KEENER GRINDER PUMPS - Pump Fundamentals
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KEENER GRINDER PUMPS
HGP2 - 2021 -50Hz (PATENTED)
AVAILABLE WITH
INTERNAL
HGP2 - 2023-2034-50Hz
2HP Grinder Pump
High Head, Double Stage
Doubled Output Pressure
Unmatched Performance
210 Shut-off Head
Flows to 40 gpm
Balanced Design
Ideal for Long Discharge Runs or High Static Heads
Potentially Replaces Higher HP Pumps
Ductile Iron Impeller, Recessed, Clog-Free
Silicon Carbide Seals - Grit Resistant
Features / Benefits
Cutter Assembly
● Hardened 440 SST (56-60 Rockwell) shredding ring and grinding impeller.
● 11,500 cuts / second .....690,000 cuts / minute.
Impeller
● Two Ductile Iron castings for superior quality and long life.
● Recessed impeller provides high head & non-overloading performance.
● Recessed (vortex) design reduces bearing load / increases bearing life.
● Recessed impellers prevent clogging.
Shaft Seals
● Dual full mechanical seals (silicon / carbide).
Motor
● Capacitor start / run design for assured starting, strong torque and grinding under
heavy load.
● Utilizes a low voltage, stress-free electronic start switch.
● Pressed stator design for precise shaft/bearing alignment.
● Internal overload protection.
● Dual ball bearings (upper and lower).
Oil-filled provides:
1. Constant bearing lubrication.
2. Maximum motor cooling, even temperature distribution.KEENER GRINDER PUMPS
PATENTED DUAL STAGE, 2 HP GRINDER PUMP
DISCHARGE 1-1/4" NPT, Vertical
• 120 degrees F. (Continuous)
LIQUID
• 140 degrees F. (Intermittent)
TEMPERATURE
MOTOR HOUSING Cast Iron, ASTM A-48, Class 30
CORD CAP Cast Iron, ASTM A-48, Class 30
VOLUTE Cast Iron, ASTM A-48, Class 30
SEAL PLATE Cast Iron, ASTM A-48, Class 30
• Ductile Iron
• 10 vane, Vortex with Pump-out Vanes, Dynamically
IMPELLER
Balanced
• Hardened 440C Stainless Steel
SHREDDING RING • 56-60 Rockwell C
• Hardened 440C Stainless Steel
GRINDER IMPELLER • 56-60 Rockwell C
SHAFT 416 Stainless Steel
(Lower) Mechanical
Silicon - Rotating Face
Carbide - Stationary Face
Buna-N -Elastomer
SHAFT SEAL 300 Series Stainless Steel - Hardware
(Upper) Mechanical
Silicon - Rotating Face
Carbide - Stationary Face
BEARING (UPPER) Single Row, Ball, Oil Lubricated
BEARING (LOWER) Single Row, Ball, Oil Lubricated
HARDWARE 300 Series Stainless Steel
SQUARE RINGS Buna-N
• UL / C(UL) Listed 14 AWG, Type SJOW or SOOW
CORD • 20' Length Standard. Other Lengths Available.Triple Sealed Design
Compression Grommet - Outer Jacket Seal
CORD ENTRY
Epoxy Potted - Inner Conductor Seal
Butt Connector - Inner Wire Strand Wicking Blockage
2 HP, 2900 RPM, 50 Hz
NEMA L, Includes Overload Protection in the Motor
MOTOR (SINGLE Oil Filled, Class F
PHASE) Capacitor Start / Capacitor Run
Start Capacitor..... 400 mfd, 125 volts
Run Capacitor..... 90 mfd, 250 volts
2 HP, 2900 RPM, 50 Hz
450 volts 3Ø
MOTOR (THREE PHASE)
NEMA B, Requires Overload Protection in the Control Panel
Oil Filled, Class F
Seal Materials
Additional Cable Lengths
OPTIONAL EQUIPMENT
External Capacitor Start Kits
Impeller TrimsKEENER GRINDER PUMPS
2 HP Grinder Pumps HGP2 Series-50Hz
Specifications
Pump Model - Pump shall be of the centrifugal type, KEENER GRINDER PUMP HGP2 Series,
with an integrally built-in grinder unit and submersible type motor. The grinder unit shall be capable
of macerating all material in normal domestic and commercial sewage, including reasonable
amounts of foreign objects such as sanitary napkins, disposable diapers, thin rubber, small wood,
plastic and the like to a fine slurry that will easily pass through the pump and 1-1/4" 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 2 HP and 2900 RPM. The pump has capabilities of producing 10
gpm @ 190' TDH and maximum shut-off head of 210'.
Pump Impeller - Two cast Ductile Iron impellers, threaded on a common stainless steel shaft. The
impellers shall be of the recessed vortex type to provide an unobstructed passage through the two
volutes for the ground solids.
Grinder Construction - Both grinder impellers and shredding ring shall be of 440C stainless steel
hardened to 56-60 Rockwell C. The grinder assembly shall consist of a grinder impeller and
shredding ring mounted directly below the volute passage. The grinder impeller is threaded to a
stainless steel shaft, locked with a screw and washer. The shredding ring shall be pressed into an
iron holding flange for easy removal. The flange shall be provided with tapped back-off holes so
screws can be used to push the shredding ring from the housing. All grinding of solids shall be from
the action of the grinder impeller against the shredding ring. There shall be 11,500 cuts / second.
Seal - The motor shall be protected by dual sets of dual seal construction mounted in tandem. The
seals are mechanical, Type 21, (silicon / carbide). The mechanical seal face shall be lapped to a
flatness of one light band.
Motor - The pump motor shall be of the submersible type, rated 2 HP, 2900 RPM. The motor shall
be for 50 Hz, either 240 volt, single or 415 volt three phase operation. Single phase motors shall be
capacitor start, capacitor run type for high starting torqueThe single phase motor will utilize an electronic, not mechanical starting switch. The electronic start switch shall operate and release the start windings at the "zero" potential of the sinusoidal wave form, thus eliminating any current flow during the switching operation. The start switch shall only have 120 volt potential through the switch via a center tap lead from the main windings. Run capacitor ratings shall not exceed 300 volts. Major 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 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 common motor pump and grinder shaft shall be of 416 SST, threaded to take the pump and grinder impeller. 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. Power Cord - The motor power cord shall be 14 Ga. SJOW/SJOWA or SOOW. The cable jacket shall be sealed at the motor entrance by means of a rubber compression washer and compression nut. An epoxy filled tube shall seal the outer cable jacket and individual leads to prevent water from entering the motor housing. Individual conductor strands shall be soldered within the epoxy seal.
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