CLA-VAL 34AR Series Manuel utilisateur

34AR

INTRODUCTION

Cla-Val Air Release Valves (ARVs) are built with stainless

steel trim to insure years of maintenance free service on

water systems. ARVs are float operated and have a

resilient orifice button for water tight shut off. Model num-

ber and working pressure (psi) are shown on the metal tag

on each ARV. According to AWWA Std’s C512-92

ote: These ARVs are not recommended for raw sewage

use or fluids containing a major percentage of suspended

solids. For this service use Series 34WW ARVs.

RECEIVING AND STORAGE

Upon receipt inspect shipment for damage, ARVs should

remain boxed until they are ready to be installed.

DESCRIPTION OF OPERATION

ARVs operate automatically to release pockets of air from

high points of water system (See fig. 1 & 2). ARVs are ini-

tially normally open and will vent air thru the orifice as the

water system is filled with fluid. As the fluid level rises in the

ARV so does the float to shut off the orifice. Subsequently

as air in the system collects in the ARV, the fluid is dis-

placed, allowing the float to drop, opening the orifice and

the collected air pocket is vented. The cycle is continually

repeated automatically, as air collects in the ARV.

INSTALLATION

ARV must be installed vertically in each high point for prop-

er operational performance. Pipeline installations may

require a valve vault or freeze protection. When ARVs shut

some fluid may spill, therefore piping the outlet to a drain is

recommended particularly in a pump room. A shut off valve

could be installed at the ARV inlet for servicing.

SERIES

INSTALLATION / OPERATION / MAINTENANCE

SIMPLE & COMPOUND LEVER AIR RELEASE VALVE

Fig. 2

Fig. 1

Open Position

Simple Lever

ARV

Open Position

Compound Lever

ARV

CONSTRUCTION MATERIALS

Standard materials of construction are listed in Tables below for Simple and Compound Level ARVs.

All internal componets are stainless steel with the exception of the orifice button.

General details of construction are illustrated in Figure 2. The body (1) is threaded for connection to the pipline. The seat

(4) is threaded into the cast cover (2).

OUTLET

PIPE PLUG

OPTIONAL

4 3/4"

INLET

5 1/4"

TEST PRESSURE

1.5 TIMES

WORKING PRESSURE

INLET

OUTLET

TEST PRESSURE

1.5 TIMES

WORKING PRESSURE

10"

Item Description

1 Body

10 Float Arm*

2 Cover

11 Orifice Button*

3 Lever Frame*

12 Pivot Pin*

4 Seat*

13 Pin Retainer*

5 Float*

17 Float Retainer*

6 Gasket*

21 Locator*

7 Cover Bolt

34 Lock Washer*

Item Description

1 Body

13 Retaining Ring*

2 Cover

14 Pipe Plug

3 Lever Frame*

17 Float Retainer*

4 Seat*

18 Lock ut*

5 Float*

19 Link*

6 Gasket*

21 Locating Pin*

7 Cover Bolt

22 Orifice Button Arm*

8 Retaining Screw*

30 Washer*

10 Float Arm*

33 Clevis*

11 Orifice Button*

34 Lock Washer*

12 Pivot Pin*

*Recommended Repair Part Kit

Figure 2. Simple Lever Air Release Valves

Figure 2. Compound Lever Air Release Valves

PARTS LIST

MAINTENANCE

The simple and compound Air Release Valves (ARV)

require no regular lubrication or maintenance.

A Periodic inspection to verify operation can be performed.

A manual drain valve can be installed in place of the lower

drain plug (14 - Fig. 2) to perform this operation as shown in

Figure 3.

1. Partially open inlet shut off valve until water flow is

visible. This will indicate the ARV is working properly. If

only air flow observed is follow steps 2-6.

2. Close inlet shut-off valve.

3. Slowly open drain valve to allow fluid in ARV to drain. If

draining is difficult, the orifice may be clogged (valve

requires service).

4. Close drain valve.

5. Slowly crack open inlet shut-off valve to fill ARV with fluid.

Observe the seating action and verify that valve closes

without leakage.

6. If leakage occurs, remove ARV to inspect internals for

wear or damage from foreign objects.

PROBLEMS

Solutions, presented below, will assist you troubleshooting

the ARV assembly in an efficient manner.

