Cla-Val 583 - Manual

CLA-VAL
Copyright Cla-Val 2011 Printed in USA Specifications subject to change without notice.
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
©
SERIES
INSTALLATION / OPERATION / MAINTENANCE
N-583
“Tite Seal” Foot Valves
583
INTRODUCTION
The Cla-Val Series 583 Foot Valves are designed to give years of
trouble-free operation. “Tite Seal” Foot Valves are resilient seated for
handling water and other fluids. The size and non shock cold working
pressure (CWP), and Model No. are stamped on the nameplate. The
valve is intended for installation on the inlet suction of the centrifugal
pump.
Note: The valve is not intended as a block valve for line testing
above the valve rating.
RECEIVING AND STORAGE:
Upon receipt inspect for damage in shipment. Unload valves
carefully without dropping. Do not use slings or chains around valves
spokes or screen assembly for lifting.
Keep valves crated until installed to prevent weather related damage.
For storage greater than six months, store indoors.
OPERATION:
See (Fig. 1) Valve consists of a body, a plug and a seat with resilient
seal. The valves are designed to maintain prime (flooded suction)
when installed on inlet of the suction piping. The “Tite Seal” provides
water tight shutoff and the strainer prevents debris entering the valve
and piping system.
The seat with seal are rigidly connected to the inlet of the Foot Valve.
As flow enters the valve, thru the inlet the plug is lifted into open
position. Upon pump shut down, the return flow instantly closes the
plug against the seat to maintain the pump prime.
CONSTRUCTION:
The Series 583 “Tite Seal” Foot Valve is constructed of cast iron body
with bronze or stainless steel trim.
See details of materials and construction illustrated in figure 1 The
body (1) comes with flanged outlet for bolting to the suction piping.
The body is fitted with a bronze seat (2). The plug (3) is guided by a
bronze bushing (7) locked in the body. “Tite Seal” closure is made
when the resilient seal is compressed by the closed plug. A stainless
steel strainer assembly (12) prevents debris from entering the valve.
5
1
4
3
2
8
9
10
7
6 6
OUTLET
Item No.
1
2
3
4
5
6
7
8
9
10
Description
Body
Seat W/ Buna-N
®
Plug
Bushing
Retainer
Gasket
Screen Retainer*
Ring Plate
Bolt Assembly
Screen
Material
Cast Iron ASTM A126, Class B
Bronze ASTM B584, Alloy C83600
Bronze ASTM B584, Alloy C83600
Bronze ASTM B16, Alloy C83600
Brass
Compressed Non-Asbestos Fiber
Stainless Steel T304, ASTM F879
Carbon Steel ASTM A36
Alloy Steel SAE, Grade 2
Stainless Steel T304, ASTM A240
INSTALLATION RECOMMENDATIONS:
Install with arrow flow direction vertical flow up and with the Foot
Valve Strainer in the wet well or water source. The strainer bottom
should be minimum (1) size diameter from the bottom of the wet
well floor.
FLANGED END: The valve should be mated to ANSI Class 125#
flat-faced flange using a resilient ring gasket. The bolts should be
ASTM A307 Grade B or SAE grade 2 Carbon Steel. Lower Foot
Valve into wet well using slings or chains around the valve body.
Lubricate the flange bolts before tightening around the flange.
Lightly tighten bolts until gaps are eliminated.
Torque the bolts in graduated steps using the cross-over tightening
method. If leakage occurs, allow gasket to absorb fluid and check
torque and leakage after 24 hours. Do not exceed bolt rating or
crush gasket more than 50% of its thickness.
MAINTENANCE:
The Series Foot Valve requires no lubrication or maintenance. If
flow stops or pump cavitation develops It may be necessary to
clean debris from Foot Valve inlet by backflushing the valve or
physically cleaning the outside surfaces of the strainer.
WARNING: Strainer flange must not be removed with water pres-
sure in the Foot Valve or the seat may come loose causing damage
or injury.
TROUBLESHOOTING:
Possible problems and solutions follow to assist troubleshooting
the Foot Valve.
• Leakage at Flanges: Tighten flange bolts, replace gasket.
• Valve leaks when shut: Flush debris from seat by cycling pump. If
leakage continues check the following items and make the
corrections.
1. Verify there is no damage to the rubber seal. Replace if worn
or damaged.
2. Check the metal seat in the body is clean and free of scale
and scratches.
3. Verify that the working pressure does not exceed cold working
pressure (CWP) shown on the foot valve nameplate.
4. Drain wet well with pressure on valve and check strainer
flange seal. Retighten strainer flange bolts or replace gasket.
• Valve Slams: If adjustable pump, add time to the shut down
sequence. Check for trapped air in the pump header, Check inte-
rior of valve bushing for deposits or debris.
• Noisy Pump Operation: Flow noise is normal but loud flow noise
similar to hammering may be due to cavitation. Check for debris on
outside surfaces of the strainer or floor wetwell.
*Recommended Spare Parts