What kind of rubber is the acid and alkali resistance of the rubber lined diaphragm valve

The acid and alkali resistance of the rubber-lined diaphragm valve is ethylene propylene propylene mitten, fluorine rubber, etc.!

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following are the top ten domestic first-line valve brand manufacturers in 2022-2023, but for reference only: Suzhou Neway Valve Co., Ltd., Shanghai Guanlong Valve Machinery, Shanghai Qizhong Valve Manufacturing, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

Rubber Lined Globe Valve Rubber Lined Globe Valve Product Details Globe valve refers to the valve that is driven by the valve stem and does a lifting movement along the central axis of the valve seat, which is mainly used to connect or cut off the medium in the pipeline on the pipeline, but cannot be used for throttling. The basic structure of the rubber lining globe valve 1, the plastic lining straight-through, straight-slip and angle globe valves have the advantages of compact structure, flexible opening and closing, strong corrosion resistance, and short stroke (generally nominal passage 1 4). It is widely used in petroleum, chemical and other pipeline systems as a truncation medium.

1. The valve should be stored in a dry and ventilated room, and it is strictly forbidden to stack it.

2. Both ends of the passage of the stock valve must be sealed to prevent foreign matter from entering the inner cavity and damaging the sealing parts. And avoid contact with oil or other flammable materials.

3. The metal processing surface of this valve should be cleaned of dirt and coated with rust inhibitor.

4. Do not paint grease on the surface of the rubber lining layer or rubber diaphragm, so as not to cause rubber swelling and affect the service life of the valve.

5. During the storage period or the deactivation period, the handwheel should be rotated counterclockwise to make the valve in a slightly open state to avoid the diaphragm losing its elasticity due to long-term pressure.

6. During transportation or installation, the sling shall not be tied to the handwheel or valve stem. And it is strictly forbidden to collide with other metals or hard objects to prevent damage to parts and linings. String 6

7. Before installation, the operating conditions of the pipeline and whether the medium are consistent with the scope of application specified in this valve should be carefully checked to avoid unnecessary losses caused by improper selection, which may lead to accidents.

8. In addition to not being suitable for vacuum pipelines, this valve can be installed at any position of the pipeline for two-way flow, but it should ensure the convenience of operation and maintenance.

9. During installation, the inner cavity of the valve should be cleaned to prevent dirt from jamming or damaging the sealing parts, and check whether the connecting bolts of each part are evenly tightened.

10. During operation, the parts in contact with the medium must be checked frequently, and the vulnerable parts must be replaced regularly according to the actual use.

11. When the diaphragm needs to be replaced, care should be taken not to tighten the diaphragm too tightly or too loosely.

12. If this valve is used in intermittent operation pipelines, the parts in contact with the medium should be cleaned during the period of stop use to prolong the service life.

13. When manually operating the longitudinal valve, the valve shall not be opened and closed with the help of auxiliary levers, so as to avoid excessive torque and damage to the driving parts or sealing parts.

14. Before the application of the overhauled valve, the tightness test shall be carried out according to the relevant test regulations, and it can only be installed after it is qualified. And make a good maintenance note for future reference.

Pneumatic Rubber-lined Diaphragm Valve:

The compressed air is used as the power to drive the transmission screw to make the valve core move up and down, and at the same time pull the diaphragm up and down to make it close and open. Its characteristics are: compact structure, simple, small size, beautiful appearance; The switch is guided and moves smoothly; The closing torque is small and the service life is long, 300,000 times; The diaphragm compression can be automatically adjusted, the pressure is uniform, and the sealing is reliable; The diaphragm is inserted into the spool and is easy to replace.

Electric Rubber-lined Diaphragm Valve:

1. The valve is composed of valve body, valve cover, valve stem, valve disc, diaphragm, and other driving parts.

2. The opening and closing of the valve is achieved by driving the valve stem nut by the connecting shaft of the electric device, so that the valve stem is driven to lift and lower when the valve stem moves axially.

3. When the power supply is interrupted due to failure, and the valve needs to be opened and closed urgently, the "hand-electric switching handle" should be converted to the position engraved with manual marking, and then the flashing door can be opened and closed by rotating the handwheel. When rotated in a clockwise direction, the valve can be closed; Otherwise, it is turned on.

4. When it is necessary to resume electric operation, the "switch handle" must be converted to the position engraved with electric markings before electric operation can be carried out.

Rubber-lined diaphragm valve products are focused on the situation: Diaphragm valve is a special form of valve with cut-off function, its opening and closing parts are composed of steel disc and soft material (rubber and fluoroplastic composite) made of diaphragm, and the valve body cavity is separated to achieve the purpose of cutting off the medium in the pipe. Basic structure 1, the composite diaphragm separates the lower cavity of the valve body from the inner cavity of the valve cover, and forms a DC channel with it, so that the valve stem, valve disc and other internal parts of the upper part of the diaphragm are completely isolated from the medium, and the packing slag seal structure is omitted, and the internal leakage and external leakage of the medium can be avoided at the same time.

1.The biggest difference between the rubber-lined diaphragm valve and other valves is that it adopts a stuffing box-free structure; The rubber diaphragm can make the corrosive medium in the flow channel completely isolated from all the driving components, so as to eliminate the disadvantages of "running, running, dripping, leaking" and other disadvantages of the usual valve.

2.Due to the smooth flow path of the diaphragm valve, the flow resistance is small, so a large flow rate can be obtained.

3.The surface of the valve body cavity is restored with a variety of rubbers for selection. Therefore, it has superior corrosion resistance.

4.The closure is a flexible rubber diaphragm. Therefore, it also has a good airtightness and a minimum closing force.

5.The rubber-lined diaphragm valve is a valve body composed of valve body, valve cover, valve disc, valve stem, diaphragm and other driving parts.

6. According to different visual wrap materials, it can be applied to different fluid medium pipelines at different temperatures, as an opening and closing mechanism to control the flow of medium.

The most prominent feature is that the diaphragm separates the lower valve inner cavity from the upper valve cover inner cavity, so that the valve stem, disc and other parts located above the diaphragm are not corroded by the medium, eliminating the packing sealing structure, and will not produce medium leakage.

1. The diaphragm made of rubber or plastic and other soft seals has good sealing. Since the diaphragm is a wearing part, it should be replaced regularly depending on the characteristics of the medium.

2. Limited by the diaphragm material, the diaphragm valve is suitable for occasions with low pressure and relatively low temperature.

3. According to the structural form, the diaphragm valve can be divided into six types: house type, DC type, cut-off type, straight-through type, gate type and right-angle type; The connection form is usually flange connection; According to the driving mode, it can be divided into manual, electric and pneumatic three types, of which pneumatic drive is divided into three types: normally open, normally closed and reciprocating.

4. Generally, it should not be used in pipelines with temperatures higher than 60 degrees and conveying organic solvents and strong oxidizing media, nor should it be used in pipelines with higher pressures.

The rubber-lined diaphragm valve is a special form of shut-off valve that appeared in the 20s of the 20th century. Its opening and closing part is a diaphragm made of soft material, which separates the valve body cavity from the valve cover cavity and the driving parts, so it is called a diaphragm valve. Its most prominent feature is that the diaphragm separates the lower valve body cavity from the upper valve cover cavity, so that the valve stem, disc and other parts located above the diaphragm are not corroded by the medium, eliminating the packing sealing structure, and will not produce medium leakage.

Leak rate: . l/s

Material: WCB L

Working medium: gas, water, oil.

Operating temperature: Viton -30 +150