Product overview
The opening and closing part is a cylindrical valve disc, the sealing surface is flat or conical, and the valve moves linearly along the center line of the fluid. The globe valve is only suitable for fully opening and fully closing, and is generally not used to adjust flow. Adjustment and throttling are allowed when customizing. Nominal pressure 1.0MPa-16.0MPa, working temperature -29~550℃, cutting off or connecting the pipeline medium on pipelines under various working conditions such as petroleum, chemical industry, pharmaceutical, fertilizer, power industry, etc. Driving modes include manual, gear transmission, electric, pneumatic, etc.
Strcture features
1. Simple structure, convenient to manufacture and maintain.
2. The working stroke is small and the opening and closing time is short.
3. Good sealing performance, small friction between sealing surfaces and long service life.
Product advantages
1. Honest businessman, reasonable price, quality assurance
2. Source manufacturer, sufficient supply, high cost performance
3. Support customization, multiple specifications, production and processing
4. Worry-free after-sales service, reliable quality
Principle of globe valve
Simply put, the principle of the globe valve is to use the valve stem torque to exert downward pressure on the sealing surface, and rely on the valve stem pressure to make the valve disc sealing surface and the valve seat sealing surface closely fit to prevent the inflow of the medium or to adjust the flow rate of the medium. The opening and closing part of the globe valve is a cylindrical valve disc, the sealing surface is flat or conical, and the valve disc moves linearly along the center line of the fluid. The movement modes of the valve stem include the lifting rod type (the valve stem rises and falls, the handwheel does not rise and fall), and the lifting and rotating rod type (the handwheel and the valve stem rotate and rise together, and the nut is set on the valve body). The globe valve is a forced sealing valve, so when the valve is closed, pressure must be applied to the valve disc to force the sealing surface not to leak.
Structural principle
The centers of the inlet and outlet of the globe valve are located on the same straight line, and the fluid flows like an S-shaped sphere, so it is also called a spherical globe valve.
When the valve stem's seat moves downward toward the bottom sealing surface and presses it, the medium stops flowing; when the valve stem rises, the medium passes through the flow channel from below to the upper flow channel.
There are generally directional requirements when installing globe valves. The flow direction of the medium in the pipeline generally flows from bottom to top through the valve seat port, which is what we often call "low in, high". The purpose of this is to reduce fluid resistance and save effort when opening. And in the closed state, the valve stem and packing culvert are not in contact with the medium, ensuring that the valve stem and packing culvert are not damaged or leaked.
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