ZWZN Electric Double Seat Globe Control Valve
ZWZN Electric Double Seat globe Control Valve is flanged double seated sliding stem control valve. Two seat rings and the plug with stem is a module accessible through the bonnect opening of the body.
ZWZN Electric Double Seat globe Control Valve
ZWZN Electric Double Seat globe Control Valve is flanged double seated sliding stem control valve . Two seat rings and the plug with stem is a module acessible through the bonnect opening of the body. The standard design combines the benefits of strong guiding with a semi-balanced design. The balancing of forces extends the pressure and size limit for this series of valve considerably beyond that of a single seated design. The design provides heavy duty top and bottom guides allowing higher flow rates and pressure drops. Because of the semi-balanced trim design, the actutor is usually more reasonable size as well.
Valves are available both contoured and v-port plug trim depending from the application, standard is contoured plug.
This series is available with series of reduced Cv trims optionally and the standard seat tightness is class II, optional soft trims can meet to class III, ANSI/FCI 70-2.
The detailed structure is revealed by the type code shown on the valve identification plate.
Technical specifications for ZWZN Electric Double Seat globe Control Valve
Face-to-face length: ANSI/ISA-75.08.01, 03, 05 &
ANSI/ISA-75.08.06 (Long),DIN standard
Body rating: Class 150 to Class 1500
PN 10 to PN 100
Max. pressure differential: acc. to pressure class
Temperature range: -29° to +450 °C (depending on
the body materials and bonnet
Flow direction: indicated by an arrow on the
body (normally flow to open)
Actuator mounting: threaded bonnet with yoke nut
or bolted yoke
Stem connection: clamp with bolts/nuts
Dimensions: see Section 10
Weights: see Section 10
Note that the max. shut-off pressure is based on the
mechanical maximum differential pressure at ambient
temperature. You must always observe the fluid
temperature when deciding on applicable pressure values.
When selecting a valve you must also check the noise level, cavitation intensity, flow velocity, actuator load factor, etc. using Nelprof.
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- Pipe size
- Flow rate (min , normal , max )
- Working temperature
- Working pressure ?
- Power supply
- Body material
- Other requirement