Page 351 - The Tribology Handbook

Total loss qrease svstems C14

The line is alter-
INDIRECT nately pres-
FEED surised and re-
PARALLEL lieved by a
device on the
pump. Two Motor up to
variations of 17 000
this system kN/mZ
exist in which (2500 Operation frequency
1 injection is Ibf/in2) adjustable (some
Single line made by the 9- 1 makes). Output de-
pends on nature of
line pressure Manual up to
acting on a ilo(lsr grease
piston within kN/m2 120 m (400 ft)
the valves (1200
2 injection is Ibf/in2)
made by
spring pres-
sure acting on
a piston within
the valves

Pump charges
line and Motor up Full adjustment at
Single line oil or valves. Oil or with 40 000 meter valves and by
air actuated air pressure cycle 0-3 kN/mZ time cycle
operates timer (6000 600 m (2000 ft)
OILOR AIR valves Ibf/in2)
SUPPLY

Grease pressure
in one line op-
erates half the
total number As above.
of outlets si- uD to
multaneously.
Valve R then Motor
Double line 0-2
relieves line Manual (6000 i
pressure and
directs grease
to the other
line, operating
the remaining
outlets
* Lengths shown may be exceeded in certain specific circumstances.

Considerations in selecting type of system
___
Required performance of system
~__~_~____ _____
Type of bearing Grease supply reyuirements Likely system requirements
___~~ ..____.._____.~
Plain bearings, high loads Near-continuous supply Direct feed system
_____~__ ___
Roiling bearings Intermittent supply Indirect feed
__-__-_____- ______

C14.2