|Type of Certificate||A-FS&CS Certificate|
|Certificate Holder||ASCO SAS|
|Product Category||Actuators > Valves|
|Subject||3/2-way or 5/2-way Solenoid Control Valve with Safety Function|
|Type Designation||551 series|
|Codes and Standards||
|Scope and Result||Safety function: Move to fail-safe position by spring force, if auxiliary power is cut off or fails. Depending on the piping of installation, the valve will supply the fluid media or vent the fluid media.
The assessment based on the certification program of the Certification Body comes to the result that the valves meet the requirements of
IEC 61508 and are therefore suitable for use in a safety instrumented system up to SIL 2 (low demand mode).
Under consideration of the minimum required hardware fault tolerance
HFT = 1 the valves may be used in a redundant architecture up to SIL 3 acc. IEC 61508 and IEC 61511.
|Specific Provisions||The instructions of the associated Installation, Operating and Safety Manual shall be considered.|
|Certificate/Reg.-No.||Certificate Holder||Product Category||Product Tested||Type Designation||Details|
Remark: In case of missing entries this is due to restrictions by the certificate holder