DeZurik APCO SRG-6500 Instruction Manual Download Page 2

DeZURIK 

Instruction and Operating Manual 

Page 2 

© 2022 DeZURIK, Inc. 

 

Instructions 

These instructions are for use by personnel who are responsible for the installation, operation and 
maintenance of DeZURIK valves, actuators or accessories. 

Safety Messages 

All safety messages in the instructions are identified by a general warning sign and the signal word CAUTION, 
WARNING or DANGER. These messages indicate procedures to avoid injury or death. 

Safety label(s) on the product indicate hazards that can cause injury or death. If a safety label becomes difficult 
to see or read, or if a label has been removed, please contact DeZURIK for replacement label(s). 

 

 

Personnel involved in the installation or maintenance of valves should be constantly alert to potential 
emission of pipeline material and take appropriate safety precautions. Always wear suitable protection 
when dealing with hazardous pipeline materials. Handle valves which have been removed from service 
with suitable protection for any potential pipeline material in the valve. 

 

Inspection 

Your DeZURIK product has been packaged to provide protection 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 the following information: 

If the valve has a data plate: 

please include the 7-digit part number with either 4-digit revision number 

(example: 9999999R000) or 8-digit serial number (example: S1900001) whichever is applicable. The 
data plate will be attached to the valve assembly. Also, include the part name, the assembly drawing 
number, the balloon number and the quantity stated on the assembly drawing. 

If there isn't any data plate visible on the valve:

 please include valve model number, part name, and 

item number from the assembly drawing. You may contact your local DeZURIK Representative to help 
you identify your valve. 

DeZURIK Service 

DeZURIK service personnel are available to maintain and repair all DeZURIK products. DeZURIK also offers 
customized training programs and consultation services. For more information, contact your local DeZURIK 
sales representative or visit our website at DeZURIK.com. 

 

Summary of Contents for APCO SRG-6500

Page 1: ...APCO SRG 6500 SURGE RELIEF GLOBE VALVES Instruction D12020 December 2012 ...

Page 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...

Page 3: ...escription 4 Handling and Storage 4 Installation 4 Fusion Powder Coated Valves 5 Maintenance 5 Disassembly 5 Assembly 6 Disc Seat Replacement 7 Operation 7 Start up Procedure 7 Oil Filling Procedure 8 Adjustment of Flow Control Valve 8 Operation of Internal Cushion 8 Drawings 9 Troubleshooting 10 ...

Page 4: ... Surge Relief valves are delivered to the jobsite factory adjusted and ready for installation It should always be installed with the replaceable resilient seat of the disc facing the system pressure The valve outlet must be piped to discharge into the wet well or into a spillway Valve may be installed in a horizontal or vertical position with the flow upward In either case counterweight arm 44 sho...

Page 5: ...ore servicing the valve 1 Relieve the pressure in the pipeline 2 If it is necessary to remove valve from pipeline set valve standing on its inlet flange 3 Support counterweight 29 then unscrew counterweight set screw 36 and remove counterweight assembly 44 4 Loosen nut 56 holding counterweight arm assembly to pivot shaft 13 and remove counterweight arm assembly 5 Disconnect the pin between cushion...

Page 6: ...ar 9 Insert pivot shaft key 33 in keyway on pivot shaft 13 10 Install pivot shaft 13 from right side of body 1 through disc arm 9 until pivot shaft collar is flush with body 11 Insert pivot shaft straight bushing 11 into the body 1 at the other end 12 Insert pivot shaft seal 17 and pivot shaft cover seal 18 in their respective grooves 13 Insert pivot shaft seal retainer 37 on pivot shaft cover and...

Page 7: ... chamber from the oil reservoir through the flow control valve 59 The amount that disc will open depends on the surge pressure and velocity of the media flowing through the valve When surge pressure has been relieved and pressure in the system drops to normal the disc will close The speed at which the disc returns to the closed position is controlled by adjusting the flow control valve Opening the...

Page 8: ...al Cushion As illustrated below the cushioning of a pneumatic hydraulic cylinder stroke is obtained by trapping the exhaust air oil as the piston assembly nears the end of its stroke In Figure 2 as the Cushion Plunger 1 enters Cushion Cavity 2 the exhaust air oil is almost completely trapped by the Ball Check 3 and the Adjusting Screw 4 creating a back pressure against Piston Assembly The back pre...

Page 9: ...nder Bracket Mounting Screw 23 Eye Bracket Lock Washer 24 Cylinder Bracket 25 Eye Bracket Mounting Screw 26 Eye Bracket Nut 27 Cushion Lever 29 Counter Weight 30 Piping Detail 31 Seat Retaining Ring 32 Seat Retaining Ring Screw 33 Pivot Shaft Key 36 Counter Weight Arm Set Screw 37 Pivot Shaft Seal Retainer 39 Disc Stop Lock Nut 40 Seat Retaining Set Screw 41 Disc Pin Retaining Ring 42 Cover Pipe P...

Page 10: ...lve to remove object Disc seat is worn or damaged Replace disc seat Valve leaks at flange joint Loose flange bolting Tighten flange bolting Blown flange gasket Replace flange gasket Miss alignment or damage to field piping and supports Adjust miss alignment or repair piping or supports Damaged flange face s or improper flange connections Repair flange replace valve body or adjust flange connection...

Page 11: ...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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