What is the difference between VE and VK valves? What makes the orange handle valves industrial, as they look to be made of the same material?
VE ball valves (blue handle) are designed for water transfer. VK or VKD ball valves are designed for industrial processes. The VKD offers teflon ball seats (VE has PE), can be supplied with EPDM or FPM(viton) seals (VE with EPDM only), VKD has batch number identification, a pressure rating on PN16 for all sizes, lockable handle, and an inline micro adjustment feature.