[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.
[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.
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