Actuator Working Group

Peter Hirst, Rotork Controls

Peter Hirst, Rotork Controls

The BVAA Actuator Working Group, in conjunction with BSI - PSE18/5 (actuators), met in October 2017 in the offices of Rotork UK in Leeds. Subjects discussed included European and International standards developments and the applicability of IEC 61508 (Functional safety ) to mechanical devices such as valves, gearboxes and mechanical actuator components and systems.

Functional safety – “SIL” for mechanical devices and systems
The working group discussed a proposal made to ISO/TC153 (valves/ actuators) regarding functional safety standard IEC 61508 and specifically the reliability assessment for mechanical devices. IEC 61508 addresses electric, electronic and programmable electronic components whose reliability measures tend to come from component databases. Such databases do not exist for mechanical devices and so transferring the standard’s methodology to classification of mechanical components/systems is problematic. The proposal, led by Germany, is for the development of an ISO document specific to mechanical “final elements.” Our working group’s conclusion is in agreement and is generally supportive of the proposal. We will actively feed into any development work at ISO.

European standards activity (CEN)
Working group members along with the BVAA Technical Consultant attended several meetings of CEN/TC 69/WG 1 ‘Basic Standards’ and CEN/TC 69/WG 1/SG 10 ‘Actuators’ in 2017.

Current CEN standard development includes work developing prEN 15714-6 ‘Industrial valves – Actuators - Part 6: Linear pneumatic and hydraulic actuators’ and WI 69189 ‘Industrial valves — Gearboxes for industrial valves.’ As a working group and UK experts, we continue monitoring and actively providing input.

The preliminary work item PWI 00069187, to harmonise the EN15714 series with ISO 12490 ‘Petroleum and natural gas industries — Mechanical integrity and sizing of actuators and mounting kits for pipeline valves’ has now been cancelled. The reason being that actuator experts believed there to be no significant conflicts or overlap.

International standards activity (ISO)
Working group members along with the BVAA Technical Consultant attended several meetings of ISO TC153/WG1 - Basic Standards & ISO TC153/SC2 – Actuators in 2017.

Standards under development include a gearbox standard, PWI 00069189 and an Electric actuator standard, ISO 22153. As CEN are also developing a gearbox standard and are nearing completion of a final draft, it has been agreed that ISO experts will consider the CEN draft. Similarly, EN15714-2 ‘Electric actuators’ is published and current and it has been agreed by ISO experts to be the basis of their work.

2018 activity
As CEN and ISO standardisation continues apace, more meetings will be convened in 2018. BVAA experts will continue to attend and the WG, as a whole, will provide valuable support and input. Our working group will aim to meet twice this year, dates to dovetail if possible with CEN and ISO milestones. Dates will be announced in due course, probably late spring and autumn. The potential opportunity to develop a more appropriate means for the assessment of mechanical device reliability/availability provides an interesting and exciting challenge. It will remain a major topic for our working group.

As ever, I very much welcome any input, your contribution or attendance in our 2018 meetings.


Published: 26th March 2018

BVAA Strengthens Board with New Members

Rachel Wormald, Managing Director at YPS Valves Ltd and Elizabeth Waterman, ...

Share on Twitter Share on LinkedIn Read full article

BVAA Valve & Actuator Training News

Are you looking for industry-leading, brand independent valve and actuator ...

Share on Twitter Share on LinkedIn Read full article

Comment by BVAA CEO Rob Bartlett

As can be seen from the photograph, clearly the resident birds at Bartlett ...

Share on Twitter Share on LinkedIn Read full article

Howco Group Invests £1 Million in Vertical CNC Turning Centres

Howco Group has unveiled its latest £1million investment, with the ...

Share on Twitter Share on LinkedIn Read full article

Allvalves: Fuelling Growth Through Customer Connectivity

In 2024, Allvalves is poised for an exciting year of growth and expansion, ...

Share on Twitter Share on LinkedIn Read full article

GMM Pfaudler - Introducing the Normag Brand to the BVAA Community

GMM Pfaudler Engineered Plastics & Gaskets are delighted to bring the ...

Share on Twitter Share on LinkedIn Read full article

Building Industry Connections: A GMM Pfaudler Success Story

In the ever-evolving valve industry, GMM Pfaudler stands out for its ...

Share on Twitter Share on LinkedIn Read full article

SAMSON Controls Participates in the UK CCUS and Hydrogen Decarbonisation Summit

SAMSON Controls Ltd – part of the SAMSON group - a renowned leader in ...

Share on Twitter Share on LinkedIn Read full article