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Product code: MGHP High Pressure Modular Gear Pump

North Ridge MGHP High Pressure Modular Gear Pump

Name: North Ridge MGHP High Pressure Modular Gear Pump
Brand: North Ridge

Pump Type - Gear

Max Flow Rate - 7.7M³H

Max Head - 300M

Pump Materials - AISI304, AISI316, Cast Iron, Cast Steel

Max Temp - 100°C

Max Viscosity - 5500 cst

Max Solid Passage - 0mm

Self Priming - Y

Inlet/Outlet Sizes - 19mm to 38mm

Drive - AC Electric, Bareshaft

Max Suction Lift - 8M

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DESCRIPTION

MGHP High Pressure Modular Gear Pump

Overview

Our Modular External Gear Pumps (MGHP) are designed to handle clean low to medium viscosity lubricating fluids. Due to their positive displacement design these units are suitable for high pressure applications up to 30 bar, depending on the selected model configuration and fluid being pumped.

Working Principle

A Modular Gear Pump is a type of External Gear Pump used for the transfer of viscous fluids at low speed. Two sets of interlocking gears are offset within the pump head, with 2 gears located at the front of the pump head, and 2 to the rear to ensure the rotary forces remain balanced.

Gears are mounted above each other, with one gear driven by the motor, while the other is driven by the rotating gear.

Liquid enters the spaces between teeth before travelling around the outer casing towards the discharge. Fluid does not flow between meshing teeth.

Its simple construction involving only two rotating parts with tight clearances is one of the secrets of our gear pumps high efficiency. As there is virtually zero slip whilst the unit is in operation, it serves as a great option for use within metering applications where a consistent flow of non pulsating flow is required.

This design of pump enables pressures of up to 20 bar to be produced, with less noise generated than an internal gear pump due to the internal gear design and working movement.

Due to the tight clearances between gears, these pumps are only suitable for lubricating clean liquids.

Our modular gear pumps can be supplied with external bypass valve for pipework and unit protection and heating or cooling jacket for maintaining of fluids temperatures upon request.

This pump range is available with a variety of seal types such as mechanical seal, cartridge seal, packing seal and lip seals.

Our pump's high efficiency means their energy consumption is minimal making them consequently a great option for continuous operation.

Uses

Due to units being available in a variety of materials, pump sizes, sealing options and handling up to 30 bar operating pressure, our modular gear pumps can be used for a wide range of applications involving low to medium viscosity liquids which are non-abrasive, lubricating and clean.

Due to their rotary positive displacement design, their output flow is non-pulsating enabling their use in metering applications. Some of the most common fluids our modular gear pumps are used for are fuels, oils, grease, resins and adhesives in continuous applications.

Certification

Our Range are available with ATEX (explosion proof) (UKCAEX) motors for hazardous environments and applications, Units are manufactured according to UKCA and CE standards, complying with all UK and European regulations.

These pumps are also available with marine class certification upon request.

Performance Table

Flow Rate	Up to 7.7 m³/hr
Head (Pressure) Range	1 - 30 bar
Sizes Available	3/4” / 1” & 1/12”
Operating Temperature Range	0 - 100°C
Viscosity Range	20cst – 5,500cst
Drive Options	Electric Motor + Gearbox
Power Range	0.37 –11 kW
Construction Materials	Cast Iron, Cast Steel, AISI 304 – 316 Stainless Steel

Design Features/Benefits

Available with several sealing options – cartridge seal, packing, single mechanical seal, lip seal etc.

ATEX certified upon request

Supplied with threaded connections

High Efficiency due to exceptional tight clearances

Fantastic self-priming capabilities

Max. fluid operating temperature up to 100 °C

Optional external heating jacket

Manufactured according to CE standards

High pressure pump (Up to 30 bar)

Available with external bypass valve and heating jacket

Marine class certification upon request

Typical Applications/Fluids:

• Coolant

• Kerosene/gasoline

• Diesel fuel

• Hot oil

• Grease

• Bitumen

• Asphalt

• Edible oils

• Crude oil and fuel oil

• Paint, resins, emulsions and coatings

• Soap and detergents

• Food process plants

• Heat transfer

Learn more about Gear Pumps in our guide

FAQS

Can this pump run dry?

