Through conduit slab gate valve with fully bore through conduit port, rising stem OS&Y and floating seat with overlay stellite, double block & bleed performace, self cavity relief and minimizes and eases the maintenance allowing for the service operations to be done without the removal of the valve from the indusril pipeline operated by handwheel, electric actuator, pneumatic actuator. Such type of slab gate valve is simple solid gate design, featuring metal-to-metal seal between gate and seat and they are normally used for oil & gas pipeline services. The design and manufacture standard can be API 600 and API 6D. Valve material covers carbon steel, stainless steel, alloy steel, duplex steel etc, such as WCB, LCB, WC6, WC9, C12, C5, CF8, CF8M ect. Valve avaiable pressure range from class 150 to class 2500 matching valve size from 2" to 48".