Description
Swing-Check Valve Wafer Pattern
Description
These wafer pattern swing-check non-return valves are designed to fit between flanges. The valves, which include 'o' ring seals on both sides, have excellent corrosion-resistant characteristics and can be dismantled for maintenance and inspection purposes.
Pressure & Temperature Rating
Swing-check valves have a pressure rating of 15 bar (215 psi) at 20oC.
As temperature increases the pressure rating is reduced. PVC systems should not be used where temperatures exceed 60oC.
Sizing - Solvent Weld Pipe & Fittings
Imperial (inch) PVC pipe and fittings sizing is not straightforward. They are sized by their nominal bore or approximate inside diameter.
The following table details pipe outside diameters (o.d.) for each imperial size. The inside diameter (i.d.) of the socket end of the corresponding fitting will be the same as the outside diameter of the pipe.
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Sizing - BSP Threads
The following table details approximate thread diameters for male BSP threads.
| Nom Pipe Size | 1/2" | 3/4" | 1" | 1 1/4" | 1 1/2" | 2" | 2 1/2" | 3" | 4" |
| Thread Dia mm | 21.0 | 26.4 | 33.2 | 41.9 | 47.8 | 59.6 | 75.2 | 87.9 | 113.0 |