The pneumatic thin-film three-way control valve is mainly used to divide a unit of imported fluid into two or two imported fluids into a single unit of export fluid. Three-way valve is divided into flow regulating valve and shunt regulator. Valve size, differential pressure and flow valve can also be used as a diversion valve, but the valve size is large. Do not use shunt valve on high pressure occasions. 

Class type: 

Shunt three pass regulating valve 

Confluence three-way regulating valve 

The valve body 

Type: three-way casting structure 

Nominal size: DN20-DN200 

Nominal pressure: ANSI150, 300, 600LB    JIS10, 16, 20, 30, 40K    PN1.6, 2.5, 4.0, 6.4 MPa 

Connection mode: flange: FF, RF, RJ and LG 

Flange standard: ANSI B16.5, JIS B2201 

JB/T79.1 PN1.6 MPa, JB/T79.2 

Threads: DIN, NPT, RC, BSP, G, etc. 

Welding: GB12224-89 

Sealing surface: PN16 convex surface, PN40 is concave surface 

Material: WCB, 304, 316, 316L 

On the cover: standard (-20℃~+200℃) 

Low temperature (60℃~196℃) 

Cooling type (to 40℃~450℃) 

Bellows seal type 

Gland form: pressure plate type 

Fillings: v-type fluoroteflon, flexible graphite 

In the valve components 

Valve core form: single cylinder type 

Valve seat: 304, 316 + STL 

Flow characteristics: equal percentage, linear, fast 

Actuator 

Shape: multi-spring film actuator 

Action form: positive action and reaction 

Diaphragm material: reinforced polyester fabric with a rubber sandwich 

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

Supply pressure: 0.14, 0.16, 0.28, 0.40 MPa 

Role form 

Vaporization FO (with positive function actuator) when the gas source failure, the vertical direction is connected. 

Air - open type FC (coordination reaction actuator) when gas source failure, horizontal direction 

Attachment (as required) 

Electric positioner, air filtration reducing valve, handwheel mechanism, limit switch, solenoid valve, safeguard valve and other 

Performance 

Rated KV value: reference table 

Traffic characteristics: linear, equal percentage, fast 

Adjustable range: 30:1 

Leakage level: metal seal: less than 0.01 (ANSI b16.104-1976iv) 

Soft seal: less than 0.00001% 

Return difference: small for full stroke 1 % (with localizer) 

Small in full range 3-5% (no localizer) 

Basic error: less than 1 % (with localizer) 

Less than 5% of all trips (without locators)