Extended rod stop valve, stop valve

The extended rod stop valve, in its literal sense, refers to the elongation of the valve stem of the stop valve. Generally, when the installation of the valve stem pipeline requires that the stop valve be buried underground beyond the ground depth by 15 meters, it is necessary to reasonably extend the valve stem of the stop valve according to the actual requirements of the construction site, so that workers can operate the stop valve and observe from the ground. The valve stem undergoes quenching and surface nitriding treatment, which has good corrosion resistance and friction resistance. The valve stem is integrated as a whole, without using a segmented welding structure, and is stable without shaking, ensuring safety and reliability.

Features of the extended rod stop valve

The extended rod stop valve can be installed at any position of the pipeline. Usually, small-diameter and low-pressure stop valves can choose the low-in-high-out installation, which is convenient for opening and closing, and at the same time, when the valve is in the closed state, the middle flange gasket between the valve body and the valve cover and the packing in the valve stem stuffing box are not under pressure, greatly extending the service life of the valve, reducing the possibility of leakage of the valve, eliminating the need for frequent maintenance, and reducing labor costs. For large-diameter stop valves, due to poor sealing performance, a high-in-low-out structure is usually adopted. By using this method, when the valve is in the closed state, the medium pressure acts on the valve disc, increasing the sealing performance of the valve.

The extended rod stop valve has multiple application scenarios. Here are its main application areas: 

Underground installation: When the valve stem pipeline installation requires that the stop valve be buried underground beyond the surface depth by 15 meters, the valve stem of the stop valve should be reasonably extended according to the actual requirements of the construction site, so that workers can operate and observe the stop valve from the ground level. 

Power Industry: The extended rod power station stop valve, as a new type of power transmission equipment, mainly functions to quickly cut off and restore power transmission in high-voltage power transmission lines, effectively reducing line losses and improving transmission efficiency. According to relevant research, after using the extended rod power station stop valve, the loss of power transmission lines can be reduced by 5% to 10%. 

Low-temperature environment: When selecting the material for low-temperature shut-off valves, it is necessary to consider the possible low-temperature brittleness of the metal materials. Apart from austenitic steel with a face-centered cubic crystal lattice, copper, aluminum, and other general steels will exhibit low-temperature brittleness when in a low-temperature state, thereby reducing the strength and service life of the valve. Aluminum does not exhibit low-temperature brittleness at low temperatures, but due to the low hardness of aluminum and aluminum alloys, the wear resistance and scratch resistance of the aluminum sealing surface are poor. Therefore, the use of aluminum in low-temperature shut-off valves is limited and is only selected in low-pressure and small-diameter valves.

Packing of Standard Packing: 

Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 470 gallon liquid totes Special package is available on request. E FORUs’  is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition