Check Valve

Check Valve Manufacturer in Canada

A check valve is a one-way, non-return valve that opens automatically when flow moves forward and closes when flow attempts to reverse, protecting pumps, compressors, and downstream equipment from backflow damage without needing any external actuation. As a leading Check Valve Manufacturer in Canada, ValvesOnly Canada manufactures dependable non-return solutions for facilities across Calgary, Edmonton, Toronto, Vancouver, and beyond.

Why Are Check Valves Used? 

Reverse flow doesn't just waste energy, it can slam back into a pump, damage compressor blades, or send pressure surges through a system that was never designed to handle them. A check valve exists purely to prevent that. It has no handle, no actuator, and no manual control. Pressure differential alone drives it, opening under forward flow and snapping shut the moment flow tries to reverse.

Mechanism of Check Valves:

  • Forward flow pushes the disc or plate off the seat, letting media pass through
  • The moment flow reverses, that same pressure differential forces the disc back onto the seat
  • Closure happens automatically, with no signal, no power source, no operator involvement
  • Response speed depends heavily on valve type, which is why choosing the right configuration matters as much as the material grade

Size, Pressure and Temperature Range:

Parameter Range
Size Range ½\" to 48\"
Pressure Class Class 150 to Class 2500
Temperature Range -29°C to 650°C
End Connections Flanged, Butt Weld, Socket Weld
Operation Fully Automatic

 

How to Choose the Right Check Valve? 

Selection of check valves is not only about their size. The flow velocity, possibility of water hammer effect, orientation (whether the installation will be horizontal or vertical), allowable pressure drop, type of medium, and responsiveness of the valve are among the aspects that should be taken into consideration when selecting the valve.

Material Grades:

Category Material / Grade Standard Common Use
Carbon Steel WCB, LCB, LCC ASTM A216, A352 General industrial and pipeline service
Stainless Steel F304, F316, F316L, F321, F347 ASTM A351, A182 Corrosive, high-temperature service
Duplex Steel F51 (2205) ASTM A890 Offshore and seawater applications
Super Duplex F53, F55, 2507 ASTM A890 Aggressive chloride environments
Alloy 20 CN7M ASTM A351 Acidic process systems
Hastelloy C276, B3 ASTM B564 Severe chemical service
Inconel 625, 718 ASTM B564 High-temperature, high-pressure systems
Incoloy 800, 825 ASTM B564 Thermal and corrosive applications
Aluminium Bronze C95400, C95800 ASTM B148 Marine and brackish water systems

Standards and Testing:

Every check valve we manufacture is designed to API 594, API 6D, ASME B16.34, and BS 1868. Testing follows API 598, covering hydrostatic shell testing, seat leakage testing, and functional closure checks to confirm reliable sealing under real operating pressure.

Common Industries Using Check Valves:


ValvesOnly Canada check valves protect critical equipment across:

  • Oil and gas processing
  • Power generation
  • Water treatment and distribution
  • Petrochemical and refinery systems
  • Marine and offshore operations

What Sets These Valves Apart:

  • Complete automation without any external manipulation
  • Wedge and dual disk models for compact arrangements
  • Non slam valves designed to minimize water hammer effects
  • High pressure and temperature ratings
  • Low pressure losses through valve body
  • Fast shutting to minimize reverse flow exposure

Finding the Right Check Valve:

Be it swing, dual plate, lift, or tilting disc type, the correct option will be determined based on your flow velocity and risk of water hammer among other things. At ValvesOnly Canada, we will evaluate your operational parameters and provide you with the appropriate design and material grade.