Table of Contents
Advertisement
Determining the lower and upper signal
pressure range values
1. Turn the spring adjuster (906) clockwise
until loading of the actuator spring (595)
starts.
2. Carefully raise the air supply to the point
at which the actuator stem (61) starts to
move.
3. Maintain this supply pressure and read
off the pressure value.
4. If this pressure reading is the same as the
lower signal pressure range value, con-
tinue as described in step 5.
If this pressure reading is not the same as
the lower signal pressure range value,
reduce the air pressure to the diaphragm
chamber to zero.
Readjust the spring adjuster (906):
− If the pressure reading is below the
lower signal pressure range value,
turn the spring adjuster (906) clock-
wise slightly. Continue as described
in step 2.
− If the pressure reading is above the
lower signal pressure range value,
turn the spring adjuster (906) coun-
terclockwise slightly. Continue as de-
scribed in step 2.
5. To check the upper signal pressure range
value, continue to raise the supply pres-
sure applied to the diaphragm chamber.
EB 8318 EN
NOTICE
!
Risk of actuator damage due to excessively
high supply pressure.
Î Do not allow the supply pressure to ex-
ceed the maximum permissible limit of
80 psi (5.5 bar).
The movement of the actuator stem (61)
must be linear and smooth.
6. Stop increasing the supply pressure at
the point where the travel indicator indi-
cates the maximum permissible travel.
The travel is specified on the nameplate
(see the 'Markings on the device' sec-
tion).
7. Read off the supply pressure value. This
supply pressure valve corresponds to the
upper signal pressure range value.
5.2.3
Mounting the actuator
onto the valve
Tip
The valve and actuator are assembled with
special attention paid to the actuator's bench
range and direction of action. These details
are specified on the actuator nameplate (see
the 'Markings on the device' section).
a) Version D
1. Close the valve by firmly pushing the
plug together with the plug stem down.
Installation
5-3
Advertisement
Table of Contents
