Val-Matic Wastewater Combination Air Valve - Manual (Page 3)

INSTALLATION
The installation of the valve is important for its
proper operation. Valves should 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.
3
CAUTION: Install valve with "INLET" port
down or leakage will occur.
VALVE CONSTRUCTION
The standard Wastewater Combination Air 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).
ITEM DESCRIPTION MATERIAL
1 Body Cast Iron
2 Cover Cast Iron
3 Baffle (1”-2”) Cast Iron
Baffle (3”-4”) Ductile Iron
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* SS and Buna-N
12 Pivot Pin* Stainless Steel
13 Retaining Ring* Stainless Steel
14 Pipe Plug Steel
15 Cushion* Buna-N
16 Plug Stainless Steel
17 Float Retainer* Stainless Steel
18 Lock Nut* Stainless Steel
20 Guide Shaft* Stainless Steel
28 Pipe Plug Malleable Iron
33 Clevis* Stainless Steel
34 Lock Washer* Stainless Steel
35 Guide Shaft Retainer* Stainless Steel
36 Pipe Plug Steel
*RECOMMENDED REPAIR PART KIT
TABLE 1. LIST OF PARTS
FIGURE 2. 1”-4” WASTEWATER COMBINATION
AIR VALVE