Honeywell HON 512, User And Maintenance Manual

Page: 20 / 208

Description
HON 512 with HON 650 pilot user manual 20
The HON 512 actuator assembly is subdivided into the following pressure
sections:
Figure Color Meaning
Closed state:
Inlet pressure
Motorization pressure
Outlet pressure
Open state:
▪
The diaphragm unit inside the actuator assembly subdivides the inside of the body into
two chambers that are separated from each other in a gas-tight manner and into the
gas flow path.
▪
The diaphragm unit inside the actuator assembly can be moved axially.
When this unit is moved to its right-
hand end position (in the gas’ direction of flow), the
sleeve that conveys gas will slide onto the valve disc. Accordingly, the actuator assembly
will be closed and the flow of gas will be suppressed.
In the left-hand end position, there will be the biggest possible gap between the sleeve
and the valve disc. In this state, the actuator assembly will be completely open and the
flow of gas will be at its maximum level.
▪
The actuator assembly’s degree of opening dynamically regul ates the gas pressure.
▪
The actuator assembly’s degree of opening will depend on the position of the dia-
phragm unit.
Actuator assembly pres-
sure sections
How the actuator as-
sembly works