What is SDNR valve?
When in the open position, screw down non-return globe valves, also known as SDNR globe valves, are used to stop reverse flow and to provide a leak-tight shut off with the option of being used partially open to control flow.
What is an SDNR valve, and what does its acronym stand for?
An SDNR valve (also referred to as Stop, Double Non-Return (SDNR) or Stop and Non-Return valve) is a type of valve designed to control fluid flows within pipelines while providing essential functions. SDNR stands for "Stop, Double Non-Return." This device serves three primary purposes: stopping the flow, preventing backflow and assuring fluid travels only one direction.
When in its closed position, an SDNR valve completely blocks fluid flow. Equipped with two non-return mechanisms that permit forward flow while blocking any reverse flow - effectively preventing backflow and maintaining system integrity. Due to its versatility and reliability, SDNR valves have become widely utilized components across industries that place emphasis on fluid control and backflow prevention.
How does an SDNR valve differ from other kinds of valves?
SDNR valves stand out from other valves due to their unique features and functionalities. While standard isolation valves simply control fluid flow by opening or closing, an SDNR Valve offers additional benefits: acting as a stop valve when required to stop fluid flow entirely - guaranteeing zero leakage with maximum shut-off efficiency - acting as stop valve when needed and including double non-return mechanisms which only allow fluid in one direction while blocking reverse flow; as well as acting as stop valve.
That prevents backflow, increasing pipeline safety and integrity. Combining these two distinct functions into a single valve makes the SDNR Valve an excellent choice for applications where fluid control and backflow prevention are crucial elements. Where other valves may excel in specific areas but lacked comprehensive capabilities of an SDNR valve makes this valve ideal for many industries and fluid control situations.
What industries and applications commonly utilize SDNR valves?
SDNR valves have become a mainstay in numerous applications and industries, from water supply systems, wastewater treatment plants and sewer networks to oil and gas pipelines, where controlling fluid flow and preventing backflow is crucial to pipeline integrity and the prevention of hazardous fluid reversals. Furthermore, SDNR valves are widely utilized by chemical processing plants, power generation facilities and various industrial processes requiring precise fluid regulation with backflow protection as critical functions.
Design Specification | DIN EN 13709 STOP Type (DIN 3356) |
Working Temperature (°C) | -10ºC : +300ºC |
Connection Type | Flanged, Lugged |
Operation Type | SDNR |
Flange Specification | EN 1092-1/B (DIN 2501) |
Stem Type | Rising Stem |
Bonnet Type | Bolted |
Trim Material | Stainless Steel |
Pressure Rating (PN) | 10/16 |
Size | 50NB — 600NB |
Gland Follower | Cast Iron , Cast steel , Ductile Iron ,CF8,CF8M. |
Application & uses | Offshore Oil Wells Petroleum Industry Power Plants HVAC Sanitary Food Processing, Pharmaceutical and Brewing Systems |
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SDNR Valves in Distillery Plants
SDNR Valves in Sugar Industries
SDNR Valve in Process Industries
SDNR Valve in Power Plants
SDNR Valve in Refineries
SDNR Valve in Petrochemical Plants
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Stainless Steel SDNR Valve
Stainless steel valves are very resilient because of their steel construction and high level of corrosion resistance. Steel valves are unaffected by extremely high or low temperatures. Often, brass or plastic valves are only rated for a smaller temperature range than steel valves.
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Carbon Steel SDNR Valve
Carbon steel valves are utilised in hydraulic-based applications because to their outstanding resistance to the corrosive tendencies of water and other liquids. Its high carbon content improves the function of the valve and also provides superior mechanical qualities and a long lifespan.
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Cast Iron SDNR Valve
At numerous industrial sites, cast iron valves are frequently utilised in plumbing, air conditioning, water and sewer systems, and utility systems.
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Alloy Steel SDNR Valve
Alloy steel valves that meet or beyond governmental and international standards. A valve made of alloy steel has three continuous flow operations, which are among its most crucial characteristics.
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