Brochure
Nonstop High-Cycle Applications | 9
Excellent Shutoff with
Rotary Control Valves
Fisher A81 and 8580 control valves
meet critical shutoff requirements
with the use of unique seal rings
with pressure-assisted sealing action
and spring-loaded shafts that center
the disk in the seal. Low friction
PTFE-lined PEEK bearings maximize
control valve performance. These three
important features allow the control
valves to be cycled over 1,000,000 times
and achieve tight shutoff, making
them ideal for high-cycle applications.
Spring Assembly
Seal Assembly
Spring-Loaded Shaft
PEEK Bearing
The Fisher rotary control valve achieves acceptable Class VI shutoff throughout the life of the testing.