4. Quiet Operation Unlike ball valves which can produce noise when opened or closed, gate valves operate quietly. This feature makes them suitable for residential areas where noise may be a concern.
Manhole covers may also be made from glass-reinforced plastic or other composite material (especially in Europe, or where cover theft is of concern). Because of law restricting acceptable manual handling weights, Europe has seen a move towards lighter weight composite manhole cover materials, which also have the benefits of greater slip resistance and electrical insulating properties.
3. Ease of Operation Gate valves typically require only a quarter turn of the handle to operate, making them easy to use. This simplicity is beneficial in emergency situations where quick action may be needed.