Michell Instruments Easidew Online, Руководство пользователя

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Easidew Online User’s Manual
Michell Instruments 15
INSTALLATION
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1
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2 3 4 5
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4
5
6
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2
3
4
5
Figure 12 Sample Block Gas Connections
Both the Input and Output gas connections are ⅛ ” NPT. It is recommended that both
the Gas Input and Output connections are made made via ⅛ ” NPT to 6mm or ⅛ ” NPT
to ¼” stainless steel tube adaptors (2 to 5 - Figure 12). The method of connection to
the sensor block (6) is as follows:
NOTE: The following description relates to 6mm tube fi xings. The sample
block ports are both ⅛ ” NPT female process connections. Tube adaptors are
not supplied with the equipment but can be obtained by contacting your local
distributor or Michell Instruments (see www.michell.com for details).
1. Cut a suitable length of 6mm (¼” U.S.) stainless steel tubing (1) to the
correct length and, if necessary, bend to shape to suit the location of the
sensor block assembly. NOTE: To facilitate ease of connection to the
port, at least 75mm (3”) of the tubing coming out of the Gas In
port must be straight.
2. Clean off any burrs or metal shavings adhering to the tubing.
3. Screw the ⅛ ” NPT (¼” U.S.) NPT Swagelok adaptor (5) into the ⅛ ” NPT
(¼” U.S.) NPT inlet port in the sensor block (6) and tighten to a torque
setting of 35 Nm (25 lbf-ft).
4. Pass the stainless steel tubing (1) through the locking nut (2). NOTE:
Threads towards the gas port.
5. Fit the back ferrule (3) over the stainless steel tubing (1) with the bevelled
end facing the back of the front ferrule (4).
6. Place the front ferrule (4) over the stainless steel tubing (1), bevelled end
towards the adaptor (5).
7. Push the stainless steel tubing (1) as far as it will go into the adaptor (5)
and tighten up the locking nut (2) fi nger tight.
8. Hold the adaptor (5) fl ats with a spanner and tighten up the locking
nut (2) to a torque setting of 35 Nm (25 lbf-ft) (1¼ turns). This action
compresses the front ferrule (4) and back ferrule (3) onto the tubing to
form a gas tight seal.
9. Connect up the other gas port as described in steps 1 to 8 above.