APCO CAC-8000 AUTOMATIC CONTROL CHECK VALVE
Instruction
D12000
December 2012
Page 1: ...APCO CAC 8000 AUTOMATIC CONTROL CHECK VALVE Instruction D12000 December 2012 ...
Page 2: ...any potential pipeline material in the valve Inspection Your APCO CAC 8000 Automatic Control Check Valve has been packaged to provide protection during shipment however it can be damaged in transport Carefully inspect the unit for damage upon arrival and file a claim with the carrier if damage is apparent Electric Motor Operation and Maintenance Manual Consult the Electric Motor Operation and Main...
Page 3: ... visit our website at www dezurik com Table of Contents Description 4 Handling 4 Maintenance 4 Fusion Powder Coated Valves 4 Drawings 5 Operation 6 Check Valve Function 6 Flow Control Throttling Function 7 Shut Off Function 8 Drain Valve Function 9 Start Up Procedure 10 Oil Filling procedure Dashpot Piping Partially Drained of Oil 11 Oil Filling procedure Dashpot Piping Completely Drained of Oil 1...
Page 4: ... section of the valve APCO CAC 8000 Automatic Control Check Valves save power costs due to the smooth flow area and valuable space in the Pump House due to their multi purpose functions Handling Lifting the valve improperly may damage it Do not fasten lifting devices to the actuator disc or through the seat opening in the body Lift the valve with slings chains or cables fastened around the valve b...
Page 5: ...ing 83 Wormwheel Cover Bolt 9 Disc Ring Seal 28 Disc Position Indicator 48 Top Cover Plate 84 Operator Mounting Bolt 10 Disc 29 Disc Position Indicator Set Screw 49 Operator Key 85 Gear Housing Top Cover Bolt 11 Disc Ring 30 Wormwheel Cover 50 Pinion Shaft Bottom Bushing 86 Wormshaft Cover Bolt 12 Disc Ring Retaining Screw 31 Gear Segment Key 51 Pinion Shaft 87 Gear Housing Retaining Bolt 13 Pivot...
Page 6: ...and water hammer The dashpot has three adjustable controlling stages 1 The primary control is the Timing Valve 96 2 The secondary control is the Flow Control Valve No 64 Fig 2 3 The third controlling stage is located in the cylinder and provides additional control over the last 10 of disc travel The top Flow Control Valve controls rate of opening while the bottom one controls rate of closing The d...
Page 7: ... Control Valve in the reverse direction as in Figure 4 This is attainable by positioning the wormwheel in the desired position as in Figure 3 the disc is free to move from set position to fully closed therefore still able to perform as a check valve However when set to function as a back flow control valve as in Figure 4 the disc is free to move from the set position to full open Figure 3 Normal F...
Page 8: ...the segment gear and disc in the closed position and the disc cannot move regardless of pressure or any changes in pressure on either side of the disc The factor of pressure tightness as noted on the normal flow side of the disc in Figure 5 150 psi is in reality a pressure differential factor In other words if the pressure in the reverse flow direction against the disc is 100 psi a pressure of 250...
Page 9: ...DeZURIK APCO CAC 8000 Automatic Control Check Valve December 2012 Page 9 D12000 Figure 5 Shut off Function Drain Valve Function See Flow Control Throttling Function Figure 4 ...
Page 10: ... Operation of Internal Cushion 4 Set Timing Valve Cam 94 so that the arrow on Cam is pointing to the center line of the Timing Valve Roller while the disc is in the closed position See Timing Valve Operation 5 Manually or electrically turn the Slip Gear Operator to set the Disc Position Indicator in the check position See All Telling Indicator 6 Pressurize Hydro pneumatic Tank to 15 psi for first ...
Page 11: ...re pump Oil Filling Procedure dashpot piping completely drained of oil Follow steps 1 thru 5 above 6 Loosen the 4 dashpot retaining bolts 88 to allow the cylinder to be lifted approximately 3 8 from its mounting 7 Manually lift dashpot cylinder or with the use of a tire pump pressurize the Hydro pneumatic tank until the piston bottoms to the rod end of the cylinder The cylinder head should move ap...
Page 12: ...nient means to automatically open or close the oil passage The built in roller is activated by the Timing Valve Cam causing a resultant movement of the Timing Valve stem to open or close the oil passage The Timing Valve is closed when the roller is fully extended and it is open when the roller is depressed as illustrated in Figure 6 Figure 6 Timing Valve ...
Page 13: ...llows the valve to operate as a check valve within this gap Operating as a check valve the dashpot cylinder system fully controls disc movement during either the opening or closing cycle The dashpot cylinder system has 3 control stages 1 Primary Control Timing Valve 96 controls the first stage of disc travel 2 Secondary Control Flow Control Valve 64 controls the second stage 3 Third Control Built ...
Page 14: ...DeZURIK APCO CAC 8000 Automatic Control Check Valve D12000 Page 14 December 2012 Figure 7 Slip Gear Illustration Figure 8 All Telling Indicator ...
Page 15: ...ars the end of its stroke In Figure 10 As the Cushion Plunger 1 enters cushion cavity 2 the exhaust fluid is almost completely trapped by the Ball Check 3 and the Adjusting Screw 4 creating a back pressure against Piston Assembly The back pressure cushions and slows the final part of the piston stroke thus reducing the high impact hammering of the Piston Assembly against the cylinder cap Turning t...
Page 16: ...DeZURIK APCO CAC 8000 Automatic Control Check Valve D12000 Page 16 December 2012 Operation of Internal Cushions Continued Figure 10 Cushion IN Figure 11 Cushion Out ...
Page 17: ...ontrary contained in the purchase order or represented by any agent or employee of DeZURIK Inc in writing or otherwise notwithstanding including but not limited to implied warranties Metric fasteners should not be used with ASME Class 150 300 bolt holes and flange bolt patterns If you use metric fasteners with ASME Class 150 300 bolt holes and flange bolt patterns it may lead to product failure in...
