VICTOR SGS 500 Series Stainless Steel Regulators Troubleshooting instruction

PARTS & SERVICE BULLETIN
SGS 500 Series
Stainless Steel Regulators
FORM NO. 0056-1316 EFFECTIVE December 1996
VICTOR High Purity regulators were helium leak tested at the factory to an inboard rate of 1 x 10
-9
scc/sec. Always leak test with helium after servicing the regulators. DO NOT ser­vice the regulators if you do not have access to helium leak testing facilities. Take the regulators to a qualified repair technician with helium leak testing equipment.
Apparatus improperly operated, maintained or repaired can be dangerous. Some parts and accessories manufactured by others may fit VICTOR apparatus but not conform to VICTOR’s exacting standards. For your own protection, specify and use ONLY VICTOR­made parts and accessories with your VICTOR apparatus.
Service or repair of VICTOR apparatus should be performed only by a qualified techni­cian. Improper service, repair or modification of the the product could result in damage to the product or injury to the operator.
2
CHART 1
SGS 500-15
0761-0109 1424-0312 1424-0311
SGS 500-40
0761-0110 1424-0313 1424-0311
SGS 500-80
0761-0111 1424-0314 1424-0311
SGS 500-125
0761-0112 1424-0315 1424-0311
CHART 2
CGA NO.
240 330 350 540 580 590 660 705
INLET SWIVEL
0998-0003 0985-0006 0983-0014 0967-0022 0970-0051 0970-0051 0995-0017 0998-0011
INLET NUT
0998-0006 0986-0007 0983-0013 0967-0052 0973-0004 0974-0010 0995-0007 0998-0012
INLET WASHER
1408-0018 1408-0023
N/A N/A N/A
N/A 1408-0024 1408-0032
ITEM NO.
NO. DESCRIPTION PART NO. REQ’D
1 HOLE PLUG 0919-0028 1 2 ADJUSTING KNOB 0750-0111 1 3 LOCKNUT 1409-0079 1 4 LOCKWASHER 1406-0110 2 5 ADJ. SCREW ASSY. 0750-0143 1 6 HOUSING CAP 0720-0221 1 7 ADJUSTING SPRING See Chart 1 1 8
9 DIAPHRAGM PLATE 0735-0047 1 10 DIAPHRAGM 0731-0021 1 11 CARTRIDGE ASSY. 0739-0024 1 12 BODY 0701-0233 1 13 CARTRIDGE GASKET 1408-0114 1 14 15 16 17 L.P. GAUGE See Chart 1 1 18 H.P. GAUGE See Chart 1 1 19 DIFF. RES. VALVE 0660-0519 1 20 BUSHING 0910-0081 1 21 INLET SWIVEL See Chart 2 1 22 INLET NUT See Chart 2 1 23 WASHER See Chart 2 1 24 PIPE PLUG 1105-0021 1
ITEM NO.
NO. DESCRIPTION PART NO. REQ’D
A BODY 0658-0011 1 B POPPET GUIDE 0783-0014 1 C SPRING 0762-0040 1 D SEAT ASSEMBLY 0740-0142 1 E DIAPHRAGM (copper) 0731-0053 1 F DIAPHRAGM (SST) 0731-0054 2 G NOSE, ADJ.SCREW 0751-0088 1 H ADJUSTING SCREW 0667-0039 1 J CAP 0659-0004 1 K GASKET 1408-0100 1 L LOCK NUT 1409-0003 2 M LOCKWASHER 1406-0110 1 N ADJUSTING KNOB 0750-0107 1 P HOLE PLUG 0919-0028 1
SGS 500 REGULATOR
DRK VALVE
SGS 500-200
0761-0113 1424-0316 1424-0311
Description
Adjusting Spring L. P. Gauge H. P. Gauge
SERVICE PROCEDURES
Recommended Tools and Supplies:
Bench Vise Inlet Swivel Ass’y Plug RT-2 (CGA 350) (1420-0009) Inlet Swivel Ass’y Plug RT-4 (CGA 540) (1420-0014) Inlet Swivel Ass’y Plug RT-85 (CGA 580) (1420-0134) Inlet Swivel Ass’y Plug RT-86 (CGA 590) (1420-0135) 9/16” Open-End Wrench 5/8”, 1
3
/
16
” and 1
7
/
8
” Hex Sockets
Torque Wrench Lubricant (0034-0020) TEFLON® Tape (0028-0028)
For additional information, refer to Apparatus Service and Testing Procedures (Form No.0056-0886) and Repair Tools Manual (Form No. 0056-0121).
