12GS – Submersible Grinder Pump
Designed for high head residential sewage applications where a gravity system is not practical. Ideal for pressure sewage systems.
Features and Benefits- 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 slide 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 over-hang 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 loads 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.
- May be used with optional 11/4" stainless steel guide rail, Model A10-12. Ordered separately.
- Capacities
- Total heads
- Discharge
- Single Mechanical Seal
- Fasteners
- Rotating cutter and cutter ring
- to 41 GPM
- to 95' TDH
- 1 1/4" NPT
- Silicon carbide rotary/silicon carbide stationary, 300 series stainless steel metal parts, BUNA-N elastomers
- 300 series stainless steel
- 440 C hardened stainless steel
Parts List
Service Manual
Specifications
SELECTION & SIZING TOOLS
Bell & Gossett offers several useful engineering tools for easy sizing of every area of a building. Simple to navigate software gives you accurate information and up-to-date documentation downloadable straight into your submittal package.
Some tools require a registered account: New User Registration | Existing User Password Help
| Selection Tools: | |
| ESP-DESIGN PLUS |  Bell & Gosset: Multi-Stage, Pressure Booster Packages, Wastewater, Vertical Turbines |
| ESP-PLUS | Bell & Gossett Pump Selection: Circulators, End Suction, Closed-Coupled, Inline, Double Suction |
| ESP-THERMAL | Bell & Gossett Gasket Plate & Frame and, Brazed Plate Heat Exchangers |
| ESP-PARTS | Parts Selection |
| Steam-2000 | Steam 200 Selection |
| Steam-1140 | Series 1140 Steam Service Regulators |
| Water-1140 | Series 1140 Water Service Regulators |
| Steam-Traps | Steam Traps Selection |
| CAD Drawings | CAD Drawings |
| Sizing Tools: | |
| System Syzer | System Sizing |
| System Syzer Psychrometry | System Sizing related to coil cooling |
| Steam-Pipe | Steam Pipe Sizing |
| Steam-Loss | Steam Loss Through Failed Trap |
| Flash-Steam | Flash Steam Sizing |
| Condensate-Pipe | Condensate Pipe Sizing |
Stand-Alone Software
For a Windows Applications (stand-alone) version of ESP-PLUS, please contact your local B&G Representative.
ESP Software Support:
For ESP Software Support, please contact ebusiness.support@xyleminc.com
Bell & Gossett
Bell & Gossett is a leading manufacturer of pumps, valves, heat exchangers, and accessories for plumbing, wastewater, and HVAC—including steam and heat transfer—applications.
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