Cla-Val 584 User Manual

INSTALLATION / OPERATION / MAINTENANCE

INTRODUCTION

The Model 584 Flex-Check Valve™ has been designed to give
years of trouble-free operation. This manual will provide you with
the information needed to properly install and maintain the valve
and to ensure a long service life. The valve is opened by the fluid
flow in one direction and closes automatically to prevent flow in the
reverse direction. An optional return flow actuator may be mount­ed on the bottom of the valve to allow manual backflow through the
valve in the reverse direction.
The valve is of the flex check type utilizing an angled seat and fully
encapsulated, resilient disc. It is capable of handling a wide range
of fluids including flows containing suspended solids. The size,
flow direction, maximum working pressure, and Model No. are
stamped on the nameplate for reference.

CAUTION: Do not use valve for line testing at pressures high­er than nameplate rating or damage to valve may occur.

The "maximum working pressure" is the non-shock pressure rating
of the valve at 150˚F. The valve is not intended as an isolation
valve for line testing above the valve rating.

Model

584

Flex-Check Valve

CAUTION: The use of ring gaskets or excessive bolt torque
may damage valve flanges.

TABLE 1. FLANGE BOLT TORQUES

Valve

Size (in)

3 5/8 25 90
4 5/8 25 90
6 3/4 30 150

8 3/4 40 150
10 7/8 45 205
12 7/8 65 205
14 1 80 300
16 1 80 300
18 1 1/8 100 425
20 1 1/8 100 425
24 1 1/4 150 600

Bolt

Dia (in)

Recommended

Torque (ft-lbs.)

Max.

Torque (ft-lbs)

RECEIVING AND STORAGE

Inspect valves upon receipt for damage in shipment. Unload all
valves carefully to the ground without dropping. Do not allow lifting
slings or chains to come in contact with the seat area; use eyebolts
or rods through the flange holes on large valves.

WARNING: Do not use threaded holes in cover for lifting the
valve. Serious injury may result.

Valves should remain crated, clean and dry until installed to pre­vent weather related damage. For long term storage greater than
six months, the rubber surfaces of the disc should be coated with
a thin film of FDA approved grease such as Lubriko #CW-606. Do
not expose disc to sunlight or ozone for any extended period.

INSTALLATION

Correct installation of the Model 584 Flex-Check Valve™ is impor­tant for proper operation. It may be installed in horizontal or verti­cal flow-up applications. When horizontal, however the valve must
be installed with the nameplate facing up and the cover level. In all
installations, the flow arrow cast in the valve cover must be point­ed in the direction of flow during normal system operation.

WARNING: Do not use threaded holes in cover for lifting the
valve. Serious injury may result.

Flanged valves should only be mated with flat-faced pipe flanges
equipped with full-face resilient gaskets. The valve and adjacent
piping must be supported and aligned to prevent cantilevered
stress on the valve. Once the flange bolts or studs are lubricated
and inserted around the flange, tighten them uniformly hand tight.
The tightening of the bolts should then be done in graduated steps
using the crossover tightening method. Recommended lubricat­ed torque values for use with resilient gaskets (75 durometer) are
given in Table 1. If leakage occurs, allow gaskets to absorb fluid
and check torque and leakage after 24 hours. Do not exceed bolt
rating or extrude gasket.

Cover Bolt
(Alloy Steel)

Body
(Ductile Iron)

Disc*
(Steel and Nylon
with Buna-N®)

*Recommended Spare Parts

MAINTENANCE

The Model 584 Flex-Check Valve™ requires no scheduled lubrica­tion or maintenance. For service or inspection, the valve can be
serviced without removal from line.

VALVE INSPECTION: If inspection of the valve is required, follow
the Disassembly Instructions.

Cover
(Ductile Iron)

Cover Seal*
(Buna-N®)

TROUBLESHOOTING

Cap

(Vinyl)

Bushing

(Brass)

Rod Wiper*

(Molythane)

O-Ring*

(Buna-n®)

Handle

(Stainless Steel)

Rod

(Stainless Steel)

Jam Nut

(Brass)

Several problems and solutions are presented below to assist you in
troubleshooting the valve.

• Leakage at Bottom Actuator: Remove line pressure and
exercise actuator. If leak persists, replace seals in actuator;
see the Return Flow Actuator Seal Replacement Procedure

• Leakage at Cover or Flanges:

• Valve Leaks when Closed:

Tighten bolts, replace cover seal.

Inspect disc for damage and

replace. Inspect body seating surface and clean if necessary.

• Valve Does not Open: Check for obstruction in valve or

pipeline. Operating pressure may be less than cracking pressure.

