Burkert Type 8696 - Manual (Page 12)

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Systemdescription
The position of the actuator is regulated according to the position set-point value. The nominal position value is
specified by an external standard signal.
Pneumatically actuated piston actuators and rotary actuators can be used as an actuator. Single-acting actuators
are offered in combination with the positioner.
For single-acting actuators, only one chamber is aerated and deaerated during actuation. The generated pressure
works against a spring. The piston moves until there is an equilibrium of forces between compressive force and
spring force.
5.3. Features of the valve types
Angle seat control valves / Straight seat
control valves
Diaphragm Valves
Types • 2300
• 2301
• 2103
Features • incoming flow under seat
• no pressure surges when closing the valve
• straight flow path of the medium
• self-adjusting packing gland for high
leak-tightness
• medium is hermetically separated from the
actuator and environment
• cavity-free and self-draining body design
• any flow direction with low-turbulence flow
• steam-sterilizable
• CIP-compliant
• no pressure surges when closing the valve
• actuator and diaphragm can be removed
when the housing is installed
Typical media • water, steam and gases
• alcohols, oils, propellants, hydraulic fluids
• salt solutions, lyes (organic)
• solvents
• neutral gases and liquids
• contaminated, abrasive and aggressive
media
• media of higher viscosity
Table 1: Features of the valve types
english
Type 8696