SANCAK Gate Valves with Elastomer Stem Seal are operated by turning the control shaft multiple times in a perpendicular position to the flow direction of the iron stem coated with EPDM Rubber. The fluid cleans the sealing surface every time the valve is opened. Iron stem coated with EPDM rubber provides hundred percent sealing. Short assembly length prevents covering large spaces. Actuator or gearbox can be assembled. It does not require maintenance, torque and pressure loss are low.