Category Archives: Spunding Valve

Use CO2 Produced by Fermentation to Purge Serving Kegs, Carboys & Fermenters

Use CO2 Produced by Fermentation to Purge Serving Kegs, Carboys & Fermenters

A Spunding Valve allows you to maintain a set pressure. If pressure in the vessel exceeds the set point, it is expelled. It generally consists of an adjustable PRV valve, a tee, a gauge and a way to connect to your keg.


Why a Spunding Valve?

There are loads of homebrew related applications for a Spunding valve ranging from pressurized ferementation to naturally carbonating to fixing over carbonated beers and lots more.  Check out our resource post on the subject.  It’s arguably the go-to resource on the Internet on the subject

Use CO2 Produced by Fermentation to Purge Serving Kegs, Carboys & Fermenters

This technique requires a BlowTie Spunding Valve.  Since the the BlowTie has a defined output port, you can use it to capture CO2 produced by fermentation.  The “out” side of the BlowTie is a DuoTight connection, just like the “in” side.  Use compatible EVABarrier tubing and fittings and you can route outgoing CO2 wherever you’d like.  The primary application I can think of for using this is to purge kegs, carboys and fermenters.  The pictured setup shows a 10 gallon keg converted to a fermenter.  The “out” side of the BlowTie is connected to the liquid out side of an empty keg.  That allows incoming CO2 to purge the keg from bottom to top.  The lid PRV valve for the receiving keg is open to allow pressure to vent.  Of course you could tee the “out” side and flush multiple kegs or vessels using the CO2 produced by a single fermenter.

Related: Hands on Review: Kegland DuoTight Fittings & EVABarrier Tubing!

This write-up is part of my Spunding Valve Resource Post – Jump To This Section

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Spunding Valve Parts List

spunding valve parts list

A Spunding Valve allows you to maintain a set pressure. If pressure in the vessel exceeds the set point, it is expelled. It generally consists of an adjustable PRV valve, a tee, a gauge and a way to connect to your keg.


Why a Spunding Valve?

There are loads of homebrew related applications for a Spunding valve ranging from pressurized ferementation to naturally carbonating to fixing over carbonated beers and lots more.  Check out our resource post on the subject.  It’s arguably the go-to resource on the Internet on the subject

Parts List

There are many ways to configure your Spunding Valve. Our Parts List Breaks down options and gives you a run down on what parts you’ll need.

This write-up is part of my Spunding Valve Resource Post – Jump To This Section

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Tips for Setting Spunding Valve Pressure

setting spunding valve pressure

A Spunding Valve allows you to maintain a set pressure. If pressure in the vessel exceeds the set point, it is expelled. It generally consists of an adjustable PRV valve, a tee, a gauge and a way to connect to your keg.


Why a Spunding Valve?

There are loads of homebrew related applications for a Spunding valve ranging from pressurized ferementation to naturally carbonating to fixing over carbonated beers and lots more.  Check out our resource post on the subject.  It’s arguably the go-to resource on the Internet on the subject

Setting Spunding Valve Pressure

When setting desired pressure… start higher than your desiged set point and slowly work your way down.  As the valve gets close to where it is going to eventually settle, it slows down the release of gas.  Working your way slowly down, helps you hit your desired pressure without passing it (going too low).

cln_img_9929Here I’m dialing in my desired pressure.  Also pictured: Thermapen Mk4 [Review].

This write-up is part of my Spunding Valve Resource Post – Jump To This Section

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Fix Over-Carbonated Beers with a Spunding Valve

A Spunding Valve allows you to maintain a set pressure. If pressure in the vessel exceeds the set point, it is expelled. It generally consists of an adjustable PRV valve, a tee, a gauge and a way to connect to your keg.


Why a Spunding Valve?

There are loads of homebrew related applications for a Spunding valve ranging from pressurized ferementation to naturally carbonating to fixing over carbonated beers and lots more.  Check out our resource post on the subject.  It’s arguably the go-to resource on the Internet on the subject

Fix Over-Carbonated Beers with a Spunding Valve

A Spunding Valve can assist with fixing over-carbonated beer.

