Toro Air Release Valves Specifications

Micro-Irrigation

1/2"
Vacuum
Breaker

1" & 2"

Continuous

Acting Air

Release

Valves

1"
Plastic
Air Vent

Air/Vacuum Valves

Air and vacuum control is essential to the safety,
longevity, efficiency, and performance of an
irrigation system. Air must be allowed to exit
pipelines 1) upon startup to prevent water
hammer, 2) during normal operation to prevent
the development of air pockets, and 3) air must be
allowed to enter pipelines and laterals at shut down
to prevent vacuum suction. Various types of valves
and vents are available to perform these functions.

Application:

Removal of Air from Pipelines

• Avoid Water Hammer: Air must be allowed
to escape pipelines at the same rate as water
enters the pipeline during system startup to
avoid dangerous water hammer from
occurring.

• Remove entrained or dissolved air:
Air that has accumulated at high points
during system operation must be allowed to
escape to avoid air pockets which restrict the
flow of water and can cause water hammer.

1" & 2"

Air

Release

and

Vacuum

Relief

Valves

2", 3" & 4" Aluminum Air Vents

Allow the Entry of Air into Pipelines

• Prevent Vacuum Suction in Pipelines:
Air must be allowed to re-enter main and
submain pipelines as water drains during
system shut down to prevent negative
suction from occurring and potential
collapse of the pipelines.

• Prevent Vacuum Suction in Laterals:
Laterals which are buried or submerged in
water may ingest dirty water and/or soil
through the emitters as a result of vacuum
suction if air is not allowed to enter the
laterals during system shut-down and
drainage.

Continuous Acting Air Release Valves

1" & 2" Combination Large Volume Air Relief and Continuous Acting Air Release & Vacuum Relief Valve

• Install at highest points on filter and pump stations to provide both instantaneous and continuous
air relief

• Install on main manifolds every 1000 feet to introduce air into the irrigation system at shutdown to
prevent pipe collapse

• Install at highest point of slope to provide vacuum relief at system shutdown

Model #ARV-1-A

Model #ARV-2-KA

Specifications

Part Number ARV-1-A ARV-2-KA

Valve Type

Connection - male NPT (in) 1 2

Working Pressure (psi) 170 225

Sealing Pressure (psi) 3 3

Volume of air release without valve closing
and without the presence of water (CFM)

Release Air Volume @ 5 psi 8.8 CFM 140 CFM

Units per Box 20 8

Box Weight (lbs) 15 16

Packing Dimensions (in) 15" x 11" x 8"

Single Acting

Continuous

41.2 590

Dual Acting
Continuous

Unit Glossary:

CFM Cubic Feet per Minute

PSI Pounds per Square Inch

m3/h Cubic Meters per Hour

in Inches

1 Cubic Foot of Water = 7.48 Gallons