Determination of Interval Preventive Care Sulphate Sodium Production Machine with Reliability Centered Maintenance (RCM) Approach (Case Study at PT SPV Purwakarta)

Abstract

PT SPV is a company engaged in manufacturing that has a vision to be a company that produces
quality sodium sulphate products until 2021. Historical data for 2017 and 2018 show the sodium sulphate
production machine, which is a Centrifuge machine that functions to separate solids and liquids from sodium
sulphate solutions has value the biggest downtime is 148.5 hours which results in disruption of the
production process. The high value of downtime is caused by the company not having scheduled
maintenance activities so that the machine often stops suddenly when operating. The purpose of this study
was to determine the preventive maintenance intervals of the sodium sulphate production machine using the
Reliability Centered Maintenance (RCM) approach. Where the RCM method will be integrated with the
Failure Mode Effect Analysis (FMEA) method which is used as a failure mode analysis that occurs by
calculating the highest Risk Priority Number (RPN) value on the machine and then calculating the damage
time interval as a basis for determining the maintenance schedule to be performed. Based on the results of
the study obtained the results of the failure mode analysis of centrifuge machines and critical components
that most often experience damage, namely the second basket stage component. The second basket stage
will experience sudden damage every 1814 hours based on the MTTF value and it is found that the average
repair time of the second basketball stage component is 16.54 hours based on the MTTR value. The results
of determining the treatment time interval with the criteria for minimizing downtime is 65 days for the
maintenance time interval. Maintenance cost savings of Rp.4,108,778.5 or 74.10% when compared to the
cost of corrective maintenance or scheduling of maintenance of the previous pusher centrifuge machine.