Line regulator pressure adjustment, Line regulator replacement – Amico Automatic Cryogenic Liquid Solenoid Manifold User Manual
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This procedure should be performed if the line regulator pressure is not within acceptable limits during performance
verification procedure or after installation of a new line regulator.
1. With both the banks supplying pressure, open ball valves on the inlet and outlet on only one side of the line regulator
to be adjusted.
2. Slightly press the bleed valve on the side of the regulator to create a small flow of gas though the manifold.
3. Using the handle on the bonnet of the regulator, turn to adjust the pressure to the specified setting, as mentioned on
the cabinet door by observing the line gauge.
4. Repeat (steps 1-3) to adjust the other line regulator.
5. After adjusting the pressure to the specified setting open all balls valves and ensure the supply line remains open.
Line Regulator Pressure Adjustment
If necessary, the line regulator replacement can be performed while manifold is in service. However, this should only be
done by qualified technicians experienced in servicing medical equipment.
1. Close the two ball valves on inlet and outlet of line regulator to be replaced.
2. Loosen union nuts on two closed isolation valves.
3. Vent pressure from the bank, which was shut off in step 2, by pressing the bleed valve on side of the regulator.
4. Ensure the orientation of fittings (direction of gas flow) is the same on the replacement regulator. Install fittings on new
regulator.
5. Inspect O-ring removed from the ball valve union. If damaged, replace O-ring.
6. Verify the correct orientation of fittings on the regulator; some slight adjustment may be required to align with the
ball valves without causing stress to the fittings.
7. Hand-tighten the two ball valve union nuts and then with a wrench snug lightly to ensure the fittings are secure.
NOTE: do not over tighten unions, as it is an o-ring seal.
8. Open ball valves and set the line regulator’s output pressure as described in Line Regulator Pressure Adjustment procedure.
Line Regulator Replacement