Pneumatic three-way control valve

[Essential information]       
        Pneumatic diaphragm three way control valve is mainly used to separate an inlet fluid into two outlet fluids or to synthesize two outlet fluids into an outlet fluid. The three-way valve is divided into a combined regulating valve and a shunt regulating valve. Valve size, pressure difference, the confluence valve can also be used as diverter valve, but the valve size. Please don't use diverter valve on high pressure differential.

[Valve structure drawing]


[Body]

Type: Three-way casting structure

Nominal diameter: DN20-DN200

Nominal pressure: ANSI150, 300, 600LB, JIS10, 16, 20, 30, 40K, PN1.6, 2.5, 4, 6.4MPa

Connection: flange: FF, RF, RJ and LG

Flange standards: ANSI, B16.5, JIS, B2201, JB/T79.1, PN1.6MPa, JB/T79.2 thread: DIN, NPT, RC, BSP, G and other welding: GB12224-89

Sealing surface form: PN16 convex, PN40 concave

Material: WCB, 304, 316, 316L

Upper valve cover: standard type (-20 ~ +200 DEG C), low temperature type (-60 to -196 DEG C), heat dissipation type (-40 ~ 450 DEG C)

[Bellows seal type]

Gland type: press plate type

Packing: V PVC, PTFE flexible graphite fluoride

[Valve assembly]

Spool form: single seat plunger type

Spool, valve seat: 304, 316+STL

Flow characteristics: equal percentage, linear, quick opening

[Actuating mechanism]

Form: multi spring film actuator

Action form: positive action and reaction

Diaphragm material: NBR rubber clip to strengthen polyester fabric

Spring range: 20 ~ 100KPa, 40 ~ 200KPa, 80 ~ 240KPa,

Air supply pressure: 0.14, 0.16, 0.28, 0.40MPa

[Action form]

Air operated FO (positive acting mechanism), when the air source fails, the vertical direction is connected

Air operated FC (reaction actuating mechanism), when the gas source fails, the horizontal direction is communicated

Accessories (configured as required)

Electrical positioner, air filter relief valve, hand wheel mechanism, limit switch, solenoid valve, retaining valve and other

[Performance]

Rating KV: refer to table

Flow characteristics: linear, equal percentage, quick opening

Adjustable range: 30:1

Leakage level: metal seal: less than 0.01 (ANSI, B16.104-1976IV)

Soft seal: less than 0.00001%

Backlash: less than full range 1% (with locator)

Less than full stroke 3%-5% (without locator)

Basic error: less than full range + 1% (with locator)

Less than full journey + 5% (without locator)

[Adaptive condition]
      The pneumatic three - way control valve is composed of pneumatic film, multi spring actuating mechanism and three-way valve. With the new ZHA/B multi spring actuator instead of the old ZMA/B actuator, it has the advantages of low height, light weight and easy installation and maintenance. The valve structure of the three-way valve adopts a cylinder thin-wall window and adopts the side direction of the valve core. Used to adjust the proportional control or bypass, adjust the fluid temperature control system is especially suitable for the oil industry in the heat exchanger, a three-way valve can replace two single seat valve or valve seat use, occupy small space, save the installation of pipes and with customers.