No, definitely not! Gear pumps will incur damage even after short periods of dry running. Firstly, the gears require lubrication from the pumped fluid, for example fuel and oil. Dry running without these will cause fast and irreversible damage. The mechanical seal requires lubrication and cooling while the pump is operating. Without the presence of fluid, the mechanical seal will overheat and crack, and this may cause the pump to leak and fluid to enter the motor. There is also the possibility that the motor will burn out. Our advice is to ensure that the pump always has access to fluid while running, the vessel or sump on the inlet side of the pump must never run out of fluid while the pump is active. Level sensors or a float switch can be installed in the fluid chamber ensuring that the pump is turned off in the event there is no fluid. Another way of protecting the pump is to fit a dry running device, this will turn the pump off if it detects that no fluid is entering the pump. If you think that dry running is inevitable, then please speak to us and we will try to select a more suitable pump for your application.

What does the term self-priming mean?

A pump must be primed in order to operate correctly, this means that the pump casing and inlet pipe must be filled with fluid and the air removed before operation. This needs to be done manually by the pump operator for a non-self-priming pump each time the pump is used to avoid damage from dry running. A self-priming pump removes these issues by completing the priming process automatically. The air is removed from the inlet pipework and pump casing when the pump is activated. Self-priming pumps are particularly useful for installations with a suction lift on the inlet side of the pump, the pump will draw the fluid up the pipework by creating a vacuum and removing any air that is present. In ideal conditions, a self-priming pump can lift fluids up to around 8m on the inlet side, however this figure is affected by fluid viscosity, pipework bore and other installation conditions, therefore this figure can be much lower from case to case. Allowances must also be made for wear and tear; suction lift capabilities will be much lower for older and worn pumps.

What viscosity can this pump handle?

Please be aware that the figures displayed relate to the largest pump from this range of products, not specific models. For details on viscosity for specific models, please refer to datasheets or contact a member of our sales team.

How do I know what size pump and motor speed is correct for my application?

A clear picture of the pump system is required to make an accurate selection. The main pieces of information required include; a description of the application, bore of pipework, the fluid, viscosity, size and type of solids, flow rate and pressure/head. With these pieces of information, a pump can be sized correctly to ensure it delivers the required flow rate and pressure and that is also operates at its best efficiency point to lower lifetime costs. Knowing if the pump is running intermittently or continuously also allows the correct motor speed to be selected. For instance, a pump running continuously 24/7 will require a slower speed motor rather than a full speed motor. Running the motor slower and oversizing the pump will reduce wear of the motor and the pump, therefore lowering maintenance costs during their lifetime.

How does a bypass work and do I need one?

An integral bypass is designed to protect the pump and system from overpressure for small periods of time. It is typically set to around 10% higher than the working pressure, it will open and recirculate the fluid inside the pump head when the set pressure is achieved. An integral bypass is only a temporary solution and cannot operate indefinitely, an additional external bypass that runs back to the fluid source is always recommended as a more permanent solution.

What do the terms Atex and explosion proof mean and why are they so important?

ATEX is an abbreviation of “Atmospheres Explosibles”. It is a regulation set out by the European Union to ensure the safety of products that are used to handle flammable products or are installed in environments containing flammable gases, vapours, mists or combustible dusts. For instance, if the pump is being installed in an explosive environment, then only the motor needs to meet the Atex standard stopping it from causing a spark during operation and igniting the atmosphere. However, if the fluid being pumped is flammable, then the pump will also need to meet Atex standards to ensure that no sparks are caused inside the pump itself when the fluid goes through it. It is crucial that an Atex rated pump or motor are used for applications involving explosive environments or flammable fluids, using a non-Atex pump or motor in these situations is extremely dangerous and contravenes health and safety standards.

What is NPSH and why is it so important?

NPSH is an acronym for Net Positive Suction Head. NPSH measures the absolute pressure present in a fluid.

There are two main ways that NPSH is expressed in a pump system

NPSHa - This is the amount of Net Positive Suction Head available at the pump inlet. NPSHa demonstrates the amount of pressure acting on a fluid as it enters the pump. This measures the amount of pressure between the liquid staying in its current state and forming vapour bubbles (beginning to boil).

NPSHr - This is the amount of Net Positive Suction Head that the pump requires to operate without experiencing the damaging effect of cavitation, thus causing a dramatic reduction in pump performance.

It is very important to pay attention to these values when making a pump selection. Selecting a pump that requires more NPSH than is available in your system will cause fast and long-lasting damage to the pump and thus you will incur large repair costs and downtime.