 |
The Inbal Preaction System employs a piping system with closed
sprinklers pressurized with supervisory air or gas pressure.
The system is equipped with a supplemental detection system
whose function varies depending on the type of preaction system.
The types of detection systems most commonly used are pneumatic
or electric actuation. Preaction systems are used where it is
important to prevent an accidental discharge of water, when
an alarm is desired in advance of sprinkler operation, or when
it is desired to reduce the water delivery delay inherent in
a dry pipe system.
Inbal Preaction Systems are available in the following
configurations:
 Non-Interlock
- Utilizes a dry pipe valve and a supplemental pneumatic or
electric detection system. The valve may be opened either
by operation of a sprinkler in the sprinkler piping or by
operation of the detection system.
Single
Interlock - Utilizes a deluge valve and a supervisory air
pressure system. Loss of air in the sprinkler piping system
due to damaged piping or broken sprinklers will only operate
the alarm systems and will not cause water to flow through
the deluge valve and into the system. The valve will open
only if the electric or pneumatic detection system operated.
Double
Interlock - Utilizes an automatic water control valve, an
electric or pneumatic detection system, and a pressurized
(air or gas) sprinkler piping system. Only operation of both
detection and sprinkler piping systems will allow water to
enter the sprinkler system and be discharged through the fused
sprinkler(s). The valve is FM approved to 300 psi (21 bar)
in sizes 3", 4", 6", and 8" (80, 100,
150, & 200 mm) as a valve for Refrigerated Areas.
|
