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Product code: NGX Series

Calpeda NGX Series Horizontal Self Priming Shallow Well Pump

Pump Type - Self Priming Centrifugal

Max Flow Rate M³H - 8.4 M³H

Max Head - 46.5M

Pump Materials - AISI304, Brass

Max Temp - 35°C

Max Viscosity - 10 cst

Max Solid Passage - 0mm

Self Priming - N

Inlet/Outlet Sizes - 25mm to 32mm

Drive - AC Electric

Max Suction Lift - 0

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DESCRIPTION

Calpeda NGX Series Horizontal Self Priming Shallow Well Pump

Flow Rate	Up to 8.4m³/hr
Head (Pressure)	Up to 46.5m
Inlet/Outlet Sizes	1” to 1 1/4”
Operating Temperature	0°C to +35°C
Drive Options	Electric Motor

The Calpeda NGX series of self priming well pump is designed for extracting water from shallow wells. It comes complete with a built in ejector that allows it to perform suction lifts as high as 9m within 4 minutes. This well pump is constructed with a stainless steel 304 casing and a brass impeller.

Common applications include; extracting water from a well, lifting water that contains large amounts of air or gases, boosting water pressure, garden use or jet washing. Pumped fluids must be clean and free of solid or abrasive particles.

The largest self priming well pump models are capable of producing pressures up to 4.65 bar and flow rates up to 8.4m³/hr.

This Calpeda pump range is supplied with BSP connections as standard.

Motor options include 230V single phase 50Hz and 230V/400V three phase 50Hz, other voltages and 60Hz motors are available on request.

Product Summary

• Horizontal close coupled self priming shallow well pump

• Can perform suction lifts up to 9m within 4 minutes

• Compact design

• Single piece, thick barrel casing

• Suitable for clean fluids without solids or abrasives

• Constructed with stainless steel 304 casing and brass impeller

• BSP connections as standard

• Motor options include; 230V/1Ph/50Hz and 230V/400V/3Ph/50Hz, other voltages and 60Hz available on request

• Filling and drain plugs on pump casing

• IP54 as standard

FAQS

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.

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.