538164 4 Goulds WS D3 Series Submersible Sewage Pump Specifications

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SPECIFICATIONS
3888D3SPEC

Model 3888D3
SUBMERSIBLE SEWAGE PUMPS

GENERAL
• Furnish and install _____ Goulds Water Technology, Model 3888D3, dual seal submersible sewage pump(s), _____ HP,
_____ phase, _____ volts, _____ Hz, pump(s) rated for _____ GPM, at _____ Ft. Total Dynamic Head.
• Pump(s) shall be Goulds Water Technology, Order No: WS____________D3 .
QUALIFICATIONS
All pump manufacturers must be pre-qualified by the engineer in order to qualify as acceptable manufacturers. Prequalification shall be no later than two (2) weeks prior to published bid date for this project. Failure to pre-qualify will
be grounds for disqualification after the bid opening date. All decisions of qualification shall reside with the engineer
of record at time of bidding.
PUMP DESIGN
Pump(s) shall have 3 inch ANSI discharge flange and shall be capable of handling sewage containing non-abrasive 2½
inch maximum solids.
MECHANICAL SHAFT SEALS
The motor shall be protected by two independent sets of mechanical shaft seals mounted in tandem on the pump
shaft. Pump designs with one or two springs acting between rotating faces shall not be allowed as this design would allow effluent to force the seal faces apart during periods of upset or high discharge pressure. The outer mechanical seal
shall be constructed of Silicon Carbide vs. Silicon Carbide (or lower seal optional Silicon Carbide vs. Tungsten) sealing
faces. The inner mechanical seal shall be constructed of Carbon vs. Ceramic sealing faces. Each set (upper and lower)
shall be tensioned by an independent spring system constructed of series 300 stainless steel metal components and
BUNA-N elastomers. The mechanical seals shall be located in a completely isolated seal oil chamber which will provide
lubrication for the seal faces while simultaneously acting as an isolation zone for the stator chamber.
IMPELLER
The impeller shall be semi-open, two vane non-clog, with ejector (pumpout) vanes on the top of the impeller for protection of the lower mechanical seal and hydraulic balance. Due to design, only single plane spin balancing shall be
required for smooth operation. The impeller shall be slip fitted to the shaft and key-driven. The impeller shall be held
in place with a bolt and washer system that shall secure the impeller against all axial loads imposed by the hydraulic
conditions of operation.
CASING
The casing shall be cast from ASTM A48 class 30 gray cast iron of sufficient thickness to withstand 1.5 times the shut off
pressure generated by the largest impeller available for this model in accordance with current revision of the Hydraulic
Institute Standards. The discharge connection shall be a standard 125 # ANSI 3 inch flange. The discharge flange shall
be capable of bolting to a 3x4 inch wet pit guide rail. The guide rail system shall support the full weight of the submersible pump without the need for any supports under the pump which would cause solids to build up and starve the
pump.

WET PIT INSTALLATION SYSTEM
Pumps are designed for use on guide rail systems and Base Elbow Disconnect systems fitted with vertical 125# ANSI
flanges for horizontal discharge. See our Accessory catalog section for available disconnect systems.
MAJOR CASTING MATERIALS
The impeller, casing, bearing/seal housing and motor cover shall be of ASTM A48 Class 30 high quality cast iron for
strength and long life. Bronze impeller shall be cast from ASTM B584 C87600 when ordered as an option.
CORROSION PROTECTION
The pump/motor shaft wetted-end shall be series 300 stainless steel. Both inner and outer surfaces of cast iron shall
be electrocoat-painted with thermo-setting Acrylic baked at 400º F., after castings are completely machined. The gland
nut/strain relief’s shall be series 300 stainless steel.
MOTOR
The integral motor shall be completely sealed from the environment by use of circular cross section o-rings accurately
fitted into machined grooves which shall provide designed compression of metal to metal fits. Designs which require a
specific torque on the casing bolts or which require rectangular gaskets or sealing rings shall not be allowed. The motor shall be rated for continuous duty under full nameplate load while at partial submergence in the station. The motor
shall be provided at the specified site conditions of 208 or 230 volts, single phase or 200, 230, 460 or 575 volts, three
phase as required, all shall be at 60 Hz.
Single-phase motors: 1½ - 5 HP shall be permanent split capacitor type. All single-phase motors shall be provided with
on-winding thermal protection with automatic reset. Three phase motors require Class 10, quick trip, ambient compensated overload protection in the control panel. The stator winding shall be open type with class F insulation suitable for operation in clean dielectric oil for efficient heat transfer and lubrication of the ball bearings. The stator shall
be a register fit into the bearing housing to ensure positive alignment, and bolted for ease of serviceability. The motor
shall be provided with ball type anti-friction bearings which shall support the heavy-duty rotor shaft and to handle all
radial and axial loads imposed by the impeller while limiting shaft deflection at the mechanical seal faces. Sleeve type
bearings shall not be considered equal and shall not be allowed. The ball bearings shall be designed for a B-10 life of
30,000 hours minimum. The motor shall be designed and tested to withstand an 18-day locked-rotor operation without damage.
POWER CABLE
The power cable shall be sealed at the motor end as it enters the motor casing by a two part barrier to moisture intrusion. The first line of defense shall be the compression of the oil and chemical resistant grommet which shall seal the
outer jacket of the power cord. In the event that the outer jacket of the power cord should become damaged, then the
second line of defense shall be the epoxy poured isolated conductors within the jacketed cable itself. The insulation
shall be removed from the individual conductors and the epoxy shall be allowed to form a leak-proof seal against wicking of the power cable between the outer jacket and the insulation of the individual conductors. The outer jacket of the
power cord shall be oil resistant and water resistant. The power cable shall be rated for NEC severe service “S”, type
“STOW”.
PUMP OPTIONS
Silicon Bronze Impeller
Silicon Carbide/Tungsten Carbide Lower Seal
Longer Power Cords

Xylem Inc.
2881 East Bayard Street Ext., Suite A, Seneca Falls, NY 13148
Phone: (866) 325-4210 Fax: (888) 322-5877
www.xyleminc.com/brands/gouldswatertechnology
Goulds is a registered trademark of Goulds Pumps, Inc. and is used under license.
© 2012 Xylem Inc.

3888D3SPEC R1

April 2012
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