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DeZURIK

 

 APCO CVS-EDV Swing Check Valves 

February 2016 

Page 17 

D12042 

Table 1 - Continued

 

 

Lever & Weight, Lever & Spring, and Cylinder Parts

 

Item 

Number 

Description 

B81 

Y-Connector Pin 

B82 

Y-Connector Pin Retaining Ring 

B83 

Spring Cylinder 

B84 

Spring Cylinder Mount Bolt 

B85 

Lever arm fabrication 16-30" 

B86 

Spring 16-30" 

B87 

Spring Lever Arm Ret. Screw 16-30" 

B88 

Cushion Lever 

 

 

Troubleshooting 

Condition 

Possible Cause 

Corrective Action 

Shaft seal leaks. 

Packing is loose. 

Tighten gland nuts only until the 
leak stops. 

Packing is worn. 

Replace Packing. 

Valve leaks excessively from 
one side of the disc to the other. 

Foreign matter caught between 
disc and seat. 

Fully open valve to remove 
object. 

Disc seat is worn or damaged. 

Repair disc seat or replace 
valve. 

Valve leaks at flange joint. 

Loose flange bolting. 

Tighten flange bolting. 

Blown flange gasket. 

Replace flange gasket. 

Misalignment or damage to field 
piping and supports. 

Adjust misalignment or repair 
piping or supports. 

Damaged  flange face/s or 
improper flange connections. 

Repair flange, replace valve 
body or adjust flange 
connections. 

Valve does not fully close. 

Object is wedged between seat 
and disc. 

Fully open valve to remove 
object. 

Packing Gland is too tight 

Loosen packing gland fasteners.  
Packing may need to be 
replaced if leakage occurs. 

 

Содержание APCO CVS-EDV

Страница 1: ...DeZURIK Inc Sartell Minnesota USA Phone 320 259 2000 www dezurik com info dezurik com APCO CVS EDV SWING CHECK VALVES Instruction D12042 February 2016 ...

Страница 2: ...ion during shipment however items can be damaged in transport Carefully inspect the unit for damage upon arrival and file a claim with the carrier if damage is apparent Parts Replaceable wear parts are listed on the assembly drawing These parts can be stocked to minimize downtime Order parts from your local DeZURIK sales representative or directly from DeZURIK When ordering parts please provide th...

Страница 3: ...pring Assembly to Opposite Side of Valve 7 Adding Air Cushion Assembly to Valve 8 Operation 9 Closure Speed Control Adjustment Valves with Lever Weight 9 Closure Speed Control Adjustment Valves with Air Cushion 9 Start up Procedure 9 Adjustment Valves with Air Cushion with Lever Weight 10 Adjustment Valves with Lever Weight 10 Drawings 11 CVS EDV Swing Check Valve 11 Lever Weight 12 Air Cushion 13...

Страница 4: ...e storage is unavoidable make sure a vermin proof rain cover water shedding tarp etc is secured around over the equipment to keep off rain and mud Skid and set the assembly on a flat solid and well drained surface for protection from ground moisture runoff and pooled rain water Installation The APCO CVS EDV Swing Check Valve may be installed in a horizontal or vertical position with the flow upwar...

Страница 5: ...tenance It is suggested that these valves which do not require routine scheduled maintenance be included as part of the normal facility equipment inspections for any malfunction while under normal usage conditions Shaft Packing Adjustment Packing adjustment may be needed to optimize packing life on initial start up These valves may open or close swinging the counterweight spring lever arm without ...

Страница 6: ... from the parts list Cut the packing rings to fit around the shaft Install one ring at a time Make sure it is clean and has not picked up any dirt in handling before installing it Lubricate I D of each packing ring Each ring should be firmly seated with a tamping tool Do not depend on the packing gland entirely to seat the set of rings properly This practice will jam the last rings installed but l...

