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Electric and Pneumatic
- Safer Bonnet / Valve Body Connection– Unique design provides additional protection if disassembly of bonnet/valve body connection is inadvertently started while there is still pressure in the valve body. Pins mounted in the valve bonnet help ensure the bonnet disengages from the valve body as the hammer nut is removed, while the threads are still engaged.
- Heavy-Duty Guiding–Massive guiding (figures 1 and 2) positively aligns the valve plug in the seat ring for reliable service. The screwed-in seat ring completely encloses the seat ring gasket.
- Live-loaded Packing System–The packing system provides an improved stem seal to help prevent the loss of valuable or hazardous process fluids or gases. It features Fisher ENVIRO-SEALt packing technology to provide reduced packing maintenance.
Electric and Pneumatic
- NACE Constructions–NACE compatible trim is available with the D4 control valve. These constructions meet the metallurgical requirements of NACE MR0175 / ISO 15156.
- Quick-Change Valve Plug–Removable groove pin allows quick, easy valve plug replacement.
- Severe Service Capability with Tungsten Carbide Trim–D4 valves are available with tungsten carbide trim for erosive service. This trim is designed specifically for severe service applications in the oil and gas industry. Durable tungsten carbide trim may benefit your application by wearing better and lasting longer.
- Easy Installation–Compact design allows installation where space is a premium. Screwed valve bodies feature compact face-to-face dimensions while flanged valve bodies conform to ISA-75 standards for maximum versatility.
- Easy Maintenance–Hammer nut bonnet/body joint allows repair or maintenance with a minimum of tools, without removing the valve body from the piping system. Seat ring can be removed with the same service tools used with a Fisher D valve.
- Integral Bonnet Flange– Bonnet has an integral flange that accepts hammer nut force when making the bonnet-to-body connection. There are no snap rings subject to possible failure in sour service or in atmospheric corrosion.
- Standard Trim for Throttling or On-Off Service– Micro-Form trim is standard for throttling or on-off service at no extra cost.
- Application Flexibility–Choices of port diameters up to 31.8 mm (1.25 inches), end connections, and trim materials suit these valves to many applications, including sour service.
Electric
- Low Power Consumption-- The Fisher easy-Drive electric actuator operates with 12 or 24VDC and less than 0.1 watt hours per operation, using Modbus, 4-20 mA, 1-5VDC, or dry contact control signals.
- Low Temperature-- The easy-Drive electric actuator design allow use in ambient temperatures as low as -20°C (-4°F) without use of a heater.
- Easy Installation--The compact design allows installation where space is a premium. Fisher easy-Drive calibrates by simply opening and closing the valve.
- Remote Monitoring and Configuration-- Loss of signal position is programmable over Modbus.
Pneumatic
- Low Temperature Materials--Valve construction materials allow use in applications as low as -40°C (-40°F) for the pneumatic actuator.
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