| Features & Benefits |
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Goulds RGS Pump Series Range of Features:
Design: Capable of grinding domestic sewage in individual residential applications.
Cutter System: Anti-roping design. Two blade rotary cutter is threaded to shaft. Stationary cutter ring is reversible for extended service.
Impeller: Silicon bronze, semi-open, non-overloading two-vane design with pump-out vanes for mechanical seal protection. Balanced for smooth operation.
Casing: Cast iron, volute type for high efficiency. Adaptable for guide rail system.
Motor: Fully submerged in oil-filled chamber. High grade turbine oil surrounds motor for more efficient heat dissipation, permanent lubrication of bearings and mechanical seal, and protection against outside environment.
Motor Shaft: 300 series stainless steel, short overhang for minimum shaft deflection.
Designed for Continuous Operation: Pump ratings are within the motor manufacturer's recommended working limits, can be operated continuously without damage when fully submerged.
Bearings: Upper and lower ball bearings for precision positioning of parts and to carry all radial and thrust loads.
Mechanical Seal: Hardfaced Silicon carbide for longer life, stainless steel metal parts, BUNA-N elastomers.
Power Cable: Severe duty rated, oil and water resistant. Epoxy seal on motor end provides secondary moisture barrier in case of outer jacket damage and to prevent oil wicking.
O-Ring: Assures positive sealing against contaminants and oil leakage.
Paint: Electro-coat paint process protects all casting surfaces. |
| General Description |
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Goulds RGS2012 Residential Grinder Pump Specifications:
• Capacities: to 41 GPM
• Total heads: to 95' TDH
• Discharge: 11⁄4" NPT
• Temperature: 104ºF (40ºC) maximum continuous, 140ºF (60ºC) maximum intermittent
• Single mechanical seal: silicon carbide rotary/silicon carbide stationary, 300 series stainless steel metal parts, BUNA-N elastomers
• Fasteners: 300 series stainless steel
• Rotating cutter and cutter ring: 440 C hardened stainless steel
Pump(s) shall have 1¼ inch NPT vertical discharge. The pump shall be capable of grinding domestic and raw sewage containing small quanitities of plastic, rubber, cloth, paper and other non-abrasive solids. |
| Drive Assembly |
|---|
| The grinder assembly shall consist of two hardened components mounted directly below the impeller. The two components shall be the rotating cutter and reversible cutter ring both of which shall be constructed of type 440C stainless steel hardened to 55-60 Rockwell “C” scale value. The rotating cutter shall be threaded to the pump shaft. The cutter ring shall be pressed into the casing directly below the suction opening of the pump. The cutter ring shall then be secured by three type 300 series stainless steel screws for corrosion resistance. The stationary cutter ring shall be reversible such that once wear has occurred the ring can be turned over and new, unused surfaces exposed. Each component shall be designed for long life and ease of service. All hardware shall be series 300 stainless steel. |
| Materials of Construction |
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| The casing, bearing housing and motor cover shall be of ASTM A48 class 30 high-quality cast iron for strength and long life. The bronze impeller shall be cast from ASTM B584 UNS C87600 as standard. |
| Motors |
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• Single phase: 2 HP, 60 Hz, 3450 RPM, 208/230 V, capacitor start with on winding thermal protector. No external capacitor kits required.
• Class F insulation
• Shaft: 300 series stainless steel threaded design
• Bearings: ball bearings upper and lower Power Cord with bare lead ends:
• Use for connections in a control panel or junction box
• Standard length 20', 14/3 STOW
• Optional lengths of 30', 50' and 100'
Power Cord with 230 V NEMA three prong grounding plug:
• P suffix equals a 20' long cord with plug
• PS suffix equals a 30' long cord with plug
• Allows direct connection to piggyback type float switch |
| Mechanical Shaft Seal Information |
|---|
| The motor shall be protected by a mechanical shaft seal mounted on the pump shaft. The mechanical seal faces shall be constructed of silicon carbide contacting silicon carbide. The spring system shall be constructed of series 300 stainless steel metal components and Buna-N elastomers. Seal face materials other than silicon carbide shall not be allowed. |
| Motor Information |
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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 208/230 V, single phase. The single phase 2 HP motor shall be capacitor start design. Motors shall be equipped with on winding thermostats connected in line to provide automatic reset operation.
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. |
| Impeller Information |
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| The impeller shall be semi-open, non-clog, with ejector (pump out) vanes on the top of the impeller shroud for protection of the mechanical seal and to improve hydraulic balance. Only single plane dynamic balancing shall be required for smooth operation. The impeller shall be threaded to the shaft and not key driven. The impeller shall be designed such that the rotating cutter vanes can be accurately aligned to the impeller vanes for proper solids passage through the pump. |
| Casing Information |
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| 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 1¼ inch NPT suitable for direct connection to the station piping, without the use of any external fittings or adapters for vertical orientation of the discharge direction. |
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