Forged Steel Flanged Ball Valve

Forged steel ball valves are designed, selected, manufactured, tested, surface treated and painted in strict accordance with NACE standards of the American Society of Corrosion Engineers according to user requirements and to meet the requirements of vulcanization application cracking in the vulcanization environment.

This series of ball valves not only have a wide range of materials, but also the inner parts are made of nickel plated surface materials, and the sealing ring is made of special polymer materials. The valve is not only anti-corrosion, but also has strong sulfur resistance, good fire prevention, anti-static and sealing performance. It has a wide range of operating pressure and temperature, and is equipped with full bore and reducing bore. It can also be equipped with a variety of driving devices. It is an ideal valve choice for chemical industry, oil torch refining, and natural gas exploration and transmission systems.

Main functions:

n case of abnormal pressure rise due to temperature change of the stagnant medium in the valve cavity, the medium pressure will push the valve seat away from the ball to achieve the effect of automatic pressure relief, and the valve seat will automatically reset after pressure relief.

In addition to general sealing, the valve seat has a special sealing structure, which can play an emergency rescue role in case of leakage due to seal ring damage.

When the valve seat sealing ring is burnt or softened due to fire or abnormal temperature. The operation of the valve is still reliable. At the same time, the valve seat and the ball form a metal to metal sealing function, which prevents the further expansion of the fire and complies with the provisions of AP16FA.

Unscrew the discharge device to check whether the valve seat leaks, or discharge the residues in the middle chamber to reduce the pollution of the medium on the valve side. In the working state, when the valve is fully open or closed, the stuffing box of the valve stem can be replaced.

The valve stem is sealed with PTFE packing and O-ring, which is especially suitable for gas medium. High quality SF self-lubricating bearing is adopted for the moving part of the valve rod, which makes the friction coefficient smaller and reduces the operating torque.