Check Valve: Ductile Iron - Class 150 - Swing Wafer Style
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Check Valves
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Sizes:
2" ~ 12"
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Class 150
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Swing-Wafer Style
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Buna-N Seat
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Stainless Trim
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Model:
CV 31-DI
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Automatic
Shut-Off
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Minimizes Water
Hammer
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Minimal Head
Loss
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WORKING
PRESSURE & TEMPERATURE
NON-SHOCK |
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WOG:
(water, oil, gas)
Ductile Iron ASTM A536 Class 150 |
250 PSI @
100 F (1) |
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Buna-N
Seat |
-20 ~ 250
F |
1. As the
temperature increases, the load capacity of the
spring diminishes significantly. At higher
temperatures, Inconel Springs must be used.
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Ductile Iron check valves offer
higher pressure ratings than Cast
Iron check valves. For example,
Ductile Iron check valves (2"
~ 24") are rated at 250 PSI WOG. By
comparison, Cast Iron check valves
(2" ~ 12") are rated at 200
PSI WOG and (14" ~ 24") are
only rated at 150 PSI WOG. |
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Shut-off is achieved via the fully automatic,
spring- assisted disc that closes near zero flow
velocity
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Quick closure of the disc helps to reduce water hammer
by creating a positive shutoff prior to flow
reversal
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Head loss is minimized by providing a compact
face- to-face and a virtually unobstructed flow
path
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Ductile iron body maintains the anti-corrosive
properties of cast iron while achieving a yield
strength comparable to carbon steel
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Can be installed in any position: vertical (with
upward flow only) or horizontal
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Anti-corrosive, stainless steel trim (disc,
spring, and shaft) are standard
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Field replaceable soft seat (o-ring) and
precision machined disc ensure a bubble-tight
seal
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Narrow face-to-face
dimensions and lightweight design provide an economical, space-saving solution
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