The 7000 Series mechanical metering pump from Neptune Chemical Pump Company eliminates the use of contour plates on the liquid side of the diaphragm, resulting in a simple, straight-through valve and head design that allows improved flow characteristics. It’s designed to handle clear liquids with viscosities ranging from water-like to 5,000 cPs. The capacity is manually adjustable via micrometer dial while the pump is running. This allows the pump to produce flow rates ranging from 10 to 450 gph at head pressures up to 150 psi. Its liquid ends are constructed of PVC with explosion-proof, variable-frequency drive and washdown-duty motor options available. It is also self-priming. 215/699-8700; www.neptune1.com.