1.0:E43
First stage valve:
1. Connect the regulator to the test equipment.
2. Connect the test manometer hose to one of the
low pressure outlets.
3. Open the LP valve (=20 bar).
4. Set the secondary pressure at 10 bar, and
intermittently purge the second stage by means
of the purge button. NOTE that the second stage
valve must be fully tight during this test. When
the pressure gauge needle stops at the preset
pressure, a maximum rise in pressure of 1 bar is
allowed before the needle finally stops. If the
needle continues to move to a higher pressure
reading there is a fault in the seal between the
valve seat and piston or the O-ring.
5. Close the LP valve, and open the HP valve
(=200/300 bar). Purge intermittently with the
purge button, check the tightness, and adjust the
pressure to 8.5-9 bar.
Second stage valve: Tightness testing of the low
pressure valve withservo valve.
1. Close the HP valve and purge fully by means of
the purge button.
2. Remove the low pressure valve from the second
stage housing.
3. Place the low pressure valve in the test fixture and
screw on the hose.
4. Open the LP valve, push the servo valve’s needle
carefully, and purge a few times. Immerse the
valve below the surface of the water in a special
water tank and check to make sure that the valve
is absolutely tight.
5. Move the low pressure valve to the second stage
valve and fit the low pressure valve’s outlet to the
guide fitting in the second stage housing. Make
sure that the valve is inserted straight to prevent
the servo valve from becoming damaged.
6. Lubricate the external thread on the second stage
housing and the end of the hose nipple. Screw on
the low pressure hose.
Adjustment of the inhalation resistance:
1. Open the HP valve.
2. Connect the oval connecting pipe on the
inhalation resistance gauge to the mouth-piece
on the regulator.
3. Test-breathe very carefully. Check the reading of
the gauge needle, which should rise to 35-40
mm/vp and then move back. The turning point
reading equals the inhalation resistance. If the
reading is too low, screw the valve tube away
from the diaphragm as shown in the illustration. If
the reading is too high, screw the valve tube
towards the diaphragm.
Checking the purge button:
1. Press the purge button. The second stage valve
should now provide a generous supply of air.
2. Cover the mouth-piece and press the purge
button. The second stage valve should then
supply a reduced flow air.
JETSTREAM
TESTING AND ADJUSTMENT OF REGULATOR
JETSTREAM Art. No. 2960, 3960
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