Graco Pneumatic/Electric Lube Sentry Valve User's Manual
Contents
1. changes mode flow condition within two minutes and remains in this mode as long as normal oil flow continues For positive shutdown indication on the Electric Lube Sentry an ohmmeter or continuity meter should be connected to wiring as follows No flow condition continuity between red and white wires Flow condition continuity between red and blue wires Caution In an explosive atmosphere use only approved device for checking continuity This is the minimum shutdown time attainable for the application The shutdown time can be increased by continuing to turn the adjustment screw clockwise Caution Do not adjust shutdown time greater than shown on graphs or inconsistent shutdown time will result Pneumatic Lube Sentry Valve Installation Pneumatic Connections A Series Type in line Safety Control Pneumatic Circuits See Figure 3 1 Trace pneumatic safety circuits from the source of its take off air supply through the various safety devices used on the engine and compressor to the entrance of the pilot air port bonnet port on the safety control valve or gas shut off valve Select the most convenient location to break into the air circuit either between two other safety devices or between the last safety device and the bonnet port of the safety control valve MINIMUM RECOMMENDED VISCOSITY OIL 4 MINIMUM RECOMMENDED FLOW RATE e MINI 3 4 mum FlowR card ATE z a 278g uz a 1 OIL VISCOSITY S2. clockwise increases shutdown time A counterclockwise adjustment decreases the shutdown time Note 1 Pneumatic Valve Operation During Lubricant Flow ELECTRIC LUBE SENTRY VALVE 114 18 N P S F LUBE OUTLET 1 8 27 N P S F LOE LUBE INLET 1 8 27 N P S F 9 32 7 14 MTG HOLES g SHUTDOWN ADJUSTMENT LOCKWISE COUNTERCLOCKWISE INCREASE SHUTDOWN TIME DECREASE SHUTDOWN TIME Operation Port A Port B Port C Norm Open Air In Plugged Air Out Norm Closed Air Out Air In Plugged Figure 1 Pneumatic Lube Sentry Valve 9 32 1 4 18 N P S F 7 14 MTG LUBE OUTLET HOLES G i fio zh 7 o 1 2 N P T CONDUIT CONN DULY 1 4 18 N P S F LUBE INLET d 3 0 OF 18 AWG WIRE SHUTDOWN ADJUSTMENT CLOCKWISE INCREASE SHUTDOWN TIME COUNTERCLOCKWISE DECREASE SHUTDOWN TIME Flow Green Light ON Red Light OFF No Flow Red Light ON Green Light OFF LUBE OUT _ _ Sof Key n POWER P N C BLUE 5 STATUS DURING N O WHITE LUBE FLOW CONDITION COM RED ji IN Note 2 FLOW CONDITION For Closed Contact Use Red and Blue Wires Red Common For Open Contact Use Red and White Wires Re
3. lubricant flowing Lube Sentry should be in shutdown or warning position switch actuated You should show continuity between red and white wires if not the microswitch is misadjusted or broken 2 If adjustment is required remove the electrical connection Page 3 45425 housing consisting of conduit elbow and cap nipple and adaptor by loosening and removing the adaptor Figure 7 Item 31 from the switch housing 3 Loosen setscrew Item 26 located on bottom of switch body 4 Actuating piston must be completely extended Item 15 5 Rotate switch enclosure screw Item 23 clockwise until switch just actuates Continuity is obtained between red and white wires Rotate additonal 1 4 turn after switch actuates 6 Tighten setscrew Item 26 to lock nylon ball Item 25 against switch enclosure screw 7 If microswitch is defective replace 8 Re adjust switch PNEUMATIC LUBE PRESSURE VALVE SENTRY EXHAUST LUBE ouT aa A CB ATA TEMPERATURE LUBE IN VALVE ACCUMULATOR EXHAUST ADJUSTABLE A SAFETY CONTROL ORIFICE TS VALVE i AIR SUPPLY TO FUEL VALVE EXHAUST Figure 3 Typical Series Installation of Pneumatic Engine Shutdown Circuit TO NEXT RELAY CENTRAL Luse ___ EXHAUST R SIR our 4 EXHAUST i _ suPPLy A PNEUMATI
