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Multistage disk stack control valve

          Multistage disk stack control valve is usually used as a minimum flow valve or a boiler feed pump recirculation control valve, it is widely used in thermal power plant , onshore oilfield pipeline, offshore platform pipeline and other severe working condition for controlling fluid. It is the key safety equipment in the pipeline recirculation system. This valve designed by team of seafly with a kind of multistage disk structure which can easily come true elimination of erosion, noise and pipe vibration.

          Multistage disk stack control valve is a kind of severe service control valve which provided by seafly is especially designed for severe service application working conditions and control a wide variety of relatively clean liquids and gases at high pressure differentials.

         Typical application include power plant boiler feed pump recirculation valve, oilfield severe control valve, power plant boiler feed pump minimum flow valve, Oil and gas compressor recirculation anti-kicking anti-impact, Minimum flow and recirculation of oil and gas compressor recirculation pump, Drain to drain funnel, Generator decompression, Atmospheric heavy oil vacuum distillation, Ethylene decompression, etc.

         We seafly disk stack control valve are improved from the international brand such as Emerson fisher, CCI, Copes etc.

         All disk stack control valve from seafly century limited can be designed as customer’s requirements which can meet general service, heavy duty and severe service working conditions.

        The actuator can be chosen with Diaphragm actuator, piston actuator or electric actuator.


Features & Benefits

●Disk stack designed as circulatory convection multistage pressure reducing principle

 avoid cavitation effectively, extend its service life significantly.

●Modular design and all the internal parts can be replaced and changed quickly, installation and maintenance are very convenient

●Stem packing adopt garlock high temperature sealing packing, no leakage, no need to be

replaced frequently

●Valve plug and cage have good block resistance property, A small amount of impurity will not easy to cause blockage during frequent operation.

●Low noise, good ability of abrasion resistance

●Zero leakage, long operating life, Cost effective

●Elimination of erosion, noise and pipe vibration

●Improved plant performance, reduced leakage costs, safer plant operating conditions



Technical Parameters

●Design standard:    ASME B16.34,China JB/T3595,MSS SP61, ASME B16.5

●Nominal size:        3/4”,1”,1-1/2”,2”,2-1/2”,3”,4”,6” 8” 10” 12”

●Pressure Ratings:  Class 150, 300lb, 600lb, 900lb, class1500lb,2500lb, Class4500

●Optional flow characteristics : 

   Equal percent or linear flow

●ANSI leakage class shutoff: standard Ⅴ,optional Ⅵ

●End connection type: RF-raised face flange,RTJ-ring type joint flange, BW-Butt Weld, SW-socket welding

●Optional material:

 Body &Bonnet-WCB, A105, F22, 12CRMOV (carbon steel or alloy steel)

Stem-410SS, STELLITE, 17-4PH

●Body outline shape:Inline type, angle type  

●Operating temperature:-29℃-+425℃

●Power source:Electric actuator(380V three-phase,220V single phase)

                Pneumatic Diaphragm(0.4-0.7 Mpa)(direct action or reverse action)

●Control signal:switching value control,40-20 mA DC analog control

●Customizable requirements according to customer        




●Feed pump system in power plant, boiler feed pump recirculation valve,

●Onshore oilfield pipeline control valve, Oil gas wellhead chokes

●Offshore platform pipeline control valve, Overboard dump

●Other severe working condition of oil and gas industry

●Nuclear power station, thermal power plant, Compressor recirculation valve

●Fossil fuel, Pulp and paper industry

●Separator level control, Compressor recycle, gas to flare, methanol injection

●water gas injection, injection pump recycle, gas export pressure control

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