Monster 4 GPM Bare Pump - 1hp, 230/460V 3-Phase

The Monster 4 GPM Bare Pump in 3-Phase is built for industrial installations where single-phase power is not available. The GSM13 cast-iron pumphead moves 4 GPM of vegetable oil, gear oil, or motor oil at controlled flow, and the 1HP Baldor motor runs on 230/460V 3-phase, the standard for industrial facilities, processing plants, and commercial shops. No handle, no switch, no plug. Wire it into your panel and mount it to your skid.

3-phase power delivers smoother torque and more efficient motor operation than single-phase, making this configuration well suited for continuous-duty industrial environments. The GSM13 pumphead is self-priming and handles light to medium viscosity fluids. At 4 GPM, this is a controlled-flow pump ideal for metered transfer, filling operations, or applications where lower flow rate and higher pressure capability matter more than raw throughput.

Bare Pump Configuration

This unit ships without a carry handle, switch, or pre-wired cord. It is intended for hardwiring into a 3-phase panel or control system. If you need a ready-to-run portable unit, see the Monster 12 GPM or 25 GPM Portable Pump line.

The GSM13 Pumphead

The GSM13 is a direct-drive, cast-iron positive displacement gear pumphead with helical-cut steel gears. Self-priming, pulseless, and quiet. Viton seals handle vegetable oils, motor oils, gear oils, and other light to medium viscosity fluids. The fluid itself lubricates the internal gears with no separate lubrication required.

The Motor

US-Made Baldor industrial motor, 1HP, 230/460V 3-Phase, 60HZ, NEMA 56C frame. Ships bare with no switch, no cord, and no handle.

Specifications

• SKU: W2097
• Pumphead: GSM13 Cast-Iron Positive Displacement Gear Pump
• Flow Rate: 4 GPM
• Self-Priming: Yes
• Port Size: 1" NPT Inlet / Outlet
• Seals: Viton (high-temp)
• Motor: 1 HP, 230/460V 3-Phase, 60HZ, NEMA 56C
• Handle: Not included (bare pump)
• Wiring: Not included, requires hardwiring into 3-phase panel
• Viscosity: Light to medium viscosity oils

What's in the Box

• GSM13 Cast-Iron Gear Pumphead
• US-Made Baldor Motor (1 HP, 230/460V 3-Phase)
• Three-piece shaft coupler with rubber element
• Two (2) 1" NPT Hose Barbs

Note: Hoses, wands, switches, and mounting hardware are sold separately. Requires 230/460V 3-phase power source.