Air/Vacuum Valves


With Throttling Valve

 

Designed for deep well pump installations

Air/vacuum valves automatically exhaust large volumes of air a system being filled and also allow air to re-enter the pipe line when being emptied. In operation, when the system is filled, fluid reaches the float as the air is discharged and closes the orifice. The orifi ce will remain closed until the system pressure drops to near atmospheric pressure and the float is no longer buoyed.

These valves do not release air that accumulates while the system is fully pressurized and in operation. Use a straight air release valve for removing air while systems are pressurized. These air/vacuum valves have 316 stainless steel spherical floats which are designed to exhaust large amounts up to sonic velocity without blowing shut.

Air vacuum valves with throttling valves are commonly used on deep well turbine pump installations and are installed between the pump and the check valve. They purge air at start up prior to the check valve opening, and they break the vacuum when the pump shuts down and water drains into the well after the check valve closes. The throttling valve provides adjustable control of the rate and pressure at which air is discharged during filling.

Valves listed below have cast iron bodies, stainless steel and a Buna- N seat. Rated for 300 PSI WOG Additional sizes of air/vacuum valves are available through 16" as are flanged valves.

 
Pipe Size FNPT
Filling Rate
GPM @ 1 & 15 psi
Draining Capacity
SCFM @ 2" Hg & 10" Hg Vac
1/2"
137 / 278
19.6 / 75.2
3/4"
310 / 626
44.2 / 169
1"
550 / 1130
78.5 / 304
2"
2,200 / 4,500
314 / 1,217
3"
4,950 / 10,100
707 / 2,740
 

PURCHASE AIR/VACUUM VALVES

ITEM NUMBER DESCRIPTION PRICE

QTY VGA10132

Without Throttling Valve, Pipe Size FNPT: 1/2"
$190.09

QTY VGA10133

Without Throttling Valve, Pipe Size FNPT: 3/4"
$210.15

QTY VGA10134

Without Throttling Valve, Pipe Size FNPT: 1"
$232.12

QTY VGA10135

Without Throttling Valve, Pipe Size FNPT: 2"
$400.24

QTY VGA10136

Without Throttling Valve, Pipe Size FNPT: 3"
$565.49

QTY VGA10138

With Throttling Valve, Pipe Size FNPT: 1/2"
$339.10

QTY VGA10139

With Throttling Valve, Pipe Size FNPT: 3/4"
$364.90

QTY VGA10140

With Throttling Valve, Pipe Size FNPT: 1"
$386.87

QTY VGA10141

With Throttling Valve, Pipe Size FNPT: 2"
$581.73

QTY VGA10142

With Throttling Valve, Pipe Size FNPT: 3"
$912.24