  • Determine your desired pressure based on temperature and desired carbonation using a carbonation chart.  See: Balancing Your Draft System for a carbonation chart.
  • Pressurize the keg to just over your desired final pressure.
  • Attach the Spunding Valve
  • Slowly dial down the pressure until you achieve your desired pressure – More about setting pressure
  • The Spunding Valve allows excess pressure to vent until the new carbonation level is achieved.
  • You can periodically agitate the keg to fix carbonation more quickly.

This write-up is part of my Spunding Valve Resource Post – Jump To This Section

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Naturally Carbonating in Your Fermenter with a Spunding Valve

A Spunding Valve allows you to maintain a set pressure. If pressure in the vessel exceeds the set point, it is expelled. It generally consists of an adjustable PRV valve, a tee, a gauge and a way to connect to your keg.


Why a Spunding Valve?

There are loads of homebrew related applications for a Spunding valve ranging from pressurized ferementation to naturally carbonating to fixing over carbonated beers and lots more.  Check out our resource post on the subject.  It’s arguably the go-to resource on the Internet on the subject

Naturally Carbonating with a Spunding Valve

Carbonation directly in your keg allows you to naturally carbonate your beer (saving CO2 and $) while maintaining reasonably tight control on carbonation levels.  This could be done by adding priming sugar, capping fermentation prior to the completion of fermentation or more traditional krausening (adding wort back to the fermenter).

Basic Steps for Carbonating in a Keg Using a Spunding Valve:

  • Ferment in a pressure capable fermenter. A 5 gallon keg works for small batches. Other options are available for larger batches including this like 10 gallon kegs.
  • Prime the keg with your choice of priming sugar or wort (or start this process late in fermentation when some fermentable sugars remain)
  • Determine your desired pressure based on temperature and desired carbonation using a carbonation chart.  See: Balancing Your Draft System for a carbonation chart.
  • Pressurize the keg to just over your desired final pressure.
  • Attach the Spunding Valve
  • Slowly dial down the pressure until you achieve your desired pressure – More about setting pressure
  • Wait.  As the remaining simple sugars are fermented, carbonation occurs and excess CO2 will be expelled from the spunding valve giving you just the right amount of carbonation.  I give it a couple days after reaching target pressure.  If you’re less sure how much fermentable sugar remained, I would suggest giving it a few days longer.
  • Chill your keg, allowing your beer to absorb head space CO2 and reach equilibrium.

cln_img_0112
This is a 2.5 gallon batch of beer that I fermented and naturally carbonated all in a 5 gallon keg.  I poured this immediately after it was transferred from the fermenter keg into a serving keg.

This write-up is part of my Spunding Valve Resource Post – Jump To This Section

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Measureman Digital Pressure Gauge + Spunding Valve Build

Measureman 2-1/2" Dial Size Digital Air Pressure Gauge with 1/4'' NPT Bottom Connector and Protective Boot, 0-60psi, Accuracy 1%, Battery Powered, with LED Light

Measureman 2-1/2″ Dial Size Digital Air Pressure Gauge with 1/4” NPT Bottom Connector and Protective Boot, 0-60psi, Accuracy 1%, Battery Powered, with LED Light

More Info

From the product description, check product page for current description, price and availability:

  • 1. HIGH ACCURACY: Performance tested & certified accurate to ±1% (Relative Humidity Temperature 25°C) with display resolution of 0.1 psi; FOUR different measuring units to choose: 3.5~ 60 PSI, 0.241 ~ 4 BAR, 0 .241~ 4 KGF /CM², 24.1~ 400 KPA.
  • 2. BATTERY SAVING: Power by 2 x LR03 AAA 1.5V (Included in the package). After measuring, the pressure gauge will turn off automatically after 150s of inactivity to preserve battery life.
  • 3. HIGH QUALITY, shock resistance, vibration resistance and durable.
  • 4. WIDE APPLICATION for measuring gas and air pressure. It applies to these fields of pressure container, automation equipment, matching with laboratory equipment and all vehicles tires including heavy duty ones.

