BENDIX BW1432 Manuale Utente Scaricare il pdf (Pagina 1)

Bendix

R-6

™

Relay Valve

SD-03-1060

SERVICE

PORT

RELAY PISTON

DELIVERY

PORTS (4)

R-6

™

RELAY

VALVE INSERT

RETURN

SPRING

FIGURE 1

FIGURE 2

DESCRIPTION

The relay valve in an air brake system functions as a relay

station to speed up the application and release of the brakes.

The valve is normally mounted at the rear of the vehicle in

proximity to the chamber it serves. The valve operates as a

remote controlled brake valve that delivers or releases air to

the chamber in response to the control air delivered to it

from the foot brake valve or other source. The R-6

™

relay

valve is a piston operated valve. For ease of servicing, an

“insert” or “cartridge” type inlet/exhaust valve is employed.

This feature permits service of the inlet/exhaust valve without

line removal. The R-6

™

relay valve may be mounted directly

to or remotely from the reservoir which provides its supply

pressure. Standard porting consists of one (1) service port

and four (4) delivery ports. There are two (2) supply ports in

the reservoir mounted valve and one (1) supply port in the

remote mount valve.

OPERATION

APPLYING

Air pressure delivered to the service port enters the small

cavity above the piston and moves the piston down. The

exhaust seat moves down with the piston and seats on the

inner or exhaust portion of the inlet/exhaust valve, sealing

off the exhaust passage. At the same time, the outer or inlet

portion of the inlet/exhaust valve moves off its seat, permitting

supply air to flow from the reservoir, past the open inlet valve

and into the chambers.

BALANCED

The air pressure being delivered by the open inlet valve also

is effective on the bottom area of the relay piston. When air

pressure beneath the piston equals the service air pressure

above, the piston lifts slightly and the inlet spring returns

the inlet valve to its seat. The exhaust remains closed as

the service line pressure balances the delivery pressure.

(NOTE: Some valves are equipped with a piston return spring

which will assist the lifting of the piston). As delivered air

pressure is changed the valve reacts instantly to the change

holding the brake application at that level.

EXHAUST

SUPPLY

PORT

SUPPLY PORT

(RESERVOIR

MOUNT TYPE)

1 2 3 4 5 6

Sommario

Pagina 1 - Relay Valve

1®Bendix® R-6™ Relay ValveSD-03-1060SERVICEPORTRELAY PISTONDELIVERYPORTS (4)R-6™ RELAYVALVE INSERTRETURNSPRINGFIGURE 1FIGURE 2DESCRIPTIONThe relay val

Pagina 2 - REMOVING AND INSTALLING

2TYPICAL RELAY VALVE PIPING SINGLE CIRCUIT SYSTEMCOMPRESSOR GOVERNORSUPPLYRESERVOIRSERVICERESERVOIRBRAKEVALVERELAYVALVEBRAKECHAMBERSRELEASINGWhen air

Pagina 3 - PERSONAL INJURY OR DEATH:

3INSTALLINGClean air lines connecting to valve.Inspect all lines and/or hoses for damage and replace asnecessary.Install valve and tighten mounting bo

Pagina 4

42. Stop the engine and remove ignition key whenworking under or around the vehicle. Whenworking in the engine compartment, the engineshould be shut

Pagina 5

5COVERCAP SCREW (4)PISTON O-RINGRELAY PISTONEXHAUST SEATRETURN SPRINGBODYR-6 INSERTINLET & EXHAUST VALVEINLET & EXHAUSTVALVE BODYVALVE RETAINE

Pagina 6