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DeZURIK 20.5–36" PEC
ECCENTRIC VALVES

Instruction

D10032

April 2015

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Содержание PEC

Страница 1: ...DeZURIK 20 5 36 PEC ECCENTRIC VALVES Instruction D10032 April 2015 ...

Страница 2: ...azardous pipeline materials Handle valves which have been removed from service with suitable protection for any potential pipeline material in the valve Inspection Your PEC Eccentric 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 Parts Rec...

Страница 3: ...owder Coated Valves 5 Closed Position 6 Lubrication Packing 6 Plug Journals and Lubrication 7 Packing Adjustment 8 Replacing Packing with Actuator Removed 8 Replacing Packing Without Removing Actuator 9 Disassembly 10 Reassembly 11 Removing Valve from Pipeline 12 Field Test 12 Emergency Operation 12 Predicted Wear of Parts 12 Troubleshooting 13 ...

Страница 4: ... valve improperly may damage it Do not fasten lifting devices to the actuator plug or through the seat opening in the body Lift the valve with slings chains or cables fastened around the valve body or fastened to bolts or rods through bolt holes in the flanges Required Tools This valve is assembled using only SAE fasteners To service this valve you should have a full set of combination wrenches Al...

Страница 5: ...s 3 Tighten the flange bolts or studs in a crisscross pattern 4 Ensure the valve and flanges are concentric to ensure proper flange sealing Fusion Powder Coated Valves Valves with fusion powder coated exterior paint require flat washers to be installed under the flange nuts when installing the valve to the pipeline flange to prevent the paint from cracking or chipping NOTE In the case of limited s...

Страница 6: ...que is the amount required to seat the plug for a given pressure drop across the valve To avoid excessive plug and seat wear caused by over torquing use the actual pressure drop across the valve when determining correct closing torque 5 After the valve has been closed using the correct amount of torque set the actuator closed position stop to limit actuator travel at this position Lubrication This...

Страница 7: ...alternate Mobilgrease FM 101 alternate Petro Canada Purity FG 2 alternate Phillips Philube PF alternate ALL VALVES EXCEPT CAST IRON DUCTILE IRON and NI RESIST Coat the journals on the plug with a light coat using one of these lubricants Dow Corning Molykote G Rapid paste recommended Shell Retinax AM alternate Shell Lithall MDS alternate Then lubricate with a mixture of powdered graphite and one of...

Страница 8: ...l operation of power actuator can cause personal injury or equipment damage Disconnect and lock out power to actuator before servicing 3 If the actuator is powered disconnect and lock out the pneumatic hydraulic or electrical power to prevent accidental operation of the actuator When an eccentric valve is mounted in a vertical pipeline or mounted in a horizontal pipeline with the plug stem horizon...

Страница 9: ...ent it will be necessary to adjust the packing gland nuts after the valve is pressurized See Packing Adjustment section 11 Install the actuator as described in the Actuator Instructions 12 If the actuator is a powered actuator reconnect power to the actuator Replacing Packing Without Removing Actuator 1 This process can be done with or without pressure in the pipeline Caustic toxic or hot material...

Страница 10: ...more turn 11 Restore the pipeline pressure if it was relieved and check for packing leakage If leakage occurs tighten each packing nut just enough to stop the leakage Excessive tightening will cause reduced packing life and higher valve operating torque Disassembly This valve is a pressure vessel The bonnet will blow off the body if the bonnet bolts are removed with pressure in the valve Pressure ...

Страница 11: ... into the valve body then lubricate the bearing See Lubrication section 2 Replace the journal cover on lower bearings and tighten screws 3 Place the plug into the valve body so the lower journal slides into the bushing 4 Turn the plug so it is nearly closed 5 Set a new gasket in the body 6 Push a new bearing into the bonnet then lubricate the bearing See Lubrication section 7 Align the scribe mark...

Страница 12: ... actuator can cause personal injury or equipment damage Disconnect and lock out power to actuator before servicing 3 If the actuator is powered disconnect and lock out the pneumatic hydraulic or electrical power to prevent accidental operation of the actuator 4 Support the valve assembly then remove the flange bolts 5 Remove the valve from the pipeline Field Test Stroke the valve between the fully...

Страница 13: ... Valve does not close Object is wedged between plug and seat Completely open the valve to flush object from the valve If flushing does not work remove valve from the pipeline and remove object See Removing Valve from Pipeline section Actuator closed position is out of adjustment Adjust the closed position stop See Actuator Instructions Valve leaks when closed Plug is worn or damaged Replace plug S...

Страница 14: ...antee shall be null and void if after shipment from our factory the item is modified in any way or a component of another manufacturer such as but not limited to an actuator is attached to the item by anyone other than DeZURIK Inc Factory Service personnel All orders accepted shall be deemed accepted subject to this limited warranty which shall be exclusive of any other or previous Warranty and th...

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