R - Series

Resilient Seal Butterfly Valves
　

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R Series - Features
 Certified firesafe by LIoyds to DOT Rule 54 App.D for
use in fire water mains offshsore and marine
installations.
Tight shut-off in both directions to API 598
Field replaceable resilient disc seal.
ANSI 125Ib, 150Ib, 300Ib ratings.
Single or double offset valve geometry available.
Low seating and unseating torques.
Body designs: Double flanged, water lugged and wafer
flangless.
Flanges to suit any British, American or continental
flange standard including ANSI, API, MSS, BS, PN,
and ISO.
Actuation via manual gearbox, pneumatic, electric or
hydraulic actuators.
Materials available to NACE requirements.
　

Design
The valve is a bi-directional tight shut-off device incorporating a resilient seal mechanically retained around the periphery of the valve disc.The seal is available in various types of elastomers, the selection being dependent on the valve duty and working pressure and temperature. The seal seats against a metal seating surface machined into the body of the valve. * Positive shut-off is achieved without excessive interference between seat and seal ensuring maximum seal life and low seating and unseating torques.

* replaceable seating available as an option.

　

Dimensions:

Class 150# range ( dimensions in mm ) Wafer Lugged

Others...

Class 150# range ( dimensions in mm ) Double Flanged

Others...
　
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