 

Note from HBF: For whatever reason this offering seems to periodically change. The one I’m intending to link to is a 2 1/2 dial with 1/4″ NPT that reads 0 to 60 PSI. It’s possible a different variation will show up.

A possible homebrew application for this is to use it as part of a Spunding Valve Build.   A Spunding Valve allows you to ferment under pressure, naturally and precisely carbonate in the keg, fix over-carbonated beers and lots more. See: [Build a Spunding Valve].

Measureman 2-1/2″ Dial Size Digital Air Pressure Gauge with 1/4” NPT Bottom Connector and Protective Boot, 0-60psi, Accuracy 1%, Battery Powered, with LED Light – note that multiple variations of this product may be available, as such a different version may appear at this link


Make sure the components you use are compatible and rated for your intended application.  Contact manufacturer with questions about suitability or a specific application.  Always read and follow manufacturer directions. prod:B07CXM3ZGT

Measureman Digital Pressure Gauge + Spunding Valve Build

Measureman 2-1/2" Dial Size Digital Air Pressure Gauge with 1/4'' NPT Bottom Connector and Protective Boot, 0-60psi, Accuracy 1%, Battery Powered, with LED Light

Measureman 2-1/2″ Dial Size Digital Air Pressure Gauge with 1/4” NPT Bottom Connector and Protective Boot, 0-60psi, Accuracy 1%, Battery Powered, with LED Light

More Info

From the product description, check product page for current description, price and availability:

  • 1. HIGH ACCURACY: Performance tested & certified accurate to ±1% (Relative Humidity Temperature 25°C) with display resolution of 0.1 psi; FOUR different measuring units to choose: 3.5~ 60 PSI, 0.241 ~ 4 BAR, 0 .241~ 4 KGF /CM², 24.1~ 400 KPA.
  • 2. BATTERY SAVING: Power by 2 x LR03 AAA 1.5V (Included in the package). After measuring, the pressure gauge will turn off automatically after 150s of inactivity to preserve battery life.
  • 3. HIGH QUALITY, shock resistance, vibration resistance and durable.
  • 4. WIDE APPLICATION for measuring gas and air pressure. It applies to these fields of pressure container, automation equipment, matching with laboratory equipment and all vehicles tires including heavy duty ones.

 

Note from HBF: For whatever reason this offering seems to periodically change. The one I’m intending to link to is a 2 1/2 dial with 1/4″ NPT that reads 0 to 60 PSI. It’s possible a different variation will show up.

A possible homebrew application for this is to use it as part of a Spunding Valve Build.   A Spunding Valve allows you to ferment under pressure, naturally and precisely carbonate in the keg, fix over-carbonated beers and lots more. See: [Build a Spunding Valve].

Measureman 2-1/2″ Dial Size Digital Air Pressure Gauge with 1/4” NPT Bottom Connector and Protective Boot, 0-60psi, Accuracy 1%, Battery Powered, with LED Light – note that multiple variations of this product may be available, as such a different version may appear at this link


Make sure the components you use are compatible and rated for your intended application.  Contact manufacturer with questions about suitability or a specific application.  Always read and follow manufacturer directions. prod:B07CXM3ZGT

Digital Pressure Gauge + Spunding Valve Build

Digital Low Pressure Gauge with 1/4'' NPT Bottom Connector and Rubber Protector by Uharbour, 0-60 psi, Accuracy 1%, Resolution 0.1psi

Digital Low Pressure Gauge with 1/4” NPT Bottom Connector and Rubber Protector

More Info

From the product description, check product page for current description, price and availability:

  • 1. HIGH ACCURACY: Performance tested & certified accurate to ±1% (Relative Humidity Temperature 25°C) with display resolution of 0.1 psi; FOUR different measuring units to choose: 3.5~ 60 PSI, 0.241 ~ 4 BAR, 0 .241~ 4 KGF /CM², 24.1~ 400 KPA.
  • 2. BATTERY SAVING: Power by 2 x LR03 AAA 1.5V (Included in the package). After measuring, the pressure gauge will turn off automatically after 150s of inactivity to preserve battery life.
  • 3. HIGH QUALITY, shock resistance, vibration resistance and durable.
  • 4. WIDE APPLICATION for measuring gas and air pressure. It applies to these fields of pressure container, automation equipment, matching with laboratory equipment and all vehicles tires including heavy duty ones.

