Hughes Pumps HP300 Pump | High Pressure Seawater Pump up to 1400 Bar

The Hughes Pumps HP300 Pump is a high pressure plunger pump designed for demanding seawater and industrial pressure applications. Rated up to 1400 bar at 88 lpm and capable of flows up to 484 lpm at 250 bar, the HP300 offers a strong combination of high pressure and high flow performance for offshore, marine, and industrial duty.

For seawater applications, the HP300 is available with a duplex stainless steel pump head on high volume versions only. An optional 431 stainless steel pump head is also listed, 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. This helps create an extremely compact, aligned installation while enclosing moving parts. The HP300 can also be supplied as a bareshaft pump only or as part of a complete unit build.

Internally, the HP300 uses an in-line valve arrangement for maximum efficiency and to prevent 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 lists 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.

Key Features

• Maximum pressure up to 1400 bar

• Maximum flow up to 484 lpm

• Maximum power 225 kW / 300 HP

• 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

Typical Applications

The Hughes Pumps HP300 Pump is suitable for a 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 high flow and high pressure performance across multiple plunger sizes and gear ratios

Why Choose the Hughes Pumps HP300 Pump?

The HP300 offers a 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 operating requirements vary and a single fixed duty point would be too limiting.

Its high-flow capacity, seawater-capable 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.

Technical Specification

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 HP300’s wide operating envelope across different plunger and speed combinations.

Frequently Asked Questions

What is the maximum pressure of the Hughes Pumps HP300 Pump?

The HP300 is rated up to 1400 bar at 88 lpm.

What is the maximum flow of the HP300?

The maximum listed flow is 484 lpm at 250 bar.

Is the HP300 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 HP300 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 HP300 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 HP300 Pump ATEX compliant?

Yes. The datasheet lists the HP300 as ATEX compliant.

Enquire about the Hughes Pumps HP300 Pump

For technical details, pricing, or project support:

Email: info@isubc.com

Phone: +44 (0)1253 767788

Hughes Pumps HP300 Pump | High Pressure Seawater Pump up to 1400 Bar

The Hughes Pumps HP300 Pump is a high pressure plunger pump for seawater and industrial applications, delivering up to 1400 bar and 484 lpm with duplex stainless steel pump head options and compact engine or motor drive configurations.

Product SKU: HP300 Pump

Product Brand: Hughes Pumps