SIL Approved Actuators from Zoedale

SIL (Safety Integrity Level) is a measure of safety level in an industrial environment

SIL (Safety Integrity Level) is a measure of safety level in an industrial environment

SIS system diagram

SIS system diagram


Zoedale is the UK value added reseller (VAR) of Bernard high quality electric actuators and can now announce that these actuators can be compliant in a SIL safety system.

SIL started out in 1998 as a series of standards known as IEC 61508 (“Functional safety for safety-related Electrical/ Electronical /Programmable Electronics”) and in 2003 after a few alterations they have become the SIL regulations of today. SIL (Safety Integrity Level) is a measure of safety level in an industrial environment, which is based on the level of security provided by a measure of risk. Regulatory, societal and economic pressures all contributed to the development of the SIL safety standards. In a SIS (Safety Instrumented System) there is one or more safety instrumented functions (SIF) the typical structure of a command chain includes sensors, actuator and the item being actuated (valve for example).

The most common SIS (Safety Integrated System) application within Bernard’s speciality is an ESD (Emergency Shut Down) command chain (pictured right). In a SIS there are several safety instrumental functions (SIF) which can be categorised as one of the following: sensors that measure, PLC’s that treat and command, and a safety device that operates components. Each SIF has its own SIL level; the combination of all these levels determines the SIL capability of the system as a whole.

An actuator with SIL offers a high level of confidence and diagnostic capabilities and these can be measured in different ways:

The level of confidence can be measured in: PFD – the Probability of Failure on Demand or PFH – the Probability of dangerous Failure per Hour.

The level of diagnostic capabilities is defined as SSF – Safe Failure Fraction Zoedale supply several SIL compliant actuators these include:

Weatherproof:
Quarter-turn:
SQ Range
SQ20 to SQ80 (200 to 800 Nm)

Multi-turn:
ST Range
ST6 – ST220 (60 to 2200 Nm)
ASM Range
ASM 0 to ASM 3

ATEX Explosion proof:
Quarter-turn:
SQX Range
SQX18 to SQX80 (200 to 800 Nm)

Multi-turn:

STX Range
STX6 to STX 1400 (60 to 1400 Nm)
ST175 & ST220 (1750 to 2200Nm)

Zoedale Plc
Tel: 01234 832832
www.zoedale.co.uk


Published: 23rd September 2014

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