AxFlow is now offering an innovative approach to reducing air consumption for larger size air-operated double diaphragm (AODD) pumps. Using the MizAir, it is possible to reduce air consumption by up to 50% with minimal loss of fluid flow.

Designed for close-coupling to the pump, MizAir requires just a 24VDC power supply. A self-powered ATEX version is to be introduced later in 2010. The microprocessor controlled MizAir consists of a high-flow normally open two-way valve and an electronic control unit. The valve and control unit operate to deliver precisely timed pulses of air to the pump at the start of each pump stroke. Because less air enters the pump there is less air to exhaust and this helps the pump to start its next cycle as there is less resistance to the return stroke. There is also major additional benefit of a reduction in the noise level of the exhaust air.

The MizAir utilises an internal pressure sensor to monitor the air being supplied to the pump,” explains Wilden Product Manager Peter Carfrae. “The characteristics of this signal enable the MizAir’s microcontroller to determine when the pump reaches the end of the stroke. This information is used to time precisely the pulses of air entering the pump.”

The MizAir is an intelligent device and is able to continuously monitor the speed and other operating parameters of the pump as well as make adjustments to the valve timing as required. The MizAir is low on power consumption and has a long life cycle. “It is a lightweight and compact unit that can be easily mounted directly onto the AODD pump and is tough enough to stand up to the potentially arduous operating conditions in which these types of pumps are used,” continues Peter Carfrae. “As AODD’s are sometimes seen as being expensive to run because of their need for a robust air supply, the MizAir is a great way of reducing air consumption and therefore reducing operating costs.

Picture: AxFlow