Disassembly Procedure
1. Secure the Holding Fixture in the Bench Vise. Place the Regulator in the Holding Fixture with the Gauges face up.
2. Remove the Nameplate from the Adjusting Knob.
3. Remove the Adjusting Knob from the Regulator. Remove the Housing Cap.
4. Remove the Spring Button, Adjusting Spring, Slip Ring and Diaphragm from the Body. Discard the Slip Ring.
5. Remove the Cartridge and Cartridge Gasket from the Body. Discard the Cartridge Gasket.
6. Remove the Gauges from the Body.
DO NOT attempt to repair the Gauges.
7. Remove the Relief Valve or Pipe Plug from the Body.
8. While holding the Bushing, remove the DRK Valve from the Bushing.
If the DRK Valve requires repair, refer to the
DRK Valve Parts and Service Bulletin (Form No. 0056-1083).
9. Remove the Bushing from the Body.
10. Clamp the appropriate Inlet Swivel Assembly Plug in the Bench Vise. Attach the Regulator to it.
11. Remove the Inlet Swivel from the Body. DO NOT damage the Inlet Swivel seating surfaces. Remove the Inlet Nut from the Inlet Swivel.
12. Remove the Filter from the Inlet Swivel. Discard the Filter.
Discard the Slip Ring, Cartridge Gasket and
Filter. Replace them each time you reassemble a Regulator.
Cleaning Regulator Parts
Clean all metal parts with a cleaner that is safe for use with oxygen. Contact a chemical/cleaning supply distributor for recommended clean­ers for use with oxygen. Always use cleaning solvents in accordance with the manufacturer’s instructions.
DO NOT allow nonmetal parts to come in contact with
any cleaning solvent! Cleaning solvents cause elastomeric and plastic parts to swell and stress crack. If these parts require cleaning, use a mild soap solution, followed by thorough rinsing in water. Dry these parts completely before installing in the Regulator. REPLACE NON­METAL PARTS THAT HAVE COME IN CONTACT WITH OIL, GREASE OR ANY OTHER PETROLEUM BASED SUBSTANCE!
Assembly Procedures
1. Install the Body in the Body Wrench.
2. Install a new Filter in the Inlet Swivel. Install the Inlet Nut on the Inlet Swivel.
3. Clamp the appropriate Inlet Swivel Assembly Plug in the Bench Vise. Screw the Inlet Nut onto the Plug and tighten firmly.
4. Wrap two or three layers of TEFLON® tape around the second and third threads of the Inlet Swivel. Install the Inlet Swivel in the Body. Tighten to a torque of 20-25 ft.lbs.
5. Wrap two or three layers of TEFLON® tape around the second and third threads on both ends of the Bushing. Install the Bushing in the Body. Tighten to a torque of 14-18 ft.lbs.
6. Install the DRK Valve on the Bushing. Tighten to a torque of 10 ft.lbs. minimum.
7. Wrap two or three layers of TEFLON® tape around the second and third threads of the L.P. and H.P. Gauges. Install the Gauges in the Body. Tighten to a torque of 10 ft.lbs. minimum.
8. Wrap two or three layers of TEFLON® tape around the second and third threads of the Relief Valve or Pipe Plug. Install the Pipe Plug in the Body. Tighten to a torque of 14-18 ft.-lbs.
9. Remove the Regulator from the Body Wrench. Secure the Holding Fixture in the Bench Vise. Place the Body in the Holding Fixture with the Gauges face up.
10. Remove any contaminants that may otherwise cause the Regulator to malfunction by connecting the Regulator to a source of oil-free air. Slowly open and close the Manifold Valve two or three times. Blow out the inside of the Body with pressurized oil-free air.
Always wear eye protection when cleaning the
Regulator Body with pressurized air.
11. Place the new Cartridge Gasket in the Body.
12. Install the Cartridge in the Body. Tighten the Cartridge to a torque of 60 ft.lbs maximum.
13. Place the new Diaphragm and new Slip Ring on the Body.
14. Place the Adjusting Spring over the Diaphragm.
15. Apply a small amount of lubricant (0034-0020) to the O-ring around the Spring Button.
16. Carefully place the Housing Cap over the Adjusting Spring. Screw the Housing Cap onto the Body. Tighten the Housing Cap to a torque of 100 ft.lbs maximum.
Test Procedure
Recommended Tools and Supplies:
High Pressure Test Gun (quick-opening on/off valve) with
#70 (0.0280) Orifice
2000+/-100 PSIG Source of Oil-Free Air or Dry Nitrogen
(SGS 500)
Always perform the following test procedure after
assembling a Regulator. Test with oil-free air or dry nitrogen ONLY! Always wear eye protection when testing a Regulator. NEVER stand directly in front of or behind a Regulator when opening the Cylinder Valve or Test Manifold. Always stand so that the Cylinder Valve or Test Manifold is between you and the Regulator.
1. BEFORE attaching the Regulator to the oil-free air or dry nitro-
gen, slowly open and close the Cylinder Valve several times. This dislodges any particles which may otherwise enter the Regulator. Leave the Valve closed.
