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Document Number:

TC003001-01

Revision

: Rev 2

DEMCO® Resilient-Seated Butterfly Valve

Installation, Operation, and Maintenance Manual

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Содержание Demco

Страница 1: ...Document Number TC003001 01 Revision Rev 2 DEMCO Resilient Seated Butterfly Valve Installation Operation and Maintenance Manual ...

Страница 2: ... included in this book are to be performed in conjunction with the requirements and recommendations outlined in API Specifications Any repairs to the equipment covered by this book should be done by an authorized Cameron service representative Cameron will not be responsible for loss or expense resulting from any failure of equipment or any damage to any property or death or injury to any person r...

Страница 3: ...gh 12 Resilient Seat Butterfly Valve Table 1 DEMCO 2 through 12 Parts List Item Qty Description 1 1 Body 2 1 Seat 3 1 Disc 4 1 Upper Stem 6 1 Lower Stem 7 2 Spring Pin 14 1 Retainer 22 1 Top O Ring 23 Stem O Ring 24 2 Bearing 4 required for throttling valves only ...

Страница 4: ...able 2 DEMCO 14 through 36 Parts List Item Qty Description 1 1 Body 2 1 Seat 3 1 Disc 4 1 Upper Stem 6 1 Lower Stem 7 2 Spring Pin 14 1 Retainer 23 Stem O Ring 24 2 Upper Bearing 25 1 Lower Bearing 4 required for throttling valves only 24 36 spacer 24 7 4 14 24 23 2 3 7 6 1 23 23 23 25 ...

Страница 5: ...le 3 DEMCO Resilient Seated Butterfly Valve Nameplate Information Item Stamp 1 Product ID Number 2 Product Description 3 Body Material 4 Disc Material 5 Seat Material 6 Stem Material STORAGE DEMCO Resilient Seated Butterfly Valves are shipped in the partial open position to minimize permanent deformation of the resilient seat The disc edge is contained within the flange faces of the valve to preve...

Страница 6: ...ly close the valve the disc must be contained within the confines of the valve body so it will slip between the mating flanges without contact with the flanges 3 When installing wafer body valves install the lower flange studs without tightening Position the valve between the flanges within the pocket formed by the flange studs The OD of the wafer body is equal to the inside of the bolt circle of ...

Страница 7: ...commended for use with positive shut off DEMCO Resilient Seated Butterfly Valves An integral flange seal is molded into the edge of the rubber seat eliminating the need for flange gaskets Throttling Valves only utilize an O ring stem seal that must be assisted with flange gaskets for a proper seal FLANGES Steel ASME Class 150 or MSS SP 44 weld neck flanges are suitable for all sizes Slip on thread...

Страница 8: ...2 75 1 1 8 7 16 10 50 32 3 50 20 25 00 1 1 8 7 20 11 75 40 4 00 24 29 50 1 1 4 7 20 12 50 40 4 00 30 36 00 1 1 4 7 56 5 00 36 42 75 1 1 2 6 24 Studs 1 1 4 7 x 15 50 8 Capscrews 1 1 4 7 x 5 00 28 Studs 1 1 2 6 x 18 50 8 Capscrews 1 1 2 6 x 5 50 56 Capscrews 1 1 2 6 x 6 00 8 Capscrews 1 1 2 6 x 5 50 DISC PIPE CLEARANCE Before beginning installation disc pipe clearance should be checked Figure 10 to ...

Страница 9: ... perpendicular the valve is closed MANUALLY OPERATED DEMCO Resilient Seated Butterfly Valves operate from fully open to fully closed by a 90 turn of the handle The handle is marked with a flow arrow When this arrow is in line with the pipe axis the valve is open Figure 11 When perpendicular to the pipe the valve is closed Figure 12 Valve Size in Disc Swing Size in Opens into Std Pipe Sch 40 Sch 80...

Страница 10: ...c actuators for remote operation To prevent water hammer actuators should close the valve slower than 6 to 8 seconds open to close Rapid closure causes water hammer which can break or otherwise damage valve parts MAINTANENCE PROCEDURES TROUBLESHOOTING Table 6 Troubleshooting Trouble Probable Cause Remedy The valve will not seal properly The seat and or disc is worn or damaged Replace worn parts Fo...

Страница 11: ...anges Clockwise rotation of Gear Operator handwheel opens valve Open Shut indicators do not coincide with valve disc position Gear operator has been rotated 90 on valve top Handwheel shaft aligns with pipe should be perpendicular Rotate gear operator 90 on valve top to put input shaft perpendicular with pipe axis Automatic actuator slams valve shut or open Speed control valves missing or not adjus...

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