DLPs are standard-based pneumatic double-acting actuators according to DIN 3358.
The standardized mounting interface to DIN 3358 allows direct mounting on process valves such as knife gate valves. The connection diagram according to VDI/VDE 3845 on the actuator cover enables local control for open/close applications via the directly flange-mounted solenoid valve. Alternatively, the DLP can be controlled via a valve manifold. Various piston rod attachments are available as accessories for mounting the piston rod on the process valve.
An externally attachable linear potentiometer MLO-POT-...-LWG is available for control applications. This can be used for operation with an external valve positioner.
DFPIs are controllable standard-based pneumatic double-acting linear actuators according to ISO 15552 or DIN 3358.
Product versions with integrated linear potentiometer (DFPI-...-E-...) or completely integrated valve positioner (DFPI-...-C1V-...) are available.
In the DFPI-...-E-... version, the potentiometric linear potentiometer supplies an analog voltage signal proportional to the piston position. This can be used for operation with an external valve positioner.
In the DFPI-...-C1V-... version, the integrated valve positioner controls the position. This actuator has a factory-set fail-safe position which is assumed if the operating voltage or the analog setpoint fails.
The position is preset via an analog setpoint signal from 4 to 20 mA. The position feedback takes place via an analog feedback signal from 4 to 20 mA.The feedback signal provides the user with higher reliability and easier diagnosis.
The electrical and pneumatic connection of the DFPI is via a plug socket, which also provides protection. Due to the standardized ISO 15552 or DIN 3358 mounting interface, there is a wide range of accessories for nearly every installation situation.
DADG is an adapter kit for easy mounting of an external valve positioner with ISO 5210 interface on the DFPI-...-E-NB3P.
NHSB is a prefabricated protected electropneumatic connecting cable for the DFPI. The pneumatic and electrical connection cables are accommodated in a common protective conduit. This guarantees high mechanical and IP degree of protection. The connection to the DFPI actuator is via a plug socket, which also provides protection. The NHSB connecting cable is available in different lengths up to 15 m. It allows a quick and easy installation of the DFPI.