This is a Walchem metering pump repair part - a CAN-2VE-8 VALVE, INJECTION, 1/2 VE HI-PR, EWN. It is designed for use with Walchem EWN series metering pumps. The valve is an important part of the metering pump that helps to regulate the flow of the chemical being injected. This particular valve is designed for high-pressure applications and has a 1/2-inch size.