Monster GSM25 Pumphead - NEMA 56C Frame

The GSM25 pumphead in a NEMA 56C close-coupled configuration. Bolts directly to any standard NEMA 56C motor. Flow rate scales with motor speed: 12 GPM at 1800 RPM, 20 GPM at 2850 RPM, 25 GPM at 3450 RPM. When your pumphead wears out, replace it without touching the motor.

Cast iron body, helical cut steel gears, Viton seals, 1 inch NPT ports. The 14mm keyed shaft connects to your motor via a standard coupler. Self priming. No pressure relief valve — the outlet must remain open during operation.

Flow Rate and Motor Guide

• 1800 RPM, 12 GPM — Cold motor oil, waste oil. Minimum 3/4 HP.
• 3450 RPM, 25 GPM — Light oils (diesel, warm ATF, hydraulic). Minimum 3/4 HP.
• 3450 RPM, 25 GPM — Heavier oils (cold motor oil, heavy gear oil). 1 HP to 2 HP recommended.

Specifications

• SKU: W2083
• Mount: NEMA 56C Close-Coupled
• Design: Positive Displacement Gear Pump
• Flow Rate: 12 GPM at 1800 RPM, 20 GPM at 2850 RPM, 25 GPM at 3450 RPM
• Self Priming: Yes
• Port Size: 1 inch NPT Inlet and Outlet
• Shaft Size: 14mm keyed
• Seals: Viton (high temp)
• Pressure Relief: None, outlet must remain open during operation
• Body: Cast Iron
• Gears: Helical cut carbon steel

What's in the Box

• GSM25 Cast Iron Gear Pumphead (NEMA 56C Mount)
• Two (2) 1 inch NPT to 1.25 inch Hose Barbs

Note: Motor, shaft coupler, handle, base, and hoses are not included. This pumphead has no pressure relief valve. Never run against a closed valve or blocked outlet.