Val-Matic 38 Series User manual

Manual No.
ARCL-OM1-2
Air Release Valve
Series 38, 45, 50
(Compound Lever Type)
Operation, Maintenance and
Installation Manual
INTRODUCTION............................................ 1
RECEIVING AND STORAGE ........................ 1
DESCRIPTION OF OPERATION................... 1
INSTALLATION............................................. 2
VALVE CONSTRUCTION.............................. 2
MAINTENANCE............................................. 3
TROUBLESHOOTING................................... 3
DISASSEMBLY ............................................. 3
REASSEMBLY .............................................. 4
PARTS & SERVICE....................................... 4
WARRANTY .................................................. 5
VAL-MATIC
®
VALVE AND MANUFACTURING CORP.
905 Riverside Dr. ●Elmhurst, IL 60126
Phone [phone] ●Fax [phone]
www.valmatic.com

1
VAL-MATIC'S AIR RELEASE VALVE
(Compound Lever Type)
OPERATION, MAINTENANCE AND INSTALLATION
INTRODUCTION
This manual will provide you with the information
to properly install and maintain the valve to
ensure a long service life. The Air Release
Valve has been designed with stainless steel
trim to give years of trouble-free operation. The
Air Release Valve is typically mounted at the
high points in a piping system to automatically
remove pockets of air as they accumulate. The
valve can also be used to slowly release air in
tanks and pump casings.
Note: This valve is not intended for fluids
containing suspended solids such as
wastewater. For wastewater and other high
turbidity applications, use Val-Matic Series 48A
& 49A Sewage Air Release Valves.
The valve is a float-operated, resilient-seated
valve designed to handle clean fluids. The
Maximum Working Pressure and Model No. are
stamped on the nameplate for reference.
Note: Low Durometer seats are available for low
pressure applications.
RECEIVING AND STORAGE
Inspect valves upon receipt for damage in
shipment. Handle all valves carefully without
dropping. Valves should remain boxed, clean
and dry until installed to prevent weather related
damage. For long term storage greater than six
months, the valve must remain in the box and
stored indoors. Do not expose valve to sunlight
or ozone for any extended period.
FIGURE 1. Compound Lever AIR RELEASE
VALVE
DESCRIPTION OF OPERATION
The Air Release Valve is designed to
automatically remove air pockets at the high
points in a piping system. The valve, as
shipped, is a normally open valve and will slowly
vent air through the top orifice. As fluid enters
the valve, the float will rise, closing the orifice.
As air accumulates in the piping system and
enters the valve, the float drops allowing the
venting orifice to open.
The lever mechanism provides mechanical
advantage for the float. During system
operation, the pipeline pressure exerts a strong
upward force on the sealing component, the
orifice button. The lever mechanism magnifies
the weight of the float so that the orifice will open
under high pipeline pressures. Additional ports
are provided for flushing, testing and draining
purposes.
CAUTION
This valve is not intended for fuel service
or fluids containing suspended solids.

2
INSTALLATION
The installation of the valve is important for its
proper operation. Valves must be installed at
the system high points in the vertical position
with the inlet down. For pipeline service, a vault
with freeze protection, adequate screened
venting, and drainage should be provided.
During closure, some fluid discharge will occur
so vent lines should extend to an open drain
area in plant service. A shut-off valve should be
installed below the valve in the event servicing is
required.
VALVE CONSTRUCTION
The standard Air Release Valve body and cover
are cast iron. See the specific Materials List
submitted for the order if other than standard
cast iron construction. All internal components
are stainless steel with the exception of the
orifice button which is resilient. The general
details of construction are illustrated in Figure 2.
The body (1) is threaded for connection to the
pipeline. The seat (4) is threaded into the cast
cover (2).
TABLE 1. AIR RELEASE VALVE PARTS LIST
x
ITEM DESCRIPTION MATERIAL
1 Body Cast Iron
2 Cover Cast Iron
3 Lever Frame* Stainless Steel
4 Seat* Stainless Steel
5 Float* Stainless Steel
6 Gasket* Non-Asbestos
7 Cover Bolt Alloy Steel
8 Retaining Screw* Stainless Steel
10 Float Arm* Stainless Steel
11 Orifice Button* Buna-N
12 Pivot Pin* Stainless Steel
13 Retaining Ring* Stainless Steel
14 Pipe Plug Iron
17 Float Retainer* Stainless Steel
18 Lock Nut* Stainless Steel
19 Link* Stainless Steel
21 Locating Pin Stainless Steel
22 Orifice Button Arm* Stainless Steel
30 Washer* Stainless Steel
33 Clevis* Stainless Steel
34 Lock Washer* Stainless Steel
*RECOMMENDED REPAIR PART KIT
FIGURE 2. Compound Lever AIR RELEASE VALVE
CAUTION
Install valve with "INLET" port down or
leakage will occur.

