Sanitary Tank Blanketing - Equilibar Precision Fluid Control
  • fr
  • de
  • ja
  • es
  • ar
  • ar
  • ar

Sanitary Tank Blanketing

low pressure gas control for sanitary blanketing processes

  • schematic of sanitary tank blanketing with FDO

In food and biopharmaceutical applications involving processing or storage tanks, it is sometimes beneficial to protect the tank contents using sanitary tank blanketing. An inert gas layer is maintained above the process media inside the tank to prevent reaction with air, oxidation or moisture contamination. It is sometimes called inerting because the blanket is an inert gas such as nitrogen.

The inerting pressure is very low, slightly higher than atmospheric, and is controlled by a tank blanketing valve which is often of sanitary design when used in food and biopharmaceutical processes. Sanitary tank blanketing valves can be made with USP Class VI materials or FDA approved materials depending on the process. An Equilibar FDO back pressure regulator (BPR) is a good fit for a sanitary tank blanketing valve. The schematic below shows how the FDO BPR would be installed for the inerting process.

schematic of sanitary tank blanketing with FDO

How an FDO sanitary valve works for tank blanketing

Nitrogen gas inside the tank will build pressure as the tank is filled with sanitary process media. The Equilibar back pressure regulator will relieve the tank pressure when it reaches the desired blanket pressure.

The Equilibar BPR is dome-loaded with pilot operation. This means that gas or air is fed into the top (dome) area of the regulator to provide the pressure setpoint for the process in a 1 to 1 ratio. The pressure of the gas in the dome is set by a secondary standard regulator called a pilot regulator. The pilot setpoint pressure determines the blanket pressure above the media.

During fermentation or other sanitary batch processing, the Equilibar sanitary BPR will maintain the precise blanket pressure and make adjustments if pressure changes due to temperature fluctuations. As the process medium is drawn down and moved to the next processing step, the Equilibar FDO valve adjusts instantaneously to allow nitrogen gas into the tank to maintain pressure at the precise setpoint given by the pilot setpoint regulator. Equilibar FDO back pressure regulators are easy to maintain and very precise at low pressures making them an excellent choice in this application. If the process does not require the use of sanitary valve, Equilibar has standard back pressure regulators equally as precise for tank blanket control.

Contact an Equilibar application engineer for more information.

FD Series Sanitary back pressure regulator ( product details)

Request a Quote Download Brochure

Work Categories
Equilibar News
Greg Rachkovsky

Team Member Profile: Greg Rachkovsky, Inventory Specialist

The Equilibar team is happy to introduce Greg Rachkovsky, inventory specialist for shipping and receiving, who joined us in the spring of this year. In addition to keeping up with thousands of parts and materials so that our production team always has what they need to fulfill orders, Greg enjoys cross training and helping with Read More

Read More