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At Sanrok we manufacture and supply Air Reservoirs for Air Brake
Systems.
An air reservoir for an air brake system is provided. The air
reservoir includes a housing that has a first air chamber, a
second air chamber, and a supply air chamber. A first valve is
disposed between the supply air chamber and the first air
chamber and is configured to allow air to flow from the supply
air chamber to the first air chamber. A second valve is disposed
between the supply air chamber and the second air chamber and is
configured to allow air to flow from the supply air chamber to
the second air chamber.
Design and Function
A compressed air brake system is divided into a supply system
and a control system. The supply system compresses, stores and
supplies high-pressure air to the control system as well as to
additional air operated auxiliary truck systems (gearbox shift
control, clutch pedal air assistance servo, etc.).
Supply system
The air compressor is driven off of the engine either by
crankshaft pulley via a belt or directly off of the engine
timing gears. It is lubricated and cooled by the engine
lubrication and cooling systems. Compressed air is first routed
through a series of cooling coils and into an air dryer. The
dryer device removes moisture and oil impurities and also may
include a pressure regulator and safety valve. As an alternative
to the air dryer, the supply system can be equipped with an anti
freeze device and oil separator. The compressed air is then
stored in a storage reservoir (also called a primary tank) from
which it is then distributed via way protection valves into the
front and rear brake circuit air tanks, parking brake air tank
and an auxiliary equipment air tank. The system also includes
various check, pressure limiting, drain and safety valves.
Control system
The control system is further divided into two service brake
circuits: the parking brake circuit and the trailer brake
circuit. This dual brake circuit is further split into front and
rear wheel circuits which receive compressed air from their
individual reservoirs for added safety in case of an air leak.
The service brakes are applied by means of a brake pedal air
valve which regulates both circuits. The parking brake is the
air operated spring brake type where its applied by spring force
in the spring brake cylinder and released by compressed air via
hand control valve. The trailer brake consists of a direct two
line system: the supply line (marked red) and the separate
control or service line (marked blue). The supply line receives
air from the prime mover park brake air tank via a park brake
relay valve and the control line is regulated via the trailer
brake relay valve. The operating signals for the relay are
provided by the prime mover brake pedal air valve, trailer
service brake hand control (subject to a country's relevant
heavy vehicle legislation) and the prime mover park brake hand
control.
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