What are the common faults and problems in the use of gate valves?
Faults that occur during the operation of the gate valve
Gate valves are in touch with various operational conditions. It can lead to specific faults. Let’s look at some of the most common gate valve faults:
Fault 1: Leakage at the Stem Packing
Leakage around the gate valve’s stem during operation indicates the stem packing is faulty. Stem packing handles provide a seal between the valve stem and the bonnet. Over time, the packing material may deteriorate or become damaged, resulting in leakage.
Fault 2: Stuck or Binding Gate
A gate valve may experience a fault where the gate becomes stuck or binds during operation. This can occur due to debris, corrosion, or improper alignment of the gate and seats.
Fault 3: Excessive Operating Torque
Excessive operating torque is another fault. It can occur during the operation of gate valves. It can make it difficult to open or close the valve with ease. This fault can go to various factors, such as:
Lack of lubrication
The buildup of debris or sediment
Misalignment of the stem and gate
Fault 4: Valve Seat Damage
Valve seat damage can occur due to continuous use or foreign particles in the fluid stream. Damaged valve seats can lead to leaks and affect the performance of the gate valve.
Fault 5: Excessive Valve Wear
Gate valves can wear out over time due to frequent use or sharp particles in the fluid. Excessive wear can lead to leakage, reduced performance, and increased operating torque.