If less than 0.5 psig, review application with factory.

DISASSEMBLY

The valve can be disassembled without removing it from the
pipeline. Alternately, for convenience, the valve can be removed
from the line. All work on the valve should be performed by a skilled
mechanic with proper tools and a power hoist for larger valves.
Disassembly may be required to inspect the disc for wear or the
valve for deposits.

WARNING: The line must be drained before removing the cover
or pressure may be released causing bodily harm.

1 Relieve pressure and drain the pipeline.

Remove the cover bolts on the top cover.

2 Carefully pry cover loose and lift off. 12” and larger valves

have tapped holes in cover for lifting eyebolts. Avoid damage to
epoxy coating.

3 Remove disc and inspect for cracks, tears or damage in

rubber sealing surface.

4 Clean and inspect parts. Replace worn Disc or Cover Seal as

necessary and lubricate with thin film of FDA grease, such as
Lubriko #CW-606. Epoxy Coating can be cleaned with wet rag.

RE-ASSEMBLY

All parts must be cleaned. Worn, gaskets and seals should be
replaced during reassembly.

1 Lay new disc over seat with beaded seating surface directed

down and hinge at valve body top near inlet.

2 Lay cover gasket over sea,l and then place cover over bolt

holes and disc hinge.

3 Insert lubricated bolts. Be certain that long bolts are used in the

hinge area.

4 Cover bolts should be tightened in a cross over pattern to

following specifications.

5 Return valve to service by slowly repressurizing system.

TABLE 2. VALVE COVER BOLT TORQUES

Valve Size (inches) Cover Bolt Size Torque (ft-lbs.)

2 - 2.5 1/2 75

3" 7/16 50

4 1/2 75
6 7/16 50
8 9/16 100

10 3/8 200

12 - 20 7/8 250

24 1 300

TIGHTEN BOLTS IN A "STAR" OR "CROSS-OVER" PATTERN

CLA-VAL

P.O. Box 1325 • Newport Beach, CA 92659-0325 • Phone: [phone] • Fax: [phone] • E-mail: [e-mail] • Website cla-val.com

©

Copyright Cla-Val 2011 Printed in USA Specifications subject to change without notice.

RETURN FLOW ACTUATOR OPERATION:

WARNING: Relieve line pressure before using backflow actua­tor or damage may occur.

An optional return flow actuator assembly is available which can be
easily installed in the field. The actuator is not designed to operate
at the valve’s maximum working pressure rating, therefore, prior to
using the actuator, close all isolation valves and bleed off line pres­sure. To operate, turn the handle clockwise. This will open the valve
disc allowing backflow through the valve. The handle should turn
easily. When resistance is felt, the disc has reached its body stop
and is in the full open position. Upon completion of the back flushing
operation, turn the handle counter-clockwise and the valve will auto­matically return to the closed position. Lock the actuator in the
closed position with the jam nut provided. The system is again ready
for normal operation.

RETURN FLOW ACTUATOR FIELD INSTALLATION:

WARNING: Removal of the bottom plug while under pressure
may cause bodily harm.

1 Depressurize and drain pipeline on both sides of valve.
2 Remove pipe plug in bottom boss of valve.
3 Inspect return flow rod and place in non-extended position. (The

rod should extend about 1" past end of brass bushing.) Apply
Teflon™ thread sealant to brass threads.

4 Insert threaded end of assembly into valve boss. Slowly turn

assembly into valve boss, taking care not to cross-thread
bushing. Continue turning assembly into valve for a tight fit.

RETURN FLOW ACTUATOR SEAL REPLACEMENT:

There are two parts (Rod Wiper and O-ring) on Return Flow Actuator
that are subject to wear. To replace seals, valve and pipeline must
first be depressurized and drained. Next, remove the return flow
assembly from the valve by turning brass bushing counter-clock­wise. Disassemble Return Flow Actuator as follows:

1 Remove one vinyl caps.
2 Remove T-Handle and jam nut from rod.
3 Remove rod from bushing by screwing in rod fully clockwise

and pull rod through valve end of bushing.

4 Lubricate two new seals with FDA approved grease such as

Lubriko #CW-606 and install in bushing end grooves. Note part

location on Fig. 3.
5 Clean, lubricate, and reinstall rod in bushing.
6 Re-install jam nut and T-Handle.
7 Place vinyl cap on handle.
8 Apply Teflon™ thread sealant to bushing and carefully thread

into valve taking care not to cross-thread bushing.

FIG. 3. BACKFLOW ACTUATOR ASSEMBLY

N-584 Flex Check Valve