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How long does a cast steel gate valve last?

How long does a cast steel gate valve last?

How many years is the service life of cast steel gate valve? Generally, at normal temperature, the medium is water and there is no high-strength hydraulic impact. Most cast steel gate valves can be used for 3 years and 5 years. The contract signed between the manufacturer and the customer states that the warranty period is one year, so it is necessary to eliminate the situation that the customer changes the working conditions at will. Cast steel gate valve can be used under the working condition of about 300 degrees

Generally, at normal temperature, the medium is water and there is no high-strength hydraulic impact. Most cast steel gate valves can be used for 3 years and 5 years. The contract signed between the manufacturer and the customer states that the warranty period is one year, so it is necessary to eliminate the situation that the customer changes the working conditions at will.
Can cast steel gate valve be used under the working condition of about 300 degrees?

 

The abrasion resistance of the first-class valve is 2000 times, while that of the first-class valve is 4000 times. The service life of gate valves varies from country to country. It is stipulated to be 30 ~ 40 years in Japan, while it is stipulated to be 40 years in the United States and France.
working principle
Most gate valves are forced sealed, that is, when the valve is closed, the gate shall be forced to the valve seat by external force to ensure the tightness of the sealing surface. The gate of the gate valve moves in a straight line with the valve stem, which is also called rising stem gate valve. Generally, there are trapezoidal threads on the lifting rod. Through the nut at the top of the valve and the guide groove on the valve body, the rotary motion is changed into linear motion, that is, the operating torque is changed into operating thrust.
purpose
1. The gate valve is only used to fully open and close the medium on various pipelines or equipment, and is not allowed to be used for throttling.
2. For the gate valve with hand wheel or handle, the auxiliary lever shall not be added during operation (if the seal is not tight, the sealing surface or other parts shall be inspected and repaired). Turn the hand wheel and handle clockwise to close, otherwise it will open. The gate valve with transmission mechanism shall be used according to the provisions of the product operation manual.

1.How long do valves last shut?

You can expect a shut-off valve to last about 10 to 25 years, with an average of 20 years. But, if they are not “exercised” every year or two, there is good chance a valve will be freeze prematurely in the open position just when you really need it to close for a plumbing emergency or repair.
2.When should a gate valve be replaced?
These problems are typically caused by mineral buildup, so you should fully close and open your gate valves every few months to clear potential problems. If your gate valve has severe pitting or corrosion, you will need to replace it.
3.How do you fix a gate valve that doesn’t close?

he first step if a gate valve will not close completely

If the handle of the valve does not turn freely then loosen the packing nut just above the valve body and around the stem of the valve. Loosening it just one turn should be fine – just remember to tighten it back up when you are done.

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