Страница 7: ... 5 Loosen and remove Cover Nuts A28 and Cover Nut Washers A29 Remove Cover A2 6 Loosen and remove Limit Screw A11 7 From the extended shaft side of the valve loosen and remove Gland Nuts A26 remove the Gland A25 V Type Packing set A23 and Filler Ring A21 from the Body A1 Repeat process on side opposite extended shaft 8 Remove the Shaft A13 along with Key A8 from the Body A1 9 Flip and insert Shaft...

Страница 8: ...or Spring Cylinder Mount Bolts B84 On size 3 14 hook ends of Spring B34 thru Eye Bolt B35 and Lever Arm Fabrication 3 14 B33 16 Position Counterweight Lever Arm Washer B56 at end of Shaft A13 Insert Lever Arm to Shaft Set Screw B57 and tighten Adding Air Cushion Assembly to Valve Servicing the valve while the pipeline is under pressure can cause personal injury or equipment damage Relieve pipeline...

Страница 9: ...nstallation For 3 14 valves equipped with a lever spring the stored energy in the extended spring B34 causes the Disc A10 to close in addition to weight of the disc For 16 30 valves equipped with a lever spring the stored energy in the compressed spring B86 causes the Disc A10 to close in addition to weight of the disc System static pressure downstream of the swing check valve keeps the Disc A10 a...

Страница 10: ...ds end of lever a couple of inches Repeat start and stop Slam still persists Continue repeating above steps until satisfactory closing is achieved Then increase opening discharge isolation valve to open Repeat start and stop pump sequence and above steps until isolation valve is full open Lock Flow Control Valve when finished Adjustment Valves with Lever Weight Condition Adjustment Check valve sla...

Страница 11: ...DeZURIK APCO CVS EDV Swing Check Valves February 2016 Page 11 D12042 Drawings Figure 3 APCO CVS EDV Swing Check Valve ...

Страница 12: ...DeZURIK APCO CVS EDV Swing Check Valves D12042 Page 12 February 2016 Drawings Continued Figure 4 CVS EDV Swing Check Valve Lever Weight ...

Страница 13: ...DeZURIK APCO CVS EDV Swing Check Valves February 2016 Page 13 D12042 Drawings Continued Figure 5 CVS EDV Swing Check Valve Air Cushion ...

Страница 14: ...DeZURIK APCO CVS EDV Swing Check Valves D12042 Page 14 February 2016 Drawings Continued Figure 6 CVS EDV Swing Check Valve Lever Spring 3 14 ...

Страница 15: ...DeZURIK APCO CVS EDV Swing Check Valves February 2016 Page 15 D12042 Drawings Continued Figure 7 CVS EDV Swing Check Valve Lever Spring 16 30 ...

Страница 16: ...ever Arm Fabrication A17 Disc Seat Screw B55 Lever Weight Assy Set Screw A18 Disc Stem B56 Lever Arm Washer A19 Disc Nut B57 Lever Arm To Shaft Set Screw A20 Disc Washer B58 Lever Arm Set Screw Nut A21 Filler Ring B59 Counterweight Arm A23 V Type Packing B60 Counterweight A25 Gland B61 Cushion Lever Clevis Pin A26 Gland Nut B62 Cushion Lever Clevis Pin Retaining Ring A27 Gland Stud B63 Y Connector...

Страница 17: ...lve leaks excessively from one side of the disc to the other Foreign matter caught between disc and seat Fully open valve to remove object Disc seat is worn or damaged Repair disc seat or replace valve Valve leaks at flange joint Loose flange bolting Tighten flange bolting Blown flange gasket Replace flange gasket Misalignment or damage to field piping and supports Adjust misalignment or repair pi...

Страница 18: ...ll be the only effective guarantee or warranty binding on Seller despite anything to the contrary contained in the purchase order or represented by any agent or employee of Seller in writing or otherwise notwithstanding including but not limited to implied warranties THE FOREGOING REPAIR AND REPLACEMENT LIMITED WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES OBLIGATIONS AND LIABILITIES INCLUDING ALL W...

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