Gate valve is one of the most widely used types of valves in industrial piping systems. Due to its simple structure, low flow resistance and reliable sealing, it is suitable for fully open or fully enclosed working conditions, especially in high-pressure and large-diameter pipelines. Below is an analysis of the main applications and characteristics of gate valves in the industrial field:
I. Main characteristics of gate valves
● Extremely Low Flow Resistance: The valve body has a direct flow channel, and the medium flows almost unhindered when fully opened, which is suitable for high-flow transportation (such as oil and gas pipelines).
● Bi-directional seal: The gate valve and valve seat are symmetrical in design and can withstand pressure in both directions (both inlet and outlet sides can be sealed).
● Wide Applicable Pressure Range: It can cover both low pressure (PN10) and ultra-high pressure (Class 2500/PN420).
● Not suitable for flow control: The gate valve is subject to vibration and wear when it is partially opened, and is only recommended for fully open or fully enclosed working conditions.
II. Key factors for choosing a gate valve
1. Characteristics of the environment
● Corrosive: Choose stainless steel, fluorine, or alloy materials.
● Particle Content: Use a knife gate valve or a wear-resistant coated gate valve.
2. Temperature and Pressure
● High temperature (> 400°C): Choose the gate valve body made of chromium-molybdenum steel (WC6).
● Ultra-high pressure: Forged gate valve body self-tightening seal design.
3. Working mode: manual (small diameter), reducer (DN300 and above), electrical/pneumatic (automatic system).
4. Installation environment: underground pipeline: choose fully welded or anti-corrosion coated gate valve body.
Zhejiang Gaodun Valve Co., Ltd. is a modern, technological, large-scale professional valve manufacturing enterprise integrating R&D, production and manufacturing, providing complete solutions for the industrial ecological chain, as well as sales and technical service support in domestic and foreign markets.
