Cla-Val 36 Series User Manual

Page 7

Adjust orifice button so that when it is in light contact with the
plug stem, the arm (10) slopes away from the cover about
1/15”. Lock orifice button with lock nut (18).

Install new cushion (15) with fastener items (29, 30, 34, &
18).

Lay new cover gasket on clean surface and apply a gasket
compound such as Permatex #80065 to both surfaces.
Assemble gasket (6) and cover (2) over bolt holes in body
(1).

Insert lubricated bolts (7) and tighten to the torques listed in
Table 2.

Place valve back in service. Slowly open inlet isolation valve.

BOLT SIZE

7/16”-14

1/2”-13

5/8”-11

3/4”-10

7/8”-9

TORQUE (FT. LBS.)

30
45
93

150
200

TABLE 2. VALVE COVER BOLT TORQUES

PARTS AND SERVICE

Parts and service are available from your local representative or
the factory. Make note of the valve Model No. and Working
Pressure located on the valve nameplate.

N-Air Valve Custom Combination (R-11/01)

TROUBLESHOOTING

Several problems and solutions are presented below to assist
you in troubleshooting the valve assembly in efficient manner

Leakage at Bottom Connection:
Tighten valve threaded connection. If leaks persist, remove valve
and seals threads with pipe sealant or tape.

Leakage at Cover:
Tighten bolts per Table 2, replace gasket.

Valve Leaks when Closed:
Flush valve to remove debris. Disassemble and inspect seat, ori-
fice button and float. NOTE: Many floats contain sand for weight
but if water is detected replace float.

Valve not venting Air:
Check that operating pressure does not exceed Working
Pressure on nameplate. Perform inspection steps 2-6 and dis-
assemble valve if problem persists.

DISASSEMBLY

The valve can be disassembled without removing it from the
pipeline. Or 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. No special tools are required.

CAUTION:

The valve must be drained before removing the
cover or pressure may be released causing injury.

Close inlet shut-off valve. Slowly open drain valve or remove
drain plug. Remove the covers bolts (7) on the top cover.

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

Remove the retainer ring (13) and pivot pin (12) that pass
through the float arm (10).

To remove baffle (3), remove fasteners (8).

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

Clean and inspect parts. Note: some floats contain sand for
extra weight; if water is detected, replace float. Replace
worn parts as necessary and lubricate parts with FDA grease
such as Lubriko #Cw-606. Remove all foreign matter from
body and cover.

REASSEMBLY

All parts must be cleaned and gaskets surfaces should be
cleaned with a stiff wire brush in the direction of the serrations or
machine marks. Worn parts, gaskets and seal should be
replaced during reassembly. Refer to Figure 6.

Apply Loctite Primer and 680 Compound to float threads and
assemble to arm (10). Apply Loctite to bushing (9) and install
into baffle (3).

Lay cover on flat surface with outlet faced down. Lay seat
(4), plug (16), and baffle (3) over cover with screws (8) loose-
ly engaged. Verify that plug moves up and down freely. Lift
plug and drop into seat until baffle is positioned and plug
contacts seat smoothly; tighten screws to 5-10 ft. lbs.

Screw new orifice button (11) into arm (10) with lockwasher
(34) and locknut (18). Do not tighten nut at this time.

Connect arm (10) to baffle (3) with pivot pin (12) and retain-
ing rings (13).