Diaphragm Valves, Larox pinch valves, Stubbe diaphragm valves for Industrial, Mining and chemical applications Australia.
Diaphragm valves are an enclosed body valve in two main styles straight through and weir type.
Straight through type are semi full bore with a convex shaped rubber diaphragm that pushes down to throttle or stop the flow. Therefore straight through types are popular in mining applications.
Weir type are an up and over a hump flow path, having a flatter rubber diaphragm. This allows a short stroke to regulate or give on / off operation. With ease of operation they are ideal as a general process valve in the likes of Chemical Plants, Water treatment facilities and Marine service.
Bodies can be plastic, iron or stainless in threaded and flanged connections although some special pharmaceutical varieties can be clamp-ended. They can also be lined eg glass, ETFE or rubber along with PTFE backed diaphragms for aggressive chemical services The majority are manual valves however they do lend themselves to Actuation which is also part of our package.
Size range is 8nb to 350nb.They are not a high pressure valve and limited to the temperatures of their construction/elastomers. Depending on the selection pressure rating PN 10/16 and up to 175C.
NEWS! As of July 2024 our Pinch Valve range now covers valves up to 3300PSI!
Pinch Valves
Pinch valves can be open or enclosed body valves and are a full flow design, The sleeve (which is sacrificial) is mechanically ” pinched” to regulate or / open close the valve. Some pinch valves can also be pneumatically or hydraulically operated instead of a using a mechanical force.
Generally Pinch valves are a flanged valve from 25nb to 1000nb and limited by their sleeve materials in pressure and temperature. The limiting temperature is around 120 C. Some designs can sustain over 1000psi however most services are low pressures below 150 psi.
Bodies can be iron, steel, stainless or polyamide, most are manually operated and easily actuated if required. As the sleeves are the wear component they are usually carried in stock.
Food Grade Pinch valves
Compact inline stainless steel body pinch valves with food grade liners from DN 40 to DN 200 flanged connections and DN 15 to DN 50 in screwed connects are now available. These valves are air actuated only, or water with consultation / verification to suit the service.