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Zhejiang Dayang Valve Co., Ltd

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There are many business opportunities in the valve market. Chinese enterprises are still the role of migrant workers.

In recent years, the hot valve market has been flowing more and more valve products produced in China, but the right to speak in the valve market is not in the hands of Chinese companies, but in the hands of foreign brands. In the valve market, Chinese enterprises still have no right to speak. The price is decided by others, and the rules are also decided by others.

09

2024

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04

Gate valve installation and use

1. gate valve is a block valve, the sealing performance is not as good as the stop valve. The main "duty" of the gate valve is to "cut off the flow", as well as to a small resistance: "freewheeling". It should not be used to adjust the flow and pressure of the medium, such as long-term adjustment, the sealing surface is easy to be washed and worn by the medium, affecting the sealing performance. The temperature and pressure of the medium of the gate valve should be paid attention to the reliability of the use. At high temperature and high pressure, the gate may die due to temperature changes, and the non-sealing phenomenon is easy to occur due to uneven temperature of the medium. Wedge type but the gate valve is particularly obvious.

22

2024

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04

What is the difference between cast iron valves and cast steel valves

The main difference between cast iron and iron steel valves is that the carbon content is different, and the carbon content directly affects the strength and plasticity of steel. Carbon steel is also called carbon steel, iron-carbon alloy with carbon content less than 2% WC. In addition to carbon, carbon steel generally contains a small amount of silicon, manganese, sulfur and phosphorus. According to the purpose, carbon steel can be divided into three types: carbon structural steel, carbon tool steel and easy-cutting structural steel. Carbon structural steel is divided into building structural steel and machine manufacturing structural steel. According to the carbon content, carbon steel can be divided into low carbon steel (WC≤ 0.25%), medium carbon steel (WC0.25%-0.6%) and high carbon steel (WC 0.6%) According to the content of phosphorus and sulfur, carbon steel can be divided into ordinary carbon steel (high phosphorus and sulfur), carbon steel (low phosphorus and sulfur) and steel (low phosphorus and sulfur). Generally, the higher the carbon content in carbon steel, the higher the hardness, the higher the strength, but the lower the plasticity.

22

2024

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04

Working principle and characteristics of butterfly valve

The butterfly valve is based on the rotary valve to open and close the valve, driving the disc plate to rotate. In the cylindrical channel of the butterfly body, the disc rotates around the axis, mainly rotating the plate 90 degrees. When the flow control panel reaches 90 degrees, the valve is fully opened, and the medium flow can be adjusted by changing the angle of the valve. Usually installed in the diameter direction of the pipe. The butterfly valve and the stem itself have no locking function. In order to effectively control the flow, a worm gear reducer is required. The butterfly valve with worm gear reducer can not only automatically lock the butterfly valve, but also change the working performance of the butterfly valve and adjust the medium flow more accurately.

22

2024

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04

Introduction of Working Principle and Application of Vacuum Cast Steel Globe Valve

Vacuum cast steel globe valve is a commonly used fluid control device, widely used in various industrial fields. Its working principle is to control the on-off of the fluid through the lifting of the spool to achieve the purpose of controlling the flow of the medium. Vacuum cast steel globe valve has the advantages of simple structure, good sealing performance and long service life. It is widely used in petroleum, chemical, metallurgy, electric power and other industries.

22

2024

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04

Analysis on Quality Level and Future Development Trend of Valve Products at Home and Abroad

With all kinds of complete sets of equipment, process and performance improvement, foreign valve series varieties are still increasing, in recent years there have been many new varieties of valves.

09

2024

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04

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Address: 109 Zhangbao Industrial Street, Oubei Street, Yongjia County, Wenzhou City, Zhejiang Province
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