Walchem Corp.'s EHE chemical metering pump has outputs up to 20 gal/hr and pressures up to 150 psi. It is suitable for water and wastewater chemical feed applications. A range of liquid-end options is available for disinfection, pH adjustment, corrosion control, coagulation/flocculation and fluoridation. Tightly guided check valves and up to 360 strokes/min ensure fast priming and smooth, uniform chemical injection.