Pressure Seal Globe Valve
A pressure seal globe valve is a type of globe valve that utilizes a pressure-assisted sealing mechanism to maintain a tight seal between the valve’s moving parts, such as the stem and the seat. This design allows for higher pressure ratings and a tighter seal than traditional globe valves, which rely on gland packing to seal the valve. Pressure seal globe valves are commonly used in high-pressure and high-temperature applications, such as in power plants and other industrial settings.
The working of a pressure seal globe valve is based on the movement of a circular disc, known as the valve disc, which sits on top of a stem that is connected to the valve’s handle. The valve disc is positioned within the valve body, which contains a seat that the valve disc can encounter to stop or regulate the flow of fluid. When the valve is in the closed position, the valve disc is pressed against the seat by the pressure of the fluid on the upstream side of the valve. This creates a tight seal that prevents the fluid from flowing through the valve.
When the valve handle is turned to open the valve, the stem is raised, which raises the valve disc away from the seat. This creates an opening through which the fluid can flow. The size of the opening can be adjusted by turning the handle to a different position, which adjusts the position of the valve disc relative to the seat.
Advantages of Pressure seal globe valve:
- It is designed to handle high pressure and high temperature applications
- It ensures a tight seal, preventing leakage of fluid through the valve
- Easy to operate
- It ensures a long lifespan for the valve
Disadvantages of Pressure seal globe valve:
- It is more complex than traditional globe valves
- It may be more difficult to repair
- It has limited flow control
- It requires regular maintenance to ensure proper function
Applications of Pressure seal globe valve:
- Power generation
- Oil and gas
- Chemical processing
- HVAC systems
- Pulp and paper
Parts of Pressure seal globe valve: