The Shand & Jurs 96311 Internal Safety Valve is applicable wherever liquids are stored or transferred. It is an essential safeguard against the hazards of exposure fire and a valuable aid in accident prevention.
The 96311 is available in standard sizes of 2″, 3″, 4″, 6″, 8″, 10″ 12″ and 14″. Construction includes a steel body, stainless steel spring and stainless steel overlay on the pallet and valve seat. Also available in all 316 stainless steel construction and other special steels for corrosive and refrigerated services.
The unique stem design has a center pivot and a nylon bearing to resist the effects of corrosion fouling. New linkage design provides maximum clearance for high flow capacity.
The valve is opened manually and is held open by a chain and fusible link. The link releases at 212°F or at other temperatures as required and the spring loaded valve automatically closes. When opening the valve against a blocked line, the pilot pallet, opens first which equalizes the pressure across the main pallet allowing the valve to be opened the rest of the way with minimum effort.
The central mounting flange is one size larger than the nominal pipe size (see table of dimensions). Standard flanges are raised face to match ANSI 150 pound series permitting mounting on standard API single flange nozzles.
Extra large mounting flanges are available for use where internal piping is required for connection to suction heaters, blending spiders, etc. Any of the flanges can be specified blank for welding.