1. Design and principle of operation
The electric actuators basically consist of a re-
versable synchronous motor of the perma-
nent-magnet rotor type with a maintenance-
free gear. The actuator components housed in
the plastic enclosure are connected to the
control valves using one of two methods: 1)
form-fit by means of two connecting clamps
and a clamp ring or 2) force-locking by
means of a union nut.
Actuators with fail-safe action (Type 5822
Actuator) are equipped with a spring mech-
anism which, depending on the operating di-
rection, opens or closes the connected valve.
Typetest
The actuators with fail-safe action OUT "actu-
ator stem extends" have been tested acc. to
DIN (DIN 32 730) in combination with
various control valves. The respective register
numbers are printed on the nameplate.
Electric Actuators
Type 5821
⋅
Type 5822, form-fit connection
Type 5821
⋅
Type 5822, force-locking connection
Edition September 1993
Mounting and operating instructions
EB 5821/5822 E
Type 5822 Electric Actuator,
force-locking connection
Type 5821 Electric Actuator,
form-fit connection
Fig. 1
⋅
Electric actuators
