Spraywater control valve (reheat, superheat)

Spray/Cooling Water Control Valve 1.Excellent sealing & control characteristic 2.Cavitation&Erosion resistant 3.Multi-stage

Attemperator/Desuperheater Spraywater Control Valve Application in Power Plant.

Operationg Conditions:   The supply water for the spray valves usually comes from the Feedpump discharge. The reheat

pressure is equal to the superheater or reheat pressure plus nozzle back pressure. The superheat

spray valve sees a low DP, ususlly 200 to 300 psi. Turndown and accuracy of positioning is of key

concern. The reheat spray valve is normally a high DP, with cavitation and seat leakage a major

concern.  The major problem exists with reheat spray. High DP causes excessive seat leakage and the valve

normally operates close to the seat. Seat leakage, wire draw and inaccurate control causes a

reduction in steam temperature and efficiency.

The valve applys to the severe fluid condition of high-preesure-drops between inlet and outlet side on the pipeline.

Type: straightway

connection type: RF & RTJ   ASME B16.5

                                     BW         ASME B16.25

                                     SW         ASME B16.11

DN:3/4"~6"

PN:1450PSI~~4640PSI

Pressure: ANSI Class 600lb~~2500lb

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

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

Valve designed on modular assembly principle

Circulatory flow impact structure and the pressure to be reduced step by step. 

With our special technology, we offer a level of expertise that is excellent in providing innovative solutions to the most challenging flow control application in critical working condition.

             

  Internal body structure  

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, minitype disc/plug can be available.

Actuator offered by manufacturer or according to the customer's requests.

It's unique structure makes it have first-class throttling performance and long service life at the same time, overcoming both the cavitation erosion and the flow characteristic distortion, which conventional high-pressure-difference control valves can't avoid.

 Main parts materials

parts	materials	parts	materials
body	ASTM A105, 316 etc.	packing	Flexible graphite
seat ring gasket	Flexible graphite+mesh board	gland	ASTM A182 F316, A276
seat ring	ASTM A279 431	stem	ASTM A182 F316, A276
spiral wound gasket	ASTM A279 431	cover board	ASTM A29 1045
disc	Flexible graphite+316	bonnet	A216 WCB, 316 etc.
Bonnet gasket	Flexible graphite+mesh board	cage gasket	Flexible graphite+mesh board
Main nuts	ASTM A29 1045	Main bolts	ASTM B7

 

PS: When ordering, please specify nominal pressure, bore diameter, working pressure and temperature, max flow, max design pressure differential, medium, type of actuator and connection standard etc.

Spraywater control valve (reheat, superheat)