Model &Name: P·QSFIII SeriesPneumatic Medium-temperature Medium-Pressure, High-Temperature High-

PressureDrain Valves

Characteristics:Used for the drain system of steam turbinewith horizontal and vertical installation types 

available; Easy and simpleoperation; Light and compactassembly with reliable switching.

NominalDiameter (DN): 20~50mm

NominalPressure (PN): 1.6, 4.0, 6.4, 17, 70MPa

Air SupplyPressure: 0.2~0.7MPa

Allowable PressureDifferential (MPa): PN1.6~6.4: same as PN; PN17: ≤14; PN70: ≤25.

OperationTemperature: Medium-Temperature Medium-Pressure: ≤450℃; High-Temperature High-

Pressure:≤570℃.

Material:Medium-Temperature Medium-Pressure: ZG230-450; High-Temperature High-Pressure:12CrMoV

Connection Type: Medium-TemperatureMedium-Pressure: JB/T79-94; High-Temperature High-Pressure: Grooved 

ButtWelding GB/T12224-2005