API 6A Slab gate valve is a unique wellhead valve used in oilfields and made to manage flow stream.API 6A Slab gate valves are generally used as a part of oilfield tool, which jobs under high pressure, such as wellhead assembly, Christmas tree, choke manifold, frac trees, debris catcher, line heater, kill manifold, etc. API 6A gate slab valve is used during well testing, flowback, oil generation.API 6A Slab gate gate valve is either running manually or by hydraulic actuator.