Main Feedwater Control Valve

Main feedwater control valve
Technical parameter

Body

Type: Straight globe valve body

End Connection: Raised Face (RF) & Ring Type Joint (RTJ ) according to ANSI B16.5 or other flange connecting type.

Normal Diameter: 1", 1-1/2", 2", 3", 4", 6", 8"

Pressure Rating: ANSI 300LB, 600LB

Body materials: A216 WCB, F11, F22, F304. F316, F304L, F316L, Alloy 20, Monel and Ti, etc. Or other materials provided according to customer's requirement.

Bonnet

Type: Standard/Extended

Materials: Same as Body

Packing: Normal Temp. (-10~200° C): V-Ring PTPE; Above 200° C: Graphited Asbestos Packing, Carbon Fibre Packing, Ring Resilient Graphite Packing.

Trim Assembly

Plug Type: MA Type(Balanced plug)

MB Type(Solid plug)

MC Type(Self-cleaned plug)

Flow Characteristic: Equal Percentage/Linear and Quick Opening

Material: ASTM A276 431, ASTM A276 420, 440C, 630, etc. Stainless Steel. 316, 316L with Stellite, or other materials provided according to customer's requirement.

Flow Direction

MA Type: Side in and bottom out; MB and MC Type: Bottom in and side out.

Actuator

Select by manufacturer or according to customer's requirement.

Accessory

Select homemade or imported electric/pneumatic valve positioner, pneumatic valve positioner, handwheel, valve position transmitter and air filtrated pressure reductor, etc. According to customer's requirement.

Others

Valve designed on modular assembly principle

Leakage-free pressure-balanced design

Low sound level, Easy assembly

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

Othere shapes such as single-seat, minitype disc/plug can be available.

Acturator offered by manufacturer or according to customer's request.

Main parts materials

Parts
Material
Parts
Material

Body
A216 WCB, 316 etc.
Packing
Flexible graphite

Seat ring gasket
Flexible graphite+mesh board
Gland
ASTM A182 F316, A276

Seat ring
ASTM A276 431
Stem
ASTM A182 F316, A276

Spiral wound gasket
ASTM A276 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

Note: Other materials are available upon request.