Thead Gate Valve

Описание

Data Sheet

– 1/2″~2″ (DN15~DN50)
– W.P.:200WOG (PN16)
– W.T.:425°C
– Investment casting
– Non-Rising stem
– Thread end: ASME B1.20.1 (NPT)，
DIN 259 / DIN 2999, BS 21, ISO 288-1, ISO 7-1
– Socket weld end: ASME B16.11

Here are some details about gate valves:

Structure: Gate valves are typically composed of a valve body, valve bonnet, valve disc (gate), and valve stem. The valve body and bonnet are connected by bolts or threads. The valve stem is connected to the valve disc through the bonnet, and the flow of fluid is controlled by the upward and downward movement of the valve disc.

Valve disc type: The valve disc of a gate valve is usually rectangular or wedge-shaped, known as a gate. The gate opens or closes the valve by the up and down movement of the valve stem, perpendicular to the flow direction.

Flow characteristics: Gate valves have a linear flow characteristic, which means that when the valve is fully open, the fluid can flow through the valve with little resistance. When the valve is closed, the flow passage is completely blocked.

Operation methods: Gate valves can be operated manually or remotely controlled using electric, pneumatic, or other automated devices. Manual operation is typically achieved by rotating the valve stem to raise or lower the valve disc.

Sealing performance: Gate valves generally have good sealing performance, especially when fully closed. The valve disc and valve seat form a tight metal-to-metal fit, reducing the possibility of leakage.

Material selection: The choice of materials for gate valves depends on the nature of the medium and the requirements of the working environment. Common materials include cast iron, carbon steel, stainless steel, etc., and the appropriate material can be selected based on specific applications.

Gate valves, as a common type of valve, have several advantages in certain aspects, including:

Low flow resistance: Gate valves are designed with low flow resistance. When the valve disc is fully open, there is minimal obstruction in the passage, allowing fluid to flow through the valve with low resistance. This is beneficial for applications that require smooth fluid flow.

Quick opening and closing: The valve disc of gate valves can move vertically quickly, enabling fast opening and closing operations. This quick response characteristic makes gate valves highly useful in scenarios where there is a need to rapidly shut off fluid flow, such as in emergencies or applications requiring swift flow control.

Excellent sealing performance: Gate valves typically exhibit good sealing performance, especially when fully closed. The metal-to-metal fit between the valve disc and valve seat provides reliable sealing, reducing the likelihood of leakage.

Reliability: Gate valves have a relatively simple structure with a small number of components, which contributes to their reliability and stability. Fewer moving parts and less susceptible components result in longer service life for gate valves when properly maintained and operated.

Multiple material options: Gate valves offer a wide range of material choices, including cast iron, carbon steel, stainless steel, etc. Depending on specific application requirements, appropriate materials can be selected to meet the demands of the medium’s properties, temperature, and pressure requirements.