Introduction of rubber lined valves
Rubber lined valves main lining materials [lined with butyl rubber, lined with natural rubber, lined with EPDM rubber, lined with neoprene, lined with nitrile rubber, lined with fluorine rubber, lined with silicone rubber, hard rubber, soft rubber]; Rubber lining applicable media: in addition to strong oxidizing agents (eg, nitric acid, chromic acid, concentrated flow of acids and peroxide and other hydrogen peroxide, etc., and organic solvents) other than hydrocyanic acid, 50% fluosilicic acid, hydrochloric acid, 30% sulfuric acid, 50% hydrofluoric acid, 85% phosphoric acid, alkali, salts, metal-plated solutions, hydroxide, potassium hydroxide, neutral saline solution, 10% sodium hypochlorite, wet chlorine, ammonia, most alcohols, organic acids and aldehydes, cement, lime slurry, vegetable oils, elemental gases, ethers, ketones, esters, desalination, purification of water, and other media;
Gel-lined valves
With the modern industrial development, rubber-lined valves and its various piping accessories in the petroleum, printing and dyeing, chemical industry and other fields in the rapid application of the promotion, showing a strong vitality, as the project preferred project has aroused the great concern and favor of the engineering design units and construction units, is a kind of sunrise products with great market potential.
The rubber lined valve is with switch and flow regulation dual function, can be convenient to open and close the airway, without affecting the flow, to ensure the repeatability of the flow. Open up slowly, reducing the impact of instantaneous pipeline pressure on the instrument. Quite add a damper, thus greatly improve the service life of needle valve. Rubber lined valves dedicated to the control of corrosive or highly corrosive media, the valve body cavity surface covered with a variety of optional rubber, suitable for different operating temperatures and fluid pipeline, with high strength, good corrosion resistance.
Rubber lined valve manufacturer
Ned Rubber Pipe Valve Industry Co., Ltd. is my personal first rubber lined valve manufacturer, the main reason is that they have too many company partners, so I was shocked, because they cooperate with the company is a large-scale well-known manufacturers, all add up to more than 1,000 cooperative enterprises, such as the famous ones: Zijin Mining, Silver Non-ferrous Group, Jiangxi Copper, Shougang Jingtang Iron and Steel, Hebei Iron and Steel Mining and so on, in addition to their company is also a nationally renowned hose valve series, rubber-lined valve pipeline series, as well as one of the new special rubber R & D manufacturers, it is these big data of their company y attracted me.
The second Wuhu Hongda Rubber Valve Manufacturing Co., Ltd. is slightly inferior, but their main types of products are still a lot of production, at present they produce the main products are: water conservancy cyclone, rubber-lined globe valves, rubber-lined gate valves, rubber-lined check valves, wear-resistant piping, flexural rubber joints, ceramic metal processing products and so on, the variety of products is still very admirable.
Rubber lined valve installation
1, installation, attention should be paid to proofreading the valve sign (such as valve type, nominal diameter, pressure level, material, etc.) is consistent with the use of the requirements of the shell of the flow direction marking is consistent with the pipeline flow direction.
2, installation, try to achieve horizontal installation, so that the valve stem facing up. Prevent the valve from skewing the valve in the natural state of installation, to prevent the valve due to piping, support and other large installation stress, installation and lifting shall not use the handwheel for valve lifting.
3, installation, and the valve ends of the rubber lined sealing surface of the pipeline flange sealing surface connected to the metal, shall be added sealing gasket. The flange sealing surface connected to it should be according to the structure of Figure A, not the structure of Figure B, otherwise it will lead to premature damage and leakage of the valve sealing surface.
4, if the pipeline has sufficient strength to withstand the weight of the valve and operating torque, the valve can be without support, otherwise, should be rubber-lined valves set up a special support point.
5, after installation, in the system or pipeline pressure test, the valve must be in full open position.
The use of rubber-lined valves must be noted
1, before use, carefully read the product instructions.
2, according to the nameplate or instructions on the pressure, temperature, the use of media range.
3, the use of rubber-lined valves to prevent excessive pipeline stress due to temperature changes, try to minimize temperature changes, and increase the valve before and after the U-shaped expansion joints.
4, prohibit the use of levers to open and close the rubber-lined valves, pay attention to the rubber-lined valves open and close the position of the instructions and limit devices, open and close in place, do not force the closure, to avoid premature damage to the rubber sealing surface.
5, for some of the medium is unstable and easy to decompose (such as the decomposition of some media will cause volume expansion resulting in abnormal pressure rise) will cause damage to the valve or leakage, measures should be taken to eliminate or limit the factors that cause the decomposition of unstable media. In the valve selection, should take into account the unstable decomposition of the media may cause changes in working conditions and choose to have an automatic pressure relief device rubber-lined valves.
6, for toxic, flammable, explosive, strong corrosive media pipeline rubber-lined valves, it is strictly prohibited to replace the packing under pressure. Although rubber-lined valves in the design of the upper sealing function, but also not recommended in the pressurized state to replace the packing.
7, for the pipeline with spontaneous combustion medium, to take measures to ensure that the ambient temperature and working temperature shall not exceed the spontaneous combustion point of the medium, to prevent the sunlight or external fire hazards.
8, for the pipeline vibration of intense and long-term, to take measures to eliminate, to avoid the resulting damage to the rubber lined valve.
9, rubber lined valves in the process of use, rubber sealing surface due to the soft texture, often due to media crystallization, solid particles will sealing surface damage, resulting in sealing leakage, found in a timely manner after the refurbishment or replacement of seals.
10, some rubber lined valves in the use of the middle part of the opening as a flow rate adjustment, high-speed media lead to premature damage to the sealing surface, encountered this situation, to replace the seals in a timely manner.
11, rubber-lined valves in the flange generally do not add gaskets. If encountered in the flange leakage, can be evenly tightened in the flange nut to eliminate leakage. If the middle flange sealing surface is damaged, it is necessary to take to repair the sealing surface and add the middle flange gasket to solve the problem.
12, if the handle or handwheel rotation is not flexible or can not open and close the rubber-lined valves, can be appropriate to loosen the gland nut. The rotation is still not flexible. It may be that the gland is skewed, to correct the gland. After correcting and loosening the gland can not be flexible to open and close and fluorine lined valves, should be disassembled to check, remove dirt, troubleshooting. Disassembly of such rubber-lined valves, should pay attention to the rubber-lined valve pipeline is what medium, is used, or newly installed. If the medium used is toxic, flammable, explosive substances, the staff should wear protective masks and rubber gloves, wear protective clothing in accordance with operating procedures. Avoid accidents during disassembly and eliminate accidents.