FAQ'S & Industry Blogs

Pneumatic Division FAQ'S AND INDUSTRY BLOG

Learn more about machine safety by reading our FAQ's and blog.

FAQ's

What if the performance level is not achieved?

Based on the calculations and process involved several options can be implemented to increase the performance level needed. Start by using components with a longer service life and B10d value. This will increase your MTTFd. Adding redundancy will increase your performance level and by increasing your ability to monitor with the proper components you can increase the diagnostic coverage of your controls system. If possible you can also reduce the frequency of switching cycles (Nop).

What makes a product a safety component?

A product is deemed to be a safety component under the terms of the Machinery Directive when it is tested and verified to provide specific safe function for a given period of time at a given state. It must bear the CE mark for Europe and receive independent certification.

What is the difference between a safety component and a safety related part of a control system (SRP/CS)?

Any fluid power component can be used in the safety related part of a control system to provide safe function. A safety component is tested and verified to provide specific safe function for a given period of time at a given state.

Can I use the PLr as my PL?

The main difference is PL accounts for the ability to detect faults (diagnostic coverage), the quality and service life of the components (MTTFd) and the ability of the components to withstand conditions on/in the machine (CCF). The PLr only looks at the risk and not at the control system. Therefore, PLr cannot be assumed to be the same as PL.

If I’m not in Europe am I required to comply with the Machinery Directive?

Yes, if you are shipping into the European market. You must comply fully with the Machinery Directive requirements. If you are not shipping into Europe, then you must follow the local laws and standards that you will find align closely to those of the EU.

Can I conduct my own risk assessment?

Risk assessment must be conducted by an individual either within your organization capable of evaluating a machine that has not been involved in the machinery design. If you do not have an individual like this on staff then third party services must be selected to perform this function.

What is partially completed machinery?

Partially completed machinery refers to an assembly that is almost a full system but cannot in itself perform a specific application for function. It is intended to be incorporated into, or assembled with, other machinery or partially completed machinery. Partially completed machinery:

• Consists of several parts, at least one of which is moving

• Is fitting with or intended to be fitted with a drive system

• Cannot by itself perform a specific application

• Is to be incorporated into partially completed or completed machinery.

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Parker Hannifin Corporation

Pneumatic Division North America

8676 E M-89

Richland, MI 49083

269.629.5100