Series 7100 Flow-Lift
®
Piston Check Valve
Award-Winning Design:
Feature-packed valve provides solutions
for gas, air or liquid systems
Features
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
Contents
2
Assemblies
2
Operation &
Installation
4
Special Features
5
Materials
6
Flow Characteristics
7
Specifications
8
How to Order
Engineered
Performance
The Norriseal Series 7100 Piston Check Valve*
is designed for the prevention of backflow in gas, air
or liquid systems. Norriseal’s expertise in the design
of piston balanced control valves has introduced new
concepts to the piston check valve industry.
The piston check valve, with its award-winning
design, has been installed in critical services around
the world.
Working Pressures
ANSI Class 150 thru 2,500
API 5,000 and 10,000
Applications
Air and gas compressor service
Gas or liquid pipe lines
Oil and gas production leases
Pulsating flows
Safety systems
* Received the Special Meritorious Award for
engineering innovation at the 1981 Offshore Technology Conference
in Houston, Texas.
