Specification

HT450 - Series Specifications

1.01 GENERAL:

The contractor shall provide labor, material, equipment, and incidentals required to provide (QTY) centrifugal pumps as

specified herein. The pump models covered in this specification are Series HT450 single phase pumps. The pump furnished for this

application shall be model ______________as manufactured by Liberty pumps.

2.01 OPERATING CONDITIONS:

Each submersible pump shall be rated at 1/2 hp, 115 volts, single phase, 60 Hz., 3450 RPM. The unit shall produce ______G.P.M.

at ______ feet of total dynamic head.

The submersible pump shall have 3/8” solid handling capability and be able to handle liquid temperatures to 180 degrees F. The

submersible pump shall have a shut-off head of 34 feet and a maximum flow of 52 GPM @ 0 feet of total dynamic head.

The pump shall be controlled with a wide angle, high temperature rated float switch with piggy-back style plug.

3.01 CONSTRUCTION:

Each centrifugal sump pump shall be equal to the Certified HT450-Series pumps as manufactured by Liberty Pumps,

Bergen NY. The motor housing is powder coated aluminum construction. The motor housing shall be oil filled to dissipate heat. Air

filled motors shall not be considered equal since they do not properly dissipate heat from the motor. All mating parts shall be sealed

with a Buna-N o-ring. All fasteners exposed to the liquid shall be stainless steel. The motor shall be protected on the top side with a

sealed cord entry plate with molded pins to conduct electricity eliminating the ability of water to enter internally through the cord. The

motor shall be protected on the lower side with an engineered double lip seal with stainless steel springs. The pump shall be

furnished with stainless steel handle.

4.01 ELECTRICAL POWER CORD

The submersible pump shall be supplied with 10 feet of multiconductor power cord. It shall be cord type YELLOW

UL 16-3 SJEOOW 300V 105°C, capable of continued exposure to the pumped liquid. The power cord shall be sized for the rated full

load amps of the pump in accordance with the National Electric Code. The power cable shall not enter the motor housing directly but

will conduct electricity to the motor by means of a water tight compression fit cord plate assembly, with molded pins to conduct

electricity. This will eliminate the ability of water to enter internally through the cord, by means of a damaged or wicking cord.

5.01 MOTORS

Single phase motors shall be oil filled, permanent split capacitor, class F insulated NEMA B design, rated for continuous duty. At

maximum load the winding temperature shall not exceed 155 degrees C unsubmerged. Since air filled motors are not capable of

dissipating heat they shall not be considered equal. The pump motor shall have an integral thermal overload switch in the windings

for protecting the motor. The capacitor circuit shall be mounted internally in the pump.

6.01 BEARINGS AND SHAFT

Upper and lower ball bearings shall be required. The bearings shall be a single ball / race type bearing. Both bearings shall be

permanently lubricated by the oil, which fills the motor housing. The motor shaft shall be made of 300 or 400 series stainless steel

and have a minimum diameter of .311".