Fisher r D4 Control Valve Assembly0 pages

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D4 Valve

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D103039X012

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Product Bulletin

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51.2:D4

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January 2013

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Fisher® D4 Control Valve Assembly

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The Fisher D4 control valve is a compact, rugged globe

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valve designed primarily for high-pressure throttling

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applications using either pneumatic or electric control.

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This valve is ideal for use on pressure and flow control

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applications within the oil and gas production industry.

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The D4 is an excellent control valve for high-pressure

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separators, scrubbers, and other processing

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equipment. These valves are especially useful for

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either throttling or on/off control of liquids or gases

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which are gritty, sticky, or which have a tendency to

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build up on internal valve parts.

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If the control valve requires maintenance, the trim and

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packing can be maintained by removing the deep-bore

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hammer nut and lifting the actuator/bonnet assembly

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off the valve without disassembling the actuator.

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Features

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Electric and Pneumatic

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■ Safer Bonnet / Valve Body Connection— Unique

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design provides additional protection if disassembly

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of bonnet/valve body connection is inadvertently

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started while there is still pressure in the valve body.

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Pins mounted in the valve bonnet help ensure the

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bonnet disengages from the valve body as the

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hammer nut is removed, while the threads are still

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engaged.

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■ Heavy-Duty Guiding—Massive guiding (figures 1 and

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2) positively aligns the valve plug in the seat ring for

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reliable service. The screwed-in seat ring completely

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encloses the seat ring gasket.

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■ Live-loaded Packing System—The packing system

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provides an improved stem seal to help prevent the

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loss of valuable or hazardous process fluids or gases.

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It features Fisher ENVIRO-SEAL™ packing

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technology to provide reduced packing

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maintenance.

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W9933-1

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FISHER D4 CONTROL VALVE WITH easy-Drive™ ELECTRIC

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ACTUATOR (NPS 2 RF FLANGED END CONNECTION)

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FISHER D4 CONTROL VALVE

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(NPS 2 NPT END CONNECTION)

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FISHER

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www.Fisher.com

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EMERSON

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Process Management

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