
Globe Valve
Globe valves function by raising and lowering a convex disc-shaped plug via a rising stem into a circular seat within the globe-shaped body at the "equator." Fluid enters from one side into the "lower hemisphere," travels upward through the seat, and exits through an outlet on the opposite side of the "northern hemisphere." These valves are suitable for both on/off and throttling applications. Two-way globe valves are favored for precise flow control, while three-way globe valves are typically used for mixing media from two inlet ports and directing the mixture through a single outlet port.
Globe valves are widely used in various applications due to their excellent throttling capabilities and precise flow control. Here are some common uses of globe valves:
Applications
- Flow Regulation: Globe valves are ideal for applications requiring precise control of flow rates, making them suitable for regulating the flow of liquids, gases, and steam.
- Cooling Water Systems: Used in cooling water systems where flow needs to be regulated and controlled.
- Chemical Processing: In chemical plants, globe valves control the flow of various chemicals, ensuring safe and efficient operation.
- HVAC Systems: Used in heating, ventilation, and air conditioning systems to regulate the flow of heating or cooling fluids.
- Water Treatment: Applied in water treatment plants for controlling the flow of water and chemicals.
Globe valve has common three main body types which are angle design, Y-shaped design, and Z-shaped design. The Z-body globe valve design is the most simplest and common use in the water system application and is known as a straight-through globe valve. It has a Z-shaped diagram design or partition across the globular body and it contains a seat in the middle bottom body. The seat is horizontal and the disc and stem travel at right angles to the pipe axis. The stem passes through the bonnet.