6, A352 LCB, A351 CF8, A351 CF8M, A351 CF3M, A351 CF3(see table3-1,3-2)
Bonnet
• Plain bonnet (-17 to 230°C)
• Extension bonnet(-60 to -29 ℃ or over 230°C)
• Bellows Seal
Gland type
Bolted Gland
Packing
V shaped PTFE, PTFE, Flexible graphite
Gasket material
Stainless steel(SUS304, SUS316, SUS316L), copper, aluminum
Valve plug
Three-way, V-port with linear characteristics
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 1/4NPT 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.
