Gorman-Rupp VGH4D VGH Series High-Efficiency Centrifugal Pump

The Gorman-Rupp VGH4D is a 5 x 4 inch model in the VGH Series of high-efficiency standard centrifugal pumps, designed for clean liquids and mild abrasives. It gives 1400 GPM at up to 284 ft head with 0.63 inch solids passage, in a ductile iron casing with an enclosed cast iron impeller and a bearing pedestal that mounts to electric motors.

A standard end-suction pump for water and process duty

Unlike the self-priming and trash-pump ranges, the VGH is a conventional flooded-suction centrifugal built for maximum operating efficiency and low energy use. Casings carry dynamic positioning vanes at the volute entrance that guide fluid directly into the impeller eye. The enclosed impeller has double-curvature vanes. The manufacturer lists municipal water systems and industrial processes as typical uses, and notes that the pump can handle clean fluids to dirty liquids and mild abrasives. A suction strainer, hand primer or alternative gaskets and mechanical seals are available for fuel and petroleum-based liquids.

Technical specification

Mechanical design notes

The heavy-duty oil-lubricated bearing pedestal accepts a motor drive; dual ball bearings keep shaft friction low and sight gauges show oil level. The long-life mechanical seals are standard. Because the VGH is not self-priming, plan for flooded suction or a priming arrangement and check net positive suction head on the final layout.

Models around the VGH4D

The VGH4D sits where flow and head are both mid-range, which is the usual choice for booster duty, cooling circuits and transfer pumping. Verify liquid temperature and abrasive content with the manufacturer before ordering.

Duty point in other units (derived)

Unit conversions below are calculated from the printed maximum values and are not manufacturer statements.

When comparing the VGH4D with a self-priming pump, remember that a standard end-suction pump gives better efficiency on clean liquid but needs flooded suction or a primer. The VGH range is listed with ductile iron casings and cast iron impellers; for corrosive or seawater duty ask about alternative materials, because the brochure mentions stainless steel impellers only as an option for unique applications.

Options and ordering information

The VGH literature lists a suction strainer, a hand primer and alternative gaskets and mechanical seals as options for fuel and petroleum-based duties, and stainless steel impellers for unique applications. Manuals, curves and outline drawings are obtained through the manufacturer. Provide the liquid, temperature, motor frame and speed with the enquiry, and note that the manufacturer guarantees every part and working component for 12 months according to the brochure.

In practice, a VGH4D selection starts from the pump curve rather than the maximum figures: the brochure gives the maximum capacity and head for each model, and the actual duty point sits somewhere along the curve for the trim chosen. Ask for the curve, the NPSH required and the motor power at the duty point before the motor frame is fixed, and compare the 5 x 4 inch VGH4C, which trades head for a slightly lower flow figure.

Frequently asked questions

Is the VGH4D self-priming?

No, it is a standard centrifugal pump; the brochure does not describe self-priming.

What flow and head are listed?

1400 GPM (88 lps) and 284 ft (87 m).

What impeller does it use?

An enclosed cast iron impeller with double curvature vanes and replaceable iron wear rings.

Can it handle fuels?

Alternative gaskets and mechanical seals and a suction strainer are offered for fuel and petroleum-based liquids; confirm for this model.

Which motor drive?

The bearing pedestal can be mounted to electric motors.

Documents and quotation

Brochure: VGH Series (AV-05500). See Pumps. Seven Star LLC is an independent supplier in Muscat; quote with motor and duty point.