Hughes Pumps HP500 Pump | High Pressure Seawater Pump up to 1400 Bar

The Hughes Pumps HP500 Pump is a high pressure quintuplex plunger pump designed for demanding seawater and industrial pressure applications. Rated up to 1400 bar at 147 lpm and capable of flows up to 806 lpm at 250 bar, the HP500 is built for high duty offshore, marine, and industrial systems where both high pressure and high flow are required. The product page visual on page 1 highlights these maximum figures, while the performance table on page 2 shows the wider operating range across different plunger sizes.

For seawater applications, the HP500 is available with a duplex stainless steel pump head on high volume versions only. An optional 431 stainless steel pump head is also available, allowing the pump to be configured for different operating requirements.

The pump is available with a choice of gear ratio to suit either diesel engine or electric motor drive arrangements. For compact installations, an SAE adaptor housing in SAE 1 or 3 can be supplied for flange mounting the pump to a diesel engine flywheel housing, helping create a compact, aligned installation while enclosing moving parts. The HP500 can also be supplied as a bareshaft pump only or as part of a complete unit build.

Internally, the HP500 uses an in-line valve arrangement for maximum efficiency and to reduce the adverse effects of cyclic stress in the pump head. It also features interchangeable plunger kits, a hardened alloy steel crankshaft with heavy duty roller and steel-backed white metal main bearings supported between each connecting rod, an SG iron crankcase with pressure lubrication, oil filtration, and oil cooling, and forged connecting rods with low friction shell type big end bearings and lead bronze lined small end bushes. The pump is gear driven, eliminating the need for belt drive. The datasheet also notes that 5 cylinders provide very smooth output.

The HP500 can be supplied with options such as a pressure gauge, safety valve or burst disc, and solid tungsten carbide or ceramic plungers with self-adjusting seals. Hughes also highlights strong seal, plunger, and valve life to support dependable operation in demanding duty cycles.

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Key Features

• Maximum pressure up to 1400 bar

• Maximum flow up to 806 lpm

• Maximum power 375 kW / 500 HP

• Quintuplex pump design with 5 cylinders

• Duplex stainless steel pump head for seawater applications on high volume versions only

• Optional 431 stainless steel pump head

• Choice of gear ratio for diesel engine or electric motor drive

• Optional SAE adaptor housing for compact engine mounting

• Available as bareshaft pump or complete unit build

• In-line valve arrangement for efficiency and reduced cyclic stress

• Interchangeable plunger kits

• Hardened alloy steel crankshaft

• Heavy duty roller and steel-backed white metal main bearings

• SG iron crankcase with pressure lubrication, oil filtration, and oil cooling

• Gear driven design

• Optional pressure gauge

• Optional safety valve or burst disc

• Optional solid tungsten carbide or ceramic plungers

• ATEX compliant

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Typical Applications

The Hughes Pumps HP500 Pump is suitable for a wide range of high pressure duties, including:

• High pressure seawater pumping

• Offshore and marine pressure systems

• Industrial high pressure water applications

• Engine driven or motor driven pump packages

• Applications requiring compact flange-mounted pump arrangements

• Systems requiring very high flow and high pressure performance across multiple plunger sizes and gear ratios

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Why Choose the Hughes Pumps HP500 Pump?

The HP500 offers a very broad performance envelope, allowing operators to configure the pump for either higher pressure or higher flow depending on the plunger diameter and gear ratio selected. This makes it well suited to applications where process requirements vary and a single fixed duty point would be too limiting. The performance table on page 2 shows the operating spread from 32 mm plungers at 1400 bar through to 75 mm plungers at 806 lpm and 250 bar.

Its high-flow capacity, seawater-capable duplex pump head option, compact drive arrangements, and robust mechanical construction make it a strong choice for offshore and industrial environments where reliability, service life, and installation flexibility are important. The 5-cylinder layout also supports smoother output compared with lower-cylinder configurations.

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Technical Specification

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Performance Range

The performance table on page 2 shows multiple configurations depending on plunger diameter, gear ratio, and input speed. The available plunger diameters are 32 mm, 38 mm, 45 mm, 50 mm, 60 mm, 70 mm, and 75 mm, with maximum pressure reducing as plunger size increases and flow rising accordingly. The same table notes that flowrates are theoretical and reduce by approximately 7.5% at full pressure, with a 100 mm pump stroke.

Example Operating Points

These figures are taken from the upper performance range shown in the page 2 table, which illustrates the HP500’s operating envelope across different plunger and speed combinations.

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Frequently Asked Questions

What is the maximum pressure of the Hughes Pumps HP500 Pump?

The HP500 is rated up to 1400 bar at 147 lpm.

What is the maximum flow of the HP500?

The maximum listed flow is 806 lpm at 250 bar.

Is the HP500 suitable for seawater use?

Yes. The datasheet lists a duplex stainless steel pump head for seawater applications, although this is noted as being for high volume versions only.

Can the pump be driven by either an engine or an electric motor?

Yes. The HP500 is available with a choice of gear ratio to suit diesel engine or electric motor drive.

Is there a compact engine mounting option?

Yes. An SAE adaptor housing is available in SAE 1 or 3 for flange mounting to a diesel engine flywheel housing.

Is the HP500 available as a pump only or as a package?

Yes. It can be supplied as a bareshaft pump only or as a complete unit build.

What design features support durability?

The pump uses an in-line valve arrangement, hardened alloy steel crankshaft, heavy duty roller and steel-backed white metal main bearings, SG iron crankcase with pressure lubrication, oil filtration, and oil cooling, and forged connecting rods. Optional solid tungsten carbide or ceramic plungers are also available.

Is the Hughes Pumps HP500 Pump ATEX compliant?

Yes. The datasheet lists the HP500 as ATEX compliant.

What is the benefit of the quintuplex design?

The datasheet states that the 5-cylinder layout provides very smooth output, which can be beneficial in high pressure systems requiring steadier flow delivery.

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Enquire about the Hughes Pumps HP500 Pump

For technical details, pricing, or project support:

Email: info@isubc.com

Phone: +44 (0)1253 767788