Economical Tight Shutoff—The pressure-assisted seal design provides tight shutoff against the full pressure rating of the specified valve.
Safety—Shaft blowout protection is designed into the 8532 valve. The anti-blowout gland fits securely over the valve shaft which has been turned down to form a circumferential shoulder that contacts the anti-blowout gland.
Excellent Flow Control—With a modified equal percentage flow characteristic, the 8532 can be used for throttling applications through 90 degrees of disc rotation. Rangeability is 100 to 1.
Economically Designed for Minimal Deadband—A splined end connection on the drive shaft allows lever clamping by most Fisher rotary actuators.
Application Versatility—Standard construction materials and seal assemblies provide long life and outstanding performance in a broad range of liquid and gas applications.
Ease of Maintenance—Interchangeability of all parts including shafts and discs simplifies service and reduces maintenance costs.
Improved Environmental Capabilities— The optional ENVIRO-SEAL packing system is designed with very smooth stem surfaces and live-loading provides improved sealing, guiding, and loading force transmission. The ENVIRO-SEAL packing system can control emissions below the EPA (Environmental Protection Agency) limit of 100 ppm (parts per million).
Easy Installation—The valve body self-centers on the line flange bolts as a fast, accurate means of centering the valve in the pipeline.
Reliable Flange Gasketing Surface—Seal retainer screws are located so there is no interference with the sealing function of either flat sheet or spiral wound line flange gaskets. 