Fisher

Pneumatic Controllers Revived by Flexible, Configurable, Digital Process Controller

Pneumatic Controllers Revived by Flexible, Configurable, Digital Process Controller

Emerson’s Fisher Instruments has been producing its Wizard pneumatic controllers since the 1940s, refining and revamping them every 20 years or so. Along the way, the company produced its electro-pneumatic controllers, and more recently developed its Fisher™ FIELDVUE™ digital pneumatic controllers (DPC). In all, Emerson estimates there are more than 1 million of its pneumatic controllers presently operating.

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Three Steps to Maximize Your Next Outage with a Data-Driven Valve Maintenance Strategy

Three Steps to Maximize Your Next Outage with a Data-Driven Valve Maintenance Strategy

Planning for your upcoming planned outage can be aided by this report. If an unanticipated outage occurs, you can review the most recent report to find out which valves might need to be fixed. When planning for the next outage, you will have a priority ranking of valves based on which are the most critical to be serviced. As a result, you can properly prepare for the extent of service and the parts required for the outage. If you are able to complete the planned valve service scope early, you will already know which valves to examine that are second most important to be serviced. Most importantly, you can prevent opening and removing valves that are not in need of maintenance during a planned maintenance event.

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Improve LNG Operations with Optimized Joule-Thomson Control Valves

Improve LNG Operations with Optimized Joule-Thomson Control Valves

Control valves in liquified natural gas applications must operate reliably under high pressure and cryogenic temperatures to achieve gas separation and liquification. This is especially true for the main cryogenic heat exchanger (MCHE), where the closely-coupled Joule-Thomson (J-T) control valves feeding the MCHE help optimize operation of the most critical area in the entire process.

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Cutting Control Valve Noise

Cutting Control Valve Noise

The modal attenuator consists of a series of carefully engineered resonant cavities to provide sound reduction across a wide spectrum of frequencies. The full-bore design allows unrestricted flow, and internal drain channels drain off condensate which could build up in the device and reduce performance. Installed just downstream of the valve, the modal attenuator achieves an overall sound reduction up to 15 dBa, while creating no restriction in flow capacity whatsoever. The device can be used on existing valves or paired with a low noise control valve to achieve even higher levels of noise reduction. Unlike diffusers or silencers, the modal attenuator works consistently across a wide range of flow rates.

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