Burkert Type 2300 - Manual (Page 10)

10
Structure and function
Actuator cover
Actuator body
Interface actuator/body with wrench flat
Angle-seat body
Numbers for indicating the direction of
flow
Port connection
Exhaust air port for CFA, CFB
Pilot air port for CFI
Pilot air port for CFA, CFB, CFI
2
1
Fig. 1: Angle-seat control valve Type 2300, structure and
description
6.2. Function
The seat of the valve is always closed against the medium flow.
Spring force (CFA) or pneumatic pilot pressure (CFB and CFI) gen-
erates the closing force on the control cone. The force is transferred
via a spindle which is connected to the actuator piston.
6.2.1. Control functions (CF)
WARNING!
For control function I – Danger if pilot pressure fails!
For control function I control and resetting occur pneumatically.
If the pressure fails, no defined position is reached.
• To ensure a controlled restart, first pressurize the device with
pilot pressure, then switch on the medium.
Control function A (CFA)
Normally closed by spring action.
english
Type 2300