A gas tap, also known as a gas valve, is a crucial device commonly found in laboratories. Let’s explore its functions:

1. Flow Control: A gas tap regulates the flow of gas through a pipe from its supply source. Similar to a water tap, it has a valve that stops the free flow of gas until the tap is turned and the valve opened.

2. Laboratory Applications: Gas taps play a central role in laboratories, from basic educational settings to commercial, industrial, or research labs. They are usually located on workbenches for easy access by students, scientists, or lab technicians.

3. Gas Types: Gas taps are used to control the flow of various gases, including natural gas and LPG (liquefied petroleum gas). They are available to suit most pressure gases within laboratory environments.

4. Safety and Visibility: In school laboratories, gas tap controls are typically bright yellow. This color ensures easy visibility and unmistakable identification for safety reasons. Teachers can quickly scan the room to check if any taps have been left on.

5. Color Coding: In commercial and scientific labs, handwheels on gas taps may be color-coded according to standards (such as DIN EN 13792) for easy reference.

6. Variety: Gas taps come in different orientations (bench-mounted, wall-mounted, or drop-down) and combinations (single, 2-way, or 4-way taps).