2. Connect the Regulator to the Test Cylinder or Manifold. Back out the Adjusting Screw until no pressure is on the Adjusting Spring.
3. Attach the Test Gun (with #70 orifice) to the Regulator or Valve Outlet. Open the DRK Valve, if applicable.
4. Adjust the Test Manifold to deliver 2000 PSIG of pressure.
5. Setting the Adjusting Screw:
a. Open the Test Manifold. b. Adjust the Adjusting Set Screw until the Regulator delivers the
appropriate pressure listed below:
15 Range - 30 PSIG Max. No Flow
15 PSIG Min. Flowing
40 Range - 60 PSIG Max. No Flow
40 PSIG Min. Flowing
3
80 Range - 100 PSIG Max. No Flow
80 PSIG Min. Flowing
125 Range - 200 PSIG Max. No Flow
125 PSIG Min. Flowing
200 Range - 400 PSIG Max. No Flow
200 PSIG Min. Flowing
c. Without moving the adjusting screw and with the test gun
turned off, run the lock nut in a clockwise direction until it is flush (not tight) against the gaskets above the packing nut. Make sure the lockwasher is placed on the adjusting screw between the stop nut and the knob. Slip the knob down onto the adjusting screw. Install the top lockwasher and nut loosely. Hold the knob position firmly with one hand and tighten the nut to 8-10 ft.lbs. of torque. Adjust the control knob in a coun­terclockwise (decrease) direction until the knob stops turning. Bleed pressure from the test gun. Readjust the regulator clock­wise (increase) to assure that the regulator is set to the desired rated pressure. If the setting is not correct, repeat Step C. After the setting is correct, snap the nameplate plug into the recess of the knob.
6. CREEP TEST/SLOW SHUT-OFF TEST:
a. Close the Test Gun. b. Adjust the Regulator to deliver the appropriate pressure listed
below:
15 Range - 5 PSIG 40 Range - 10 PSIG 80 Range - 10 PSIG 125 Range - 20 PSIG 200 Range - 20 PSIG
c. Observe the L.P. Gauge for five (5) minutes. During the first
two (2) minutes, slow shut-off (delivery rise due to the Seat closing slowly) should not exceed 2 PSIG. During the next three (3) minutes, no creep (0 PSIG) is allowed. Creep is indi­cated by an increase in the L.P. Gauge reading.
7. DROP TEST:
a. Close the Test Gun. b. Adjust the Regulator to deliver the appropriate pressure listed
below.
15 Range - 5 PSIG 40 Range - 10 PSIG 80 Range - 10 PSIG 125 Range - 20 PSIG 200 Range - 20 PSIG
c. Open the Test Gun. Observe the L.P. Gauge. Drop (difference
in delivery from no-flow to flow) should not exceed the appro­priate pressure listed below.
15 Range - 2 PSIG 40 Range - 3 PSIG 80 Range - 3 PSIG 125 Range - 4 PSIG 200 Range - 10 PSIG
8. LEAK TEST: a. Close the Test Gun. b. Adjust the Regulator to deliver the appropriate pressure listed
below.
15 Range - 15 PSIG 40 Range - 40 PSIG 80 Range - 80 PSIG 125 Range - 125 PSIG
200 Range - 200 PSIG c. Close the Test Manifold Valve. d. Turn the Adjusting Knob counterclockwise one turn. Observe
the Gauges for five (5) minutes. If the Gauge readings change, a leak exists. Disassemble the Regulator. Clean the compo­nents as described under Cleaning Regulator Parts. Replace any damaged parts. Reassemble and retest the Regulator.
9. Open the Test Gun to release pressure from the Regulator. Turn the Adjusting Knob counterclockwise until there is no pressure on the Adjusting Spring. Close the Valve.
10. Remove the Test Gun from the Regulator.
11. Remove the Regulator from the Test Manifold.
12. HELIUM LEAK TEST:
Helium leak test (mass spectrometer) these regulators to an inboard rate of 1 x 10
-9
scc/sec or better. If you do not have heli­um leak testing facilities, take the Regulator to a qualified repair technician with proper facilities.
If the Regulator does not perform properly during testing, refer to the Troubleshooting Chart in the Apparatus Service and Testing Procedures (Form No. 0056-0886).
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U.S. CUSTOMER SERVICE: P. O. Box 1007 • Denton, TX 76202-1007
800-426-1888 • FAX 800-535-0557
International Offices
®
Form No. 0056-1316 (6/00) © Victor Equipment Co., 1996 www.victorequip.com Printed in U.S.A.
WORLD HEADQUARTERS: 101 S. Hanley Road • St. Louis, MO 63105 • 314-721-5573 • FAX 314-746-2161
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