Val-Matic 25 Air Release Valve (Simple Lever Type) - Manual (Page 4)

3
MAINTENANCE
The Air Release Valve requires no scheduled
lubrication or maintenance.
INSPECTION: Check outlet for water leakage. If
continuous water leakage occurs, valve
inspection and repair is needed.
TROUBLESHOOTING
Several problems and solutions are presented
below to assist you in troubleshooting the valve
assembly in an efficient manner.
• Leakage at Bottom Connection: Tighten valve
threaded connection. If leak persists, remove
valve and seal threads with thread sealant.
• Leakage at Cover: Tighten bolts per Table 2,
replace gasket.
• Valve Leaks when Closed: Flush valve to
remove debris. Disassemble and inspect seat,
orifice 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.
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.
Refer to Figure 2.
1. Close inlet shut-off valve. Loosen the cover
bolts (7) slowly on the top cover to release any
trapped pressure.
2. Remove cover bolts (7) and lift cover off valve
body.
3. Remove the 2 retainer rings (13) and pivot pin
(12) that pass through the lever frame (3).
The float (5) and float arm (10) will be free
from the cover. Disconnect float from float
arm (10).
4. To remove lever frame (3), remove hex-head
locator (21). Rotate seat (4) counter-
clockwise to remove.
5. Remove orifice button (11) from float arm (10).
6. Clean and inspect parts. Note: some floats
contain sand for extra weight; if water is
detected, replace float. Replace worn parts as
necessary.
REASSEMBLY
All parts must be cleaned and gasket surfaces
should be cleaned with a stiff wire brush in the
direction of the serrations or machine marks.
Worn parts, gaskets and seals should be
replaced during reassembly. Refer to Figure 2 on
page 2.
1. Assemble lever frame (3) to cover. Secure
with bolt (21) and washers (30).
2. Apply Loctite PST No. 565 thread sealant to
seat (4) and assemble to cover with maximum
torque of 10 ft-lbs; DO NOT OVER-TORQUE.
3. Install new orifice button (11) flush to arm (10).
4. Connect arm (10) to float (5) with retainer bolt
(17) and lockwasher (34). Install pivot pin (12)
and retaining rings (13); rings should snap
over pins.
5. Float should move freely pressing the orifice
button (11) against the seat (4) when pushed
upward. Verify that all retainer rings (13) are
properly secured.
6. Lay new cover gasket over body (1) and install
cover (2) over bolt holes in body (1).
7. Insert lubricated bolts (7) and tighten to 20 ft-
lbs.
8. Place valve back in service. Refer to the
Installation instructions on page 2. Slowly
open inlet isolation valve.
Table 2. Valve Cover Bolt Torques
Size Torque (Ft-lbs)
5/16” 20
3/8” 35