การเลือกวาล์วประตูที่เหมาะสมมีบทบาทสำคัญในประสิทธิภาพการผลิตและคุณภาพการทำงานของอุตสาหกรรมต่างๆ. ดังนั้น, it is necessary to make a reasonable choice according to actual needs when choosing a gate valve. Non-rising stem gate valve and rising stem gate valve are two common types of valves. They have some obvious differences in structure, operation and use. The characteristics and differences of these two valves will be introduced in detail below.
The structure of non-rising stem gate valve and rising stem gate valve
- Non-rising stem gate valve, also known as blind stem gate valve, has a structural feature that the valve stem is not exposed outside the valve, but hidden inside the valve. The valve stem controls the switch state of the valve by rotating. During the rotation process, the valve stem is not connected to the outside, so it is called “ลำต้นไม่ขึ้น”. This structure makes the non-rising stem gate valve simple in appearance and suitable for installation in places where space is limited or aesthetics are required.
- Rising stem gate valve, as the name implies, its valve stem is exposed outside the valve. The valve stem controls the switch state of the valve by moving up and down, and the movement trajectory of the valve stem can be clearly seen during operation. The structure of the rising stem gate valve is relatively simple, and maintenance and debugging are also relatively convenient.
Main differences of non-rising stem gate valve and rising stem gate valve
- Appearance difference The rising stem gate valve has a longer and more obvious stem, so it is more obvious in appearance and easy to identify. The torsion bar of the non-rising stem gate valve is hidden inside the valve cover, so the outline is relatively simple and the appearance will be more beautiful.
- Operation difference The operation of the non-rising stem gate valve is usually achieved by rotating the handle or actuator. Since the valve stem is hidden inside the valve, the valve stem needs to be driven by the rotation torque of the valve to achieve the opening and closing of the valve. This operation method requires the operator to have certain operating experience and skills to ensure the correct opening and closing of the valve.The operation of the rising stem gate valve is relatively simple and intuitive. By moving the valve stem up and down to control the opening and closing state of the valve, the operator can clearly see the movement of the valve stem, making it easier to judge the opening and closing state of the valve. นอกจากนี้, the rising stem gate valve is usually equipped with operating devices such as handwheels, gears or electric actuators, making the operation more convenient and quick.
- Difference in usage The rising stem gate valve has an extra bracket in its shape, so it looks much higher than the concealed stem gate valve. นอกจากนี้, the valve stem will rise when it is switched on and off. It is not suitable for use in places with narrow space. It is more suitable for pipeline projects on the ground. On the contrary, the concealed stem valve is smaller in size, and the valve stem will not move up and down when it is switched on and off. It is suitable for underground pipeline projects, such as underground pipelines, โรงบำบัดน้ำเสีย, ฯลฯ.
Usage scenarios
- The concealed stem gate valve has a compact structure and beautiful appearance. It is suitable for occasions with high space requirements, such as pipeline wells and underground pipelines. นอกจากนี้, the concealed stem gate valve also has good sealing performance and is suitable for application scenarios that require high sealing.
- The rising stem gate valve is more suitable for occasions that require quick operation and maintenance. Due to its simple and clear structure, the operator can quickly determine the switch status of the valve and perform corresponding operations. นอกจากนี้, the rising stem gate valve is also suitable for occasions that require frequent switching, such as water supply systems, drainage systems, ฯลฯ.
The above is a detailed introduction to the difference between the concealed stem gate valve and the rising stem gate valve. Different occasions require different valves. Choosing the right type of gate valve can help improve the efficiency of the valve and prevent problems during use. There are obvious differences between rising stem gate valves and concealed stem gate valves in terms of working principle and appearance, so when purchasing, you must fully understand them to avoid unnecessary impact.