Let’s discuss how to create a spare parts plan for valves
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This post was last edited by MyHeartTowardsTheSea on August 10, 2009, at 09:09. Pneumatic shut-off ball valves and control valves are generally produced in large quantities in factories, with many different models and specifications. Let’s share our experiences in formulating spare parts plans for pneumatic ball valves and control valves. What components should be stocked primarily? How can we strike a balance between meeting maintenance needs and controlling inventory levels?
In the past, the company operated in this way: one unit of a particular model could be kept on hand, and additional units were purchased after it was used. Valves mainly consist of a valve seat and seals, which are prone to damage and need to be replaced.
It is quite difficult for the instrumentation field to manage spare parts. This is why the instrumentation field evolves quite rapidly. Some spare parts were discarded before being used. Compared to control valves, in my opinion: 1. For the valves in critical control circuits that are subject to severe corrosion and erosion, 1:1 spares must be provided. 2. For general spare parts, a ratio of 10:1 is sufficient (the specific ratio should be determined based on the characteristics of the equipment, the rate of damage during normal operation, and the frequency of replacements). Such as: positioners, actuators, locking valves, filter pressure regulators, diaphragms, solenoid valves, and so on.
It is usually 10:1; if there is plenty of silver, it can be 5:1. Special valves must have a ratio of 1:1, otherwise it will affect the operation of the device, and the losses would be significant.
I basically agree with what was said on the third floor. However, few valves are available as spare parts. For control components such as positioners, the ratio is usually around 10:1. But imported positioners like those from FISHER can cost tens of thousands of yuan each; one spare unit of a particular model is sufficient. If there’s plenty of money available, then it’s another matter – it depends on the management’s decision
For vulnerable components such as diaphragms, seals, and gaskets, manufacturers provide repair kits.