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CEM – Accumulator Tanks

£87.48£4,646.40

An accumulator tank is an important part of any pressurised water system that includes a pressure-controlled pump.

Our range of accumulator tanks are supplied in either polished stainless steel and white painted steel

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Description

CEM – Accumulator Tanks

An accumulator tank is an important part of any pressurised water system that includes a pressure-controlled or jet pump. Some modern computer-controlled pumps may not require an accumulator tank. Fitted close to the discharge port of the pressurised water pump, the accumulator tank acts as a pressure buffer, ensuring a smooth flow of water from the outlets. Without an accumulator tank, the pump is liable to switch itself rapidly on and off whenever its flow rate exceeds demand from the outlets. Constant on-off cycling leads to increased pump wear and unnecessary battery drain. The accumulator tank stops this rapid cycling, resulting in smooth water flow (important in showers) and extended pump life

An accumulator tank is much the same as an expansion tank however the pressure of the membrane should be set at a level just below the maximum pressure of the pump. The main sifference is that the tank stores the water pressure to avoid the pump system cycling (switching on and off frequently). An accumulator can also be used before the pump system to act as a buffer tank (sometimes referred to as a header tank)

Our range of accumulator tanks are supplied in either polished stainless steel and white painted steel, however, we can paint them in any colour that you require, just get in touch with us

CEM - Accumulators - Technical specs
CEM – Accumulators – Technical specs

FAQ’s

Why do I need an accumulator tank?

CEM - Technical Drawing of vertical Accumulator 50L
CEM – Technical Drawing of vertical Accumulator 50L

An accumulator tank is an important part of any pressurised water system that includes a pressure-controlled pump. (Some modern computer-controlled pumps may not require an accumulator tank, but see Section B – Expansion tanks.) Fitted close to the discharge port of the pressurised water pump, the accumulator tank acts as a pressure buffer, ensuring a smooth flow of water from the outlets. Without an accumulator tank, the pump is liable to switch itself rapidly on and off whenever its flow rate exceeds demand from the outlets. Constant on-off cycling leads to increased pump wear and unnecessary battery drain. The accumulator tank stops this rapid cycling, resulting in smooth water flow (important in showers) and an extended pump life.

Where do I fit an accumulator tank?

The accumulator tank should be fitted in the discharge line from the pump, as close as possible to the pump itself. The tank will serve only as a buffer tank if fitted in the pump inlet pipework

How do I install an accumulator tank?

The tank should be installed in a dry place. Tanks may be fitted in any attitude, vertical or horizontal. The tank may be secured by stout strapping or by stainless steel bands, or it may be mounted in a wooden cradle. The steel tank casing is robust, but care should be taken during installation not to scratch, dent or puncture it

CEM - Technical Drawing of horizontal Accumulator 50L
CEM – Technical Drawing of horizontal Accumulator 50L

What size of accumulator tank do I need?

This depends on the number of outlets in your system, their frequency of use, on the flow rate of the pump and on the space available. The larger the tank, the less frequently the pump will start, and the longer it will run before stopping

At what pressure should I set the accumulator tank?

The pressure in the tank is adjusted by means of the air valve in the closed end. The tank is supplied with an internal pressure of about 2.8 bar (35 psi). Reduce this pressure to 2 – 3 psi below the cut-in pressure of the pump (refer to pump instructions for details). This pressure adjustment is best done before the installation of the tank, using a car-type pressure gauge to determine when the required pressure is reached, as follows:

  1. Depress the central pin of the Schrader valve with your finger, to release gas
  2. Release gas a little at a time, until the pressure is correct
  3. If you release too much gas by mistake, air may be pumped back in with a hand – or foot-pump

If the tank pressure requires adjustment after installation, ensure first that the pump is switched off and that an outlet is open so that there is no pressure in the system. Then regulate the pressure as indicated above
Check the accumulator tank performance in this way every 6 months, and adjust the pressure if necessary

Winter precautions

To avoid the risk of frost damage, drain all the water from your pressurised water system, before winter lay-up. Switch off the pump, open all outlets until the flow ceases. This will allow water to be expelled from the accumulator tank. Drain all remaining water from the lowest point in the system. Remember to drain your calorifier from the bottom (cold-water inlet)

CEM Pumps and blowers page for accumulators

Additional information

Mounting

Vertical, Horizontal, Both

Capacity

2 Litre, 8 Litre, 20 Litre, 50 Litre, 100 Litre, 200 Litre, 300 Litre, 500 Litre

Tank Finish

Painted Steel, Polished Stainless

Downloads

CEM Pumps and blowers 50L Tank

CEM Pumps and blowers 50LV tank

CEM Pumps and blowers 100L tank

CEM Pumps and blowers 100LV tank