The Flapper Type NRV (Non-Return Valve) is a type of check valve that allows fluid (liquid or gas) to flow in only one direction and prevents backflow. The valve operates automatically — the pressure of the fluid opens the flapper disc, and when flow stops or reverses, the disc closes under its own weight or with the help of a spring to prevent reverse flow.
This specific NRV is designed for 3-inch pipeline systems and is constructed using Carbon Steel (CS) for strength and durability in medium to high-pressure applications. The flapper-type design provides a full-flow passage with minimal pressure drop and is ideal for systems that require reliable, low-maintenance backflow prevention.
📐 Specifications:
Parameter
Details
Type
Flapper Type Non-Return Valve (NRV)
Size
3 inch (DN 80)
Material of Construction (MOC)
Carbon Steel (CS)
End Connection
Flanged (as per ANSI B16.5 Class 150/300 or as specified)
Pressure Rating
ANSI Class 150 / 300 (confirm based on application)
Temperature Range
-29°C to +425°C (depending on sealing material)
Flapper/Disc Material
CS or Stainless Steel (optional for corrosion resistance)
The Flapper Type NRV (Non-Return Valve) is a type of check valve that allows fluid (liquid or gas) to flow in only one direction and prevents backflow. The valve operates automatically — the pressure of the fluid opens the flapper disc, and when flow stops or reverses, the disc closes under its own weight or with the help of a spring to prevent reverse flow.
This specific NRV is designed for 3-inch pipeline systems and is constructed using Carbon Steel (CS) for strength and durability in medium to high-pressure applications. The flapper-type design provides a full-flow passage with minimal pressure drop and is ideal for systems that require reliable, low-maintenance backflow prevention.
📐 Specifications:
Parameter
Details
Type
Flapper Type Non-Return Valve (NRV)
Size
3 inch (DN 80)
Material of Construction (MOC)
Carbon Steel (CS)
End Connection
Flanged (as per ANSI B16.5 Class 150/300 or as specified)
Pressure Rating
ANSI Class 150 / 300 (confirm based on application)
Temperature Range
-29°C to +425°C (depending on sealing material)
Flapper/Disc Material
CS or Stainless Steel (optional for corrosion resistance)
