MP Pumps FRX-50, FRX-50R User Manual

®

®

FRX 50 STAINLESS STEEL CENTRIFUGAL PUMP
FRX 50-R POLYPHENYLENE SULFIDE CENTRIFUGAL
INSTALLATION, OPERATION, AND REPAIR MANUAL

Models FRX 50 & FRX 50-R are high
performance centrifugal pumps.
The pumps are ideal for marine,

ndustrial, agricultural or commercial

i
applications. The FRX 50 model
features all 316 stainless steel
components for superior corrosion
resistance when pumping chemical
compounds. FRX 50-R has
polyphenylene sulfide housing &
cover. A carbon/ceramic/viton bellows
seal is standard. FRX 50 ports are 1/2"
NPT/1" Hose. FRX50-R has 1" hose
connections.

FRX 50

FRX 50-R

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.

• DO NOT perform service or maintenance
when the pumping system is pressurized.
Injury or death may occur.

• DO NOT operate the pump in a manner
that it was not intended to be used.

• DO NOT mount the pump such that high
piping loads exist on the pump flanges, or
in a rigid piping system that does not allow
the pipe to expand and cause the pump to
be strained.

ALLATION:

INST

Install the pump wher

e the inlet is below the liquid level. A valve may be used to isolate the

• DO NOT continue to operate the pumping
system when a known leak exists.

• DO NOT continue to operate the pump
when unusual noise or vibration occurs.

• DO NOT operate beyond the pressure or
temperature limits stated in the product
literature. See Form 8110.

• DO NOT allow severe temperature changes
to occur in a short time period within the
pumping system.

pump for service. The pump is not self-priming and needs the inlet to be flooded at start-up.
The motor is splash r

esistant, not submersible, and should be located in a dr

y envir

onment.

FORM 3810A (09-07)

®

PIPING/MOUNTING:

The pump inlet and outlet has 1/2" NPT - 1" hose connections.
Use pipe sealant on the threads and other connections. The
base does not require direct mounting if one of the pipe
flanges is rigid mounted. Do not rigid mount both the flanges
and the base to avoid mounting tolerances that may distort

he motor base. Install the pump with the shaft in a

t
horizontal direction.
Never install the pump vertical with the motor below the
pump.

OPERATION:

The pump should be operated with liquid in the pump
otherwise seal damage may occur. If an inlet valve is present,
the valve should always be completely open during
operation to avoid cavitation. An outlet valve may be used to
throttle the flow rate. Avoid repeated starts and stops; the

ump can operate for a long period of time without any flow.

p
DC motors are brush type and may emit a noise from the
brush that can sound like a squeal, this is normal. The pump
will be extremely quiet unless there is air in the system.

ELECTRICAL:

The motor must be protected from over current by using a
fuse or circuit breaker (see chart below for correct protection).
The proper minimum wire size is stated for each voltage

pplication. Make sure that the pump has the proper voltage

a
rating to match the installation power. Do not use or install if
the voltage on the label is different than the installation. All
wire connections must be secure and sealed to protect
arcing. Follow all local installation codes.

MOTOR VOLTAGE FUSE/CB WIRE SIZE

ON NAME PLA

12VDC 15 14

24VDC 10 16
110VAC 2 18
230VAC 1 18

TE AMPS AWG

REPAIR AND MAINTENANCE:

The pump has a carbon/ceramic seal that may last several
thousand hours based upon the application. The motor is not
rebuildable after the brushes (DC) have worn to the limits. A

eal that leaks will show leakage through the slot between the

s
pump housing and the motor. Extreme leakage may damage
the motor bearings and contaminate the inside of the motor.

FORM 3810A (09-07)