Series 37ws, Well service valves, Cla-val – Cla-Val 37 Series User Manual

Page 2

E-37 (R-9/06)

1 . R e f e r t o d e s i r e d m o d e l c h a r t o n p a g e s 3 8 , 3 9 o r 4 1 . o f t h i s f i l e .
2 . D e t e r m i n e p u m p f l o w c a p a c i t y ( i n G P M ) a t l i t t l e o r n o h e a d c o n d i t i o n .
3 . R e a d c o r r e s p o n d i n g v a l v e s i z e . I f f l o w c a p a c i t y i s n e a r m a x i m u m o f r a n g e , s e l e c t n e x t l a r g e r

s i z e a s r e c o m m e n d e d . F l a n g e d o u t l e t a v a i l a b l e a t e x t r a c o s t . C o n s u l t f a c t o r y f o r l a r g e r s i z e s

Series 37 Well Service Valves (Heavy
Duty) are supplied with air throttling
devices. These devices permit regulating
the volume of air discharge from the verti-
cal pump column thereby to cushion the
shock from the rising water column, as it
impacts against a closed pump, discharge
check valve or control valve. By utilizing
this type air valve damage to the vertical
turbine pump. Piping and controls will be
prevented. Field adjustment of this air
throttling device is quite simple and
requires no special tools.

Threaded Inlet 1/2" - 3"

Flanged Inlet 4" and Larger

Note:

It is sound engineering practice that outlets of air valves, inside the pump station, be piped to a drain to eliminate high pitched noise of air exhausting.

Series 37WS

Well Service Valves

Available

Flanged

hooded

Well
Service
Heavy
Duty

Light
Duty
Service
See Page 38

Water
Diffuser
Screen
Stainless
Steel

Air throttling

Device

(Double Port)

See Page 39

Well Service
Air Vacuum
Valve

How to Select Size:

CLA-VAL

P.O. Box 1325

• Newport Beach, CA 92659-0325 • Phone: 949-722-4800 • Fax: 949-548-5441 • E-mail: [email protected] • Website cla-val.com

See Page 41

Series 37 Well Service Valves (Light Duty)
well service valves are supplied without air
throttle device. Instead it is fitted with a
water diffuser that function like a water
faucet bubbler to break down a solid col-
umn of water into small streams there by
allowing the water to raise the air valve
float slowly into the closed position.
Recommended where operating pump
pressure are below 40 PSI and GPM
velocities less than 5’ per/sec

Flanged Series 37 Well & Pipeline service
air valves are supplied with Arrestor Check
Valves, function to stop the flow of water,
(for a fraction of a second) entering the
upper chamber of the air valve. The
Arrestor Check then opens instantly, water
enters the air valve, all air is exhausted
and the air valve shuts. This Arrestor
Check action allows for a slow non shock
air valve shut-off. To prevent pump or
pipeline damage the shut-off/open action
of the arrestor check occurs practically
instantaneously. It is self regulating and
requires no adjustment in the field.
Arrestor Check air valves are recommend-
ed at high points where velocities
approach 10’ / second in the main line.

Threaded Inlet 1/2" - 3"

Note: Manufactured to meet ANSI/AWWA C512-04