Air Maintenance Device
For Dry Pipe Sprinkler Systems,
Air Supervised Preaction Systems, &
Dry Pilot Actuated Deluge Systems
or visit our website for information on these and all of our products
The enclosed Automatic Air Maintenance Device is a UL
Listed and FM Approved assembly of valves, nipples,
fittings, and actuators to automatically control the air
pressure in the piping of dry pipe sprinkler systems,
preaction sprinkler systems, or dry pilot actuated deluge
The Air Maintenance Device is designed to automatically
feed air into the system piping at the required volume and
pressure from an air source such as:
An air compressor
An air receiver tank
A plant air system (owner's air)
When an air receiver tank or plant air is utilized as the air
supply source, the pressure regulator in the Air
automatically regulates the air pressure to the
designated level. The outlet pressure of the regulator is
When an electrically-driven air compressor is utilized as
the air supply source, the pressure switch in the Air
Maintenance Device AMD-2, AMD-2ALT and AMD-3
automatically causes the air compressor to cut-in or
cut-out at the minimum and maximum air pressures
desired, respectively. The cut-in and cut-out pressures
are field adjustable.
The automatic air supply is directed through a restricted
orifice in the air maintenance device so that upon
activation of a sprinkler, the air supply will not interfere
with the operation of the dry pipe valve, by continuing to
supply high volumes of pressurized air to the piping
It is a recommended safeguard that a low pressure switch
and alarm be installed on dry pipe systems or other air
supervised piping systems. This will cause an alarm to
sound if the pressure falls below a predetermined level.
UL Listed and FM Approved
Manufactured by: General Air Products, Inc.
118 Summit Drive, Exton, PA 19341
The Air Maintenance Device provides a continuous but
restricted air supply to the piping system.
The activation of only one sprinkler in a dry pipe system,
will cause the system pressure to diminish to the point
where the dry pipe valve will "trip", thereby filling the
system piping with water.
Small piping system air leaks will be compensated for by
the automatic air feed provided the air leaks do not
exceed the restricted air supply.
Model: AMD-1, AMD-1ALT; AMD-2, AMD-2ALT; AMD-3
Style: With Air Regulator (AMD-1, AMD-1ALT)
With Air Pressure Switch (AMD-2, AMD-2ALT,
Factory Operation Test:
100% at 35 psi air (AMD-1, AMD-1ALT)
100% at 30 & 40 psi air (AMD-2, AMD-2ALT,
Mfgr. Source: General Air Products, Inc.
When placing an order, indicate the full product name.
Please specify the quantity, model and style.
General Air Products, Inc. will repair and/or replace any
products found to be defective in material or
workmanship within a period of one year from the date of
shipment. Please refer to the current price list for further
details of the warranty.
7 lbs. (AMD-1, AMD-1ALT)
11 lbs. (AMD-2, AMD-2ALT, AMD-3)