Aquamist Replacement 160psi water pump for HFS/2/3/4/6

Increased from 160psi to 250psi

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SKU

806-582

Replacement water 160psi pump for the HFS2/3/4 system. (without fittings and fixing hardware). The pump pressure can be adjusted to in excess of 280psi with a 1/16" allen key on the front of the pump (clockwise).

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Details

There are two good reasons why one should not increase the pressure unnecessarily.

1. Power obeys the I/square law. If the bypass pressure is increased from 160psi to 250psi, the average current draw will increase from 7A to 11A. Power dissipation will be more than doubled. Using the I^2 R formula, the power will effectively increase from 49W to 121W under the same load (R). Power increase is proportional to operation temperature rise, the pump will run much hotter. Aquatec (manufacturer) advise against pressure over 180psi for long term reliability.

The motor used is a permanent magnet type, semi-sealed without cooling channel for air. Winding is the on the rotating spindle so there are no chance of cooling by conduction. Having a large heat sink on the back of the pump will do nothing other than delay the onset of the thermal cut out.

2. Pre-mature mechanical wear on the diaphragm is imminent. Resulting internal valve wear, reducing pump efficiency and bearing load. Do contact Aquatec to have this confirmed.

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FAQ(5)

Customer Questions

Why should one not increase the pressure unnecessarily?

There are two main reasons not to increase the pressure unnecessarily. Firstly, increasing the bypass pressure can lead to a significant increase in power consumption, causing the pump to run hotter and potentially reducing long-term reliability. Secondly, it can result in premature mechanical wear on the diaphragm, affecting pump efficiency and bearing load.

What are the consequences of increasing the bypass pressure?

Increasing the bypass pressure can lead to a significant increase in power consumption, causing the pump to run hotter and potentially reducing long-term reliability. It can also result in premature mechanical wear on the diaphragm, affecting pump efficiency and bearing load.

What is the recommended maximum pressure for long-term reliability?

Aquatec advises against pressure over 180psi for long-term reliability due to the potential increase in power consumption and risk of premature mechanical wear on the diaphragm.

What type of motor is used in the pump?

The pump uses a permanent magnet type motor that is semi-sealed without a cooling channel for air. The winding is on the rotating spindle, so there is no chance of cooling by conduction. Adding a heat sink on the back of the pump will not effectively prevent overheating.

How can one confirm the potential mechanical wear on the diaphragm?

To confirm potential mechanical wear on the diaphragm and its consequences, it is recommended to contact Aquatec for further evaluation and guidance.

Compatibility