The most critical application in a Power Station is theBoiler Feed Pump Minimum Flow Recirculation Service. A pumpshould have a minimum Flow through it to take care of the coolingrequirements of the Pump. The purpose of this control valve isto maintain a minimum flow through the pump by diverting back tothe deaerator. This valve prevents damage to the feedpump thatoccurs at low flow.

The parameters are obviously very detrimental for anyvalve to handle. The valve has to drop a pressure of 220-250 bar to10 bar(Deaerator pressure). Also it may be noted that the outletconditions of the valve are near saturation, and hece the valve isvery susceptible to high energy Cavitaion andFlashing.

Minimum flow control valve of the recyclingsystem of feed water pump of boiler in power plant

The valve applys to the severe fluid condition ofhigh-preesure-drops between inlet and outlet side on thepipeline.

Type: straightway(globe)

Connection type: RF & RTJ  ANSI B16.5

                                      BW       ANSI B16.25

Size:3/4"~4"

PN:15~~42Mpa

Pressure Rating: CLASS 900LB~2500LB

Body materials: ASTM A105, A182 F22, F304.F316, F304L,F316L. Monel titanium alloy etc. or depend oncustomer''s special requests.

inner materials: ASTM A276 431, ASTM A276 420,440C, 630 Stainless steel, 316,316L overlaying welding Stellitealloy.

Valve designed on modular assemblyprinciple

Circulatory flow impact structure and the pressure to bereduced step by step. 

With our special technology, we offer a level ofexpertise that is excellent in providing innovative solutions tothe most challenging flow control application in critical workingcondition.

   The circumfluent right-washing type

  Internal bodystructure

Boiler feed pump stystem

Leakage-free pressure-balanced design

Low sound level, Easy assembly

Designed for preciaion flow control with high pressure,high temperature and aggressive fluids

Other shapes such as single-seat, minitypedisc/plug can be available.

Actuator offered by manufacturer or according tothe customer''s requests.

It''s unique structure makes it have first-classthrottling performance and long service life at the same time,overcoming both the cavitation erosion and the flow characteristicdistortion, which conventional high-pressure-difference controlvalves can''t avoid.

 Main parts materials

PS: When ordering, please specify nominal pressure, borediameter, working pressure and temperature, max flow, max designpressure differential, medium, type of actuator and connectionstandard etc.