Danfoss Product Reliability Data (MTTF) Application guide
Functional Safety
Product Reliability Data (MTTF) for
H1P069-280
www.danfoss.com
Functional Safety
H1 Pumps 069-280 Product Reliability Data
Revision history Table of revisions
Date Changed Rev
April 2021 Changed document number from '70086000' to 'AB159286485026' and added H1 280
information
May 2015 Added CCO information CB
April 2014 Danfoss layout CA
May 2013 Revise Functions - EC1035798 B
August 2012 First edition - EC1014364 A
0204
2 | © Danfoss | April 2021 AB159286485026en-000204
Functional Safety
H1 Pumps 069-280 Product Reliability Data
Contents
Reliability Data (MTTF)
Danfoss Component
H1 Pumps............................................................................................................................................................................................ 5
Intended Use......................................................................................................................................................................................5
Introduction........................................................................................................................................................................................5
Results...................................................................................................................................................................................................5
Mission Time.......................................................................................................................................................................................6
Standards and Assumptions
Standards.............................................................................................................................................................................................7
Criteria.............................................................................................................................................................................................7
Component Information and Calculations
MTTFd Individual Pump Functions.............................................................................................................................................8
F1: Safe Controllability (Pump at Demanded Displacement)...........................................................................................8
F2: Safe Stop (Pump to Neutral)..................................................................................................................................................9
F3: Prevent Unexpected Movement....................................................................................................................................... 10
F4: CCO Function............................................................................................................................................................................10
F5: Safe Start.................................................................................................................................................................................... 10
F6: Safe/Correct Direction of Rotation/Movement (Hydraulic Motor/Cylinder)..................................................... 11
References
List of References........................................................................................................................................................................... 12
©
Danfoss | April 2021 AB159286485026en-000204 | 3
Functional Safety
H1 Pumps 069-280 Product Reliability Data
Reliability Data (MTTF)
Transfer of Mean Time to Failure (MTTF) data for the given product from Danfoss to the appropriate party.
This Mean Time to Failure (MTTF) data has been compiled by the Business Area engineering team
responsible. These are professionals at Danfoss, who have the authority and technical knowledge to
calculate the MTTF Data for this product based on the standards set in place by both the industry and/or
Danfoss.
The purpose of this document is to assist in the transfer of MTTF data for the given product from Danfoss
to the appropriate party in a way which will result in a clear understanding and documentation on how
we derived it.
This MTTF data is provided to assist in calculating the overall MTTF of a complete or partially complete
piece of machinery. Danfoss cannot be held responsible for the suitability of these calculated MTTF
values for use in the calculation of the overall machinery MTTF values.
The MTTF values are based on a specific machine use, operating environment, and/or duty cycle as stated
by the standards set in place by both the industry and/or Danfoss.
This communication along with any attached Danfoss drawings, sketches, or data is transmitted in
confidence. No information stated in this document or any attachments or supplements may be
reproduced or disclosed in whole or in part without written permission of Danfoss. Further, neither these
documents nor any attachments are a warranty of any sort by Danfoss or a guarantee of machine
suitability for its intended purpose. It remains the responsibility of the machine manufacturer to ensure
overall machine functionality and overall machine safety.
4 | © Danfoss | April 2021 AB159286485026en-000204
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