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Product code: XR320

XR320 Self Priming Centrifugal Pump

Name: XR320 Self Priming Centrifugal Pump
Brand: North Ridge

Pump Type - Self Priming Centrifugal

Max Flow Rate - 120M³H

Max Head - 36M

Pump Materials - AISI316, AISI316L, Bronze, Ductile Iron

Max Temp - 120°C

Self Priming - Y

Inlet/Outlet Sizes - 80mm

Drive - AC Electric, Engine

Max Suction Lift - 8M

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DESCRIPTION

XR320 3” Self-Priming Centrifugal Pump

The XR320 is part of the North Ridge XR series - a line of self-priming centrifugal pumps that are designed for heavy duty operation within the construction, industrial, emergency and marine industries.

Designed for the handling of clean, solid laden, flammable and abrasive liquids, its unique internal armoured volute protects the main pump casing from wear and fluid contact, by absorbing any impact from the pressurised liquid.

The XR series are rapid self-priming pumps, capable of priming from 4M in under 2 minutes due to its uniquely designed double-curved impeller optimised for high efficiency (up to 74%) without compromise to solid passage and priming time. This model can handle solids up to 40mm x 35mm in size.

Each pump within the XR series is also constructed with an enduring design philosophy. A wide range of material options are available ranging from Cast Iron to Bronze, Stainless Steel and hardened material alternatives. This allows for maximum efficiency in any application as well as providing reliability and longevity. Our unique construction means many ranges share the same internal parts reducing stock holding of associated spare parts across models.

To finalize construction and design, a hard-faced mechanical seal ensures resistance to solids - even those not foreseen, with an integrated heavy-duty bearing housing on long coupled designs ensuring durability for arduous and rugged operation over extended periods.

The North Ridge XR series has many benefits:

· Self-priming operation from 4m vertical in under 2 minutes, and up to 8m vertically from dry

· ATEX Certified in EEx b, c or d, for use with flammable fuels and liquids in hazardous atmosphere

· Robust design allows for operation in heavy industrial environments with superb reliability

· High levels of operationally efficiency (up to 74%) due to the double curved open impeller design reducing energy consumption

· Easy maintenance and cleaning through the design of large inspection hatches

· All Parts are easily replaceable for on-going operation, with screws not used within fluid contact areas

Product Summary

· Under 2-minute self-priming operation

· Customizable material construction for effective use across demanding industries

· ATEX Rated and capable of handling clean, solid laden, flammable and abrasive liquids

· Efficient design for maximized operational performance and reduce power consumption

· Robust design for heavy duty applications

· Easy maintenance and cleaning

· Open impeller design

· Available in bareshaft, or with electric, engine or hydraulic motor

· Available with mobile trailer if required

· Marine Type approved motor available on request

FAQS

How do you use a self-priming pump and how does this pump self prime?

The pump is usually installed above or adjacent to the tank it will be transferring from. After all piping connections have been made, the casing is then filled with enough liquid to cover the impeller, enabling the pump to prime by separating air and fluid within the casing.

The fluid recirculates within the casing creating a vacuum drawing air and fluid from the tank. Air will exit the pump via the outlet due to its working motion with fluid exiting the pump only once the casing is completely filled with liquid. The pump can be controlled manually via wired connections, or automatically via level controls.

What does the term self priming mean?

Self-Priming means the pump can be located above a fluid, and draw fluid into the pump without issue. There are various types of self-priming pumps utilizing different technologies which are selected based on the fluid being pumped, its viscosity, temperature, presence of solids, hours of operation and process conditions.

Can this pump run dry?

Due to the casing design, a certain amount of fluid always remains in the pump when the unit is not in operation. This means the pump can run dry without fluid for a limited amount of time – typically 30 minutes.

It is always recommended to avoid dry running with centrifugal pumps if possible as the pumped fluid is used to lubricate and cool internal parts. 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.

Why is the volute casing a different material to the pump casing?

Typically self priming pumps utilize a sacrificial part known as a wear plate to absorb wear and impact from solids within a pump.

In our design the volute casing, also known as an armoured volute, surrounds and protects the internal pump casing by absorbing any impact from fast moving abrasive particles transferred at pressure by the impeller.

As it bears the main force of impact, and is in more contact with the fluid it is typically in a higher grade of material than the casing. Conversely as the casing does not experience pressure generated from the impeller, or solids at high velocity, a different grade of material is used without compromise to pump lifespan.

What are the typical applications?

Typical applications for this pump include effluent transfer, waste water transfer, dewatering, fuel transfer, slurry transfer, irrigation and for use in washing plant.

Can this pump be used instead of a submersible pump?

Yes, this pump can be installed in a dry area above the sump if the suction lift height does not exceed 8m. A surface mounted pump has many benefits over a submersible pump, one main benefit being that it is easier the access and maintain the pump.

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, 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 4 pole motor rather than a 2 pole 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.

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.

What does the term best efficiency point (BEP) mean and why is it so important?

The best efficiency point or BEP is a point along the pump performance curve that indicates where efficiency for the pump peaks. When selecting a pump, you must try and get as close to the BEP as possible to ensure that the pump is at maximum efficiency when operating. The closer to the BEP the pump is when operating, the lower the energy costs will be, thus saving significant amounts of money during the pump’s lifetime. Also, vibrations will be at their lowest meaning maintenance costs are lower and the lifespan of the pump is maximised. It is very important to pay attention to the BEP when your pump is selected, as an oversized or undersized pump could cost you significant amounts of money.