BWCB jacket insulation is properly installed pump flanges and valves connected
BWCB jacket insulation is properly installed pump flanges and valves connected
1, BWCB valve gate insulation jacket pipe and flange surfaces should be free of damage, scratches , etc., and keep them clean. In particular the use of the metal gasket ( oval or octagonal cross-section ) , when the slots of the flange should be consistent with the washer to be painted with red lead research in order to ensure good sealing state
2 , vertical and flange -bolt flanged error surface and centerline BWCB jacketed pipe heat pump piping should be within the allowable range of values . After the valves and piping centerline to reach agreement , and then install it.
3, BWCB jacket heat pump connecting the two flanges, first get the flange gasket sealing surface and uniform compaction, thereby ensuring a stress by the same bolt flange connection.
4 , when the fastening bolt, the nut using a wrench to match , when using a hydraulic , pneumatic tightening , up to the specified torque .
5 , the fastening flanges to avoid uneven force should be in accordance with the symmetrical cross -defined sequence of tightening direction .
6, the flange mounting , make sure all the bolts evenly strong nut .
7 , bolts, nuts material must comply . After fastening nut bolt head should be exposed both pitch is appropriate.
8, the fastening bolts and spirals , in order to prevent loosening due to vibration , to use gaskets. In order to avoid the high temperature adhesion between threads , the thread should be coated with a release agent site ( molybdenum disulfide ) during installation.
9 , for valve temperatures above 300 degrees Celsius , the temperature rise in the need for flange bolts, tighten the valve cover bolts, bolts and packing pressure pressure seal cap bolts tightened again.
10 , the low temperature in the valve is in the installation state of the atmospheric temperature . Practical application, when the medium becomes low temperature by , due to the formation temperature, flanges, gaskets , bolts and nuts, etc. contraction occurs , and because these components are not the same material , each of the different linear expansion coefficients , the formation environmental conditions are very likely to leak . This departure from the objective conditions at atmospheric temperature fastening bolts must be used when considering the shrinkage factor of the low-temperature parts of the torque.
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