MP Pumps HYDRASUB 20_25 INSTRUCTION - Manual

HYDRASUB 20/25 HYDRAULICALLY DRIVEN SUBMERSIBLE PUMP
INSTALLATION, OPERATION, AND REPAIR MANUAL
HYDRASUB 20/25 is a compact, lightweight,
hydraulically driven submersible pump with high flow
capabilities. This self-priming pump is made with a
high strength aluminum alloy that is anodized for
corrosion resistance. This pump features a stainless
steel impeller, ball bearing, and a gerotor type
hydraulic motor. HYDRASUB 20/25 may be used to
pump out underground vaults and pits.
GENERAL SAFETY INFORMATION:
THE FOLLOWING WARNINGS ARE USED TO NOTIFY AND ADVISE THE USER OF THIS PRODUCT OF PROCEDURES
THAT MAY BE DANGEROUS TO THE USER OR RESULT IN DAMAGE TO THE PRODUCT.
THIS BULLETIN MUST BE READ COMPLETELY BEFORE INSTALLING, OPERATING, OR SERVICING, THE PUMP.
FORM 3069A (05-04)
WARNING
NEVER OPERATE THE PUMP WITH UNSECURED HOSES
AND HYDRAULIC LINES. SEVERE INJURY MAY OCCUR
FROM IMPACT, IMPINGEMENT, OR LIQUID BLAST.
COLD WEATHER OPERATION MAY REQUIRE
PREHEATING THE OIL OR BYPASSING THE OIL IN THE
POWER SUPPLY TO PREHEAT IT UNTIL THE OIL
REACHES A TEMPERATURE OF 50
o F.
• DO NOT perform service or maintenance
when the pumping system is pressurized.
• DO NOT continue to operate the pumping
system when a known leak exists.
• DO NOT operate beyond the pressure
or temperature limits stated in the product
literature. See Form 8107/8108.
• DO NOT operate the pump in a manner
that it was not intended to be used.
• DO NOT use in explosive atmospheres or
pump volatile liquids.
INSTALLATION:
HYDRAULIC OIL SYSTEM REQUIREMENTS:
The hydraulic power supply must be capable of delivering a
controlled flow rate of 5-9gpm for Model 20 and 8-14gpm for
Model 25. The operating oil pressure will vary upon the flow
rate load of the pump from 700 to 2100 psi. A maximum relief
valve setting of 2400psi is recommended.
A hydraulic supply system where the flow rate is controlled is
referred to as an “open center system.” This is the most
accurate system to assure that the flow rate does not exceed
the maximum limit.
A “closed center system” will have a variable oil flow rate based
upon the hydraulic pressure that is a set value. If a closed
center system is used, the maximum pressure developed must
not exceed 1700 psi, and the pump must always have a
supply of water to pump to protect it from running into an over
speed condition unless the oil flow rate is limited to less than
the maximum.
The maximum return pressure or backpressure is 100psi.
Higher pressures will result in reduced seal life. Do not install
down stream loads or valves. Always allow the return to go
directly back to the tank.
Supplemental oil cooling may be required to keep the oil
temperature below 175
0 F. Suitable filtration is required
(25 micron recommendation) to clean the oil of contaminants
that may accelerate wear.
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