Data Sheet

www.Fisher.com
Fisher
r
ENVIRO-SEAL
t
and HIGH-SEAL
Packing Systems for Sliding-Stem Valves
(Live-Loaded)
Fisher ENVIRO-SEAL and HIGH-SEAL live-loaded
packing systems offer exceptional stem sealing
capabilities. These systems easily install in your
existing valves or can be purchased with new
valves. ENVIRO-SEAL and HIGH-SEAL packing
systems help seal your process to conserve valuable
process fluid and protect the environment against
the emission of hazardous or polluting fluids. The
long life and reliability of these systems also reduce
your maintenance costs and downtime.
For process control applications requiring
compliance with mandated environmental protection
regulations, the unique ENVIRO-SEAL packing
system (figure 1) and, for hazardous service, the
ENVIRO-SEAL bellows seal system are offered.
These packing systems keep fugitive emission
concentrations below the 100 ppm (parts per million)
requirement set by the federal Environmental
Protection Agency (EPA).
The HIGH-SEAL packing system (figure 2) provides
excellent sealing at pressure/temperature ratings
beyond ENVIRO-SEAL limits.
Both ENVIRO-SEAL and HIGH-SEAL packing
systems feature live-loading and unique packing-ring
arrangements for consistent, long-term sealing
performance. The ENVIRO-SEAL packing system is
available in double PTFE, graphite ULF, and duplex
configurations. The HIGH-SEAL packing system is
offered without PTFE washers (graphite composite),
for nuclear applications where PTFE is prohibited,
and with PTFE washers (graphite ULF) for all other
applications.
VALVE
BONNET
BELLEVILLE
SPRINGS
VALVE
STEM
PACKING
FLANGE
PACKING
FOLLOWER
W58141* / IL
Figure 1. Fisher easy-et Valve Bonnet with
ENVIRO-SEAL Packing Installed
Features
D Compliance with the Clean Air Act—The
excellent stem sealing of the ENVIRO-SEAL packing
system (figure 2) controls emissions to below the
EPA minimum of 100 ppm (parts per million).
ENVIRO-SEAL packing systems provide an
excellent stem seal to help prevent the loss of
process fluid.
D Improved Service Life—ENVIRO-SEAL and
HIGH-SEAL packing systems, coupled with a very
Product Bulletin
59.1:061
D101633X012
July 2009
Sliding-Stem Live-Loaded Packing