Pressure-reducing and desuperheating station combining straight-way pressure let-down with integrated water-spray cooling. Delivers stable, desuperheated steam for downstream process or turbine bypass service.
Enquire About This Product →C-8900 Series PRDS With Straight-Way
C-8900 valve, derived from C-6940 series, is provided with straight-way globe body and cage trim. The pressure reduction is performed through two stages: the first one is intended for flow control (inside the body), while the second one is a fixed throttling section (orifice plate or labyrinth muffler).
The steam coming out from the silencer after valve body enters the desuperheater injection chamber through an annular section where the velocity is kept at a suitable valve to enhance the desuperheating efficiency.
Typical applications: Bypass of medium and low pressure steam turbines with operating temperatures below 540°C, cogeneration power plants, and continuous operation scenarios that require strict closure.
Style Type | C-8900 Series attemperating pressure reducing valves |
Nominal Pipe Size（NPS） | 6”-20” |
Rating | ≤ANSI 1500: 6"-12", ≤ANSI 600: 14"-20" |
Connection | Steam pipe section：Flange type (RF, RTJ)/Buttweld type (BW) Attemperating water section: Flange type（RF,RTJ） Valve ends: Flange type (RF, RTJ), Welded type (SW, BW) |
Body Materials | Carbon steel and Cr-Mo steel (selected according to steam inlet temperature and pressure) |
Trim Materials | Stellite overlay welding or nitrided F6NM, and 17 - 4PH (when the temperature is lower than 350℃) |
Leakage Class | Compliant with IEC 60534-4 -Unbalanced valve plug: Class V -Teflon or pilot-balanced valve plug: Class V -Balanced valve plug with graphite balance seal ring: Class IV S1. When equipped with special pneumatic, electric, or hydraulic actuators, it can achieve Class V. |
Actuator | A-X-290 Pneumatic Diaphragm Actuator， A-X-400 Pneumatic Cylinder Actuator，Electric Actuator |