Check valves, or non-return valves, are installed in pipeline systems to allow flow in one direction only. They are operated entirely by reaction to the line fluid and therefore do not require any external actuation. In this text, the expected, or desired direction of flow is termed 'forward flow’, flow in the opposite direction is 'reverse flow'.
Reasons for using check valves, which include:
• Protection of any item of equipment that can be affected by reverse flow, such as flow meters, strainers and control valves.
• To check the pressure surges associated with hydraulic forces, for example, water hammer. These hydraulic forces can cause a wave of pressure to run up and down pipe work until the energy is dissipated.
• Prevention of flooding.
• Prevention of reverse flow on system shutdown.
• Prevention of flow under gravity.
• Relief of vacuum conditions.
High quality JIS stainless steel flanged check valve 10K from chinese factory: Design standards JIS B2074 B2084 Flange Standard JIS B2212 B2214 Structure standard JIS B2002 The standard JIS B2003 The H42W Day marked without the impact of the non-return valve design Company ...
API Stainless Steel Ball Valve Casting China Famous Ball Valve Ball Valve China Manufacturers Stainless Steel Ball Valve 1. Design and Manufacture: API 6D 2. Face to Face: ASME B16.10 3. Flange End: ASME B16.5 4 Test: API 598 Main parts and materials Parts Name Materials Body ...
API Stainless Steel Motorized Globe Valve China Famous Globe Valve Technical Requirement: 1. Design and Manufacture: ASME B16.34 2. Face to Face: ASME B16.10 3. Flange End: ASME B16.5 4 Test: API 598 Yuanda-motorized globe valve Parts Name Materials Body、Bonnet ASTM A351 Disc ...
Specifications: Nominal diameter: 1/2 Inch-48 Inch (DN15-DN1200). Pressure range: Class 150-2500 LB (PN16-PN420). Body Materials: Carbon Steel, Stainless Steel, Alloy Steel, Duplex Steel. Trim (Disc, Stem): Carbon Steel, Stainless Steel, Duplex Steel, Alloy Steel. End ...
DIN/API Cast Steel Check Valve Specification Valve Size: DN25-DN1200. Pressure Rating: PN 10-PN 250, Class 150~Class 2500 Material: WCB,LCB,WC1,WC6,WC9,C5,CF3,CF3M,CF8,CF8M and other Alloy. Design & Manufacture: DIN 3840, BS EN 1868,API6D Face to Face Dimension: DIN ...
Class150-900/PN16-PN100 H74 H76 Cast Steel Wafer Swing Check Valve Parameter of the products Operating Pressure PN 1.6-10Mpa Test Pressure Body 1.5times Seal 1.1 times Working temperature -29-425℃ Application for Water,oil,gas 1 Design standard MSS SP-67,API609,EN593 2 ...
1. Material:precision casting stainless steel 304(CF8) 316(CF8M),304L,316L 2. Nominal pressure:200PSI/PN16 3. Working Temperature:from -20degree centigrade to 200degree centigrade 4.Specifications and Features: 1/2inch-4inch; Full port;blow-out proof stem;ISO5211 Mounting Pad ...
1.Material:precision casting stainless steel 304(CF8) 316(CF8M),304L,316L 2.Nominal pressure:200PSI/PN16 3.Working Temperature:from -10degree centigrade to 150degree centigrade 4.Specifications and Features: 1/2inch-1inch Full port;blow-out proof stem;locking device ...
1.Material:precision casting stainless steel 304(CF8) 316(CF8M),304L,316L 2.Nominal pressure:1000PSI/PN63 3.Working Temperature:from -10degree centigrade to 150degree centigrade 4.Specifications and Features: 1/4inch-4inch; Full port;blow-out proof stem;locking device ...
1.Material:precision casting stainless steel 304(CF8) 316(CF8M),304L,316L 2.Nominal pressure:1000PSI/PN63 3.Working Temperature:from -10degree centigrade to 150degree centigrade 4.Specifications and Features: 1/4inch-4inch ; Full port ;blow-out proof stem;locking device ...