•Leakage at Inlet Connection: Tighten valve threaded

connection. If leaks persists, remove valve and seal

threads with pipe sealant.

•Leakage at Cover: Tighten bolts per Table 2, or replace

cover gasket.

•ARV Leaks when Closed: Flush ARV to remove debris.

Disassemble and inspect seat, orifice button, for damage

and float for water content.

•ARV not Venting Air: Check that system operating

pressure does not exceed Working Pressure on ARV

nameplate. Inspection per steps 2-6 and disassemble

valve if problems persists.

DISASSEMBLY

Work on the ARV Should be one by a Qualified Mechanic

The ARV can be disassembled without removing it from the

pipeline. Or for the ARV can be removed from the line. o

special tools are required to make repairs.

1. Close inlet shut-off valve. Open drain valve or slowly remove

drain plug. Remove the cover bolts (7) from top cover

2. Pry cover (2) loose and lift off ARV body.

3. Remove the 2 retainer rings (13) and pivot pins (12) that

pass through the lever frame (3). The float (5) and linkage will

be free from the cover. Disconnect float from lever (10).

4. To remove lever frame (3), remove two rounded-head

fasteners (8). Rotate seat (4) counter-clockwise to remove.

5. Remove locknut (18) and orifice button (11) from orifice

button arm (22).

6. Clean and inspect parts. ote: some floats contain sand

for required weight; if water is detected, replace float.

Replace worn parts as necessary and lubricate parts with

food grade grease.

WARNING: The valve must be depressurized

before taking the over off.

OUTLET

Can be installed on

Compound Lever Only

Drain

Valve

Can be installed on

Simple and Compund

Lever ARV

Inlet

Shut-Off

Valve

FIG. 3 INSPECTION

REASSEMBLY

Clean all parts and gaskets surfaces with a wire brush in the

direction of the serrations or machine marks. Replace worn

parts, gaskets and seals before reassembly. Refer to Figure 2.

1. Apply Loctite PST o. 565 thread sealant to seat (4) and

screw into cover with maximum torque of 20 ft-lbs;

DO NOT OVER-TORQUE.

2. Screw down lever frame (3) to cover, over locating pin (21)

in cover, with screws (8) and washers (30).

3. Install new orifice button (11) flush to arm (22). Assemble

lockwasher (34) and locknut (18) over orifice button but do

not tighten. (see 5)

4. Connect arms (10 & 22) and assemble to lever frame (3) with

four pivot pins (12) and retaining rings (13); rings should

snap over pins.

5. Adjust orifice button (11) so that orifice button arm (22)

slopes up about 1/16” when resting gently against seat (4) as

shown in Figure 4. Secure button by tightening lockwasher

(34) and nut (18).

6. Attach float (5) by installing last pivot pin (12) into lever frame

(3). Float should lift freely pressing the orifice button (11)

against the seat (4) when pushed upward. Verify that all

retainers rings (13) are properly secured.

7. Lay new cover gasket (6) on clean surface and apply a

gasket compound such as Garlock 101-S to both surfaces.

Assemble gasket (6) and cover (2) over bolt holes in body (1).

8. Lubricate bolts (7) and tighten to the torques in Table 2.

9. Install ARV back in service. Refer to installation instructions.

Slowly open inlet shut-off valve. Valve is now back in

operation mode.

For above parts description and recommended spare parts kit see page 2

PARTS AND SERVICE

Parts and service are available from Cla-Val agent or distributor

or the factory.

ote the ARV Model o. and Working Pressure are on the ARV

nameplate. 3/2011

SIZE

1/4”

5/16”

3/8”

7/16”

1/2”

7/8”

TORQUE (FT-LBS)

202

1/16"

18 3

OUTLET

CLA-VAL

1701 Placentia Ave •Costa Mesa CA 92627 •Phone: 949-722-4800 •Fax: 949-548-5441 •E-mail: [email protected] •www.cla-val.com

•

Printed in USA

•

Specifications subject to change without notice.

-Air Release Valve 34AR (R-01/2018)

Figure 4. C mp und Lever ARV mechanism

f r Orifice Butt n Adjustment

Ce manuel convient aux modèles suivants

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