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Duotight BlowTie 2 | Complete Kit | Diaphragm Spunding Valve | Built-In Pressure Gauge | 0-15 PSI | 8 mm Duotight | Duotight Ball Lock Quick Disconnect (QD)
FE964

Duotight BlowTie 2 | Complete Kit | Diaphragm Spunding Valve | Built-In Pressure Gauge | 0-15 PSI | 8 mm Duotight | Duotight Ball Lock Quick Disconnect (QD)

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Item currently out of stock
Description

  • Automatically release pressure inside your fermenter during pressure fermentations
  • Regulate beer flow during pressurized transfers from fermenter to keg
  • Built-in pressure gauge for easy reference when adjusting the spunding valve
  • Pressure gauge is interchangeable—swap to different pressure ranges that better suit your application
  • Diaphragm spunding valves offer higher accuracy compared to spring & poppet spunding valves
  • Comes complete with Duotight ball lock QD and rigid joiner

With this complete kit you'll be ready to use the BlowTie 2 Spunding Valve right out of the box. The BlowTie is used to release excess pressure on a pressurized fermenter or from a receiving keg during pressure transfers. This diaphragm spunding valve is much more accurate than the spring and poppet style, and works much better at lower pressures.

This version of the Spunding Valve Kit includes the Duotight Ball Lock QD which allows you to attach the BlowTie directly to the QD via the 8 mm rigid joiner.

The BlowTie 2 can also be upgraded with a Digital Mini Pressure Gauge.

Pressure Fermentation
Pressure fermentation is becoming more and more popular at the homebrew level, but in order to do it safely and accurately, you need a way to release excess pressure. You'll pressurize your vessel to your desired psi, but once fermentation begins and those hungry, active yeast start creating CO2, the pressure inside the vessel will increase. Attach a spunding valve and set it to your desired pressure, and it will blow off when the pressure gets to high and close up again when it's back to your desired psi.

Pressure Transfers
Even if you don't have a pressurizable fermenter, you may have done pressure transfers from keg to keg during filtering or after fining. During pressure transfers, it's a good idea to have a bit of head pressure in the receiving keg, especially if you're transferring beer that is already carbonated. Having a spunding valve in place will allow you to consistently control the head pressure and give you more consistent results, without losing carbonation in the process.

Diaphragm vs. Poppet
With the poppet style spunding valve, a spring pushes against a poppet to keep the valve closed. When the poppet lifts up to open, the surface area the gas pushes against becomes larger, and the spring has to work harder to push the poppet down and reseal the valve. This can lead to more gas being released than intended, and the remaining pressure in your vessel may be at a lower psi than your spunding valve’s set psi. 

Instead of a poppet, the spring inside the BlowTie pushes against a diaphragm, which has an immensely larger surface area. This means the surface area that the gas pushes against while the diaphragm is closed is significantly closer to the surface area it pushes against when the diaphragm is open. This leads to higher accuracy, and the remaining pressure after excess gas is released will be much closer to your set blow off pressure.

Kit Includes:

  • BlowTie 2 w/ Integrated Pressure Gauge (0-15 psi)
  • 8 mm Duotight Gray Ball Lock Disconnect
  • 8 mm OD Rigid Plastic Joiner

 

Item # FE964
Shipping Eligible for Free Shipping Program
Availability Out Of Stock
Weight 0.37 LBS
Community Q&A

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Why did you choose this?
MoreFlavor Store
For pressure fermenting
Timothy J N on Feb 27, 2023
Pressure fermenting
Che Adams on Jan 12, 2023
For pressure fermenting
Timothy J N on Feb 27, 2023
to go with the fermzilla gen 3
Robert L on Feb 14, 2023
Pressure fermenting
Che Adams on Jan 12, 2023
affordable diaphragm valve for a beginner
Cory M on Jan 12, 2023
Curiosity
Greg B on Dec 21, 2022
Pressure Fermentation
Michael E on Dec 13, 2022
I need a Spunding valve for my new pressure fermentor.
Michael E. Brown on Nov 30, 2022
Good to have
Aaron F on Nov 27, 2022
Great device for pressure fermenting in a corny keg
Richard J DePas on Nov 16, 2022
to go with the fermzilla gen 3
Robert L on Feb 14, 2023
affordable diaphragm valve for a beginner
Cory M on Jan 12, 2023
Reviews

4.5 / 5.0
4 Reviews
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Rated 3 out of 5
Sounding valve good, gas connect not so good
5 stars for the spunding valve component but 1 star for the gas connect, which did not work with the 8 mm rigid joiners at all, even under a low amount of pressure.
February 4, 2024
Rated 5 out of 5
East to use
Easy and useful. I ferment in a keg and slap this in after peak fermentation is winding down. Gives a head start on carbonation. Also use on a second keg if transferring carbonated beer to prevent foamng.
March 15, 2023
Purchased
1 year ago
Rated 5 out of 5
Blowtie Valve Assembly
I added the Flow Stopper assembly to this since I intend on using it primarily as a keg to keg or fermenter to keg transfer system.
February 27, 2023
Purchased
12 months ago
Rated 5 out of 5
Very Pleased
Bought several others from other places that were cheaper, and had nothing but problems. I wish I would have just bought this one first. Works exactly as it's supposed to.
January 11, 2023
Purchased
1 year ago