3
MAINTENANCE
The Air Release Valve requires no scheduled
lubrication or maintenance.
INSPECTION: Periodic inspection to verify
operation can be performed. A manual drain valve
can be installed in the lower drain plug to perform
this operation as shown in Figure 3.
FIGURE 3. Inspection Piping
1. With the inlet shutoff valve open, partially
open the drain valve until flow can be heard.
If the air valve is working properly, water
should be exhausted from the drain valve. If
air is exhausted, follow steps 2-6.
2. Close the inlet shutoff valve.
3. Slowly open the drain valve to allow the fluid
in the valve to drain.
4. Close the drain valve.
5. Slowly open the inlet shutoff valve to fill the
valve with water. Observe the seating
action and verify that the valve closes
without leakage.
6. If leakage occurs, the valve should be removed
and inspected for wear or possible damage from
foreign matter.
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. Perform inspection steps 2-6 and
disassemble 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.
1. Close inlet shut-off valve. Open drain valve or
remove drain plug. Remove the cover bolts (7)
on the top cover.
2. Pry cover (2) loose and lift off valve 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).
WARNING
The valve must be drained before
removing the cover or pressure may be
released causing injury.

4
SIZE TORQUE (FT-LBS)
7/16" 30
1/2" 45
7/8" 202
DISASSEMBLY (Cont'd)
4. To remove lever frame (3), remove two
round-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. 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. Apply Loctite PST No. 565 thread sealant to
seat (4) and assemble to cover with
maximum torque of 20 ft-lbs; DO NOT
OVER-TORQUE.
2. Assemble lever frame (3) to cover over
locating pin (21) in cover. Secure 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.
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 move freely
pressing the orifice button (11) against the
seat (4) when pushed upward. Verify that all
retainer rings (13) are properly secured.
7. Assemble gasket (6) and cover (2) over bolt
holes in body (1).
8. Insert lubricated bolts (7) and tighten to the
torques listed in Table 2.
9. Place valve back in service. Refer to the
Installation instructions on page 2. Slowly
open inlet isolation valve.
TABLE 2. VALVE COVER BOLT TORQUES
FIGURE 4. ORIFICE BUTTON ADJUSTMENT
(See REASSEMBLY, Step 5)
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 and contact:
Val-Matic Valve and Mfg. Corp.
905 Riverside Drive
Elmhurst, IL 60126
Phone: [phone]
Fax: [phone]
www.valmatic.com
A sales representative will quote prices for parts
or arrange for service as needed.

5
VAL-MATIC
®
VALVE AND MANUFACTURING CORP.
905 Riverside Dr. ●Elmhurst, IL 60126
Phone [phone] ●Fax [phone]
www.valmatic.com
LIMITED WARRANTY
All products are warranted to be free of defects in material and workmanship for a period of one year from the date of
shipment, subject to the limitations below.
If the purchaser believes a product is defective, the purchaser shall: (a) Notify the manufacturer, state the alleged defect
and request permission to return the product; (b) if permission is given, return the product with transportation prepaid. If
the product is accepted for return and found to be defective, the manufacturer will, at his discretion, either repair or replace
the product, f.o.b. factory, within 60 days of receipt, or refund the purchase price. Other than to repair, replace or refund
as described above, purchaser agrees that manufacturer shall not be liable for any loss, costs, expenses or damages of
any kind arising out of the product, its use, installation or replacement, labeling, instructions, information or technical data
of any kind, description of product use, sample or model, warnings or lack of any of the foregoing. NO OTHER
WARRANTIES, WRITTEN OR ORAL, EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF FITNESS FOR A
PARTICULAR PURPOSE AND MERCHANTABILITY, ARE MADE OR AUTHORIZED. NO AFFIRMATION OF FACT,
PROMISE, DESCRIPTION OF PRODUCT OF USE OR SAMPLE OR MODEL SHALL CREATE ANY WARRANTY FROM
MANUFACTURER, UNLESS SIGNED BY THE PRESIDENT OF THE MANUFACTURER. These products are not
manufactured
,
sold or intended for
p
ersonal
,
famil
y
or household
p
ur
p
oses.