PTFE Sealed Firesafe Valve
	Firesafe and non-firesafe: Certified firesafe to BS 6755 part 2.
	Sizes: 3” (750mm) to 48” (1200mm)
	Body styles: Double flanged, water lugged, wter flangeless
	Geometry: Double offset giving low unseating and seating torques electroless nickel plated spherical blade periphery
	Pressure ratings: ANSI 150#, 300#. PN 10, PN 16, PN 25. Others on request.
	View Sizes and Specs Additional Information

The shaft is of one piece construction with an anti blow out feature on the non drive side and a reduced diameter at the actuator end. If failure of the shaft -to- disc connection, or internal failure of the shaft occurs due to excessive torque, no portion of the shaft can be ejected from the valve as result of internal pressure. This single piece construction also provides a rigid assembly when pinned to the disc via means of shaft pins (penned over and locked). This prevents excessive disc deflections, which maintains a constant disc/insert contact stress ensuring a bi-directional sealing valve at both low and high pressures. The valve has a double offset design providing a camming action. This eliminates excessive wear between the seat and disc-sealing interface both during the opening and closing strokes extending the sealing life of the valve.

Maintenance of the valve is quick and relatively simple. The PTFE insert, seat gasket and secondary seat can be replaced by simply unbolting the retaining ring and assembling the new parts without removing any other parts. Gland packing is simply adjusted by tightening gland nuts, which are easily accessible between the mounting legs without having to remove the adapter plate or actuator.