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Forespar Marelon MF 850 series ball valves are precision moulded in high strength Marelon. Their great strength, light weight, and complete freedom from corrosion and electrolysis make them the ideal valve for controlling inlet and outlet water requirements above and below the waterline.
Forespar engineers opened and closed one of the 3/4”(19.05mm) valves 11,000 times, then submerged it in water with an air line pressurized to 2.76 Bars (40 PSI) connected to it. The result was an absolutely leak free condition with no evidence of internal seal wear.