Sewage Pumps
KWR
Submersible, Recessed Impeller
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High Flow Performance
Heavy-Duty, Dual Silicon Carbide Seals
Recessed, Clog-Free Impeller
Hazardous Location Construction
Flows to 175 GPM / Heads to 33 Feet
1/2 HP & 1 HP, 1750 RPM
Single or Three Phase Operation
2” or 3” NPT Discharge
Optional Piggyback Float
Performance Curve
Total Head (FT)
50
40
30
20
10
0
40
80
120
Capacity (GPM)
160 180
Features and Benefits
Class 1, Div. 1
Groups C & D
Construction
1. Watertight Cable Entrance
Agency-approved, watertight strain relief cord grips with compression grommet protects outer cord jacket. Epoxy-filled inner cord
cap provides anti-wicking moisture protection to the motor even if
power cable is cut or damaged.
2. Modular Pump Design
1
Commonality of parts across the Keen product line minimizes the
amount of parts required for servicing. Heavy-duty ASTM A48,
Class 30 cast iron components.
3. Strong Motor
Powerful high-torque motor for reliable pump operation.
Pressed stator securely holds motor and efficiently transfers heat.
Class F construction with overload protection in oil-filled chamber
for cool operation and long motor life.
2
3a. Oil
Proprietary KEEN oil ensures industry-low operating temperatures.
4. 3-Bearing Support
Motor / Pump shaft securely held with upper and lower ball
bearing plus additional sleeve bearing in lower seal chamber.
Long 50,000 hour B-10 life.
4
3
5. Severe Duty Dual Mechanical Seals
Dual silicon carbide mechanical shaft seals provide twice the
moisture and grit protection for the motor. Dual seals are housed
in a secondary oil-filled seal chamber. Tougher silicon carbide
seals better handle sand, grit and abrasive materials.
6. Moisture Detection
5
6
Seal leak probe signals alarm in control panel for scheduled
maintenance.
7. Non-Overloading Hydraulic Design
Recessed centrifugal impeller allows 100% performance curve
operation from shut-off to maximum flow without damage to the
pump or system. The recessed, vortex impeller is out of the
passageway of fluid flow, eliminating concerns of blockage or
wear.
8. 2” Solids-Handling
Clear, unobstructed passageway provides reliable movement of
solids.
9
8
7
9. Vertical Discharge Connection
2“ NPT, 2-bolt flange for ease of service. Volute included with
support legs. OPTIONAL 3” NPT Reducer.
471E State Route 250 East . Ashland, Ohio 44805
419.207.9400 fax 419.207.8031
www.keenpump.com
SUBMERSIBLE SEWAGE PUMP
KWR
GENERAL
Pump Model
MOTOR DATA
PUMP DATA
03/28/2014
Date
HP / Power Supply
2” or 3” NPT, Vertical
Discharge Flange
Insulation / Class
F / Class
Poles / Rated Speed
12
Impeller Vanes
1/2HP or 1HP / 1 Phase / 60 Hz
4 P / 1750 rpm
Recessed
Impeller Type / Std. Dia.
Single Phase
PERFORMANCE CURVE
Head / [Ft]
50
45
40
35
30
25
20
KWR1
0-1H
KWR5
P
- 1/2 H
P
15
10
5
0
20
40
60
80
100
120
140
160
180
Capacity [USGPM]
Model
HP
Volts
Phase
KWR5-01
1/2
208
1
KWR5-21
1/2
230
1
KWR10-01
1
208
1
KWR10-21
1
230
1
* Performance with clear water and ambient temp 20ºC (68ºF)
Rev. 0
SUBMERSIBLE SEWAGE PUMP
KWR
GENERAL
Pump Model
MOTOR DATA
PUMP DATA
03/28/2014
Date
HP / Power Supply
2” or 3” NPT, Vertical
Discharge Flange
Insulation / Class
F / Class
Poles / Rated Speed
12
Impeller Vanes
1/2HP or 1HP / 3 Phase / 60 Hz
4 P / 1750 rpm
Recessed
Impeller Type / Std. Dia.
