Operation Manual Piston Sensed Pressure Regulators
g. Using 3/8 inch wrench on stem flats, turn stem clockwise to increase the delivery pressure to
the desired pressure.
Note: The delivery pressure will decrease as the flow rate is increased. It may be
advantageous to compensate by adjusting the regulator to the desired delivery pressure while
operating at the desired flow conditions. Be aware the delivery pressure will rise if the flow
is shut-off or decreased downstream.
h. Reinstall jam nut and tighten to 100 in-lb against regulator bonnet.
i. Reinstall acorn nut and tighten to 40 in-lb against jam nut.
G. Pneumatically Actuated, Non-relieving (non-venting) Regulator Operation
Note: A pressure regulator should not be used as a positive shut-off device.
Caution: Do not reduce the actuation control pressure under no flow conditions as damage to the
regulator internal parts or leakage may result.
Caution: Do not pressurize the regulator low pressure side except by slowly increasing the actuation
control pressure, as damage to the regulator internal parts or leakage may result.
1. Perform the following to increase the regulator delivery pressure set point.
a. Before opening the source valve, verify that the actuation control pressure is at atmospheric
pressure.
b. Slowly open the source valve to pressurize the regulator high pressure port.
c. Slowly increase the actuation control pressure to increase the delivery pressure to the desired
pressure. See Figure 4 and Figure 5 for delivery pressure versus actuation control pressure
charts for the pneumatically actuated KT10 and KT12 models.
Note: The delivery pressure will decrease as the flow rate is increased. It may be
advantageous to compensate by adjusting the regulator to the desired delivery pressure while
operating at the desired flow conditions. Be aware the delivery pressure will rise if the flow
is shut-off or decreased downstream.
2. Perform the following to decrease the regulator delivery pressure set point for non-relieving
(non-venting) regulators.
a. Open a downstream valve to initiate a flowing condition.
b. Reduce the actuation control pressure to reduce the delivery pressure below the desired
pressure.
c. Increase the actuation control pressure to obtain the desired delivery pressure.
Note: The delivery pressure will decrease as the flow rate is increased. It may be
advantageous to compensate by adjusting the regulator to the desired delivery pressure while
operating at the desired flow conditions. Be aware the delivery pressure will rise if the flow
is shut-off or decreased downstream.
3. Perform the following to fully decrease the regulator.
a. Close the source valve.
b. Vent outlet pressure to atmospheric pressure while applying actuation control pressure to
allow both sides of the pressure regulator to vent to atmospheric pressure.
c. Vent or otherwise reduce the actuation control pressure to atmospheric pressure.
Please contact the factory or your local representative to answer questions or for further
information
Page 7 of 9 Manual 15000011 Rev. 5
(13 pages)
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