Correct installation corrosion-resistant chemical centrifugal pump sealing gasket steps

As modern modern industry, especially in petroleum, chemical industry, nuclear industry, the rise of a large power station, pressure vessel to the high temperature and high pressure, high vacuum, chemical pump, corrosion resistant pump, cryogenic and large equipment, as well as corrosion resistance, the gasket seal continuously put forward new requirements, a variety of new materials, new structures appear constantly, the sealing performance is also different. In addition, the change of temperature, pressure fluctuation, the unwinding of the bolt pre-tightening force, the flange of the tilt, dislocation, sealing surface defects, corrosion medium will have great influence on the sealing effect.

corrosion-resistant chemical centrifugal water pump shaft seal way generally has two kinds: packing seal and mechanical seal, how to according to the working condition of the right to choose the suitable sealing gasket, and how to properly installed to insure the effect of chemical water pump seal is the key. Small make up today focuses on how to correctly install corrosion resistant chemical centrifugal water pump sealing gasket. After the calibration of torque wrench, hydraulic tightening the wrench or other tightening tools; Steel wire brush, brush brass is better; The helmet. Eye protector glasses; Lubricant; Other factory regulations, tools etc. Clean and tight firmware need specific tools, in addition, must always use the standard installation of equipment and observe the operation method of good security. 1. Check and clean up: (1) from the gasket compression surface, all kinds of fasteners ( Bolts, double-headed bolt) Remove foreign material, nuts and washers and debris; (2) check the fasteners, nuts and washers on the presence of burrs, crack defects such as; (3) check whether there is any warping deformation on flange surface, have without radial scratch, presence of depth of minor tool marks, or other defect affecting the gasket seating right; If it is found that original defects, should be replaced in a timely manner, such as have some doubts about whether to replace, can timely contact seal manufacturers. 2. For flange, the flange and bolt holes are, for any situation that is not to get positive, should submit the report in a timely manner. 3. Install the gasket: (1) confirm the gasket conform to the specified size and specify the materials; (2) check the gasket to ensure there is no defect; (3) between the two flanges carefully inserted sealing gasket; 4. Confirm the gasket between the flange in the center position; (5) unless the gasket installation instructions, requires the use of adhesive and adherend resistant, otherwise cannot be used without authorization; 6 aligned flange surface to ensure the gasket is not been stabbed or cut. 4. Lubrication bearing surface: (1) lubrication bearing area is only allowed to use prescribed or approved lubricant; (2) in all of the thread, the stress of the nuts and washers on the blot out enough lubricant; (3) ensure lubricant polluting the flange surface or the surface of the gasket. 5. Install and tighten bolts: 1) never use the right tools; (2) using the calibrated torque wrench, tighten tools or other can control function; (3) to seal factory technical department consultation about torque requirements and regulations; Turn the nut (4) when carried out in accordance with the 'cross symmetry principle'; Tighten nut according to the following five steps: first step: the initial tighten all of the nut shall be carried out manually, larger nut can use small manual wrench auxiliary tighten; Step 2: tighten each nut is about 30% of the total torque required; Step 3: each nut tighten roughly the 60% of the total torque required; Step 4: using 'cross symmetry principle' tighten again each nut, the 100% of the total torque required note: large diameter flange to the above steps can be used more times; Step 5: at least a clockwise one by one all tighten nut meet the full needs of the torque. 6. Tighten bolt again: (1) should consult seal factory technical department about the guidelines and Suggestions to tighten bolt again; (2) have been used by high temperature after the no asbestos gaskets and of gaskets, rubber must not tighten again ( Except where otherwise stipulated by the state) ; (3) received corrosion thermal cycle of fasteners, need to tighten again; (4) to tighten the operation should be performed at ambient temperature and atmospheric pressure.
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