WARNING
Only qualified personnel should install 
or service a regulator. Regulators should 
be installed, operated and maintained in 
accordance with international and applicable 
codes and regulations and Emerson Process 
Management Regulator Technologies, 
Inc. instructions. 
If the regulator vents fluid or a leak develops 
in the system, it indicates that service 
is required. Failure to take the regulator 
out of service immediately may create a 
hazardous condition.
Personal injury, equipment damage or leakage 
due to escaping fluid or bursting of pressure-
containing parts may result if this regulator 
is overpressured or is installed where service 
conditions could exceed the limits given in the 
Specifications section, or where conditions 
exceed any ratings of the adjacent piping or 
piping connections.
To avoid such injury or damage, provide 
pressure-relieving or pressure-limiting devices 
(as required by the appropriate code, regulation 
or standard) to prevent service conditions from 
exceeding limits. 
Additionally, physical damage to the regulator 
could result in personal injury and property 
damage due to escaping fluid. To avoid such 
injury and damage, install the regulator in a 
safe location.
Clean out all pipelines before installation of the regulator and 
check to be sure the regulator has not been damaged or has 
collected foreign material during shipping. For NPT bodies, 
apply pipe compound to the external pipe threads. For flanged 
bodies, use suitable line gaskets and approved piping and 
bolting practices. Install the regulator in any position desired, 
unless otherwise specified, but be sure flow through the body is 
in the direction indicated by the arrow on the body.
Note
It is important that the regulator be installed 
so that the vent hole in the spring case 
is unobstructed at all times. For outdoor 
installations, the regulator should be located 
away from vehicular traffic and positioned 
so that water, ice and other foreign materials 
cannot enter the spring case through the 
vent. Avoid placing the regulator beneath 
eaves or downspouts, and be sure it is above 
the probable snow level.
Overpressure Protection
The recommended pressure limitations are stamped on the 
regulator nameplate. Some type of overpressure protection 
is needed if the actual inlet pressure exceeds the maximum 
operating outlet pressure rating. Overpressure protection 
should also be provided if the regulator inlet pressure is greater 
than the safe working pressure of the downstream equipment.
Regulator operation below the maximum pressure limitations 
does not preclude the possibility of damage from external 
sources or debris in the line. The regulator should be 
inspected for damage after any overpressure condition.
Startup
The regulator is factory set at approximately the midpoint 
of the spring range or the pressure requested, so an initial 
adjustment may be required to give the desired results. 
With proper installation completed and relief valves properly 
adjusted, slowly open the upstream and downstream 
shutoff valves.
Adjustment
To change the outlet pressure, remove the closing cap or 
loosen the locknut and turn the adjusting screw clockwise 
to increase outlet pressure or counterclockwise to decrease 
pressure. Monitor the outlet pressure with a test gauge 
during the adjustment. Replace the closing cap or tighten the 
locknut to maintain the desired setting.
Taking Out of Service (Shutdown)