10
6.1.3. Adjusting the Set Point
Should it be required to adjust the set point please follow the instructions below:
i.
Using a 34mm open ended spanner or adjustable wrench, Remove the Top Cover
(27), from the Bonnet (25)
ii.
Loosen the Locking Nut (18), using a 13mm open ended spanner or adjustable
wrench
iii.
Connect the correct fittings to the Inlet and Outlet ports of the regulator. Ensure
that any gauge ports are plugged or that the correct gauge is fitted
iv.
Connect the Outlet port to a calibrated pressure test gauge appropriate to the
required set pressure. As the regulator is non-venting, ensure that a ball/needle
valve is fitted to allow pressure to be relieved downstream of the regulator
v.
With the Regulator Body (26) secured in a vice apply the Maximum Working
Pressure (MWP) to the Inlet of the regulator
vi.
Using a slotted screwdriver, turn the Adjusting Screw (13) clockwise until the
desired set point has been reached
vii.
Ensure repeatability by allowing flow through the regulator by opening/closing the
ball/needle valve
viii.
With the outlet pressure set, screw/tighten the Lock Nut (18) to the base of the
Adjusting Screw (13) and against the Bonnet (17).
ix.
Using a 13mm open ended spanner or adjustable wrench, ensure that the Lock
Nut (18) is sufficiently tightened, taking care not to adjust the set point
x.
If the set point is not correct, repeat steps vi. to ix.
xi.
Isolate the upstream pressure, then allow pressure to be released by opening the
downstream valve until flow diminishes completely
–
then the regulator can be
removed from test set up.
