What is the difference between the piston valve and the plug valve

Here are some well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. Although the ranking may change due to time and market conditions, the following brands are generally considered to be among the top brands in the valve industry: Water System Valves and Industrial ValvesThe following more influential first-line brands can be used as a reference, but are for reference only:

Shanghai Qizhong Valve, Chaoda, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. Copper valves or crown valves are better, and you can contact 15168695777 to buy them

Carbon steel. astm a216

Non-corrosive applications, including water, oil and gas, temperature range: -30oC to +425oC Low temperature carbon steel.

astm a352

Low temperature applications as low as -46oC

It cannot be used at temperatures higher than +340oC on nickel steel.

astm a352

Low temperature applications as low as -101oC

It cannot be used at temperatures higher than +340oC for Chromium-Molybdenum steel.

astm a217

Non-corrosive applications, including water, oil and gas, temperature range: -30oC to +593oC chromium.

astm a217

Non-corrosive applications, including water, oil grade WC9 and gas, temperature range: -30oC to +593oC 5% Chromium-Molybdenum.

astm a217

Mildly corrosive or aggressive and non-corrosive applications with a temperature range of -30oC to +649oC 9% chromium 1% molybdenum.

astm a217

Mildly corrosive or aggressive and non-corrosive applications, temperature range: -30oC to +649oC 12% chrome steel.

astm a487

Corrosive applications, temperature range: -30oC to +482oC 12% chromium.

astm a217

Corrosive applications with a temperature range of up to +704 16 stainless steel.

astm a351

Corrosive or ultra-low temperature or high temperature non-corrosive applications, temperature range: -268oC to +649, temperature above +425oC to specify carbon content and above 347 stainless steel.

astm a351

Mainly used for high temperature, corrosive applications, temperature range: -268oC to +649oC, temperature above +540oC to specify carbon content and above 304 stainless steel.

astm a351

Corrosive or ultra-low temperature or high temperature non-corrosive applications, temperature range: -268oC to +649oC, temperature above +425oC to specify carbon content and above 304L stainless steel.

astm a351

Corrosive or non-corrosive applications with a temperature range of up to +425OC 316L stainless steel.

astm a351

Corrosive or non-corrosive applications with a temperature range of up to +454oC alloy steels.

astm a351

It has very good resistance to hot sulfuric acid corrosion, and the temperature is up to +425oC Monel.

astm a494

Solderable grade. It has very good resistance to all common organic acids and salt water.

corrosive properties. It also has a high resistance to corrosion by most alkaline solutions.

properties up to +400OC Haast Nickel Alloy B

astm a494

It is especially suitable for processors of hydrofluoric acid in various concentrations and temperatures.

It has very good resistance to sulfuric acid and phosphoric acid corrosion, temperature.

Up to +649oc

The opening and closing part of the plug valve is a cylinder with holes, which rotates around the axis perpendicular to the channel, so as to achieve the purpose of opening and closing the channel. Plug valves are mainly used to open and close pipes and equipment media. The main advantages of the plug valve are as follows:

1) It is suitable for frequent operation, fast and light opening and closing. 2) Low fluid resistance. 3) Simple structure, relatively small size, light weight, easy to maintain.

4) Good sealing performance 5) It is not limited by the installation direction, and the flow direction of the medium can be arbitrary. 6) No vibration, low noise. According to the structural form, the plug valve can be divided into four types: tight-locked, self-sealing, packing and oil-filling.

According to the channel form, it can be divided into three types: straight-through, three-way and four-way.

The plunger valve is composed of the valve body, bonnet, valve stem, plunger, hole frame, sealing ring, handwheel and other parts. When the handwheel rotates, the plunger is driven by the valve stem to reciprocate up and down in the middle of the hole frame to complete the opening and closing function of the valve. In the valve, interference fit is used between the plunger and the sealing ring, and the lateral force generated by the compression of the sealing ring is sealed with the hole surface of the valve body and the outer circle of the plunger by adjusting the flange bolt in the gland, so as to ensure the tightness of the valve, eliminate the internal and external leakage, and at the same time the valve opening torque is small, and the valve can be opened and closed quickly.

The surface of the piston valve is machined by a high-precision cylindrical grinding machine. The sealing ring is made of non-toxic new sealing material with strong elasticity and high wear resistance, so the sealing is reliable and durable. This increases the service life of the piston valve.

To sum it up: the piston valve spool moves up and down. The seal is based on the contact surface between the valve core and the valve seat, which is basically a face seal. The plug spool is rotating. The seal is a 360 degree seal. Good sealing performance. The operating torque of the valve is large.

