First, Two-Seat Control Valve - Product Description

Cage-type two-seat control valve is a control of a variety of high temperature, low temperature of the high fluid, pressure balance control valve, valve structure is compact, the valve fluid channel was S fluid line, also has a smooth flow around the sleeve to improve the flow Of the deflector, which is characterized by low pressure drop loss, large flow, adjustable range, high precision flow characteristics, in line with IEC534 standard, good dynamic stability of the control valve, low noise, flash cavitation corrosion is small, suitable for control High temperature differential fluid at various temperatures. Equipped with LHA multi-spring pneumatic film actuator, its compact structure, the output force. Products meet GB / T4213-92.
 

Second, Two-Seat Control Valve - The Main Technical Parameters

Body
 Connection Type: Flange connection: FF, RF, RJ, LG, groove type, embedded 
 Flange Standard: JIS B2201-1984, ANSI B16.5-1981, GB / T9112 ~ 9124-2000 
 Welding Connection: SW engagement welding 
 Materials: Steel (ZG230-450), cast stainless steel (ZG1Cr18Ni9Ti, ZG1Cr18Ni12Mo2Ti, ZG00Cr18Ni12Mo2Ti), titanium and other 
 Valve Cover: Normal type (P): - 17 ~ + 230 ℃ 
 Elongated ⅰ (E1): -45 ~ -17 ℃ + 230 ~ + 566 ℃ 
 Elongated ⅱ type (E2I): - 100 ~ -45 ℃ 
 Elongated ⅱ type (E2W): - 196 ~ -100 ℃ 
 Note: The operating temperature must not exceed a variety of materials The allowable range. 
 Gasket Type: Bolt Compression 
 Filler: V-Teflon Filler, Polytetrafluoroethylene Asbestos Filler, Asbestos Braided Filler, Graphite Packing 
 
  Valve Assembly
 Spool Type: Single Sleeve Piston Spool 
 Flow Characteristics: equal percentage (%) and linearity (L) 
 Form Of A Sleeve: split sleeve 
 Material: Stainless Steel (1Cr18Ni9Ti, 1Cr18Ni12Mo2Ti, 17-4PH, 9Cr18,316L ), Stainless Steel Weld Stellite Alloys, Titanium and Resistance Corrosion Alloys and so on
 

Actuator
 Type: LHA multi-spring film actuator, LVA5 single spring film actuator, LVA6 single acting cylinder piston actuator, LVP double acting cylinder piston actuator 
 Diaphragm material: ethylene propylene rubber clip nylon cloth, nitrile rubber clip nylon cloth 
 Spring Range: 20 ~ 100,80 ~ 240kPa (LHA , LVA5 type), 190 ~ 350,190 ~ 400kPa ( LVA6 type) 
 Supply Pressure: 140 ~ 400kPa (LHA type), 140 ~ 280kPa (LVA5 type) 
 400 - 500kPa (LVA6 type), 300 ~ 500kPa (LVP type) 
 Air Source Interface: Rc1 / 4 " 
 Ambient Temperature: -30 ~ +70 ℃ 
 Valve Action Type: Positive or reaction with the implementation of the valve to achieve the gas-off or gas - open 
 Accessories: Locator, Air Filter Pressure Reducer, Security Valve, Stroke Switch, Valve Position Transmitter, Solenoid Valve, Hand Wheel Institutions, Etc.
 

Performance
 Leakage: Metal Seat: Less than 0.01% of the rated capacity of the valve, ANSI B16.104-1976IV Class 
 Soft Seat: Less than 10-7 of rated capacity of the valve, ANSI B16.104-1976IV Hysteresis 
 : With positioning is: less than 1% of full travel, 
 Without positioner: less than 3% of total travel (LHA1 type less than 5% of total travel) 
 Basic Error: with positioner: less than ± 1% full stroke, 
 Without positioner: Less than ± 5% of full stroke 
 Note: Standard V-type PTFE packing 
 Adjustable range: 50: 1 (0.25≤Cv≤14) or 30: 1 (CV≤0.16)
 

Third, The Main Dimensions