Related Manuals for Agilent Technologies 4890
Summary of Contents for Agilent Technologies 4890
- Page 1 Agilent 4890, 5890, 6890 Gas Chromatograph Rotary Valves Installation Guide Agilent Technologies...
- Page 2 Notices © Agilent Technologies, Inc. 2002 Safety Notices No part of this manual may be reproduced in any form or by any means (including elec- CAU TI O N tronic storage and retrieval or translation into a foreign language) without prior agree-...
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Page 3: Agilent Technologies
Installing Rotary Valves These instructions describe how to use the hardware kits to install a new valve in your Agilent Technologies’ 4890, 5890, or 6890 series Gas Chromatograph (GC). Table 1 Parts supplied Kit G2739A Kit G2740A Description (Liquid sample) -
Page 4: Part Identification
Installing Rotary Valves Part Identification Tubing Nut and ferrule set Screws Restrictor bracket Metering valve Figure 1 Kit G2739A, Liquid Sample Valve Tubing Actuator limiter Reducer/restrictor Screws Nut and ferrule set Filter union Nuts Column bulkhead fittings Figure 2 Kit G2740A, Gas Sample Valve Installing Rotary Valves... -
Page 5: Tools Needed
Installing Rotary Valves If you purchased a heated valve box (19238A/B, G1580A, or G1581A), or a side mount kit (G2748A or G2749A), install it before installing your valve. To install a valve in a heated valve box, see page To install a valve on a side mount bracket, see page Tools needed Torx T-10 and T-20 drivers... - Page 6 Installing Rotary Valves Mounting screws Upper valve box Heater/sensor wires Lower valve box Figure 3 Opening the valve box 3 Remove the heater block mounting screw in the lower valve box. Valve 4 Valve 3 Remove the screw in the heater block at the Valve 2 position where you will install the valve.
- Page 7 Installing Rotary Valves back of the GC if installed correctly. This is the ON position. Tighten the two screws with a Torx T-10 screwdriver. If this is the last valve to be installed in the heated zone, make sure the screws that secure the heater block to the lower valve box are tight.
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Page 8: Reinstall The Upper Valve Box
Installing Rotary Valves 6 Use the tubing and fittings in the hardware installation kit to plumb the valves. See “Common valve configurations" page 11. Reinstall the upper valve box 1 Verify that all valve rotors are in the full counterclockwise position. - Page 9 Installing Rotary Valves 4 Locate the two half–moon cutouts at the bottom back of the upper valve box. Place the upper box on top of the lower valve assembly, routing the heater/sensor wires through the cutouts. Secure with two T-20 Torx screws. 5 For each actuator, push the coupling/shaft assembly downward with a flat blade screwdriver until the slot on the coupling engages the valve rotor index pin.
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Page 10: Installing A Valve On A Side Mount Bracket
Installing Rotary Valves Installing a valve on a side mount bracket The oven, inlet, and detector may be very hot. Before proceeding, WA RN ING turn off the oven and all other heated zones and let them cool down. Harmful gases may be present. Hydrogen (if used) can present an explosion hazard. - Page 11 Installing Rotary Valves 2 With a flat blade screwdriver, turn the actuator coupling/shaft assembly counterclockwise until snug. Turn counterclockwise Figure 11 Setting the coupling shaft 3 Use needle–nosed pliers to move the valve rotor index pin of the valve counterclockwise until the pin touches the valve stop (Off position).
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Page 12: Restoring The Gc To Operating Condition
Installing Rotary Valves Restoring the GC to operating condition 1 If the electronics side or top cover was removed to install an actuator and solenoid, reinstall it now. 2 Plug in the power cord and turn on the GC. 3 Configure the valves. See your GC Operating Manual if you need help. -
Page 13: Common Valve Configurations
Installing Rotary Valves Common valve configurations 1 The next several pages show some commonly used valve configurations. Adjustable Restrictor valves Arrows indicate the are used to adjust the pressure direction of flow. drop (e.g., to balance flow) Fixed (non-adjustable) restrictors Loops have a Union specified volume... -
Page 14: Valve Plumbing Tips
Installing Rotary Valves Valve plumbing tips • Use bulkhead fittings with attached tubing for column connections. Mount the fitting, pointing down, on the left or right nut plate and secure with a retaining nut. Connect the free end of the tubing to the valve. •... - Page 15 Installing Rotary Valves Column 2 Column 2 Column 1 Column 1 Carrier Detector or valve Adjustable restrictor valve Column isolation* *Temperature limited to 235 °C by micrometering needle valves to GSV Stream 1 ln Sample in Vent Stream 2 ln Two stream selection (requires gas sampling) Installing Rotary Valves...
- Page 16 Installing Rotary Valves Column Carrier Detector Backflush to detector Precolumn 1st Carrier Vent 2nd Carrier Column Detector Backflush a precolumn to vent Installing Rotary Valves...
- Page 17 Installing Rotary Valves Column 1 From flow controller, Inj. Port or GSV Column 2 Column selection (unused column isolated) Column 1 Carrier Carrier Detector Column 2 Sequence reverse Installing Rotary Valves...
- Page 18 Installing Rotary Valves Column 1 Carrier Detector Column 2 Sequence reverse with backflush of column 1 Installing Rotary Valves...
- Page 19 Installing Rotary Valves Column Detector or 2nd Valve Precolumn 1st Carrier Vent Sample Loop 2nd Carrier Gas sampling with backflush of precolumn to vent Installing Rotary Valves...
- Page 20 Installing Rotary Valves Column Carrier Detector or 2nd valve Sample Loop Gas sampling with backflush to detector Loop 2 Sample 2 Carrier Sample 1 Detector or 2nd Valve Loop 1 Gas sampling of alternate streams Installing Rotary Valves...
- Page 21 Installing Rotary Valves Column 2 Carrier Sample Column 1 Loop Gas sampling with sequence reverse Column 2 Carrier Detector Sample 2nd valve Column 1 Gas sampling with sequence reverse and backflush of column 1 Installing Rotary Valves...
- Page 22 Installing Rotary Valves Column 2 Carrier 1 Vent Carrier 2 Column 1 Detector or 2nd Valve Column selection with backflush to vent Carrier Liquid sampling Installing Rotary Valves...
- Page 23 Installing Rotary Valves Column 1 Column 2 Carrier Detector Loop Sample Adjustable Restrictor valve Gas sample and column isolation Column 1 Column 2 Carrier Sample Detector Loop Adjustable Restrictor valve Gas sample/backflush and column isolation Installing Rotary Valves...
- Page 24 Agilent Technologies Printed on recycled paper. This product is recyclable. Agilent Technologies, Inc. Printed in USA, April 2002 G2739-90107...