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Product overview
Pneumatic film sleeve control valve adopts sleeve-oriented, pressure-balanced double sealing surface and single sealing surface structure. It is a force-balanced control valve with compact body structure and S-streamlined fluid passage. It has the advantages of small pressure drop, large flow, wide adjustable range and high accuracy of flow characteristics. The control valve is equipped with multi-spring film actuator, which has small structure and large output force. It is more suitable for use under fluid control conditions requiring good dynamic stability, low noise, cavitation/flash, high and low temperature and high pressure difference.
Standard technical parameters
Valve body type: single seat, double seat, sleeve pneumatic film sleeve control valve
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, PN63, PN100 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 Form: Pressure Balance Form
Core seat: two-seat plunger type spool, metal seal, equal percentage characteristic, linear characteristic (LC)
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
Air-closed FO (Positive Acting Actuator) When the air source fails, the actuator spring opens the valve.
Air-Open FC (Reaction Actuator) When the air source fails, the actuator spring closes the valve.
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: 50:1
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)
