Cla-Val 501A Series - Manual

Wafer Swing Check Valve
Recommendations for Installation Position
1. Install the valve in horizontal or upward flow for proper valve closure.
Caution: Do not use with reciprocating compressors, or in other pulsating services.
SPECIFICATIONS
The wafer swing check valve shall have torsional a
spring-assisted fast closure to minimize possibility of
water hammer. The valve shall be constructed of
either cast iron or steel body.
The body shall have a machined dovetail groove to
retain a field replaceable Nitrile (Buna-N
® ) Seal that
provides water-tite shut-off at low/high pressure
The valve disc/arm assembly shall be one piece
design utilizing an integral disc arm for connection to
the shalt for positive shut-off and no disc flutter.
For corrosion resistance the valve shall be
Electroless Nickel Plated
Valve Body:
2" -12" Cast Iron ASTM A48
Electroless-Nickel Plated
14" - 30" Carbon Steel ASTM A216 WCB
Electroless-Nickel Plated
Valve Trim:
2" - 12" 316 Stainless Steel ASTM A23,
14" - 30" Carbon Steel ASTM A216 WCB
Electroless-Nickel Plated
Seat O-ring: Nitrile, Other Seat Materials Available
All materials conform to ASTM specifications, The valve
shall be a Cla-Val Series 501A Wafer Swing Check Valve,
Newport Beach, CA 92659-0325
Series 501A
• Low Head Loss
• Watertight Nitrile Seat
• Spring Assisted, Fast Closure
• Extremely Light Weight
DESCRIPTION
Cla-Val Series 501A Wafer Swing Check Valve has a quick,
spring-assisted closure that minimizes the possibility of
water hammer. The swing check design offers low head loss
and a full-flow passageway making it ideal for water or waste-
water applications. The short lay length of the valve allows
for a space-saving design. It is available in sizes 2” to 30”,
with either a 125 lb. or 150 lb. pressure class rating.
Available in a variety of materials, including all 316 stain-
less steel, the Cla-Val Wafer Swing Check Valve uses a
standard soft seat to ensure a drip-tight seal. For ease of
installation, valves 6” and larger are supplied with a tapped
hole to mount an eye bolt for lifting. All materials conform
to ASTM specifications, ensuring performance reliability.
NORMAL FLOW
NORMAL FLOW
NORMAL FLOW
Note Hinge
Position
NORMAL FLOW
Note Hinge
Position
NORMAL FLOW
NORMAL FLOW
NORMAL FLOW
NORMAL
FLOW
Note Hinge
Position
Typical Applications with
Correct Valve Location Avoid These Applications
with Incorrect Valve
Location
Standard Style
2”-12”
Note: Allow minimum
(2) pipe diameters
clearance downstream
of check valve with
disc open to promote
smooth flow