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J. Initial Operational Problems

85. 48-Inch Butterfly Valves. The butterfly control valves (sec. 79) were first placed in operation early in May 1952. With a reservoir head of less than 50 feet it was found to be extremely difficult to operate the valves with the handwheel, and trouble with the motor control relays and torque switch prevented reliable motor operation. Investigation revealed that the operating mechanism had been inadequately designed 2/. (The valves were procured from the R-S Products Corporation under performance-type specifications and their design was not reviewed by the Bureau.) S. Morgan Smith Company, parent company to the R-S Products Corporation, constructed new valves and adequate operating mechanisms (fig. 34), which are scheduled for installation in the fall of 1954. Meanwhile, operation of the valves is according to a scale of partial openings which it is considered will not result in stresses exceeding 30 percent of the ultimate strength of the mechanisms, both valves being operated simultaneously. Figure 33 shows the completed outlet works with both valves of the original installation operating at full opening.

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Figure 33. --Completed outlet valve house, with both butterfly valves (initial installation) discharging at full opening and 57-foot head.

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Figure 34. --48-inch butterfly control valve with improved operating mechanism, scheduled for installation in the fall of 1954. June 1952 (Compare with fig. 11)

FIELD NOTE
Field to provide
reinforcement for
and construct pedestol

E1.9898.85

NOTE

48 Butterfly valves, drive yokes and linkages, floor
stands,Limitorque motors and electrical controls are being
furnished by R. 5. Products Corporation.

253-D-304

813314 253-D-298

UNITED STATES

DEPARTMENT OF THE INTERIOR
BUREAU OF RECLAMATION

SAN LUIS VALLEY PROJECT - COLORADO

PLATORO DAM

OUTLET WORKS

48 BUTTERFLY VALVES AND AUXILIARIES REVISED INSTALLATION

DRAWAL.MS.

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SUBMITTED

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APPENDIX

APPENDIX A

Breakdown of cost by pay items for specifications No. 2594--Platoro Dam

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