ENVIRO-SEAL™ Packing Systems for Fisher™ Rotary and Sliding Stem Valves

Name: ENVIRO-SEAL™ Packing Systems for Fisher™ Rotary and Sliding Stem Valves
Brand: Emerson

Fisher ENVIRO-SEAL packing systems offer exceptional shaft sealing capabilities.

These packing systems, available with PTFE or graphite packing material, feature live-loading and unique packing ring arrangements for long-term, consistent sealing performance.

How to Install ENVIRO-SEAL™ Packing Systems in Fisher™ Rotary Valves

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How to Replace Packing in Fisher™ Rotary Valves

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ENVIRO-SEAL™ Packing Systems for Fisher™ Rotary and Sliding Stem Valves

Specs

Please See Product Bulletin

Resources Section

Features

Compliance with the Clean Air Act—The excellent shaft sealing of the ENVIRO-SEAL packing system (figure 1) can control emissions to below the EPA maximum of 100 ppm. ENVIRO-SEAL packing systems provide an excellent shaft seal to prevent the loss of process fluid.
Improved Service Life—ENVIRO-SEAL packing system design, the anti-extrusion rings that contain the packing, and live loading combine to give you long service with very low maintenance. External live-loading provides a constant load over the life of the packing material which reduces your need for constant packing box adjustment and high levels of packing maintenance. Installed ENVIRO-SEAL packing systems provide excellent shaft sealing, guiding, and transmission of loading force.
Easy Installation in Existing Valves—All parts needed to install the systems in existing valves are available in a convenient kit. Some larger valves may require the packing box to be sleeved to accommodate a smaller cross section of packing.
Adaptable to Many Applications— ENVIRO-SEAL packing systems are available with PTFE or graphite packing rings. ENVIRO-SEAL packing systems fit a wide range of Fisher rotary valves. See the valve product bulletin for specific availability information. Note: ENVIRO-SEAL PTFE and graphite packing
Systems can be used in vacuum service applications with packing rings in the standard orientation. It is not necessary to reverse the PTFE packing rings.

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For an excellent shaft seal in applications that are not environmentally-sensitive, ENVIRO-SEAL packing systems may be applied at higher pressure/temperature ratings [103 bar (1500 psig)/-46 to 232C (-50 to 450F) for PTFE design or 207 bar (3000 psig)/-198 to 371C (-325 to 700F) for graphite design]. Such applications offer excellent shaft sealing, extended packing life, and reduced maintenance costs when you compare ENVIRO-SEAL packing systems to standard packing arrangements.

For process control applications requiring compliance with specific environmental protection regulations, the Fisher solution is the unique ENVIRO-SEAL packing system. ENVIRO-SEAL packing systems keep emission concentrations below the 100 ppm (parts per million) requirement set by the Federal Environmental Protection Agency (EPA).