6
EN
Pressure Regulator
LAB11141_Issue 1
June 2019
Figure 2
Figure 3
8.3
Deep Purge Installation
8.3.1 To install a ‘Deep Purge’ to a pressure regulator, it may be necessary to remove the regulators inlet connection. This is achieved by securing the regulator
firmly in an appropriate manner (Gas-Arc Universal Cradle:
Part No. TOL01938
) and unscrewing (anti-clockwise) the connection free from the body of the
regulator (1/4 NPT joint).
8.3.2 When the connection is removed, clean the ¼ NPT male and female parts, ensuring existing PTFE tape is removed and they are free from contamination
and/or damage.
8.3.3 Fit the inlet connection to the inlet of the ‘Deep Purge’ as shown above in
figure 3
, using the PTFE jointing guidance detailed in
sections 5.4 and 5.5
(rotate
clockwise).
8.3.4 Again using the above PTFE jointing guidance given, fit the outlet of the ‘Deep Purge’ to the inlet of the regulator (clockwise).
8.4
Deep Purge: Operation
When installed a
‘Deep Purge’
facility allows the user to introduce a purge gas into the high pressure feed of the regulator/system, enabling the dilution or purging of
corrosive, toxic or pyrophoric gases prior to use or decommissioning. The user must always ensure that the waste/vent valve discharges via a piped or contained system
into a well-ventilated area. When introducing a purge gas, this must be done via a separate supply system or regulator delivering a
MAXIMUM of 10 bar (150 PSI).
8.4.1 When fitting the regulator and ‘Deep Purge’ assembly to a cylinder/vessel/system use instructions detailed in
section 5.0 – Installation
8.4.2 Connect the purge gas feed line to the inlet of the inlet isolation valve and the vent line from the outlet of the Waste/Vent using the PTFE jointing guidance
given in
sections 5.4 and 5.5
.
8.4.3 After the equipment is installed, but before opening the cylinder/isolation valve, ensure that the high pressure isolation valve, inlet isolation valve and the
waste/vent valves are closed.
8.4.4 Open the inlet isolation valve, allowing the purge gas to fill the ‘Deep Purge’ assembly diluting any impurities, corrosive, toxic or pyrophoric gases
DO NOT EXCEED 10 bar (150 PSI).
8.4.5 When charged, first close the inlet isolation valve, then open the waste/vent valve allowing the purge gas to escape. Continue this process 5 – 8 times,
pulse purging the ‘Deep Purge’ assembly.
8.4.6 When complete ensure the inlet isolation valve and the purge valve are closed, then slowly open the cylinder/isolation valve allowing the process gas to
enter the ‘Deep Purge’ assembly. When charged open the purge/vent valve allowing the process gas to purge out the purge gas for a period of around 3 to
5 seconds.
8.4.7 The pulse purging process should be completed every time a cylinder is changed, or when the equipment is decommissioned.
9
BONNET VENT CAPTURE KIT
9.1
If the regulator is connected to a cylinder/vessel/system, remove the regulator as detailed in
section 7
.
9.2
To remove the pressure adjusting knob and fit the ‘Bonnet Vent Capture Kit’, fully open the pressure regulator (turn pressure adjusting knob clockwise) to
lock the set lock nut in place.
9.3
Remove the label and locking screw from the pressure adjusting knob and pull free from the spindle, ensuring the pressure set lock has not moved.
9.4
Fit the ‘Bonnet Vent Capture Kit’ and lock nut onto the bonnet of the regulator, replace the pressure adjusting knob to its original position and replace the
locking screws.
9.5
When fitted, the ‘Bonnet Vent Capture Kit’ can be rotated around the circumference of the regulator bonnet to the desired position and locked in place with
locking nut provided.
9.6
Install the regulator to cylinder/vessel/system as detailed in
section 5
and pipe the ‘Bonnet Vent Capture Kit’ away to a well-ventilated area using the PTFE
jointing guidance detailed in
sections 5.4 and 5.5
(1/8 NPT).
9.7
Before pressurising the full system, check the set outlet pressure of the regulator to ensure it has been re-assembled correctly.
9.8
If the set outlet pressure of the regulator has moved outside of its set limit, remove the pressure adjusting knob as detailed above and proceed to re-set
the outlet pressure. To reduce the outlet pressure turn the set lock nut clockwise, to increase the outlet pressure turn the set lock nut anti-clockwise. When
complete align the flats on both the set lock nut and spindle head and replace the pressure adjusting knob, locking screw and label.
NOTE
9.9
NEVER increase the outlet pressure of a regulator outside of its stated pressure service.
