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Tilting-disc inconel check valve Check valve symbol on piping and instrumentation diagrams.The arrow shows the flow direction. Vertical lift check valve. A check valve, non-return valve, reflux valve, retention valve, foot valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction.
It was initially available as a 2.0-litre 8-valve version, and later in 2.0 and 2.3-litre 16-valve versions from 1989 to the end of production of the MK2 Ford Galaxy in 2006. It powered various Ford models during this time, but was most well known in the rear-wheel drive "Twin Cam" variants of the Ford Sierra and Ford Scorpio .
cast aluminium alloy; two valves per cylinder, 8 valves total, hydraulic bucket tappets, timing belt-driven single overhead camshaft (SOHC) fuel system Pierburg 1B3 downdraft carburettor dimensions length: 502 mm (19.8 in), width 656 mm (25.8 in), height 593 mm (23.3 in), dry mass: 111 kg (245 lb) EWG-rated motive power & torque output
A double check valve or double check assembly (DCA) is a backflow prevention device designed to protect water supplies from contamination. [1] It is different from the two-way check valves (sometimes erroneously referred to as double check valves) used in air brake systems on heavy trucks which select from the highest pressure source.
In the case of the downstream check valve passing, the differential pressure relief valve prevents the possibility of the chamber pressure from exceeding the supply pressure. It is theoretically possible that, when both valves are faulty, backflow could occur, should the reverse flow rate exceed the capacity of the relief valve.
The downstream side is the pipe or open air where the PORV directs its exhaust. The outlet pipe is typically larger than the inlet. 2 in × 3 in (51 mm × 76 mm), 3 in × 4 in (76 mm × 102 mm), 4 in × 6 in (100 mm × 150 mm), 6 in × 8 in (150 mm × 200 mm), 8 in × 10 in (200 mm × 250 mm) are some common sizes.