Series 7100 Flow Lift®

Norriseal-Wellmark proudly services this product.
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Non-slam piston check valve designed for positive prevention of back-flow in gas, air or liquid systems. This award-winning design, has been installed in critical services around the world, including:

• Air and gas compressor service
• Gas or liquid pipe lines
• Oil and gas production leases
• Pulsating flows
• Safety systems

Available in 1.0-inch through 4-inch sizes in ANSI 150 to 2500 pressure classes in threaded, raised face or ring joint end connections, with optional reduced port trims for low-flow applications.

• No-slam closing
• No special tool required to change seat
• Low pressure drop
• High Cv values
• Smooth opening
• Special trims for abrasive and corrosive services
• Built-in lifting device for piston removal and inspection
• PTFE self-lubricating piston seal
• Low maintenance costs
• Bolted closure

• ANSI Class 150 thru 10,000
• API 5,000 and 10,000
• Seal ring: PTFE spring energized
• Seat: cage retained type
• Optional trim meets MR0175 recommended practice