Features & benefits

• Factory testing of every valve at full rating ensures 100% tight shut-off.
• Actuator flange is standardized for easy operator interchangeability and mount direct to Keystone range of actuators.
• Primary seal is formed by preloaded contact between disc and seat. These seals protect valve from fluid contact.
• Secondary shaft seal is suitable for pressure and vacuum is self-adjusting.
• Steel body provides strength and durability for severe abuse such as fire conditions.
• Flange drilling - Fig.2 has drilled and tapped body meeting JIS/KS 10 and ANSI. Other combinations on request.
• One piece thru-shaft design for high strength and positive disc control.
• Patented dove-tail seat requires no bonding. Makes seat replacement simple and fast. Extra heavy edge section resists tearing.
• Extra heavy seat performs flange gasket function. No gaskets between valve and flange faces are required.
• Shaft seal prevents dirt from entering valve. It also adjusts itself to pressure and shaft motion.
• Hand polished disc edges insure maximum seat life.
• Disc screws connection is positive shakeproof and stronger thand shaft.

General Applications

The Keystone Fig. 2 butterfly valve is the continuous or lugged bodied version of the Fig.1 design. It offers an economical lightweight choice in those applications where flanged valves are considered, but where installation space and cost restrictions, favour the minimum face-to-face dimensions of a wafer-type for temporary isolations as on pump outlets, tank drains, ship sides etc. the body configurations is designed to comply with both metric and imperial flange standards.

Technical Data

• Pressure(kg/cm2) : 10
• Temperature(°C) : -40~120
• Size (mm) : 50~900
• Maximum differential pressure Between flanges : 10kg/cm2
• End of line service : 6kg/cm2