Hello, plunger valves and pinch valves are both common types of valves, and there are some significant differences between them. First of all, a piston valve is a valve consisting of a plunger, a seat, and a bonnet, and it works by moving the plunger inside the seat, thus controlling the flow of fluid. The pipe pinch valve is a valve composed of a pipe clamp, a valve seat and a bonnet, and its working principle is that the pipe clamp moves in the valve seat, so as to control the flow of the Zen sail fluid.

Secondly, the structure of the plunger valve is relatively simple, its structure is composed of three parts: plunger, valve seat and bonnet, its structure is simple, and the installation and maintenance are relatively easy. The structure of the pipe clamp valve is more complex, its structure is composed of three parts: pipe clamp, valve seat and bonnet, its structure is more complex, and the installation and maintenance are also more complicated.

In addition, the flow control range of the piston valve is smaller, and its flow control range is generally between, while the flow control range of the pinch valve is larger, and its flow control range is generally between 10-1000m h.

Finally, the pressure control range of the piston valve is smaller, and its pressure control range is generally in between, while the pressure control range of the pinch valve is larger, and its pressure control range is generally in between.

In conclusion, there are some significant differences between piston valves and pinch valves, their structures are different, the flow control range is different, and the pressure control range is also different.

1. The sealing area is different, the plug valve is a face seal (the ball valve is a seal or ring seal), the sealing area is much larger than that of the ball valve, so the torque is also larger;

2. After hardening and spraying, the ball valve can be suitable for the tight closed wear-resistant condition of fast shut-off, and the plug valve is not suitable;

First, the principle of the plunger valve

The opening and closing system of the plunger valve is mainly composed of a plunger and two sealing rings, when the plunger is rotated to open the plunger valve, the plunger slowly moves upward, inserts it in the middle of the sealing ring, and opens the flow channel; When closed, the plunger moves downwards and inserts into the seal underneath to intercept the flow path and remain isolated from the outside world without leakage.

Second, the manufacturer of piston valves

1. Cool Pump and Valve Manufacturing.

Cool Pump & Valve Manufacturing **** is located in Songjiang District, Shanghai, is a company specializing in research and development, production and sales of various pump and valve equipment, the main products are sewage pumps, centrifugal pumps, plunger valves, etc., the company since its inception, from the introduction of advanced technical personnel from major universities, and in every aspect of equipment production, strict management of quality, is committed to producing high-quality products in a harsh environment.

2. Gongzhou valve.

Gongzhou valve **** is located in Fengxian District, Shanghai, the company from the early days of the introduction of very advanced processing and quality inspection technology from Taiwan, strict management of product quality, and strive to provide customers with satisfactory valve products. The company strives to reduce the cost of investment under the premise of ensuring product quality and quality, so as to be able to provide customers with more high-quality and low-cost equipment products.

3. The old lathe valve ****.

Located in Liaocheng City, Shandong Province, the company is committed to R&D, production, processing and sales of various valve equipment, the company has accumulated a very rich practical experience and broad network of contacts in the course of many years of development, laying a very good foundation for future development. At the same time, in terms of product quality and service, it has also won the recognition and support of new and old customers.

3. The difference between a piston valve and a globe valve

1. The plunger valve relies on the up and down movement of the plunger to complete the opening and closing of the whole valve, and the interception element of the globe valve is a valve disc, and the linear motion is done along the direction of the fluid to complete the opening and closing of the valve;

2. The sealing area and effect of the plunger valve are much larger than those of the globe valve;

3. The plunger valve can adjust the flow to a certain extent, but the globe valve can only play the role of opening and closing the valve.

The regulation performance of piston valves and ball valves is very different

1. The adjustment performance of the plunger valve is worse than that of the ball valve, and the flow adjustment range of the plunger valve is smaller, and the size of the flow can only be adjusted, while the ball valve can adjust the size and flow rate of the flow.

2. The adjustment accuracy of the plunger valve is lower than that of the ball valve, and the adjustment accuracy of the plunger valve can only reach 5%, while the adjustment accuracy of the ball valve can reach 1%.

3. The adjustment key of the plunger valve responds slower than that of the ball valve, the adjustment response speed of the plunger valve is slow, and the adjustment response speed of the ball valve is fast.

4. The adjustment stability of the plunger valve is lower than that of the ball valve, the adjustment stability of the plunger valve is lower, and the adjustment stability of the ball valve is higher.