Type MR105
9
1.
Check that proper installation is completed
and downstream equipment has been
properly adjusted.
2.
Make sure all block and vent valves are closed.
3.
Slowly open the valves in the following order:
a. Loading supply and control line valve(s),
if used
b. Inlet shut-off valve
c. Outlet shut-off valve
4.
If the regulator has the bleed valve option, slowly
open valve to allow air to escape from lower
casing. Once fluid starts to bleed out, close valve.
CAUTION
The regulator is factory-set as specified
on the order or at the midpoint of the
spring range. The allowable spring
range is stamped on the nameplate. If
a pressure setting other than the one
specified is desired, be sure to change
the pressure setting by following the
Adjustment procedure.
5. If resetting setpoint, then set the regulator to
the desired outlet pressure according to the
Adjustment procedure.
Adjustment
Key numbers are referenced in Figure 6.
!
WARNINg
Personal injury, equipment damage
or leakage due to escaping fluid may
result if adjusting screw (key 73) and
jam nut (key 72) are not installed
properly. Also, main spring (key 68)
may go solid resulting in the regulator
not locking up if jam nut is not installed
and adjusting screw is adjusted
completely down.
The factory setting of the regulator can be varied
within the pressure range stamped on the nameplate.
To change the outlet pressure, loosen the jam nut
(key 72) using a hand wrench (not an impact gun),
turn the adjusting screw (key 73) clockwise to
increase outlet pressure setting or counterclockwise
to decrease it. Monitor the outlet pressure with a test
gauge during the adjustment. Tighten the jam nut to
maintain the desired setting.
All regulator springs can be backed off to provide zero
outlet. Recommended outlet pressure ranges available
and color codes of the control springs are shown in the
Specifications section and in Table 2.
Shutdown
!
WARNINg
Personal injury, equipment damage
or leakage due to escaping fluid may
result if needle valves are used to isolate
the pressure reducing regulator. It is
strongly recommended that block valves
be used to properly isolate the regulator
from system.
escaping process fluid from an open
drain valve (see Figure 5) may result in
regulator damage, personal injury and
property damage. To avoid such injury
Figure 5.
Type MR105 with High Pressure Actuator, Drain Valve
and Bleed Valve Option
1/4 NPT dRAIN
VALVe (key 82)
1/8 NPT INLeT
BLEED VALVE
(key 85)
