Back To Top
Fisher™ enhanced ENVIRO-SEAL™ Control Valve Packing Systems
Fisher™ enhanced ENVIRO-SEAL live-loaded packing systems offer stem sealing capabilities and include ENVIRO-SEAL, ENVIRO-SEAL IS (ISO-Seal), and ENVIRO-SEAL HS (HIGH-SEAL).
These systems easily install in your existing valves or can be purchased with new valves. ENVIRO-SEAL packing systems help seal your process to conserve valuable process fluid and protect the environment against the emission of hazardous or polluting fluids to avoid regulatory fines and help keep personnel safe. The long life and reliability of these systems also reduce your maintenance costs and downtime.

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

Play Video

Fugitive Emissions Reduction With Fisher™ ENVIRO-SEAL™ Control Valve Packing Systems

Play Video
Fisher™ enhanced ENVIRO-SEAL™ Control Valve Packing Systems


PTFE, Graphite ULF, Duplex
Valve Stem Diameters
9.5 through 127 mm (3/8 through 5 inch)
Pressure Class
CL125 through CL2500
ISO 15848-1, ANSI/FCI 91-1,API
Process Temperature Range
Refer to the Bulletins and Selection Guidelines under Documents & Drawings


  • Reduce your Carbon Footprint
  • Compliance with the U.S. Clean Air Act—The sealing capability of Fisher enhanced ENVIRO-SEAL packing systems can control emissions to below 100 ppmv (EPA maximum), 50 ppmv, or as low as 1 ppmv. The packing systems provide a shaft seal to prevent the loss of process fluid.
  • Improved Service Life—Fisher™ enhanced ENVIRO-SEAL packing systems, coupled with a very smooth stem surface and live-loading, give you long service life with very low maintenance. The live-loading provides a constant load over the life of the packing material. This greatly reduces or, in many applications, helps to eliminate your need for packing box adjustment and maintenance. The installed packing system provides 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.
  • Enhanced ENVIRO-SEAL systems are available on current Fisher rotary and sliding-stem control valves and are applicable to all industries.


Interested in attending a training class?

Visit our Education Course Listing.