4. C c B LUBE O SENTRY tuse INDICATOR IN n RELAY PLUGGED Figure 4 Typical Installation with Pneumatic Indicating Relay WATER JACKET FULTON SYLPHON NO 530 LUBE OIL AIR VENT PNEUMATIC TO BEARINGS PILOT VALVE INTERNAL CIRCULATING ee COMBINATION REDUCING OIL PUMP VALVE AND PRESSURE RELIEF AIR AIR VENT lt SUPPLY ORIFICE SYLPHON RUBE 4 NO 9 9448 A1 OUT OR EQUIVALENT GAS hextausr 1 32 INCH DIA ENGINE FUEL FUEL a alve L c8 N PNEUMATIC SUPPLY i LUBE SENTRY ja y PLUGGED aa e hue NOTE Installation of the Pneumatic Lube Sentry as shown on the drawing provides automatic signalling of cylinder lubrication trouble No flow caused by pump failure broken line or low oil supply will cause the Lube Sentry to operate removing air pressure from the fuel valve and stopping the engine Figure 5 Typical Parallel Gas Engine Installation of Lubriquip Pneumatic Lube Sentry with Fulton Sylphon No 530 Pneumatic Pilot Valve Ordering Information Figure 7 Switch Assembly for Electric Lube Sentry Description Part No Old Part No Item Description Part No Old Part No Qty Pneumatic Lube Sentry Complete 563506 527 100 190 22 Sw
5. Pneumatic Electric Lube Sentry Valve PNEUMATIC LUBE SENTRY VALVE OPERATION Initiate lubricant flow from the lube pump serving the divider valve or pump to point system until flow has been established the electric or pneumatic circuit to the Lube Sentry must be bypassed Lubricant passing through the hydraulic section of the valve See Figure 1 or 2 from port 1 to port 2 moves to piston 3 in the direction of the arrow The actuator rod 4 is attached to piston 3 and simultaneously moves in the same direction allowing the directional spool 5 in the air valve of the Pneumatic Lube Sentry See Figure 1 to permit air to flow between port A and port C or tripping the microswitch es See Figure 2 Note 2 on the Electric Lube Sentry The Lube Sentry is now in a flow position When lubricant flow stops spring 6 returns piston 3 in the opposite direction closing the porting to the lube outlet 7 The lubricant ahead of piston 3 is forced back through the adjustable needle valve 8 at a controlled rate As piston 3 returns to the right the attached actuator rod 4 moves the Pneumatic Lube Sentry directional spool 5 permitting air to now flow between port A and port B See Figure 1 or changing the position of the microswitch es See Figure 2 Note 2 on the Electric Lube Sentry The Lube Sentry is now in a no flow condition Figure 1 shows a typical no flow position Adjusting needle valve 8
6. US T T T 1 500 1000 2000 3000 5000 NOTE Do not use below minimum recommended flow rates or inconsistent shutdown times occur Graph 1 Minimum Flow Rate Greater than shown will result in inconsistent shutdown time NOTE ALL FIGURES ARE 10 180 4 MAXIMUM SHUTDOWN TIME AT FLOW RATE OF 2x MINIMUM amp HIGHER 160 4 SEE GRAPH 1 140 4 120 4 ADJUSTABLE RANGE 100 4 804 604 SHUTDOWN TIME SECONDS 40 204 OIL VISCOSITY SUS T T T T 1 500 1000 2000 3000 5000 NOTE At minimum flow rate the shutdown time is not adjustable Times indicated are approximate results when the attached procedure is followed Attempting to increase the shutdown time will result in inconsistent shutdown time Graph 2 Minimum Shutdown Time 3 Break the air circuit at the selected point and tube the Lube Sentry Valve into the circuit with air flow entering port A and leaving port C See Figure 1 If gas is used as the control medium rather than air tube the exhaust port B into a suitable vent line CAUTION Never plug port in series type shutdown circuits 4 To test device for operation start engine to initiate flow in the divider valve system Operation of the air valve within the Lube Sentry will be observed as the tripping out of the reset latch manual override lever on the safety control valve see Figure 3 and the continued operation of the engine After a short inte
