3. Disconnect the tube fitting from the pressure bolt that shows
evidence of leaking, then unscrew the pressure bolt from the
valve body.
4. Inspect the port face. If it is scratched or plugged, carefully pry
it out of the pressure bolt, using the extractor tool (P/N 038930)
designed for this. Press a new port face (P/N 038599) into the
pressure bolt. Be careful to not scratch the sealing surfaces!
5. Screw the pressure bolt into the valve body. Tighten each
pressure bolt fingertight, then use an open end wrench to tighten
an additional one-eighth turn.
For optimal leak-free operation at 28 MPa (4000 psi), all eight
pressure bolts must be evenly tightened against the slider
(128 in-oz). A special torque wrench kit (P/N 038943) is
available from Dionex.
6. Turn on the liquid flow and check for leaks. Tighten pressure
bolts further if leaks appear.
For optimal leak-free operation, a torque wrench can be used to
evenly tighten pressure bolts. Refer to Installation and
Maintenance of the Dionex Inert High-Pressure Valve (Document
No. 032678) for torque requirements. Use caution as
overtightening may break off the bolt in the valve body.
7. Reconnect the tube fitting to the pressure bolt. Use a wrench to
prevent the pressure bolt from turning while tightening the
fitting. Tighten the fitting fingertight, then an additional
one-eighth turn. Tighten further only if leaks appear.
5.8 Servicing the Rheodyne Injection Valve
The Rheodyne injection valve requires infrequent servicing. See the
Rheodyne Valve Operator’s Manual (Document No. 034468) for
specific maintenance and service requirements. For major
disassembly, contact the nearest Dionex Regional Office for
assistance.
5
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Service
Doc. 034859-02 9/93
5-9
Summary of Contents for LC20
Page 6: ...Contents iv Doc 034859 02 9 93 ...
Page 8: ...LC20 Chromatography Enclosure 1 2 Doc 034859 02 9 93 ...
Page 12: ...LC20 Chromatography Enclosure 2 2 Doc 034859 02 9 93 ...
Page 24: ...LC20 Chromatography Enclosure 2 14 Doc 034859 02 9 93 ...
Page 26: ...LC20 Chromatography Enclosure 3 2 Doc 034859 02 9 93 ...
Page 29: ...Figure 3 7 Drawing Sample 3 Operation and Maintenance Doc 034859 02 9 93 3 5 ...
Page 32: ...LC20 Chromatography Enclosure 3 8 Doc 034859 02 9 93 ...
Page 34: ...LC20 Chromatography Enclosure 4 2 Doc 034859 02 9 93 ...
Page 40: ...LC20 Chromatography Enclosure 4 8 Doc 034859 02 9 93 ...
Page 42: ...LC20 Chromatography Enclosure 5 2 Doc 034859 02 9 93 ...
Page 50: ...LC20 Chromatography Enclosure 5 10 Doc 034859 02 9 93 ...
Page 52: ...LC20 Chromatography Enclosure A 2 Doc 034859 02 9 93 ...
Page 56: ...LC20 Chromatography Enclosure B 2 Doc 034859 02 9 93 ...
Page 65: ...Figure B 6 Electrochemical Cell Plumbing Schematic B Installation Doc 034859 02 9 93 B 11 ...