Weir SPM QWS 2500 XL, Инструкция по эксплуатации и руководство по обслуживанию, Страница: 27 / 44

27 of 44
Document P/N: 2P137414
Release Date: 05/29/2017
Revision: IR
6. Lube Drain Lines (from plunger pump to reservoir):
A. The SPM
®
QWS 2500 XL is equipped with a 2” NPT drain port in the speed reducer (gearbox)
housing and a 3” or 4” NPT drain ports in the bottom of the power end housing. The drain lines
should never be smaller than the drain port in the power end/speed reducer and should be as short
as possible. The drain lines should be free of excessive bends and kinks and should flow
continuously downhill to the reservoir. If necessary, the 2” drain line from the speed reducer can be
teed into a common 3” drain line returning to the reservoir. The lowest 2” NPT drain port in the
speed reducer should always be utilized for the drain line in order to prevent the gear box from
accumulating excess oil.
B. A 0 to 250
o
F oil temperature gauge should be installed in the primary drain line such that its sensor
will be submerged in the return oil from the plunger pump. The temperature gauge should also be
located in a place easily accessible for viewing. An auxiliary oil temperature gauge is also highly
recommended for those units that have a remote control console.
7.
Optional Lube System Equipment:
A. In extremely hot ambient conditions, an oil cooler may be required to prevent excessive oil
temperatures and inadequate oil viscosity. When used, the oil cooler should be of the “air to oil” or
“forced air” type and should be located down-stream from the oil filter. The cooler should be rated
at 80 GPM/300 PSI minimum, and should have 2” minimum inlet and outlet connections. If the well
service unit will also be subjected to periods of cold weather, the oil cooler must be plumbed in a
manner that will allow the oil to bypass the cooler when cold ambient conditions occur.
B. In extremely cold ambient conditions, the use of either an electric sump heater or a “tube and shell”
heat exchanger may be required to prevent poor lube suction oil conditions, lube pump damage,
and plunger pump damage due to the lube oil becoming too cold and viscous to flow properly.
When used, the electric sump heater should be installed near the suction outlet in the oil reservoir
and should be capable of heating the oil to approximately 80 to 100 degrees Fahrenheit over an 8
to 12 hour period of time. The sump heater must be thermostat controlled to prevent overheating
the oil.
When using a “tube and shell” type heat exchanger for lube oil heating with engine jacket water, the
heat exchanger should be rated at 80 GPM/300 PSI minimum with 2” minimum inlet and outlet oil
passage connections. The heat exchanger must be plumbed in a manner that will allow it to be
easily bypassed in the event the power end lube oil temperature starts to exceed 180 degrees
Fahrenheit.
NOTE: UPON REQUEST, WEIR OIL & GAS CAN ASSIST IN PROVIDING LUBE SYSTEM COMPONENTS
THAT MEET OR EXCEED THE SPECIFICATIONS NOTED HEREIN. PLEASE CONTACT THE WEIR OIL &
GAS ENGINEERING DEPT. FOR ANY FURTHER INFORMATION PERTAINING TO YOUR SPECIFIC PUMP
LUBRICATION REQUIREMENTS.