There are two way to lift a manhole cover:
A gate valve is a type of valve that opens or closes by lifting a gate out of the path of the fluid. Unlike other valves like ball valves or globe valves, gate valves are designed primarily to be fully open or fully closed. This means they are not suitable for throttling flow; instead, their primary purpose is to provide a reliable shut-off mechanism. In shower systems, gate valves are used to control water flow from the main supply line to the shower fixture, offering a simple and effective means of isolating the system for maintenance or repairs.
The environmental impact of traffic bollards should not be overlooked. By promoting walking and cycling through the creation of pedestrian-friendly zones, bollards can contribute to reduced vehicle emissions. Additionally, the use of sustainable materials in bollard construction helps cities move toward greener infrastructure practices.