Our 4400 Series is an electric driven injector that can utilize any of our four plunger sizes or any of the three gear ratios with either a single head or up to eight heads for a combination of pressure and volume requirements. The pump volume can be changed with a simple turn of a micrometer knob from 0-100% of capacity. Discharge pressures up to 5000 psi, available as well as corrosion resistant trim.