CHECK VALVES (Swing/Dual)
The valve that used to prevent backflow in a piping system is known as a check valve. It is also known as a non-return valve or NRV. A check valve is basically a one-way valve, in which the flow can run freely one way, but if the flow returns the valve will close to protect the piping, other valves, pumps etc. If the flow returns and no check valve is installed, water hammer can occur. Water hammer often occur with an extreme force and will easily damage a pipeline or components. Check valves are often placed on the outlet side of a pump, to protect the pump from backflow. Check valves are very often used in HVAC-systems (Heating, Ventilating and Air Conditioning-systems).
Size: ½″ up to 36″ (DN 15 up to DN 900)
Pressure Rating: ASME 150# to 1500#
Materials: Carbon Steels, Low Temperature Carbon Steel, Martensitic Steels, Austenitic Stainless Steel, Duplex Stainless Steels, Super Duplex Stainless Steels, Nickel Alloys, Nickel Aluminum Bronze, Hastelloy, Inconel, Titanium Alloy & Carbon Steel with Internal Corrosion Resistant Alloy (CRA) Overlay
Construction Details: Bolted Cover Swing Check Valve / Pressure Seal Cover Swing Check Valve, Dual Plate Check Valve, single Plate Check Valve
Design Standard: BS 1868, API 594, ISO 15761, API 6D
Test (Inspection) Standard: API 598, ISO 5208, BS 6364. BS EN 12266 Part-1.
Pressure / Temperature Rating: ASME B 16.34, API 594
End Connection: Screwed, Socket Weld, Flanged RF/FF/RTJ RING JOINT, Butt-Weld
Operator / Actuator: Self, Self with Hydraulic / Pneumatic Damper
Different Types of Check Valves are available:
• Swing Check Valve
• Dual Plate Check (RETAINER / RETAINER LESS)
• Piston Check Valve
• Ball Type Check Valve
