Which valve has the greatest tendency to wear out or break over time?

Which valve has the greatest tendency to wear out or break over time?

• A. Globe valve
• B. Angle valve
• C. Gate valve
• D. Ball valve

Answer: (C)

Wear tends to come from moving parts rubbing against each other, especially when abrasive material in water accelerates that wear. The gate valve uses a sliding gate that moves into and against the seats to stop or start flow, so every operation involves metal-to-metal contact along the seating surfaces, plus the stem packing that seals around the stem. In irrigation systems, water often carries sand and grit, which acts like sandpaper on the gate and seats, accelerating wear and leading to leaks or sticking over time. Ball valves reduce wear because the ball rotates with minimal sliding contact during operation. Globe valves do experience wear where the disk rubs against the seats, particularly when throttling, but the combination of repeated sliding contact and abrasive wear makes the gate valve more prone to wear out or fail in typical service. That’s why it’s considered the most likely to wear out or break over time.

Wear tends to come from moving parts rubbing against each other, especially when abrasive material in water accelerates that wear. The gate valve uses a sliding gate that moves into and against the seats to stop or start flow, so every operation involves metal-to-metal contact along the seating surfaces, plus the stem packing that seals around the stem. In irrigation systems, water often carries sand and grit, which acts like sandpaper on the gate and seats, accelerating wear and leading to leaks or sticking over time. Ball valves reduce wear because the ball rotates with minimal sliding contact during operation. Globe valves do experience wear where the disk rubs against the seats, particularly when throttling, but the combination of repeated sliding contact and abrasive wear makes the gate valve more prone to wear out or fail in typical service. That’s why it’s considered the most likely to wear out or break over time.