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Building Technologies Operation Manual and Mounting Instructions VGD4 / VRD4 / SKPx5 CC1U7643en
14.03.2018
7 Lifetime
The combination of VGD4/VRD4 double gas valve and SKPx5 actuator has a design
lifetime* of
Nominal size Burner startup cycles
′DN 25 200,000
DN 25...80 100,000
DN 80...150 50,000
when using gases according to EN 437 (or DVGW specification G260).
This is based on the endurance tests specified in the standard EN 161.
A summary of the conditions has been published by the European Control
Manufacturers Association (Afecor) (www.afecor.org).
The designed lifetime is based on the use of a VGD4/VRD4 double gas valve and an
SKPx5 actuator according to the manufacturer’s data sheet. After reaching the
designed lifetime in terms of the number of burner startup cycles, or after the
corresponding usage time, the VGD4/VRD4 double gas valve and SKPx5 actuator
must be checked and/or replaced by authorized personnel.
The criteria set out in EN 161 / EN 13611 are applicable when testing the tightness.
This test can be omitted if a valve proving system is in place.
* The designed lifetime is not the warranty time specified in the Terms of Delivery.
Safety components
Structural lifetime
CEN standard
Number of cycles Time (years)
Gas pressure monitor 50,000 10 EN 1854
Double gas valve (with valve proving
system)
After detecting a fault EN 1643
Double gas valve (without valve proving
system)
50,000…200,000 10
EN 126
EN 161
Siemens AG Building Technologies
Berliner Ring 23
76437 Rastatt, Germany
Tel. +49 7222 598 279
Fax +49 7222 598 269
www.siemens.com
© 2018 Siemens AG Building Technologies
Subject to change!
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