|Type of Certificate||A-FS&CS Certificate|
|Certificate Holder||Buschjost GmbH|
|Product Category||Actuators > Valves|
|Subject||2/2-way piston valves|
|Type Designation||85840, 85850, 85780, 85790
(zzgl. abgeleitete Sondernummern / plus derived special products)
|Codes and Standards||
|Scope and Result||The safety function of the piston valves is defined as switching into the normal position (NC or NO) on demand. When the solenoid is de-energized the valves are set via spring force into closed (NC) or open (NO) state according to their design.
The valves are suitable for use in a safety instrumented system up to SIL 2. Under consideration of the minimum required hardware fault tolerance HFT=1 they may be used in a redundant structure up to SIL 3.
|Specific Provisions||The instructions of the associated Safety, Installation and Operating Manual shall be considered.|
|Valid Until||2020-11-17 (Certificate expired)|
|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