Gate valve basic knowledge Gate valves are linear motion valves in which a flat closure element slides into the flow stream to provide shut-off. They are one of the most common valves used in many industrial applications including the oil and gas industry, pharmaceuticals, manufacturing, automotive and marine service. Advantages: ·Good shut off ability ·Gate valves are bidirectional and therefore they spare the worry for installment direction like globe valves or check valves. ·Pressure loss though the valve is reduced to minimum. Disadvantages ·Gate valves can not be switched quickly. ·Unable to regulate or throttle the flow ·Sensitive to vibration. What is API 6A API is the American Petroleum Institute and spec 6A is the International Standard that specifies requirements and gives recommendations specifically for wellhead and Christmas tree equipment that used in the petroleum and natural gas sector. API 6A valves are designed for the demanding e...