LYV® Din Globe Valve Introduction
You are welcomed to come to our factory to buy the latest selling, low price, and high-quality German standard stop valve We look forward to cooperating with you. DIN globe valve is a forced seal valve, so when the valve is closed, must apply pressure to the disc, in order to force the sealing surface does not leak. When the medium enters the valve from below the disc, the resistance that the operating force needs to overcome is the friction force of the stem and packing and the thrust generated by the pressure of the medium. The force of closing the valve is larger than that of opening the valve, so the diameter of the valve stem should be larger, otherwise the failure of the stem top bending will occur. In recent years, after the emergence of self-sealing valves, the medium flow of the globe valve changes from the top of the disc into the valve chamber. At this time, under the action of medium pressure, the force of closing the valve is small, while the force of opening the valve is large, and the diameter of the valve stem can be reduced accordingly. At the same time, under the action of medium, this form of valve. The flow direction of the stop valve is from top to bottom. When the valve is opened, the opening height of the valve disc is 25% ~ 30% of the nominal diameter, the flow has reached, indicating that the valve has reached the fully open position. Therefore, the fully open position of the globe valve should be determined by the stroke of the valve disc.
Din Globe Valve principle:
The Din Globe Valve, also known as the closure door, is the most widely used valve. It is popular because of the small friction between the sealing surface in the process of opening and closing, relatively durable, small opening height, easy manufacturing and convenient maintenance. It is not only suitable for medium and low pressure, but also suitable for high pressure.
The closing principle of the globe valve is to rely on the pressure of the valve rod, so that the sealing surface of the valve disc and the sealing surface of the valve seat are closely fitted to prevent the circulation of the medium.
The globe valve only allows the medium to flow in one direction when installed. The structural length of the globe valve is greater than that of the gate valve, and the fluid resistance is large
LYV® German standard stop valve Parameter (Specification)
Manufacturing standard: DIN EN13709-2003
Structure length: DIN EN1092-1:2002
Flange standard: DN EN 588-1:1995
Test standard: DIN EN12266:2003
LYV® German standard stop valve Feature And Application
Advantages and disadvantages of German standard globe valve
1. Simple structure, convenient manufacturing and maintenance.
2. Small working trip and short opening and closing time.
3, good sealing, small friction between the sealing surface, long life.
German standard stop valve precautions
2. It is not suitable for medium with particles, high viscosity and easy coking.
3. Poor adjustment performance.
4, the fluid resistance is large, long-term operation, sealing reliability
The type of globe valve according to the position of valve stem thread is divided into external thread type and internal thread type. According to the flow direction of the medium, there are straight through, straight flow and Angle. The stop valve is divided into packing seal stop valve and bellows seal stop valve according to seal form.
LYV® German standard stop valve Details