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Keystone Series 60 Butterfly Valves
Keystone Series 60 heavy duty resilient seated butterfly valves feature a cartridge seat design and are available in a range of body, disc and seat materials to suit a variety of applications.
Features
- Suitable for high pressure and full vacuum service due to the use of a cartridge seat design.
- Triple function cartridge seat isolates the body and stem from the media, provides positive drop-tight shut-off of line media at full rated pressure and provides a flange seal, eliminating the need for flange gaskets.
- Full rated unidirectional dead-end service is achieved by utilizing a unique patented lip in the lug body.(2"-24" only)
- Strong disc-to-stem connection and elimination of exposed pins or bolts is achieved through a rectangular drive.
- Ability to install the valve with the disc in the closed position eliminates the risk of damage to the valve during installation.
- Maximum flow and rangeabililty is achieved with the use of a streamlined disc.
- Blowout-proof stems as a standard.
- Longer seat life with low operating torques is ensured by utilizing upper and lower stem bearings.
- Need for costly brackets is eliminated due to the ability to direct mount actuation onto the valve top-plate.
- Designed to comply with MSS-SP-67 and API 609 (may be shell tested to spec request)