Issues regarding the selection of valves for circulating water pumps
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Our circulating pool is an above-ground pool; therefore, it is very difficult to replace valves whether it is for increasing or decreasing the head pressure. The pump has to be stopped first, and when replacing valves for reducing the head pressure, the water in the pool must also be drained, which has a significant impact on production. The valves we chose were gate valves, but whether it’s due to quality issues or the quality of the water, the actuation rods and cores often fall off. I would like to ask if there are any good ways to improve this?
Firstly, the design of the water tank in your facility is what causes this process defect. Your company may have chosen a cast iron gate valve of low quality. The common reasons for the valve core and valve stem to come loose may include the following: first, inadequate maintenance – no dust removal, excessive dust accumulation, rust formation, as well as a lack of rust removal and lubrication. Second, there are often cases of over-opening and over-closing. Third, if it gets damaged frequently, consider replacing it with a cast steel gate valve. Fourth, it is possible to consider adding double valves to each line. A double gate valve or a cut-off valve for either one of them.
This post was last edited by neosir on 2010-11-23 08:58. We experience this phenomenon quite often here as well: the recirculation water valves remain underground all year round, and by the time they are needed, they are almost always corroded due to being submerged in water; they become damaged as soon as they are used for the first time. Now we try to move all such valves to the surface. The hair shafts and hair cores often fall out; I think it’s because of being soaked in water.
That’s a great question; congratulations! I personally hold the following views, which I share with all my friends as a source of encouragement! 1. The design of the circulating water pool may already take into account various environmental factors, and these cannot be changed; therefore, measures and solutions must be sought through daily operation and maintenance. 2. The check valve at the outlet of the circulating water pump should be reliable, as this helps to reduce the impact on the valve when the system is shut down. 3. The valve should not be closed or opened completely; leave a half-turn of clearance to reduce the shear force on the connection between the valve stem and the valve core. 4. If possible, replace the screws used to fix the valve stem to the valve core with stainless steel to reduce corrosion.