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 Hydra-Cell Pro Metering Pumps

Use the navigation bar above for listing of metering pumps by flow rate and pressure

 

Diaphragm Metering Pump

What are metering pumps?

A metering pump is designed to transfer a precise volume of fluid and are characterized by their accuracy.  One of the standards we often refer to is the American Petroleum Institute (API) Standard 675, which stipulates performance characteristics for controlled volume positive displacement pumps.

We offer two brands of metering pumps, the Hayward Z series (available with either analog or digital interface) and the Wanner™ S & P series.  All are positive displacement pumps utilizing one or more diaphragms to displace precise volumes of fluid with the primary difference being that the Wanner™ P series is capable of higher pressures and there are more models contributing to a broader range of flows.

 

How to choose a metering pump?

Start by defining the performance parameters such as the flow rate (and range if it is to be variable) and the pressure required.  Generally speaking if it falls within the capabilities of the S or Z Series, this will be your least expensive option.  The P Series is generally applied to difficult fluids, higher flow rates and pressure and for applications requiring a high level of user feedback or control.

 

Comparing the S & Z series metering pumps, the Z series offers more features than the S Series where they overlap, although most of the Z series pumps have higher flow and pressure capabilities compared to the S series.


 

P Series 0.06 to 843 GPH, up to 3,500 PSI

Wanner P Series Metering PumpsThis series of metering pumps consists of six models and are capable of high pressures.  The P series is a completely different style of metering pump than the S and Z series style solenoid driven metering pumps.  The P series is based upon the Wanner Hydra-Cell™ design, using one or more hydraulically balanced diaphragms to precisely dose fluids in compliance with API 675 performance standards of linearity, repeatability and accuracy.

 

Thus the P Series metering pumps have a broader application base, not only due to their higher pressure capabilities but also due to their sealless design which lends itself to pumping viscous, abrasive and other "difficult to handle" fluids such as isocynates, polyols, blowing agents, catalysts, acids and de-ionized water.

 

Unlike the commodity style S and Z Series metering pumps, the P series flow rate is dictated by the shaft speed of the pump motor.  The pump motors typically operate at 1800 RPM and a gearbox is used to mechanically reduce the pump shaft speed.  The flow rate can only be varied by varying the pump shaft speed, which is typically achieved using a programmable variable frequency drive (VFD).

 

When in doubt, Call us at 908.362.9981 to speak with a sales engineer! The best way for us to begin assisting you is to use our online application based inquiry form; we can usually reply with a proposal within 24 hours.