The E46VC HEAD ASSEMBLY is a repair part for Walchem metering pumps, specifically the EHE46 model. It includes the pump head assembly, which is responsible for housing the pump's diaphragm and controlling the flow rate of the chemical being pumped. The E46VC head assembly is designed for use with VC-type valves, which are used for injection of chemicals under high pressure. It is a replacement part that can be used to repair a malfunctioning or damaged pump head, extending the life of the pump and saving on replacement costs.