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Non Return Valve (NRV)

  • Ensures smooth and reliable one-way fluid flow
  • Automatically prevents backflow and pressure loss
  • Protects pumps, pipelines, and system equipment
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Description

The Non Return Valve (NRV), also known as a Check Valve, is an essential flow control device designed to allow fluid or gas to flow in only one direction while automatically preventing reverse flow. The valve operates using system pressure and does not require manual operation or external power.

When fluid flows in the correct direction, the valve opens smoothly with minimal pressure drop. If the flow stops or reverses, it closes instantly to block backflow. This helps maintain system pressure, prevents pump backspin, reduces water hammer, and protects pipelines and connected equipment from damage.

Manufactured from high-quality materials such as Cast Iron (CI), Ductile Iron (DI), Stainless Steel (SS), and Brass, Non Return Valves offer excellent durability, corrosion resistance, and long service life. Available in various sizes, pressure ratings, and standards, NRVs are widely used in fire protection, water supply, HVAC, and industrial piping systems where reliability and safety are critical.

Key Features

  • Automatic one-way flow control
  • Reliable backflow prevention
  • Low pressure drop design
  • Strong and durable construction
  • Reduces water hammer and system shock
  • Minimal maintenance required
  • Suitable for horizontal and vertical installation
  • Available in multiple sizes and material

ApplicationsTechnical Specifications – Non Return Valve (NRV)

Parameter Specification
Valve Type Non Return Valve (Check Valve)
Operation Automatic
Flow Direction One-way
Size Range DN 50 – DN 600 (2″ – 24″)
Pressure Rating PN 10 / PN 16 / PN 25
Body Material Cast Iron (CI), Ductile Iron (DI), Stainless Steel (SS)
Disc / Flap Material Stainless Steel / Ductile Iron
Seat Material EPDM / NBR / Metal Seat
End Connection Flanged (ANSI / DIN / BS Standard)
Working Temperature -10°C to +120°C
Installation Position Horizontal or Vertical
Medium Water, Fire Water, Oil, Air
Leakage Class Zero Leakage
Coating Epoxy Powder Coated
Applicable Standards IS, BS, DIN, ANSI
Applications
  • Fire fighting and fire protection systems
  • Water supply and distribution networks
  • Pump discharge and suction lines
  • HVAC and chilled water systems
  • Industrial process piping
  • Irrigation and agricultural systems
  • Wastewater and utility pipelines

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