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Reduce maintenance costs while ensuring intrinsic safety

Overfill protection in a Propylene Oxide (PO) chemical storage tank

A Midwest chemical plant serving the automotive and OEM market needed to replace an aging carbon steel horizontal cylinder bulk storage tank with a new stainless steel vertical cylinder bulk storage tank. The customer needed a solution from someone they trusted and that was experienced in dealing with safety. The customer selected Endress+Hauser based on a combination of past experiences, reduced equipment maintenance and price.

Overfill protection in Propylene Oxide (PO) chemical storage tank ©Endress+Hauser

Your benefits

  • Ensured explosion proof and intrinsically safe installation

  • Reduced maintenance costs

  • Ensured overfill protection

Customer challenge

The customer wanted to replace the existing capacitance device with radar. To prevent overfilling of the tank, Endress+Hauser recommended a tuning fork point level device also be installed. The customer needed to be able to test the instrument functionality without removing it from the tank.

Our solution

We installed a high level switch – Liquiphant FTL51 – to ensure overfill prevention in the customer’s propylene oxide (PO) storage tank. The Liquiphant was installed with an FEL57 electronic module and a Nivotester FTL325P to provide an intrinsically safe installation. The Liquiphant and Nivotester combination, which features a push-button to test the functionality, is SIL2 or SIL3 (with homogenous redundancy) capable in accordance to IEC 61508/IEC 61511 and ISA 84.0196 standards.