BENDIX PR-3 Manuale

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Bendix

PR-2

, PR-3

DESCRIPTION

The pressure protection valve is a normally closed, pressure

control valve which can be referred to as a non-exhausting

sequence valve. These valves are used in many different

applications. An example would be in an air brake system

to protect one reservoir, or reservoir system from another,

by closing automatically at a preset pressure should a

reservoir system failure occur. The valves can also be used

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PR-3

OR PR-4

PRESSURE PROTECTION VALVES

SPRING

SUPPLY

PORT

PR-4

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PRESSURE PROTECTION VALVE

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& PR-4

Pressure Protection Valves

CAP

PISTON

INLET

VALVE

DELIVERY

PORT

to delay filling of auxiliary reservoirs to insure a quick build-up

of brake system pressure.

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The PR-2

and PR-4

pressure protection valves have one

1/4" N.P.T.F. supply port and one 1/4" N.P.T.F. delivery port

which are identified. Both valves are provided with two 9/32"

mounting holes through the body. The closing pressure of

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the PR-2

valve is externally adjustable while the PR-4

valve has a fixed setting.

CAP

INLET

VALVE

SUPPLY

PORT

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PR-3

PRESSURE PROTECTION VALVE

PRESSURE

REGULATING

SPRING

EXHAUST

VENT

PISTON

O-RING

PISTON

SUPPLY

PORT

SPRING

RETAINER

INLET

VALVE

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PR-2

PRESSURE PROTECTION VALVE

SPRING

PISTON

CHECK

VALVE

DELIVERY

PORT

PISTON PLUG

O-RING

VALVE STEM

INLET

VALVE SPRING

DELIVERY

PORT

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