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PG331 Series Cast Iron Gear Pump, 3.92 cu in/rev, 2/4-Bolt SAE B Mounting Flange, 13T Splined x 1.61 long SAE B Shaft, SAE -20 Side Inlet SAE -16 Side Outlet, CW Rotation

Description & Features

Designed for optimal performance, the PG331 Series Cast Iron Gear Pump provides a displacement of 3.92 cu in/rev, making it ideal for demanding hydraulic applications. This pump features a 2/4-Bolt SAE B mounting flange and a 13T splined shaft measuring 1.61 inches in length, ensuring compatibility with various systems. Constructed from durable cast iron, it offers exceptional volumetric efficiency through innovative design and precise machining tolerances.

The pump operates with a clockwise rotation and includes a SAE -20 side inlet and SAE -16 side outlet, supporting a continuous working pressure of up to 2900 PSI. It benefits from axial compensation via floating bushings and DU bearings, which enhance high-pressure capability and reliability. Suitable for use with fluids within a viscosity range of 85 SUS to 297 SUS, the PG331 Series Gear Pump is engineered to perform efficiently across diverse conditions.

SKU: 615200072

Supplier Part Number (MPN): 615200072

Alternate Part Numbers: C1MW27, PG331-72D-R55S3

Specifications

Displacement 3.92	Displacement 3.92	Brand Salami Hydraulics Na Inc	Brand Salami Hydraulics	Pack Size 1.00	UOM EA	Mount 2/4-Bolt SAE B	Mount 2/4-Bolt SAE B	Ports SAE -20 Side Inlet SAE -16 Side Outlet	Ports SAE -20 Side Inlet SAE -16 Side Outlet	Pressure Rating 2900	Rated Flow 30.10	Rated Flow 30.1	Rotation CW	Shaft 13T Splined x 1.61 long SAE B	Shaft 13T Splined x 1.61 long SAE B	Speed Rating 2250 RPM	Speed Rating 2250 RPM	Supplier Part Number 615200072	Alternate Part Numbers Alternate Part Number C1MW27, Alternate Part Number PG331-72D-R55S3	Product Weight 41.80 lbs

Similar Products

Model Number	Displacement	Rated Flow	Mount	Shaft	Ports	Rotation	Pressure Rating	Speed Rating
615200022 PG331 Series Gear Pump	1.74	13.4	2/4-Bolt SAE B	13T Splined x 1.61 long SAE B	SAE -16 Side Inlet SAE -12 Side Outlet	CW	4000	2700 RPM
615200032 PG331 Series Gear Pump	2.1	16.1	2/4-Bolt SAE B	13T Splined x 1.61 long SAE B	SAE -16 Side Inlet SAE -12 Side Outlet	CW	4000	2700 RPM
615200072 PG331 Series Gear Pump	3.92	30.1	2/4-Bolt SAE B	13T Splined x 1.61 long SAE B	SAE -20 Side Inlet SAE -16 Side Outlet	CW	2900	2250 RPM

Product Questions & Answers (2)

Question by: Dale M on Jun 24, 2025, 2:52 PM

Will this gear pump work okay with standard hydraulic fluid, or do I need to get something special?

Answer by: Customer Support on Jun 26, 2025, 6:07 AM

This gear pump is compatible with standard hydraulic fluids, within the viscosity and temperature ranges specified. Normal operating range is 85 SUS to 297 SUS, and temperature should be between -4°F to 185°F with the standard Buna-N seals.

Question by: Shawn C on Mar 20, 2026, 4:06 PM

pump's rated at 2250 RPM continuous -- is that based on the full 3.92 displacement or does it drop off at higher pressures?

Answer by: Customer Support on Mar 22, 2026, 6:48 AM

At 3.92 cubic inches per revolution, the continuous speed rating of 2250 RPM applies at the working pressure specified for that displacement range. Salami publishes a displacement-versus-speed table for the PG331 series, and the rated flow of 30.1 GPM reflects operation at that speed under those conditions. If you're pushing toward the upper end of the pressure range, expect the continuous speed ceiling to shift downward in line with what that table shows for your specific operating pressure.