Check Valve With Handle
A check valve is a device that only allows the flow of fluids in one direction. They have two ports, one as an inlet for the media and one as the output for the media. Since they only allow media flow in one direction, they are commonly referred to as â??one way valvesâ?? or â??non return valves.â?? The main purpose of a check valve is to prevent backflow in the system. Figure 1 shows an example of a check valve.
A check valve relies on a pressure differential to work. They require a higher pressure on the input side of the valve than the output side to open the valve. When the pressure is higher on the outlet side (or the input side pressure is not high enough), the valve will close. Depending on the valve type, the closure mechanism is different. Unlike other valves, they do not need a handle, lever, actuator, or human to correctly work.
They are commonly installed in applications that backflow would cause an issue. However, since they are non return valves, they are a cheap, effective, and easy solution to solve a potential issue. Backflow can cause an issue if the backflow is contaminated, and therefore, contaminates the media upstream. For example, a sewer line will have a non return valve to ensure that waste can leave but not re-enter the system. They are also used if backflow will cause damage to equipment upstream that can only allow media to flow in one direction. For example, a reverse osmosis filter can only have water pass through it in one direction, so a one way valve is installed downstream to prevent this. There are various sizes, designs, and material to ensure there is a check valve for every application.
Brass Swing Check Valve BS 5154 Pressure Rating : PN-20 Material : Forged Brass Description : Screwed in Cover Ends : Screwed Female to BS:21 Item Code : FLB00045 Size : 15mm Notes : Available Valve Size : 15mm to 50mm
Brass Universal Check Valve BS 5154 Pressure Rating : PN-20 Material : Forged Brass Description : One Piece Body, Spring Loaded, Resilient Seated Ends : Screwed Female to BS:21 Specials : Suitable for Horizontal & Vertical Installation Item Code : FLB00048 Size : 15mm Notes : Available Valve Size : 15mm to 50mm
Forged Steel Check Valve BSEN ISO 15761, ASME B16.34 Pressure Rating : Class-800 Bore : Full & Regular Material : Forged Steel (A105) Description : Bolted Cover (Welded Cover for CL-1500 & 2500) Ends : Socket Weld, Butt Weld, Screwed Specials : LT & Cryo, Fire Safe, Seismic, IBR Item Code : FCS00012 Size : 15mm Notes : Available Valve Size : CLASS-800 8mm to 50mm CLASS-1500 15mm to 40mm CLASS-2500 15mm to 25mm Material : LF2, F5, F9, F11, F22, F304, F304L, F304H, F316, F316L, F316H, F91, F51, F321H, F321
Forged Steel Check Valve BSEN ISO 15761 Pressure Rating : Class-150 Material : Forged Steel (A105) Description : Bolted Cover Ends : Welded on Flanges Specials : LT & Cryo, Fire Safe, Seismic, IBR Item Code : FCS00035 Size : 15mm Notes : Available Valve Size : CLASS-150 15mm to 50mm CLASS-300 15mm to 50mm CLASS-600 15mm to 50mm Material : LF2, F5, F9, F11, F22, F304, F304L, F304H, F316, F316L, F316H, F91, F51, F321H, F321
Gun Metal Swing Check Valve BS 5154 Pressure Rating : Class-150 Material : Gun Metal, Bronze Description : Screwed in Cover Ends : Flanged Item Code : GM000047 Size : 15mm Notes : Available Valve Size : 15mm to 100mm
Gun Metal Swing Check Valve BS 5154 Pressure Rating : PN-20 Material : Gun Metal, Bronze Description : Screwed in Cover Ends : Screwed Female to BS:21 Item Code : GM000045 Size : 15mm Notes : Available Valve Size : 15mm to 100mm
Cast Iron Swing Check Valve Pressure Rating : Class-125 Material : Cast Iron / Ductile Iron Description : Bolted Cover Trim : Gun Metal Ends : Flanged Specials : Dash pot arrangement, By pass arrangement Item Code : CI000017 Size : 25mm Notes : Available Valve Size : 25mm to 600mm
Cast Steel Horizontal Check Valve DIN 2401, BSEN 13709 Pressure Rating : PN-40 Material : Cast Steel (WCB) Description : Horizontal Type, Bolted Cover Ends : Flanged, Butt Weld Specials : IBR Item Code : CCS00011 Size : 15mm Notes : Available Valve Size : 15mm to 200mm Material : LCB, WC1, WC6, WC9, C5, C12, C12A, CF8, CF8C, CF8M, CF3, CF3M, CN7M, CF10, CF10M, 3A, 4A, 5A, 6A etc.
Cast Steel Swing Check Valve API 6D, BS 1868, ASME B16.34 Pressure Rating : Class-150 Material : Cast Steel (WCB) Description : Swing Type, Bolted Cover (Pressure Seal Cover CL-900, 1500 &; 2500) Ends : Flanged, Butt Weld Specials : Fire Safe, Dash Pot Arrangement, By pass Arrangement, IBR Item Code : CCS00007 Size : 50mm Notes : Available Valve Size : CLASS-150 40mm to 900mm CLASS-30040mm to 950mm CLASS-600 40mm to 600mm CLASS-900 40mm to 600mm CLASS-1500� � 40mm to 600mm CLASS-2500 50mm to 300mm Material : LCB, WC1, WC6, WC9, C5, C12, C12A, CF8, CF8C, CF8M, CF3, CF3M, CN7M, CF10, CF10M, 3A, 4A, 5A, 6A etc.
