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Installation Manual
Content
December 2020
Installation Manual
TR000238ENUS-01_12-20
Pressure Activation Methods
TESCOM uses four basic types of activation methods. The activation method provides the
means by which the operator can set the force that determines the outlet pressure of a
regulator.
Control Knob: Delivery pressure is increased by turning the control knob. The control knob
applies a load through a spring to the piston.
Dome Load: Delivery pressure is increased by applying pressurized gas or liquid to the
dome of a regulator at a pressure equal to the outlet pressure desired. This dome pressure
is normally provided by a second regulator called the pilot regulator.
Combination Spring and Dome: Delivery pressure is increased by applying a spring force as
well as the introduction of pressurized gas or liquid.
Air Actuated (Multiplier): Delivery pressure is controlled by applying 0-100 psig pilot
pressure to the air actuator, resulting in full outlet pressure range control.
Operation (Control Knob Adjustment)
Controlled back pressure settings are obtained using TESCOM back pressure regulators
by adjusting the control knob. Rotating the knob clockwise raises the inlet pressure while
a counterclockwise rotation will lower the inlet pressure. Final adjustments should be
made in the direction of increasing pressure to obtain the most accurate back pressure
set pressure.
TESCOM regulators will operate with any liquid or gaseous media compatible with the
wetted materials. Some series/modifications come with an internal filter that only are
designed to stop random contamination resulting from the installation of the regulator.
An auxiliary upstream filter is recommended for use in all but the cleanest media. Gaseous
media should be free of excessive moisture to prevent icing of the regulator at high flow
rates.
WARNING
A back pressure regulator is not intended to be used as a system safety relief device. When
the regulator is not in use, the inlet pressure should be turned off.
Maintenance
The following procedures are provided to enable the customer to perform all normal
maintenance and repair operations. These operations are more easily performed with the
regulator removed from the line. However, in some cases repair may be accomplished
without removal of the regulator body as long as the supply has been shut off and the
inlet and outlet pressures have been vented.
An Assembly Drawing and Bill of Material for the regulator will be needed to complete
maintenance procedures. The Assembly Drawing and Bill of Material are separate from
this manual and available by contacting TESCOM (see last page for TESCOM contact
information).
3.4.2
3.4.3
3.4.4
