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.