BlowTie 2 Diaphragm Spunding Valve with Gauge

BlowTie 2 Diaphragm Spunding Valve with Gauge

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The Blow Tie Spunding Valve 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.

The BlowTie 2 features an integrated pressure gauge so you can quickly and easily dial in your pressure setting. The gauge is removable and can be swapped out with a gauge of a different pressure range.

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 too 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.
Set Up
The BlowTie spunding valve comes with 8 mm Duotight fittings on the inlet and outlet, and we recommend using it with EVABarrier 8 mm OD tubing (D1717 or D1718). You'll also need the flare Duotight fitting (DUO106) in order to attach it to a ball lock or pin lock disconnect. Dialing in your desired pressure is even easier with the BlowTie 2, thanks to the integrated pressure gauge. Simply start with the adjustment knob fully closed, then slowly open it until the gauge reading matches your desired pressure setting.
  • Made from food grade acetal
  • Stainless screws
  • Easily disassembles for cleaning
  • 8mm (5/16") Duotight fittings at both ends
  • Interchangeable pressure gauge
  • Gauge reads from 0-15 psi

WARNING: Do not exceed gauge pressure. Exceeding the pressure range will damage the gauge.

Kegland Part number: KL15042


Item # FE962
Shipping Eligible for Free Shipping Program
Availability California - In Stock
Pennsylvania - In Stock
Weight 0.02 LBS
Community Q&A

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Browse 3 questions Browse 3 questions and 31 answers
Why did you choose this?
MoreFlavor Store
Accurate, easy to clean
Brett C on Dec 2, 2021
Want to give it a try
Greg L on Nov 25, 2021
Accurate, easy to clean
Brett C on Dec 2, 2021
Fermenting under pressure, keeping back pressure on keg when racking
Peter Dietz on Dec 2, 2021
Want to give it a try
Greg L on Nov 25, 2021
trying pressure fermenting
Jeremy K on Oct 29, 2021
More compact the Previous Spunding valve
Scott G on Oct 8, 2021
I am going to use this to manage head pressure when transferring between kegs
Justin M on Sep 7, 2021
Best Deal
Todd P on Aug 9, 2021
outlet to purge keg
mortfrom on Jul 15, 2021
vent excess pressure during closed transfers/spunding in future
Antonio Martinez on Jul 2, 2021
pressurized transfers
Quinlan G on Mar 6, 2021
to use as a spunding valve
Valued C on Mar 5, 2021
I was building spunding valve and wanted to eliminate extra parts by having a built in gauge
Aaron W on Nov 17, 2020
It has the pressure gauge built in
Dean L on Nov 13, 2020
Michael N on Oct 10, 2020
I have this and wanted another, works very well so far
carl a p on Oct 6, 2020
online reviews say diaphragm spunding valves are superior to spring loaded. The combo at that price seemed a win/win
anthony r on Oct 2, 2020
want to know what pressure kegs are at in storage
wes m on Oct 1, 2020
I pair this with the fermzillas, ferment everything at 5 psi, with amazing results
Vlad C on Sep 16, 2020
Doing pressurized mead fermentations
Jose A on Sep 10, 2020
Ease of transfer
Jeff H on Sep 3, 2020
Pressure ferment in kegs
Jonathan S on Aug 11, 2020
Building my own multi trunk secondary regulator - needed to be able to set in-line regulators without gauges.
Thomas Parshall on May 20, 2020
To adjust natural carbonation.
Christopher A. B on May 17, 2020
A must for pressure fermenting
Darin E on May 14, 2020
The Homebrew Challenge youtube channel showed in a video
robert m m on May 12, 2020
Newest tech for pressure fermenting
Thomas McGloine on Apr 21, 2020
Fermenting under pressure, keeping back pressure on keg when racking
Peter Dietz on Dec 2, 2021
trying pressure fermenting
Jeremy K on Oct 29, 2021
I'd like to use pressure to bottle but ferment around normal air lock pressure. Is there a minimum effective operating pressure for this valve? Could it operate similar to a simple airlock?
David Schindler on Apr 24, 2020
BEST ANSWER: I’m going to try this also
Transferring to a SS keg for further aging and fermentation of wine
What is the range for operating temperature? Can it work with steam?
Duane Jenness on May 2, 2020
BEST ANSWER: Temperature rated to 212°F (100°C), so do not use with steam. Cheers!

