I believe everyone has heard of small parts such as bolts, valves, and ball valves, and what I want to introduce to you today is stainless steel ball valves. Stainless steel ball valve classification: stainless steel pneumatic ball valve, stainless steel electric ball valve, stainless steel manual ball valve. Stainless steel ball valve materials are divided into 304,316,321 stainless steel ball valves. So, are stainless steel ball valves expensive? Different brands of stainless steel ball valves have different prices. Let me introduce the price and related knowledge of stainless steel ball valves in detail.
Working principle of stainless steel ball valve
The working principle of the ball valve is to make the valve smooth or blocked by rotating the spool. The ball valve switch is light and small, can be made into a large diameter, reliable sealing, simple structure, easy maintenance, the sealing surface and the spherical surface are often in a closed state, not easy to be eroded by the medium, and is widely used in various industries.
The ball valve and the plug valve are the same type of valve, only its closing part is a ball, and the ball rotates around the center line of the valve body to achieve opening and closing.
The ball valve is mainly used in the pipeline to cut off, distribute and change the flow direction of the medium. Ball valve is a new type of valve widely used.
Stainless steel ball valve advantages
1. The fluid resistance is small, and its resistance coefficient is equal to that of the pipe section of the same length.
2. Simple structure, small size and light weight.
3. Tight and reliable, the sealing surface material of the ball valve is widely used plastic, good sealing, and has also been widely used in the vacuum system.
4. Convenient operation, quick opening and closing, only 90 ° rotation from fully open to fully closed, which is convenient for remote control.
5. Easy maintenance, simple structure of ball valve, seal ring is generally movable, disassembly and replacement are more convenient.
6. When fully open or fully closed, the sealing surfaces of the ball and the valve seat are isolated from the medium. When the medium passes through, it will not cause corrosion of the valve sealing surface.
7. Wide range of application, from small diameter to a few millimeters to a few meters, from high vacuum to high pressure can be applied.
Stainless steel ball valve price
The specifications of stainless steel ball valves are large and small. Small-size stainless steel ball valves are small parts, and the price is relatively low, usually between a few yuan to tens of yuan. Therefore, in addition to the influence of its brand and model, the specific price of stainless steel ball valves will also affect the price of stainless steel ball valves.
Note: This price is for reference only! Due to different regions, of course, the price will vary. If you want to know more about the relevant price details, please refer to the local dealers!
Stainless steel ball valve maintenance
Stainless steel ball valves are very easy to contact with other metal iron products during the manufacturing process. In order to keep stainless steel valves from rusting, the simplest method is to follow the procedure below.
First: After the blank is finished, after acid pickling, it must be rinsed clean. If there are sand holes or perforations, it should be welded by argon arc welding. Then polish again, and then solid solution treatment;
Second: the finished product, after the processing pressure test is completed. It should be washed with water added with anti-rust powder.
Third: During the transportation process, try to use wooden boxes for packaging, and do not touch metal products.
Fourth: After installing the pipeline, regularly maintain and maintain it, for example, lubricating oil is often applied to the stem. Open and close the valve appropriately a few times. Make the assembling of the inner ball, valve stem and sealing surface difficult.
Stainless steel ball valves generally have two structures: reduced diameter and non-reduced diameter channels. Regardless of the structure, the flow resistance coefficient of the ball valve is relatively small.
In particular, the so-called full flow type, that is, a non-reducing ball valve, because its channel diameter is equal to the inner diameter of the pipe, the local resistance loss is only the friction resistance of the pipe of the same length, that is, the flow resistance of this ball valve is the smallest among all valves. In the rocket launch and its test system, the smaller the resistance of the pipeline is, the better.
There are two ways to reduce the resistance of the pipeline system: one is to reduce the flow rate of the fluid. For this reason, it is necessary to increase the diameter of the pipe and the diameter of the valve. This often has an adverse effect on the economy of the pipeline system, especially for low-temperature delivery systems ( Liquid hydrogen) is extremely unfavorable.
(1) Reduce the local resistance of the valve, therefore, the ball valve naturally becomes the best choice.
(2) The on-off switch of the ball valve is quick and convenient.
Under normal circumstances, the ball valve only needs to turn the handle 90 ° to complete the fully open or fully closed action, it is easy to achieve rapid opening and closing. It can realize fast opening and closing, and the opening and closing time of some structures is only 0.05 ～ 0.1s to ensure that it can be used in the automatic system of the test bench. When opening and closing the valve quickly, there is no impact during operation.
(3) The sealing performance of the ball valve is good.
The seats of most ball valves are made of elastic materials such as PTFE, and the metal and non-metallic sealing pairs are usually called soft seals. Generally speaking, the tightness of the soft seal is easy to ensure, and the processing accuracy and surface roughness of the sealing surface are not very high.
(4) Long service life of ball valve.
Because PTFE has good self-lubricating properties, the friction and wear with the ball are small, and due to the improvement of the ball processing technology, the roughness is reduced, thereby improving the service life of the ball valve.
Comparison of copper ball valve and stainless steel ball valve
1. The materials they choose are completely different, the copper used for the copper ball valve, and the stainless steel used for the stainless steel ball valve.
2. The copper ball valve has excellent corrosion resistance, the switch operation is smooth and labor-saving, and it is durable and leak-proof. Stainless steel does not suffer from corrosion, pitting, rust and wear, and high temperature resistance. Stainless steel is usually expensive.
3. In the case of the same pressure, the price is cheap stainless steel, and the medium temperature of the copper ball valve is much higher than that of the stainless steel ball valve. If the medium temperature is too high, it is necessary to use the copper ball valve. If the medium temperature does not exceed 80 degrees, it can be used. Stainless steel ball valve.
Editor's summary: Stainless steel ball valves are divided into fixed ball valves, floating ball valves and elastic ball valves. The advantages and disadvantages of different ball valves and the use environment are different. It is recommended that you pay more attention when buying, and choose according to your actual situation. Suitable products.
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Shijiazhuang Helper Soaring Stainless Steel Products Co., Ltd. is one of the subsidiaries of Helper Group. It is a professional manufacturer of all types of precision casting and machining components for pump, valve, hydraulic system, agricultural machinery, automobile industry and various OEM parts. The main materials are carbon steel, stainless steel and other alloy steel etc. Advanced process technology (Silicon sol process) and investment casting producing line and professional technical team are the advantages that will help clients to save cost and create value.
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