Harvest Right | Pressure Relief Valve

Harvest Right

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Regular price
$47.99
Regular price
$49.95
Sale price
$47.99

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  • Allows clean air to come into the freeze dryer when the pressure is released. Doesn’t use the drain valve.
  • Easy access: this valve connects to the side of the freeze dry at the same location where the vacuum hose connects.
  • High quality, heavy duty stainless steel
  • No danger of water being pulled from the drain bucket into the freeze dryer.
  • Ideal for Pharma and Scientific customers who are processing delicate products.

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Questions & Answers

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  • Is the pressure release valve used in conjunction with the drain hose on the opposite side of the machine? If so, what is the order of releasing the two valves? In other words how do I use it?

    The pressure release valve is used to equalize the pressure between the freeze dryer chamber and the external environment.

    - You open the pressure release valve to release the vacuum inside the chamber, which allows you to safely open the freeze dryer door after a cycle is complete.

    - The pressure release valve must be closed to maintain a vacuum during the freeze-drying process.

    Here's how you should use the two valves:

    1. Pressure Release Valve: At the end of the freeze-drying cycle, before you open the door of the freeze dryer, you should first open the pressure release valve. This valve is used to equalize the pressure inside the freeze dryer chamber with the atmospheric pressure outside, allowing you to safely open the door without a rush of air that could disturb the dried contents.

    2. Drain Valve: After you have opened the pressure release valve and the door, and have removed your freeze-dried goods, you may proceed to defrost the freeze dryer. Once the ice built up on the walls of the freeze dryer has melted, you use the drain valve to remove the water from the chamber. The drain valve is typically opened after the defrost cycle is complete and the chamber needs to be drained of melted ice (water).

    In summary, open the pressure release valve first to release the vacuum pressure, then open the door to your freeze dryer. After completing your freeze-drying process and defrosting, if necessary, use the drain valve to remove any liquid from the chamber.