products 

High Performance Butterfly Valves 

Fisher® High Performance Butterfly Valves feature an eccentrically mounted disc and are known for their wide application range and shutoff capability. They are available for a variety of control and isolation service from cryogenic to high temp and pressure classes to ASME CL2500 and sizes from NPS 2 to 72.

POSI-SEAL High Performance Butterfly Valves are designed for isolation on/off service as well as low tier control. The POSI-SEAL valves feature keyed, double D or square valve shafts.  The POSI-SEAL valves are available in sizes NPS 2 to 72, pressure classes up to CL2500. Shutoff is provided by a variety of seals which include metal, PTFE and fire-tested and cryogenic.

 

Fisher 8510Fisher® 8510
Fisher 8510 is a wafer valve, with a splined shaft for throttling control.
8510BFisher® 8510B
Fisher 8510B is a multi-class rated flangeless valve for throttling control.
Fisher® 8532
Fisher 8532 is a high-performance butterfly valve with a splined shaft for throttling control.
Fisher 8560Fisher® 8560
Fisher 8560 is a high-performance butterfly valve with a splined shaft for throttling control.
Fisher® 8580
Fisher 8580 rotary valve offers excellent throttling performance. An approximately linear flow characteristic provides precise throttling control.
Control-DiskFisher® Control-Disk™
Control-Disk rotary valve offers excellent throttling performance.
POSI-SEAL A11Fisher® POSI-SEAL™ A11
POSI-SEAL A11 is a high-performance butterfly valve featuring a keyed or square-end shaft for various on-off applications.
Fisher POSI-SEAL A31Fisher® POSI-SEAL™ A31A
POSI-SEAL A31A is a high-performance butterfly valve featuring a keyed shaft for on-off service.
Fisher POSI-SEAL A31DFisher® POSI-SEAL™ A31D
POSI-SEAL A31D is a double-flange high-performance butterfly valve featuring either a splined drive shaft or a keyed drive shaft for either throttling or on-off applications.
Fisher POSI-SEAL A41Fisher® POSI-SEAL™ A41
POSI-SEAL A41 is a high-performance butterfly featuring a double D shaft for on-off service.
Fisher® POSI-SEAL™ A81
POSI-SEAL A81 rotary valve with FieldQ rack-and-pinion actuator offers automated on-off, quarter-turn performance.
Quick Links 
Control-Disk Brochure