1

250-Series Electrical Data

MODEL HP

VOLTAGE

PHASE

FULL

LOAD
AMPS

LOCKED

ROTOR

AMPS

THERMAL

OVERLOAD

TEMP

STATOR

WINDING

CLASS

CORD

LENGTH

DISCHARGE AUTOMATIC

250

1/3

115

5.2

120°C / 248°F

B 10 1

1/2

MANUAL

250-2 1/3 115

1 5.2 8 120°C / 248°F

B 25 1

1/2

MANUAL

251 1/3

115 1 5.2 8 120°C / 248°F

1 1/2

YES

INTEGRAL

FLOAT

251-2 1/3 115

1 5.2 8 120°C / 248°F

B 25 1

1/2

YES

INTEGRAL

FLOAT

253 1/3

115 1 5.2 8 120°C / 248°F

B 10 1

1/2

YES

PIGGY BACK

FLOAT

253-2 1/3 115

1 5.2 8 120°C / 248°F

B 25 1

1/2

YES

PIGGY BACK

FLOAT

257 1/3

115 1 5.2 8 120°C / 248°F

B 10 1

1/2

YES

INTEGRAL

VERTICLE

FLOAT

257-2 1/3 115

1 5.2 8 120°C / 248°F

B 25 1

1/2

YES

INTEGRAL

VERTICLE

FLOAT

250-Series Technical Data

IMPELLER

VORTEX ENGINEERED

POLYMER

SOLIDS HANDLING SIZE

½"

PAINT

POWDER COAT

MAX LIQUID TEMP

60°C 140°C

MAX STATOR TEMP

CLASS B

130°C/ 266°F

THERMAL OVERLOAD

120°C / 248°F

POWER CORD TYPE

SJTW

MOTOR HOUSING /
VOLUTE

CLASS 25 CAST IRON

SHAFT

STAINLESS

HARDWARE

STAINLESS

ORINGS

BUNA N

MECHANICAL SEAL

UNITIZED CERAMIC

CARBON

WEIGHT

23 LBS

250-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 250 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 1/3 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 be capable of handling effluent with 1/2" solid handling capability. The submersible pump shall have

a shut-off head of 18 feet and a maximum flow of 42 GPM @ 5 feet of total dynamic head.

The pump shall be controlled with:

______A piggy back style on/off float switch.

______An integrally wired on/off float switch.

______A Vertical Mechanical Float (VMF) type on/off switch.

______A NEMA 4X outdoor simplex control panel with three float switches and a high water alarm.

______A NEMA 1 indoor simplex control panel with three float switches and a high water alarm.

______A NEMA 4X outdoor simplex control panel with four float switches and a high water alarm.

______A NEMA 1 indoor simplex control panel with four float switches and a high water alarm.

______A NEMA 4X outdoor duplex control panel with three float switches and a high water alarm.

______A NEMA 1 indoor duplex control panel with three float switches and a high water alarm.

______A NEMA 4X outdoor duplex control panel with four float switches and a high water alarm.

______A NEMA 1 indoor duplex control panel with four float switches and a high water alarm.

3.01 CONSTRUCTION:

Each centrifugal effluent pump shall be equal to the

certified Series 250 SERIES pumps as manufactured by Liberty

Pumps, Bergen NY. The castings shall be constructed of class 25 cast iron. 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

machined and 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 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 a unitized ceramic/carbon seal with stainless steel

housings and spring. The pump shall be furnished with stainless steel handle.

4.01 ELECTRICAL POWER CORD

The submersible pump shall be supplied with 10 or 25 feet of multiconductor power cord. It shall be cord type SJTW, 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 fitting 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 B insulated NEMA B design, rated for continuous duty. At

maximum load the winding temperature shall not exceed 130 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".

7.01 SEALS

The pump shall have a unitized carbon / ceramic seal with stainless steel housings and spring equal to Crane Type 6A. The motor

plate / housing interface shall be sealed with a Buna-N o-ring.

8.01 IMPELLER

The impeller shall be engineered polymer, with pump out vanes on the back shroud to keep debris away from the seal area. It

shall be threaded to the motor shaft.

9.01 CONTROLS

All pumps can be supplied with a CSA and UL approved VMF type switch, an integrally wired wide angle tilt float switch, or piggy

back type wide angle tilt float switches. The piggy back style switches are equipped with a plug that allows the pump to be

operated manually without the removal of the pump in the event that a switch becomes inoperable. Manual pumps are operable

by means of a pump control panel.

10.01 PAINT

The exterior of the casting shall be protected with Powder Coat paint.

11.01 SUPPORT

The pump shall have cast iron support legs, enabling it to be a free standing unit.

12.01 SERVICEABILTY

Components required for the repair of the pump shall be shipped within a period of 24 hours.

13.01 FACTORY ASSEMBLED TANK SYSTEMS WITH GUIDE RAIL AND QUICK DISCONNECT DISCHARGE

______ Guide factory mounted rail system with pump suspended by means of bolt on quick disconnect which is sealed by means

of nitrile grommets or o-rings. The disconnect system shall have an internal ball check. The Discharge piping shall be schedule

80 PVC and furnished with a PVC shut-off ball valve. The Tank shall be wound fiberglass or roto-molded plastic. A cast iron inlet

hub shall be provided with the fiberglass systems.

______ Stainless steel Guide Rail

______ Zinc plated steel Guide Rail

______ "diameter of basin size

______ "height of basin size

______ "distance from top of tank to discharge pipe outlet

______ Fiberglass cover

______ Structural foam polymer cover

______ Steel cover

______ Simplex System with Outdoor panel and alarm

______ Duplex System with Outdoor panel and alarm

______ Separate Outdoor Alarm

______ Remote Outdoor Alarm

14.01 TESTING

The pump shall have a ground continuity check and the motor chamber shall be Hi-potted to test for electrical integrity, moisture

content and insulation defects. The motor and volute housing shall be pressurized, and an air leak decay test is performed to

ensure integrity of the motor housing. The pump shall be run, voltage current monitored, and the tester checks for noise or other

malfunction.

15.01 QUALITY CONTROL

The pump shall be manufactured in an ISO 9001 certified Facility.

16.01 WARRANTY

Standard limited warranty shall be 2 years.