Bendix

RV-4

™

Pressure Reducing Valve

SD-03-3520

FIGURE 1

GENERAL DESCRIPTION

The RV-4

™

pressure reducing valve is a normally open

pressure control device. The function of the RV-4

™

valve is

to reduce system air pressure and maintain a constant

specified pre-set pressure below that of system pressure.

Various pressure settings can be obtained through the use

of springs and shims in combination.

The RV-4

™

valve has one supply port and two delivery ports.

A single pipe plug is installed in the control port and should

remain in place.

OPERATION

The spring force exerted on the balance piston determines

the delivery pressure of the valve. With no air pressure

present at the supply port, the inlet valve is unseated and

open while the exhaust passage through the center of the

control piston is sealed by the exhaust valve. Compressed

air entering the supply port flows past the open inlet valve,

around the balance piston and out the two delivery ports.

When air pressure on the balance piston overcomes spring

force, the piston moves and the valve spring forces the inlet

valve on its seat, closing off the supply of air. The exhaust

remains closed. If air pressure in the delivery line drops,

spring force under the balance piston overcomes air

pressure. Subsequent piston movement will unseat the inlet

valve allowing additional air pressure into the delivery lines.

If pressure in the delivery lines exceeds the pressure setting

of the valve, the force exerted by the air pressure will be

greater than the spring force. The balance piston will move

away from the exhaust valve, permitting air to flow past the

exhaust valve, through the hollow piston stem and out the

exhaust port. The inlet valve will remain closed.

MOUNTING

HOLE (2)

EXHAUST

CONTROL

PORT

(PLUGGED)

DELIVERY (2)

SUPPLY

PORT

BALANCE

PISTON

SPRINGS

DELIVERY

PORT (2)

SUPPLY

PORT

BALANCE

PISTON

CONTROL

PISTON

CONTROL

PORT

(PLUGGED)

EXHAUST

SPRING

SHIMS

EXHAUST PASSAGE

VALVE

SPRING

1 2 3 4

Résumé du contenu

Page 1 - Pressure Reducing Valve

1®Bendix® RV-4™ Pressure Reducing ValveSD-03-3520FIGURE 1GENERAL DESCRIPTIONThe RV-4™ pressure reducing valve is a normally openpressure control devic

Page 2 - PERSONAL INJURY OR DEATH:

2PREVENTIVE MAINTENANCEImportant: Review the Bendix Warranty Policy beforeperforming any intrusive maintenance procedures. A warrantymay be voided if

Page 3 - REDUCING VALVE

3FIGURE 24. Remove large retaining ring from body (8) and removeinlet/exhaust valve assembly (9).5. Remove retaining ring from inlet/exhaust valve ass

Page 4

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