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Product overview
Pneumatic membrane three-way regulating valve is mainly used to divide an inlet fluid into two outlet fluids or to synthesize two inlet fluids into one outlet fluids. Three-way valves are divided into confluence control valves and shunt control valves. Valve size, when the pressure difference is small, the confluence valve can also be used as a diversion valve, but the valve size is large. Do not use shunt valve when pressure difference is high.
Product type
Shunt three-way regulating valve
Confluent three-way regulating valve
Product valve body
Type: Three-way Casting Structure
Nominal Path: DN20-DN200
Nominal Pressure: ANSI150, 300, 600LB JIS10, 16, 20, 30, 40K PN1.6, 2.5, 4.0, 6.4MPa
Connection mode: flange: FF, RF, RJ and LG
Flange standard: ANSI B16.5, JIS B2201 JB/T79.1 PN1.6MPa, JB/T79.2
Thread: DIN, NPT, RC, BSP, G, etc.
Welding: GB12224-89
Sealing surface form: PN16 convex surface, PN40 concave surface
Material: WCB, 304, 316, 316L
Upper cover: Standard type (-20 ~200 ~C) low temperature type (-60 ~196 ~C) heat dissipation type (-40 ~450 ~C)
Bellows sealing type
Cover Form: Plate Form
Filler: V-type fluorotetrafluoroethylene, flexible graphite
Valve components
Core type: single-seat plunger type
Core seat: 304, 316 + STL
Flow Characteristics: Equal Percentage, Linearity, Quick Opening
Executing agency
Form: Multi-spring membrane actuator
Form of action: positive and negative
Diaphragm Material: Polyester Fabric Reinforced by NBR Clip
Spring range: 20-100KPa, 40-200KPa, 80-240KPa.
Supply pressure: 0.14, 0.16, 0.28, 0.40 MPa
Function form
The air-closed FO (positive action actuator) opens vertically when the gas source fails.
Air-Open FC (Pairing Reaction Actuator) When the gas source fails, the horizontal direction is open.
Annex (Configuration as required)
Electrical positioner, air filter pressure relief valve, handwheel mechanism, limit switch, solenoid valve, reserve valve and others
Product performance
Rated KV: Reference Table
Flow characteristics: linear, equal percentage, fast opening
Adjustable range: 30:1
Leakage Class: Metal Seal: Less than 0.01 (ANSI B16.104-1976IV)
Soft seal: less than 0.00001%
Backlash: Less than 1% of total travel (with locator)
Less than 3%-5% of the total trip (without locator)
Basic error: less than (+1%) of the whole journey (with locator)
Less than +5% of the total stroke (without locator)
