Page 350 - The Tribology Handbook

C14 Total loss grease systems

TYPES OF TOTAL-LOSS GREASE SYSTEMS AVAILABLE

Suitable Typical
Description Diagram Operation Drive grease line Adjustability and typical
~VLGI~V~. pressures limiting Pipe lengths*

DIRECT FEED
Rotating cam or Motor
swash plate 700-2000 By adjustment of stroke
Individual piston operates each Machine 0-2 kN/m2 at each outlet
pumps piston pump (100-300 9--15 m
in turn Manual Ibf/in2) (30-50 ft)

Valve feeds out- Motor
Distributing piston put of a single 0-3 700-2000 None. Output governed
valve system piston pump Machine kN/mZ by speed of pump
to each line in 0-2 (100-300 25-60 m
turn Manual Ibf/in2) (80-200 ft)

Outputs of indi- Adjustment at eachout-
let/meter block
vidual pumps Motor 700-2800 18-54 m pump to
kN/mZ
Branched system split by 0 -3 (100-400 (60-180 ft)}divider
distributing Machine
valves Ibf/in2) 6-9 m wider
(20-30 ft) }:o bearing

INDIRECT FEED
PROGRESSIVE Valves work in
turn after each
Single line operation of
reversing reversing
valve R

First valve block
discharges in
the order 1, 2,
3, . . .i etc.
One unit of
this block is Normally none. Differ-
1 ent capacity meter
Single line used as a mas- valves available-
ter to set the
second block Motor 14 000- otherwise adjustment
in operation. 20 000 by time cycle
Second and Machine 0-2 kN/rn2
subsequent ~2000-3000 Main lines up to 150 m
blocks operate Manual Ibf/in2) (500 ft) depending on
sequentially grease and pipe size.
Feeder lines to bearings
Grease passes
through one 6-9 m (20-30 ft)
line and oper-
ates half the
total number
of outlets in
sequence.
Double line Valve R then
operates, re-
lieves line
pressure and
directs grease
to the other
line, operating
remaining
outlets
C14.1