Weir SPM QWS 2500 XL, Инструкция по эксплуатации и руководство по обслуживанию, Страница: 26 / 44

26 of 44
Document P/N: 2P137414
Release Date: 05/29/2017
Revision: IR
3. Lube Pump:
A. Must be a gear type pump rated at 50 GPM minimum at its installed maximum engine RPM .
B. Inlet and outlet ports should be as large as possible w/1½” inlet and 3/4” outlet preferred.
NOTE: IF THE GEAR PUMP SUCTION INLET PORT IS SMALLER THAN 1½”, A SWAGE CONNECTION
SHOULD BE USED ON THE SUCTION PORT IN ORDER TO MAINTAIN A 3” SUCTION LINE SIZE AS NEAR
THE GEAR PUMP AS POSSIBLE.
C. A liquid filled vacuum gauge (0 to 30in Hg) should be installed as near the gear pump suction port
as possible in order to monitor the suction flow conditions, especially during cold startups in cold
weather.
D. The gear pump may be direct coupled to an accessory drive location on the engine or can be direct
coupled to the transmission with a pump-mount type power take-off (PTO). The transmission/PTO
mount usually offers the advantage of a lower mounting and improved suction conditions. The lube
pump mounting must be a direct coupled positive drive arrangement which operates at engine
speed whenever the plunger pump's prime mover is running.
4.
Lube System Pressure Lines and Oil Filter:
A. Pressure lines must be 1" I.D. minimum in order to maintain a flow a velocity of 10 to 12 ft. per
second maximum.
B. Pressure lines should be wire reinforced with a minimum working pressure of 800 PSI.
C. The oil filter must be rated at 50 GPM/200 PSI minimum, must have a built-in 15 to 25 PSI relief
valve, and 25 to 40 micron elements. The filter should be a canister enclosed throw-away element
type. The Parker 60 series filter is widely used and acceptable. The filter must be located in an
easily serviceable location and a built-in bypass indicator (service indicator) is recommended. A
dual element filter rated at more than 50 GPM will decrease the pressure drop associated with
filtering the power end oil and will increase the time interval required between filter element
changes. An external relief valve should never be used to protect the filter.
D. A liquid filled 0 to 200 PSI oil pressure gauge must be located at the 1/2” NPT lube inlet on the
plunger pump. An auxiliary oil pressure gauge is also highly recommended for those units having
remote control consoles.
5.
Lube System Relief Valve and Relief Return Line:
A. The system relief valve should be a 1” 20 to 25 GPM, 60 PSI minimum/225 maximum, adjustable
non-chattering type relief valve.
B. The relief valve should be located at the plunger pump's lube port opposite the lube inlet to insure
oil flow throughout the plunger pump before reaching the relief valve.
C. The relief return line should be 1” I.D. minimum, wire reinforced, rated at 800 PSI minimum
operating pressure; and should return directly to the reservoir. The return line port should be
opposite the suction line outlet port on the power end lube oil tank.