Globe valve, also known as cut-off valve, belongs to the forced sealing type valve, so when the valve is closed, pressure must be applied to the valve flap to force the sealing surface not to leak. It is one of the most widely used valves, it is popular because of the opening and closing process between the sealing surface of the friction is small, more durable, open height is not large, easy to manufacture, easy maintenance, not only for low pressure, but also for high pressure.

The working principle of globe valve is to rely on the movement of the valve flap on the valve seat to control the flow of fluid. Valve flap along the centre line of the valve seat for linear movement, change the distance between the valve flap and the valve seat, thereby changing the cross-sectional area of the flow path, to achieve the control of the flow and cut-off. Shut-off valve is suitable for a variety of occasions, including control of air, water, steam, various corrosive media, slurry, oil, liquid metals and radioactive media.

The closing principle of the globe valve is to rely on the pressure of the valve bar, so that the sealing surface of the valve flap and the valve seat sealing surface of the valve close to prevent the flow of media. China's valve "three to" has stipulated that the flow direction of the globe valve, always use the top-down, so there is a directional installation. Globe valve structure The length is greater than the gate valve, while the fluid resistance is large, long-term operation, sealing reliability is not strong.

Advantages

1、Globe valve structure is simple, manufacturing and maintenance is relatively convenient.

2, globe valve working stroke is small, short opening and closing time.

3, globe valve sealing is good, the friction between the sealing surface is small, long life.

Disadvantages

1、Globe valve fluid resistance, open and close when the force required is larger.

2, the globe valve is not suitable for particles, viscosity, easy to coking medium.

3, globe valve regulation performance is poor.