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understand that the City's insurance company has also expressed interest in having the <br />vesselinspected. <br />If the vessel requires replacement the system would have to be shutdown far <br />approximately 8 weeks. <br />B. Rebuilt Cnmt�ressors, Industrial grade reciprocating compressars, such as the existing <br />compressars, typically need a�najnr overall every 5,000 hours or so. If this has not been <br />performed within the recommended timeframe, it should be completed during the <br />improvements. <br />C. Replace dump solenoids on each pumper. Typically Holtttsten installed solenoid valves <br />by Sparlan. These valves have a tendency to dry out. Solenoid valves manufact�irad by <br />Hanson ar Parker seem to wark better far this application and reportedly have less <br />problems. Replace one valve on each pumper drum. <br />I�. �i iac�.�� �l� ��ti�i�l.ti �,r. t;�t I'��E�f w�i�r �a�x►� ���Ear'sal�. 'l�i�,�E�}� i l;�i i:��icr� <br />i r.4� � I's d�ne+ri�r� tin�ti�t 14i��i�. I h iti vi��tit• �;�p:��'� ti� L�r� �t°T 1�4 �►1ae�# wii �� �n � i���r <br />quality valve as manufactured by Hanson due to the inadequate space. <br />E. Replace relief valves on vessels, add to pumpers. The existing valves are likely ariginal <br />and should be replaced to assure proper warking arder of these safety devices. Relief <br />valves are required on all pressurized vessels over three cubic feet in volume. <br />F. Replace pipe insulation on entire refri�eration �acka�e. The existing insulation is in poar <br />condition. Poar ar inadequate insulation leads to lower system efficiency, pipe corrosion <br />and difficulties in maintenance due to frost build up. The insulation should be replaced to <br />ensure the most efficient operation. <br />G. RepIace isolation valves. Replace the three (3) isolation valves on the refrigeration <br />mains to and from the refrigeration package. The internal parts of the valves wear out <br />over time. They should be replaced if found to be [eaking, <br />N. Replace needle valve to each numner. These valves have reached their useful, <br />dependable lives and should be replaced. <br />The cost estimates far the two refrigeration system options are presented in Table 7 below. This <br />report did not go into deptEi comparing the advantages a��d disadvantages of direct refrigeration <br />systems with indirect refrigeration systems. If you would like additional information comparing <br />these two systems we aa�� provide that to you. <br />1 �a� <br />