188.8.131.52 Applications. For fueling systems, use
hydraulically operated diaphragm control valves in the
following applications (also refer to specific sections for
a) Water slug shutoff.
b) Rate of flow control.
c) Pressure reduction.
d) Pressure relief.
e) Liquid level control.
f) Non-surge check control.
g) Deadman control.
h) Electrical block control.
also possible. A typical use of these controls is on a
filter/separator for water slug shutoff and rate of flow
facility may include temperature, pressure, fuel level and
pump controls, automatic flow controls, alarm and limit
switches, motor- and pilot-operated valves, and remote system
condition indicators. Other forms of automatic controls are
remote meter indication, electronic access control, data
logging, and application of computer techniques. Base the
selection of advanced automation and telemetry systems on a
study of the particular application with consideration of
Flow Controls. Where it is possible to achieve flow
rates which exceed equipment ratings, provide an adjustable
flow control valve on the outlet connection of each meter or
filter/separator. Use a self-actuating hydraulically operated
diaphragm control valve controlled by the pressure