7. aintain pressure 2 The Lube Sentry should be teed in to the line serving the pilot port of the safety shutdown valve 3 Connect port B into the safety circuit 4 Plug port C 5 Port A exhaust may be connected to a vent line if necessary 6 To test device for operation see item 4 under Series Type Electric Lube Sentry Valve Installation Electric Switch Adjustment and Replacement The electrical end of the Lube Sentry has been adjusted correctly at the factory If the electric switch assembly is replaced repairs required or adjustment necessary proceed as follows Warning Never remove the Lube Sentry Electric Switch Assembly from the Actuator Assembly or make any adjustments to the Electric Switch without first being sure there is NO Electricity Present at the Lube Sentry To Replace Electric Switch Assembly 1 After determining there is no electricity to the Lube Sentry remove the switch assembly from the actuator assembly by removing the four socket head screws holding the two assemblies together being careful not to scratch the mating surfaces 2 Be sure no corrosion or dirt is present In a no flow condition the actuator rod should extend approx 5 32 inches beyond the actuator rod housing 3 Replace electric switch assembly Caution Do not reassemble if scratches dirt or corrosion are present on mating surfaces of switch and actuator assembly To Adjust Electric Switch Assembly 1 With no
8. d Common NO FLOW CONDITION For Open Contact Use Red and Blue Wires Red Common For Closed Contact Use Red and White Wires Red Common CAUTION If only two of the three wires are used tape un used wire Figure 2 Electric Lube Sentry Valve PROVEN QUALITY LEADING TECHNOLOGY Manzel Pneumatic Electric Lube Sentry Valve INSTALLATION General Lube Line Connection 1 The Lube Sentry Valve should be located in the lube line downstream of pump filters and controls but ahead of the master divider valve A high pressure line filter placed after the pump is insurance against system plugging due to oil born dirt A pressure rupture assembly Disk Relief Type must be located in the main lube line between the pump and the line filter Always install Lube Sentry with LUBE OUT port up to permit natural air purging of the device General Shutdown Reaction Adjustment 1 See graphs for minimum flow rates with various viscosity oils and shutdown time recommendations Start with the adjustment screw Figures 1 amp 2 Item 8 flush with end of housing Turn on lube system with pump discharging oil at normal flow rate and pressure Slowly rotate adjustment screw clockwise until the electric switch air valve changes mode flow condition Stop oil flow and note time for electric switch air valve to change mode no flow condition Start normal flow of oil and note that the electric switch air valve
9. itch Assembly Electric Lube Sentry 563504 527 100 170 1 Pneumatic Valve 563503 527 100 150 23 e Switch Enclosure Screw 557355 503 680 000 1 Actuator 563502 527 100 130 24 e Microswitch Assembly 557757 527 100 210 1 Electric Lube Sentry Complete 563505 527 100 180 25 e Nylon Ball 5 32 in 555781 504 706 000 1 Switch Assembly 563504 527 100 170 26 e Setscrew 10 32 x 3 8 in 556476 417 450 040 1 For more information on the Pneumatic or Electric Lube Sentry Valve consult Literature L15831 27 e Round Head Screw 555496 416 010 070 2 28 e Int Lockwasher 555631 421 070 010 2 Figure 6 Actuator Assembly 29 e Socket Head Srew 1 4 20 x 1 3 4 556510 419 130 090 4 item Description Part No Old Part No aty 30 e Switch Housing 561008 527 100 090 1 1 Lube Sentry Actuator Assembly 563502 527 100 130 1 Sey S Adapter 557858 508 681 000 4 2 Body Matched Fit 560999 527 100 000 1 32 e Conduit Elbow w Nipple 557384 507 912 000 1 3 Piston Matiched Fit 561000 527 100 010 1 Electric Switch Assembly Repair Kit 563908 560 001 120 1 4 e Valve Adjustment 561005 527 100 062 1 OP big e Housing Adjustment Screw 561004 527 100 052 1 6 O Ring Viton 70 Duro 556560 422 041 140 2 ig igs e O Ring Viton 70 Duro 556551 422 040 060 1 25 a 69 isane 8 e Back Up Ring 557719 527 000 760 2 a aT mo e O Ring 556554 422 040 110 1 ee 10 e Setscrew 1 4 20 x 1 4 Hex 555531 417 060 020 1 11 Ball 3 16 Steel 556328 401 030 030 1 Fig
