The valve is a kind of pipeline accessories. It is a device used to change the direction of the passage section and the direction of medium flow to control the movement of the medium. It has diversion, cut-off, regulation, throttling, non-return, diverting or overflow pressure relief, etc. Features. The next small series for everyone to introduce the types of valves and valves how to buy.
The kind of valve
1. Globe valve
It is mainly used to switch on or cut off the medium in the pipeline. It is generally used for medium and small diameter pipes. The applicable pressure and temperature range is very large.
2, check valve
Check valves are valves that automatically stop the flow of fluid back, also known as check valves. The fluid flows from the inlet side to the outlet side. When the pressure on the inlet side is lower than the outlet side, the valve flap automatically closes under the influence of the fluid pressure difference, its own gravity and other factors to prevent the backflow of the fluid. Check valves are usually used for pump outlets.
3, safety valve
The principle of action is based on the balance. Once the pressure on the valve is greater than the set pressure of the spring valve flap, the valve flap will be pushed open by this pressure and the gas (liquid) body of the pressure vessel will be pushed out to reduce the pressure inside the pressure vessel. pressure.
4, gate valve
The gate valve is one of the commonly used shut-off valves and is mainly used to switch on or cut off the medium in the pipeline and is not suitable for regulating the flow of the medium. The gate valve is suitable for a wide range of pressures, temperatures and bore diameters, and is particularly suitable for medium and large diameter pipes.
From the structural form, the main difference is the form of the sealing element used. According to the form of the sealing element, the gate valve can be divided into a variety of different types, among which are commonly used: parallel gate valves, parallel wedge gate valves.
5, ball valve
The ball valve uses a ball with a circular through hole as the opening and closing part, and the ball rotates with the valve stem to realize a valve for opening and closing movement.
How to choose a valve
1, to clarify the use of the valve in the device or device, determine the conditions under which the valve can work, what is the applicable medium, the working pressure and temperature, etc.;
2. Understand the nominal diameter and connection method of the connecting pipe with the valve: flange, thread, welding, etc.;
3, determine the way to operate the valve: manual, electric, electromagnetic, pneumatic or hydraulic, electro-hydraulic linkage;
4, according to the pipeline conveying medium, working pressure, working temperature to determine the selected valve housing and internal parts of the material: cast steel, carbon steel, stainless steel, alloy steel, stainless steel, acid alloy, copper alloy;
5, select the type of valve, determine the type of valve, parameters and geometric parameters of the selected valve, such as: structure length, flange connection form and size, the size of the valve height direction after opening and closing, the size and number of bolt holes connected , Overall valve size, etc.
6, in the choice of Baotou valve, sometimes not only according to the above several options, but also to follow the basis of the choice of valve:
7. The use of the selected valve, operating conditions and control methods should be clearly defined. The valve specifications and categories should comply with the requirements of the pipeline design document. The working pressure should be greater than or equal to the working pressure of the pipeline.
8. Understand the nature of the working medium: work pressure, working temperature, corrosion performance, whether it contains solid particles, whether the medium is toxic, whether it is flammable, explosive medium, viscosity of the medium.
9. Understand the requirements for valve fluid properties: flow resistance, discharge capacity, flow characteristics, seal rating, etc.
10, clear installation dimensions and dimensions requirements: nominal diameter, and pipe connection and connection dimensions, dimensions or weight restrictions.
11. Additional requirements for the valve's product reliability, service life, and explosion-proof performance of electrical devices.
Editor's summary: The types of valves and how to purchase the valves are introduced here. We hope to help everyone. If you want to know more related information, you can pay attention to this website information.
Doors to buy decoration accessories to buy household goods to buy green plants to buy building materials to buy
Refinement of Copper removing agent and Decoppering Agent through Lead Fire Process
Copper removing agent, lead copper removing agent, lead fire smelting copper removing agent, lead refining copper removing agent, lead copper removing agent for export, crude lead fire smelting copper removing agent, No. 2 lead refining copper removing agent
Bismuth is the impurity which is the most difficult to remove during fire refining of crude lead. lead fire process refined debismuthizing agent is prepared and produced by Luanchuan Hengkai Metallurgical Materials Sales Co., Ltd after research and development for many years. The lead fire smelting novel copper removing agent is prepared and produced by our company. After the copper removing agent produced by our company is used, the copper content in the lead after copper removal is within 0.0002. More importantly, after the copper removing agent produced by our company is used, no pollution is produced (no smoke), the emission of sulfur dioxide is reduced, there is no low-altitude pollution, the operation is simple for workers, the operating environment is improved, and free technical guidance is given for the first-time use.
"Hengkai Metallurgical" brand patent products (patent number: 201808178848) is environmental protection copper removing agent 1#. Environmental protection formula copper removing agent 2# belongs to upgrade products of the copper removing agent 1#. After the copper removing agent produced by our company is used, the copper content in the lead is less than 0.00015 after copper removal. The product is characterized by small usage, no pungent smell, no low-altitude pollution, easier operation and low slag rate. Product advantages: the content of existing copper removing agent in the market is 6%-10%, which is lower than ours. Currently, the company is the only one in China that has passed EIA acceptance. The company adopts the most advanced independently-developed automatic production line to produce copper removing agent. The annual output is 15,000 tons, and the moisture content is less than 0.01%.
Luanchuan Hengkai Metallurgical Materials Sales Co., Ltd. is a domestic professional R & D and production manufacturer engaged in lead smelting copper removing agent and lead-refined debismuthizing agent. The company cooperates with a number of scientific research institutions, and it has abundant strength in independent research and development, design automation assembly line operation, production and examination, which has formed the production capacity of 30,000 tons in copper removing agent, debismuthizing agent, iron sulphide, Ferro sulphur, alloy sand, ferrous sulphide, Pyrite and other series products. It is one of the domestic production enterprises with the largest scale. The company passed the ISO9001 international quality system certification in April 2018. The patented products (patent No.: 201808178848) "Hengkai Metallurgical" brand copper removing agent and ferro sulphur gain consistent praise from clients after innovation, research and development and improvement by the clients for many years due to high product quality and cheap price. It supplies goods to most domestic lead smelting enterprises throughout the year with stable business relationship. Its market share is 70%. Its products are exported to more than 10 countries and regions. Its share in the southeast Asia market is 80%. The company belongs to a reliable partner and service provider.
Hengkai metallurgical company sincerely welcome customers at home and abroad to visit the guidance, negotiate cooperation!
(In addition, our company is specialized in the production of `Hengkai Metallurgical" Brand - ferro sulphur series for foundry, copper removal agent series for lead smelting, debismuthizing agent for lead smelting, iron sulphide series for resin grinding wheel abrasive industry, iron sulphide series for brake pad friction industry, iron sulphide series for heavy metal wastewater treatment, iron disulphide series for soil improvement, iron disulphide for lithium battery anode, alloy sand series for wear-resisting flooring industry, ferrous sulphide powder series for ferrous sulphide cored wire, ferrous sulphide for ferrous sulphide cored wire, iron sulphide for resin grinding wheel, ferrous sulphide powder for heavy metal wastewater treatment, ferrous sulphide powder for soil improvement, ferrous sulphide cored wire, pyrite, ferrous sulphide ore, molybdenum oxide, high purity molybdenum trioxide, ammonium molybdate, titanium dioxide, cryolite powder, mullite, etc.)Decoppering Agent
Decoppering Agent, Pyrite, Cooper Removing, Copper Remover
LUANCHUAN COUNTY HENGKAI METALLURGICAL MATERIALS SALES CO.,LTD , https://www.pyritechina.com