Three Phase
PERFORMANCE CURVE
Head / [Ft]
50
45
40
35
30
25
20
KWR1
0-1H
KWR5
P
- 1/2 H
P
15
10
5
0
20
40
60
100
80
120
140
160
180
Capacity [USGPM]
HP
Volts
Phase
KWR5-03
KWR5-23
KWR5-43
1/2
1/2
1/2
208
230
460
3
3
3
KWR10-03
KWR10-23
KWR10-43
1
1
1
208
230
460
3
3
3
Model
* Performance with clear water and ambient temp 20ºC (68ºF)
Rev. 0
8-5/8
6
SST LIFTING
HANDLE
28-1/4
26-1/4
2” OR 3” NPT
DISCHARGE
(REMOVEABLE)
6-3/8
1-15/16
KEEN PUMP CO.
471E ST ROUTE 250 EAST
ASHLAND, OHIO 44805
TITLE
SCALE
DWG. BY
PHONE: 419-207-9400
FAX: 419-207-8031
KWR(H) SEWAGE PUMP DIMENSIONS
DWG. #
NTS
SE
DATE
03/28/2014
REV.
KN-884
KWR Specifications
Pump Model – Pump shall be of the submersible centrifugal type, ____ HP KEEN KWR Series. The pump
shall easily pass 2” diameter solids through the pump end without jamming and exit through the 2” NPT discharge
/ Optional 3” NPT discharge.
Operating Conditions – The pump shall have a capacity of _______ GPM at a total head of _________
feet, and shall use a motor rated at ____ HP and 1750 RPM.
Pump Impeller – Ductile iron and threaded on a stainless steel shaft. The impeller shall be of the recessed
vortex type to provide an unobstructed passage through the volute for the solids.
Pump Housing Construction – All components of the pump construction (cord cap, motor housing,
seal plate, volute) shall be cast iron, ASTM A-48, Class 30. There shall not be any composite materials used for
any pump components.
Seals – Motor shall be protected by dual mechanical seals. Type 21, seal construction mounted in tandem, shall
protect the motor. Both seals shall be silicon / carbide. The seal face shall be lapped to a flatness of one light band.
An electrode shall be mounted in the seal chamber to detect water entering the chamber through the lower seal.
Water in the chamber shall cause a red light to turn on at the control box. This signal shall not stop the motor, but
act as a warning only, indicating service is required. All hardware shall be stainless steel. The elastomer materials
shall be nitrile.
Motor – The pump motor shall be of the submersible type, rated ____ HP, 1750 RPM. The motor shall be for 60
Hz, either 208 or 230 volt, single phase operation. Three-phase operation shall be 208, 230 or 460 volt. The motor
shall be of the permanent split capacitor design with an internal start capacitor for high starting torque. Motor
operating temperature must not exceed Class B ratings.
The stator winding shall be of the open type with Class F insulation. Winding housing shall be filled with a clean,
high dielectric oil that lubricates bearings and seals, transferring heat from windings and rotor to the outer cast
housing. Air-filled motors which do not have the superior heat dissipating capabilities of oil-filled motors shall not
be considered equal.
The motor shall have two heavy duty ball bearings and one sleeve bearing to support the pump shaft, taking radial
and thrust loadings. Ball bearings shall be designed for a minimum 50,000 hours B-10 life. The stator shall be
pressed into the motor housing. The pump shaft shall be of 416 SST, threaded to accept the pump impeller.
The motor shall be capable of operating over the full range of the performance curve without overloading. Single
phase motors shall have a heat sensor thermostat and overload attached to the top end of the motor windings to
stop the motor if the motor winding temperature reaches 200 degrees F. The high temperature shut-off will cause
the pump to cease operation, should a control failure cause the pump to run in a dry wet well. The thermostat shall
automatically reset when the motor cools to a safe operating temperature. Three-phase motors contain
temperature sensors with (2) two wires for attachment to the control box.
Power Cord – The motor power cord shall be 12 AWG/5 C SEOOW (1-Phase) or 14 AWG/7 C SEOOW
(3-Phase), 20’ length. The cable jacket shall be sealed at the motor entrance by means of a rubber compression
washer with concentric ribbing. A compression fitting shall securely hold the cable jacket and compression
grommet in place. An epoxy-filled cord cap seals the outer jacket and individual leads to prevent water from
entering the motor housing. Cord shall withstand a pull strain to meet FM requirements.
471E State Route 250 East . Ashland, Ohio 44805
419.207.9400 fax 419.207.8031
www.keenpump.com