3.4 / 5.0
9 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 2 out of 5
waste of money
First, these are not intuitive, you want them all the way loose to stop the flow, and tighten them down to allow flow. Second, the gauges never worked, I ran 20 psi to them, no flow, but no registering pressure either. all in all, a waste of money. Only gave it 2 stars because it does stop the flow, I just have to use another gauge to set the pressure.
November 25, 2021
Rated 5 out of 5
Good spunding value with 15 psi gauge. I believe the gauges can be changed out as needed.
June 25, 2021
6 months ago
Rated 5 out of 5
It’s spunding heaven
It’s a great product, easy to use and dial in the pressure you want.
October 31, 2020
1 year ago
Rated 2 out of 5
Was it my bad?
I wanted the Blow Tie with 30psi gauge on it, 15psi serves me no purpose.
October 22, 2020
1 year ago
Rated 5 out of 5
Kegland does it again
Kegland makes some cool devices. This is one of them. These are so much more accurate than the old style spunding valves.
October 7, 2020
1 year ago
Rated 2 out of 5
Good but was defective out of box: Found my own solution
I was looking forward to using the Blow Tie 2 for spunding the IPA I brewed last week. Hooked it up on day 3 of fermentation and got no reading. I checked the Duotight fittings and tubing and they seemed ok. I opened the valve completely and there was no CO2 flowing to the Star San jar. I sprayed the different connections with agitated Star San and found a leak on the "IN" side above the gauge. I wasted several lengths of tubing trying to find the issue. No luck. The next day I found a video from Kegland on how to clean the Blow Tie, so I took mine apart. I found it had a manufacturing defect on the 4 prong insert that locks the tube in place. One of the prongs was deformed and the little piece of wire that is attached to it was protruding and scratching the tubes. Simple fix: swap the OUT insert with the IN. Hooked up again and no leak and reads pressure. Holding pressure for 2 days now. I like it but it was a hassle getting it to work.
Holding pressure
Side view of defect and what prong should look like
Front view of defect
September 21, 2020
1 year ago
Rated 5 out of 5
Works great for me and my Fermenazilla
September 10, 2020
1 year ago
Rated 1 out of 5
Not working. Doesn’t hold pressure
Got this car a separate gauge to make a simple sounding valve with a CMB gas disconnect and the flat to push fit connector. Hooked up about a foot long piece of barrier tubing, charged a keg to 22psi since I planned to spund at 68F and popped my new spunding valve on. Valve read correct but within 10 minutes it was obvious I had a leak as the pressure dropped to 15psi. Tried the water test and got some bubbles from the area where the gauge is but figured out that’s an open box so water was just displacing air. Tightened everything up and still had a leak that I couldn’t find. Cut the tubing much shorter and made a precise effort to make sure the ending the tubing were as square as I could get them. Recharged to 22 psi and looked like it might hold but 12 hours later it’s at 15psi again so while things are better it’s still leaking. So basically it’s useless as is
May 26, 2020
1 year ago
Response from MoreFlavor
To determine if the spunding valve, or other components in your keg, are leaking can you put 22 psi in your keg, without spunding valve attached, and test it 24 hours later. It seems odd that the pressure leaked to 15 psi both times, but did so in 10 minutes one time and 24 hours the next. This would make us think there is a seal issue with the keg lid o-ring or body connect.
September 4, 2020
Malcolm lieban
Rated 4 out of 5
Great multi purpose tool
Great spunding valve for use during fermentation, pressure transfers, and keg pressure after rebuild of orings and poppets
Checking for pressure leaks in new Flex+
Testing keg pressure
May 24, 2020
1 year ago