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PENN Controls Products Catalog

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9 Refrigeration Products Catalog Refrigerants and Product Material Compatibility Requirements such as material compatibility with refrigerants, refrigerant oils and other medias, system operating pressures and temperatures, and operating environment must be considered when selecting pressure controls, fan speed controls, water regulating valves and/or pressure transducers for HVACR applications. Table 1 provides a listing of the Penn products that are materially compatible with the most common commercially available refrigerants. As a standard practice, please review the applicable Penn product technical bulletin to confirm that the respective control's maximum working pressure is suitable for the refrigerant being used. In addition, you should confirm that the product's operating temperatures and enclosure are suitable for the intended application. Note: Controls used with flammable refrigerants typically require special construction and safety agency approvals including ATEX compliance. Selective Penn P77, P78, P100 and P599 series controls are ATEX compliant. The requirement for ATEX compliance and other safety agency approvals depends on the refrigerant and the application's explosion hazard zone. ATEX compliant controls are not always required when flammable refrigerants are involved. However, you should always check with the proper authorities to confirm the requirements.

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