10. rval of running during which the engine and compressor receive sufficient lubrication and all other safety devices move to the RUN position dump the output of the pumps serving the divider valve systems by removing the pump blowout disc or a pipe plug from the pump manifold assembly When the flow to the distribution system stops the Lube Sentry should operate to dump the pressure in the pneumatic safety circuit dropping out the safety control valve to stop the engine If shutdown action is sluggish reduce the setting of the adjustable orifice through which air for the safety Circuit passes Page 2 Manzel Pneumatic Electric Lube Sentry Valve The Lube Sentry is provided with a 1 8 air valve If the control orifice for the safety system is too large air will be supplied to the Lube Sentry too quickly to permit it to dump properly A pneumatic relay may be operated by the Lube Sentry see Figure 4 B Parallel Type Safety Control Pneumatic Circuits See Figure 5 1 Parallel type safety circuits rely on their devices to dump the pilot control pressure on the safety control valve in case of trouble This control pressure is supplied to the pilot bonnet port of the safety shutdown valve through an adjustable orifice which permits enough air to enter the circuit to maintain pressure on the port When any safety device operates the pilot pressure is dumped with the control orifice preventing sufficient air to enter the system to m
11. to 180 F 29 C to 82 C Max Pressure 6 000 psi 414 bar Max Air Pressure Pneu 125 psi 8 bar 1 Flow Rate per day 4 400 pints 1 89 189 2 liters Elecrical Rating 1 5 amps 125 250 VAC 2 A B or C 28 VDC Pressure Drop 250 psi 17 bar A Inductive 3 amp j B Resistive 5 amp Seal Vit Z n C Max Inrush 15 amp 1 Lubricant Oil 450 2 000 SUS 1 Lubricant i 1 Ref to Graph 1 Net Weight 5 Ib 2 265 kg All written and visual data contained in this document are based on the latest product information available at the time of publication Graco reserves the right to make changes at any time without notice Contact us today AN To receive product information or talk with a Graco representative call 800 533 9655 or visit us online at www graco com 2006 2009 Graco Inc Form No L45425 Rev B 7 09 Printed in U S A All other brand names or marks are used for identification purposes and are trademarks of their respective owners All written and GRACO visual data contained in this document are based on the latest product information available at the time of publication Graco reserves the right to make changes at any time without notice
12. ure 8 Valve Assembly for Pneumatic Lube Sentry 12 e Spring Piston Return 557753 527 100 110 1 Item Description Part No Old Part No Qty 13 e O Ring 556557 422 040 140 1 22 Valve Assembly Pneumatic Lube Senry 563503 527 100 150 1 14 e Spacer O Ring Retaining 561009 527 100 100 1 23 e O Ring 70 Duro 555690 422 041 200 1 15 e Piston Switch Actuating 561002 527 100 030 1 24 e O Ring 70 Duro 555685 422 040 220 1 16 e Locking Screw 3 8 24 x 3 16 556470 416 700 780 1 25 e Air Valve Spring 557353 503 658 000 1 w e Back Up Ring 556584 423 700 038 1 26 e Valve Cartridge 557354 503 659 000 1 18 e 0 Ring 556553 422 040 080 1 27 e Spring Guide 561011 527 100 320 1 19 e Screw Piston Enclosure 561003 527 100 040 1 28 e Socket Head Screw 1 4 20 x 1 3 4 556510 419 130 090 4 20 e Houseing 5 W Act Piston 561001 527 100 020 1 29 e Air Valve Housing 561006 527 100 070 1 Adjustment Screw amp Housing Only 564405 527 100 370 1 30 e Air Valve Enclosure Screw 561007 527 100 080 1 t Actuator Assembly Repair Kit 564436 560 001 130 1 Pneumatic Lube Sentry Repair Kit 563907 560 001 110 1 14I8NPSF REF m sae ESSET OS HOLE REF erce O a ot KONET a aes a 5 Su av 1 046 REF DIMPLED END OF AIR VALVE IN THIS POSITION 13 8 REF 118 27 N P S F AIR CONN TYP Specifications Material Steel Operating Temperature 20 F
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