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Reliability of the pneumatic components used in safety systems values to use in application of EN ISO 13849-1
Reference: ISO 19973 - Pneumatic Fluid Power - Assessment of component reliability by testing

is the number of cycles until 10% of the components fail dangerously.

In pneumatic, mechanical and electromechanical technology, the life and reliability of components generally depends on wear linked to movements. Their life is also strongly affected by the working conditions, especially the following:

  • Compressed air quality and conditions
  • Lubricant compatibility with gaskets
  • Temperature
  • Environmental factors as such dust, gas and fluids. .

It is vital for the component manufacturer's requirements to be complied with, otherwise the failure parameters are not valid.

Product operating conditions are shown in Metal Work’s General Catalogue.

Unless specified otherwise in the catalogue, compressed air must be class 3-4-3, in accordance with ISO 8573-1.

Product family [cycles]
ISO15552 cylinders, round cylinders, series RNDC, polyurethane gaskets

30.000 km

corresponding to75x106 cycles with a reference stroke of 200mm
ISO 15552 cylinders, round cylinders, series RNDC, low-temperature NBR and FKM gaskets

15.000 km

corresponding to 37x106 cycles with an average stroke of 200mm
ISO6432 cylinders, SSC cylinders, compact cylinders, liner cylinders, stopper cylinders, polyurethane gaskets 60x106 cycles
ISO6432 cylinders, SSC cylinders, compact cylinders, liner cylinders, compact guided cylinders, low-temperature NBR and FKM gaskets 30x106 cycles
Flat Two cylinders 15 x106 cycles
Rodless cylinders

10.000 km

corresponding to 25x106 cycles with a reference stroke of 200mm
Hydraulic brakes, series BKK, integrated hydraulic brake 5 x106 cycles
Other standard cylinders in the catalogue Greater than or equal to 15 x106 cycles
Grippers series P1, P2, P3, P4, P7, P8, P9, P10, P11 5 x106 cycles
Rotary actuators series R1, series R3 10 x106 cycles
Slides series S10, series S11, series S12, series S13 10 x106 cycles

Mechanical valves:

series VME, series 70 MEV
2 x106 cycles

Manually-operated valves:

series 70 MAV, series PEV pedal-operated, two-handed safety operation
1 x106 cycles

Pneumatic valves:

series 70 PNV, series Mach 16 MPV, series Mach 11 MPV, series NAMUR, series ISO5599 IPV, series Mach 18 MPV
50 x106 cycles

Solenoid valves:

series 70 SOV, series NAMUR, series ISO5500 ISV, series Mach 18 MSV, series Mach 11 MSV, series Mach 16 MSV, series Multimach, series HDM, series CM, series PIV.M, series PIV on base and in line, CNOMO, series Minimach, series PLT-10, series SOV-L
50 x106 cycles

Field bus (electronic only, without valves):

HDM+AS-interface, HDM+Profibus, input Profibus-DP, Profibus-DP dedicated Mach 16, Profibus-DP / Interbus-S / Can-open / Device –net for Multimach
100 x106 cycles
The working life is calculated as the number of opening/closing cycles for valves and regulators, and the number of downstream pressure changes from 6.3 to 0 bar for the other components.

Filters, filter-purifiers, driers:

series Skillair, Bit, New Deal, ONE

Regulators and filters-regulators:

Series Skillair, Bit, New Deal, ONE, GS, Skilltronic, Regtronic, RML, RMC, RMS
10 x106 cycles


Series Skillair, Bit, New Deal
50 x106 cycles

V3V circuit shutoff valves:

series Skillair, New Deal, ONE
10 x106 cycles

Progressive starters, APR:

Series Skillair, ONE
10 x106 cycles
Pressure switches series PS 5 x106 cycles
MRF and RFL 50 x106 cycles
VSR 50 x106 cycles
VNR 50 x106 cycles
STP 50 x106 cycles
VCS 50 x106 cycles
VOR 50 x106 cycles
Pneumatic logic 50 x106 cycles

Concesio, 23rd December 2009

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  LAST RELEASE: October 2011




Metal Work S.p.a. - SocietÓ a socio unico - via Segni, 5-7-9 25062 Concesio (Brescia) - Italy
Tel +39 030 218711 Fax +39 030 2180569 - metalwork@metalwork.it
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