Pipe Repair products offer a fast, safe way to seal splits, holes, and corroded sections instantly – often under full system pressure – avoiding the need for expensive and time-consuming network shutdowns.
Duck bill check valves are reliable and cost-effective alternatives to flap-gate, inline, and other conventional check valves. PosiFlex offers slip-on (style 4001), flanged (style 4200) and in-line check valves (styles 4300, 4320 & 4350) – perfect for retrofitting existing interceptors, manholes, and vaults.
Pressure Ratings
WaterWaste Water
Customer to specify requirement.
Gas
Customer to specify requirement.
Pipe Materials Caveats
PosiFlex – Style 4200 Flange Type
Caveat 1
Contact Viking Johnson for available options.
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PosiFlex – Style 4200 Flange Type
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Why Choose PosiFlex – Style 4200 Flange Type
Eliminates backflow and seals around entrapped solids
25mm to 2438mm (1″ to 96″) DN
Rugged all elastomer construction is a full variety of materials
Maintenance free operation with no mechanical components that can corrode or freeze
Lower head loss than conventional check valves
Will open with as little as 25mm WC. Drop tight at 30psi over 18.3m WC
Quiet opening, no slamming
Non-plugging Provides corrosion and abrasion resistance
Versatile construction for a wide range of applications
Standard flange drillings include: ANSI and BS EN-DIN1092 PN16
Full faced internal elastometric flange ensures a complete seal while a need for gaskets
Retaining rings available in galvanised, 304 stainless steel and 316 stainless steel
Water
Waste Water
Gas
