Emerson EL-O-Matic F Series - Position after Failure; Principles of Operation; Solenoid Valve

Installation
4.2.2 Position After Failure
The position of the actuator after a failure depends on the:
1. Principle of operation (see paragraph 4.3)
2. Assembly codes (see paragraph 4.4)
3. Kind of failure. Refer to the table below.
Table 5. Position After Failure
Principle of
Operation
Assembly Code Kind of Failure Position
Double-Acting
Actuator
Pressure Not dened
Signal Closed
Supply Voltage Closed
Pressure Not dened
Signal Open
Supply Voltage Open
Single-Acting
(Spring-Return)
Actuator
Pressure Closed
Signal Closed
Supply Voltage Closed
Pressure Open
Signal Open
Supply Voltage Open
4.3 Principles of Operation
4.3.1 Solenoid Valve
All actuators can be either piped with solid or exible tubing with the solenoid valve
mounted remotely from the actuator or by mounting a VDI/VDE 3845 (NAMUR) designed
solenoid valve DIRECTLY onto the NAMUR mounting pad on the side of the actuator.
Figure 4 Typical solenoid operation
A
BA
Spring-Return Operation Double-Acting Operation
CW
CW
10
September 2017
Installation, Operation and Maintenance Manual
DOC.IOM.EF.EN Rev. 7
Section 4: Installation