 

A possible homebrew application for this is to use it as part of a Spunding Valve Build.   A Spunding Valve allows you to ferment under pressure, naturally and precisely carbonate in the keg, fix over-carbonated beers and lots more. See: [Build a Spunding Valve].

Digital Low Pressure Gauge with 1/4” NPT Bottom Connector and Rubber Protector by Uharbour, 0-60 psi, Accuracy 1%, Resolution 0.1psi – note that multiple variations of this product may be available, as such a different version may appear at this link


Make sure the components you use are compatible and rated for your intended application.  Contact manufacturer with questions about suitability or a specific application.  Always read and follow manufacturer directions. prod:B07CXM3ZGT

Pressure Gauge – 0 to 60 PSI – by PIC Gauges + Spunding Valve Build

PIC Gauge S101D-254D 2.5" Dial, 0/60 psi Range, 1/4" Male NPT Connection Size, Bottom Mount Single Scale Dry Pressure Gauge with a Black Steel Case, Brass Internals, Chrome Bezel, and Plastic Lens

PIC Gauge S101D-254D 2.5″ Dial, 0/60 psi Range, 1/4″ Male NPT Connection Size, Bottom Mount Single Scale Dry Pressure Gauge with a Black Steel Case, Brass Internals, Chrome Bezel, and Plastic Lens

More Info

From the product description, check product page for current description, price and availability:

  • Black Steel Case With Chrome Bezel
  • Brass Socket And Movement
  • Phosphor Bronze Bourdon Tube
  • Dry Non-Fillable
  • 3-2-3% Accuracy

From HBF: Make sure the components you use are compatible and rated for your intended application.  Contact manufacturer with questions about suitability or a specific application.  Always read and follow manufacturer directions.

 

A potential homebrew application for this is to use it as part of a Spunding Valve Build.   A Spunding Valve allows you to ferment under pressure, naturally and precisely carbonate in the keg, fix over-carbonated beers and lots more. See: [Build a Spunding Valve].

PIC Gauge S101D-254D 2.5″ Dial, 0/60 psi Range, 1/4″ Male NPT Connection Size, Bottom Mount Single Scale Dry Pressure Gauge with a Black Steel Case, Brass Internals, Chrome Bezel, and Plastic Lens – note that multiple variations of this product may be available, as such a different version may appear at this link


Also: Build a Spunding Valve

Eaton Weatherhead 3700X4 Brass 1/4″ Tee + “Cheapest” Spunding Build Option

Eaton Weatherhead 3700X4 Brass CA360 Fitting, Tee, 1/4"NPT Female

Eaton Weatherhead 3700X4 Brass CA360 Fitting, Tee, 1/4″NPT Female

More Info

From the product description, check product page for current description, price and availability:

  • Adapts 1/4″ NPT female end to two 1/4″ NPT female ends at 90-degree angles
  • Brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability
  • For use with LP and natural gas, refrigeration, and hydraulic applications
  • Country of Origin: China

 

Of course you could use these fittings in lots of different applications.  One possible application is a Spunding Valve build.  A Spunding Valve [See: Spunding Valve Resource Post] allows you to ferment under pressure, naturally and precisely carbonate in the keg, fix over-carbonated beers and more.  A similar (different manufacturer and possibly specs) fitting is featured in our “Cheapest” Spunding Valve Build Option

Eaton Weatherhead 3700X4 Brass CA360 Fitting, Tee, 1/4″NPT Female – note that multiple variations of this product may be available, as such a different version may appear at this link


Also Consider:


Make sure the components you use are compatible and rated for your intended application.  Contact manufacturer with questions about suitability or a specific application.  Always read and follow manufacturer directions. prod:B07BXDHRQG