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Checkvalves

An industrial check valve is a crucial component in many flow systems, ensuring the unidirectional flow of liquids or gases. These valves — often referred to as check valves, backflow valves, non-return valves, or back-pressure valves — are designed to prevent reverse flow in pipelines and process facilities. Reliable check valves in industrial applications are essential for maintaining efficient operation and safety in a wide range of scenarios. They provide effective backflow prevention and are indispensable wherever one-way flow is critical. Durable valves for unidirectional flow are key to preserving system integrity and preventing potential damage or inefficiency caused by reverse flow. High-quality valves that ensure safe operation are thus an investment in both productivity and safety for companies utilizing flow systems in their processes or instrumentation. Feel free to explore our selection of check valves, and do not hesitate to reach out for assistance in finding the right product to suit your specific needs.

700 Series: Instrument Check Valves

  • Pressure rating to 3,000 psi (207 bar) at 70°F (21°C).
  • Temperature rating from -10°F to 375°F (-23°C to 191°C) with viton O-ring seat standard.
  • O-ring provides leak tight shut-off.
  • Back stopped poppet design prevents the spring from being over-stressed.
  • Variety of springs are available for the cracking pressure in the range from 1/3 psi to 100 psi.
  • Wide range of body sizes allows Cv choices from 0.16 to 8.8.
  • Suitable for gas and liquids.
  • Variety of end connections include male/female NPT, ISO, BSP threads and female Hy-Lok tube fittings.
  • Body Material is standard in 316 stainless steel and brass.

700H Series: High Pressure Compact Check Valves

  • Pressure rating to 6,000 psi (413 bar) at 70°F (21°C).
  • Temperature rating from -10°F to 400°F (-23°C to 204°C) with Viton seat standard.
  • O-ring poppet design for replaceable high integrity seal.
  • Tight shut-off and accurate cracking pressure.
  • Cracking pressure includes 1/3, 1, 5, 10, and 25 psi.
  • Maximum flow design allows Cv choices from 0.67 to 4.7.
  • Suitable for gas and liquids.
  • Special applications are available in sour gas and fluorocarbon free.
  • Size range from 1/8" to 1" tubing and pipe.
  • Variety of end connections include male/female NPT, ISO, BSP threads and female Hy-Lok tube fittings.
  • Body Material is standard in 316 stainless steel.

701 Series: 1-pc Check Valves

  • Pressure rating up to 3,000 psi (207 bar) at 70°F (21°C).
  • Temperature rating from -10°F to 375°F (-23°C to 191°C) with Viton seat standard.
  • One piece body construction, Wide range of cracking pressures.
  • Ease of adjustment, Size range 1/4" & 1/2" pipe.
  • Body material is 316 stainless steel and Brass.

701A Series: Adjustable Check Valves

  • Pressure rating up to 3,000 psi (207 bar) at 70°F (21°C).
  • Temperature rating from -10°F to 375°F (-23°C to 191°C) with Viton seat standard.
  • One piece body construction, Wide range of cracking pressures.
  • Ease of adjustment, Size range 1/4" & 1/2" pipe.
  • Body material is 316 stainless steel and Brass.

CVL Series: Lift Check Valves

  • Pressure rating up to 413 bar at 21°C
  • Temperature rating from -53°C to 482°C
  • All metal body and poppet construction.
  • Body material is 316 stainless steel.

HiP High Pressure Check Valves

  • Pressure above 10,000 bar
  • NPT, Tappered seal, Collar and Gland for high and ultra high pressure.
  • With and without O-ring seals according to pressure.
  • Valve body in hardened 316 or or extra hardened 17-4PH stainless steel.

Applications and Industries that Use Check Valves

Check valves find broad application across a range of industries and settings where controlling the flow of liquids or gases is essential:

  • Oil and Gas Industry: Frequently utilize these valves in pipeline systems to prevent backflow of fuels.
  • Chemical Industry: Check valves are crucial for maintaining unidirectional flow, especially where quality, leak-tightness, and easy replacement are paramount.
  • Water Supply and Wastewater Treatment: These sectors rely on check valves to prevent contamination and ensure correct flow direction.
  • Food and Pharmaceutical Industries: Check valves help maintain hygienic conditions and prevent cross-contamination.
  • Energy Production: Vital for protecting pumps and turbines against backflow, with focus on efficiency and safety.
  • Alternate Energy: Depend on tight connections for safety and environmental considerations.

Check Valves: Materials and Construction

Check valves from PG Flowteknik are manufactured using high-quality materials to ensure a long service life and reliable operation under demanding conditions. The valve housings are typically made of 316 stainless steel, renowned for its excellent corrosion resistance and strength.

PG Flowteknik offers a wide range of check valves from reputable manufacturers such as Hy-Lok and HiP, providing solutions for various pressure ratings and temperature ranges. Our experienced team can guide you through the available options and help identify the most efficient solution for your flow system. Explore our large selection of check valves, and feel free to contact us for assistance in finding the right product to meet your specific requirements.

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