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

type)

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.

dimension.jpg

Part Name Material
Body WCB CF8(304) CF8M(316) CF3M(316L)
Seat 304 304 316 316L
Plug 304 304 316 316L
Gasket PTFE,metal graphite spiral gasket
Bonnet WCB CF8(304) CF8M(316) CF3M(316L)
Packing PTFE,flexible graphite
Packing Gland 304 304 316 316L
  1. Pipe size
  2. Flow rate (min , normal , max )
  3. Medium
  4. Working temperature
  5. Working pressure ?
  6. Power supply
  7. Body material
  8. Other requirement

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