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Check valves inherit the term 'cracking pressure'. When the cracking pressure is reached, the valve will open. When the pressure drops below the cracking pressure and/or back-pressure occurs, the valve closes.
The way a Check valve operates is ideal for preventing contamination from fluid flowing into separate services connected to a common header. This valve works automatically, and typically with no human or external control, such as a valve handle or stem. Check valves have different configurations with the most common being the swing, tilting-disc, wafer, lift, and stop-check valves. Application The swing check valves are used as check valves for oil & gas, petrochemical, power, offshore and other demanding applications. These valves will not allow the flowing of the fluid in reverse direction than that indicated by the arrow.
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Control module inc savetime 2000 series manual. A wide choice of shell and trim materials do cover the whole range of applications, from the every-day type of non-corrosive service to critical service with highly aggressive media. Constructive and functional characteristics • type: bolted cover • flanged ends • mounting position: horizontal, taking care of the flowing direction indicated by arrow • free stroke Execution • basic design according to BS 1868 • face to face according to ANSI B16.10 • flanges according to ANSI B16.5 • flange facings 0.06' raised face for class 150; 300 and 0.25' for class 600 • pressure - temperature ratings according to ASME B16.34 • shell wall thickness according to API 600(hydrostatic seat test) • trim standard: trim 1 main sealing 13% Cr / 13% Cr.
BS 1868: Steel check valves (flanged and butt-welding ends) for the petroleum. All pipework shall have the British Standard Kitemark. Fittings: 6-10 mm. 57 Swing Check Valves BS 1868 Swing Check Valves BS 1868 ORION STEEL VALVES SWING CHECK VALVES BS 1868 - p. 57 Class ASME 150 (PN 20) • 300 (PN 50) • 600 (PN 100).