Centrifugal pump mouth ring wear, clearance standards
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During the operation of centrifugal pumps, the ring at the inlet area wears out, resulting in an increased gap. I have checked standards such as API610 and GB3215; these standards only specify a minimum value for the gap, but there is no upper limit specified for the gap after wear. Does anyone among you know of any standards related to this issue? Please share them if you do
This seems to be equivalent to a rejection criterion; it doesn’t seem to be available: L
Setting a minimum gap for the API face ring is intended to prevent seizure, but the maximum value should be determined by various industries or companies based on the medium used, operating conditions, and efficiency requirements. For example, Table 8 in the \"Centrifugal Pump Maintenance and Repair Procedures\" SHS 01013-2004 provides upper and lower limit standards for the clearance between the face ring, thrust washer, and shaft sleeve, which can be used as a guide for maintenance or replacement
This post was last edited by 3983596_FPPZ on 2019-5-30 at 16:46. By combining various suggestions regarding different clearances and conducting statistical analysis, a standard for the maximum wear clearance value was established: 1.4 times the maximum clearance value specified in the drawings (for the minimum solid state) is taken as the maximum wear clearance value, rounded to two decimal places, which results in a relatively strict standard.
The range of the mouth ring clearance in centrifugal pumps depends on factors such as the medium, temperature, and process requirements. Generally, end users provide these parameters to the pump manufacturer, who will then include them in the accompanying technical documentation. Each manufacturer has different standards! ! The standard version can be found online, but the specific decision still needs to be made based on actual circumstances! !