Val-Matic Wastewater Air/Vacuum Valve - Manual (Page 3)

2
INSTALLATION
The installation of the valve is important for its
proper operation. The 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 for
in-plant installations. A shutoff valve should be
installed below the valve to allow regular
maintenance.
VALVE CONSTRUCTION
The standard Wastewater Air/Vacuum Valve
body and cover are cast iron. See specific
Materials List submitted for the order if other
than standard cast iron construction. All internal
metal components are stainless steel with the
exception of the seat, which is resilient. The
general details of construction for 1” through 3”
valves are illustrated in Figure 2. The general
details of construction for 4” through 8” are
illustrated in figure 3. The body (1) is threaded
or flanged for connection to the pipeline.
Table 1. Wastewater Air/Vacuum Valve Parts
List
Figure 2. 1”-3” Wastewater Air/Vacuum Valve
Figure 3. 4”-8” Wastewater Air/Vacuum Valve
Item Description Material
1 Body Cast Iron
2 Cover Cast Iron
4 Seat* Buna-N
5 Upper Float* Stainless Steel
5L Lower Float* Stainless Steel
6 Gasket* Non-Asbestos
7 Cover Bolt Alloy Steel
8 Retaining Screw Stainless Steel
9 Guide Bushing* Stainless Steel
15 Cushion* Buna-N
20 Guide Shaft* Stainless Steel
27 Washer* Stainless Steel
28 Pipe Plug Malleable Iron
*Recommended Spare Part
CAUTION: Install valve with “INLET”
port down or leakage will
occur.