Chemical resistance to acid and alkali corrosion fluorine plastic types of centrifugal pump mechanical seal performance is introduced

Chemical manufacturer in the chemical industry for conveying acid alkali and corrosive liquid, naisuanjian corrosion fluorine plastic pump of choice for centrifugal pump is a chemical manufacturer, naisuanjian corrosion fluorine plastic centrifugal pump can transport any concentration of acid and alkali salt, organic solvents, such as strong corrosion liquid. Fluorine plastic centrifugal pump adopts mechanical seal, mechanical seal, a lot of more phyletic, common have single mechanical seal, such as double mechanical seal, seal form is different, use effect method is different also, mechanical seal is the use of two surfaces friction between the principle of operation, to achieve the purpose of sealing. Rotating seal face installed in the water pump shaft, the fixed seal face installed in the gland. Due to a sealing surface is in motion, and the other a sealing surface is stationary, so will the class is called dynamic sealing seal. A, resistant to acid and alkali corrosion fluorine plastic centrifugal pump mechanical seal has corrosion resistance, corrosion and wear problems in use process have? In order to keep each other between the sealing surface, spring between the mechanical seal and motor spindle constant adjustment. When the rotation surface using artificial rubber seal, between the spindle and the elastomer will back and forth on the spindle motion. Will this repeat friction, abrasion on the main shaft of anti-corrosion materials, loss of the spindle of the oxide film layer, eventually formed on the surface of the spindle of the friction wear grooves, cause liquid leakage from the groove, and add the necessary maintenance workload or even replace the spindle. In order to solve this problem, generally in the packing box installed a replaceable shaft sleeve. The only permanent solution to solve the problem of corrosion and wear is to remove the internal dynamic seal. Now, most of the main seal factory production of corrosion and wear type seal, in order to prevent the corrosion and wear of pump parts. Second, inside outside seal and seal typically install the seal in the interior of the stuffing box. But this kind of practice in the seal repair will removed the wet end of the pump, its main advantage is sealed environment is easy to control. Outer seal installation way is to the direction of the static sealing surface upside down, the rotation of the spindle on unit is located in the packing box of the outside of the gland. Easy to install, seal main have: Costs are relatively low; Can be continuous monitoring and clean; Suitable for not installed inside the sealed small packing box; Because of its location close to the bearing, less influence on the difficulty of spindle deviation. Its main drawback is that the centrifugal force will solid particles from under the seal of the left to the sealing contact surface. Therefore, this type of seal is mainly used in clean and does not contain abrasive liquids. Three, double seal and double seal liquid blocking device generally has three kinds of design pattern, adopt double seal face seal instead of the single seal with a higher degree of leak proof properties. This kind of dual sealing are mostly applied in volatile strong, poisonous, easy to cause cancer, dangerous and poor lubricity of the liquid. Every type of demands between the dual sealing surface using a liquid blocking system, in order to prevent leakage of liquid or gas. Double seal is a kind of low cost which are frequently used in installation of sealing back-to-back way, the rotating seal face in the opposite direction. It often requires a cut off the liquid, the pressure should be higher than the pressure of stuffing box, about 20 psi, so that it can guarantee the internal seal have always been able to get cut off the lubrication of the liquid, but also to ensure that the sealing surface reaches a certain sealing pressure. The third design type seal USES a serial type arrangement, namely both rotating seal face away from the impeller, the same direction. Cut off the seal liquid pressure generally below the pump pressure. In fact is equivalent to two seal, two-stage step-down joint working device. In order to make the whole driving operation process to achieve the goal of zero leakage, seal industry has also developed gases trap seal, this kind of seal use the kind of inert gas such as nitrogen to replace the liquid barrier system. In gases trap the double seals, if the sealing surface of internal fault occurs, the leak is inert gas, and its internal fluids from leaking, so as to not cause environmental pollution. Four, cartridge seal cartridge seal is a collection of all functions in one of the sealing device, use this seal can simplify the installation program, at the same time can protect the internal each element, against accidental damage. Its internal includes all of the sealing element, gland, and shaft sleeve. Because this kind of seal does not require any installation measures strictly, greatly simplify the installation program, at the same time, sealing surface and seal elastomer are very good protection, to prevent accidental damage. These advantages also means that reduces the maintenance and replacement of the seal. Almost all cartridge seal can be bought in the market, so can reduce the use of risk factors, but also can save use common seal inherent in the maintenance time.
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