Design Features
Short length of face to face, more shorter than the common flanged butterfly valve, convinient for installed to narrow places.
O-Ring: Helps prevent shaft leakage.
Precision Taper Pin: Ensure positive vibration proof, shaft to disc connection. Field replaceable.
Precision Disc Profile: Provides bubble-tight shut-off and assures maximum effective torque and longer seat life.
Supported Shaft Seal: Bonding of elastomer to phenolic backing ring protects against shaft leakage, a common cause of distortion and deformation.
Applicable to both gaseous mediums and liquid mediums.
Bi-directional shutoff.
Optional maintenance pipeline terminal.

Technical Data

Specification：
Size: DN50-DN1200
Design standard conform to: MSS SP-67, API609, BS EN593
Connection flange conform to: DIN PN10/16/25, ANSI B16.1, BS4504, ISO PN10/16,
JIS B2212/2213, BS 10 Table D, BS 10 Table E
Top flange conform to: ISO 5211
Face to face conform to: API609, ISO5752 series 20, BS5155
Test standard conform to: API598

Pressure & Temperature ratings:

Materials: