Complete N₂ System for Closed-Top Wine Tank $1050 in stock
Does NOT include N₂ cylinder

All components (except gas cylinder) needed to keep wine under N₂ blanket. Simply attach the system to 2" TriClamp ferrule on top of tank.

Wine tanks cannot be safely pressurized above ~2 psi. This system permits safe pressurization of wine tanks at ~0.5 psi.

• N₂ Vent
• Ultra-Low Pressure N₂ Regulator---you must use an Ultra-Low Pressure N₂ regulator. [Standard N₂ regulators cannot operate at the low pressure required.]
• Valves and Fittings.
  • Push-In valve and fittings for easy setup and gas-tight connections.
  • 2" TriClamp 90° Elbow, two 2" TC clamps and gaskets to connect to 2" TrClamp port on tank.
• Tubing: Includes 100' of tubing. Cut to desired length.
• N₂ cylinder NOT included---obtain a cylinder from your local gas supply.

Easy to add tanks to the system. One regulator can handle many tanks. One N₂ Vent can handle several tanks. Contact us with number of tanks, and distance between tanks, and we can setup complete system. As an example, a complete system for 6 tanks (one regulator and one N2 vent) will be ~$1750. A complete system for 3 tanks is ~$1400.

Click here for maintanence and setup prodecure.

Please note that the system does not include N₂ cylinder. It is best to get these from your local gas supplier.

N₂ Vent for Wine Tanks $240 in stock
1 psi Pressure Vent

Store wine under N₂ blanket.

• Pressure vents at 1 psi
• Vaccum break at 0.05 psi
• Maximum air flow rate is 125 GPM.
• Gas inlet port 1/8" FNPT (not shown in photo)
• 304 stainless steel.
• Must be mounted vertically as in photo.
• 2" TriClamp

Note the 3 ports. Top is pressure relief. Bottom is vacuum break (this is elevated when in use). Side port connects to tank---typically through an elbow. [There is a 4th port for N₂ gas line not shown in this photo, but can be seen in photo of system above).

Do NOT pump out tank, or fill tank, at greater than 125 GPM (unless you remove the N₂ Vent or open top hatch of the tank).

Click here for maintanence and setup prodecure.

Components

• Push-In Fittings
  • Male Connector 1/4" MPT x 1/4" tube $4.50
    on regulator
  • Mini-Valve (1/4" tube x 1/4" tube) $30
    on regulator
    
  • Male Swivel 90° Elbow. 1/8" MPT x 1/4" tube $6
    on N2 Vent
    
  • Y Connector. (tube to tube 1/4") $7
    use this if you add a tank.
  • Plug for Push-In Fitting 1/4" $2
  • Plug for Push-In Fitting 1/2" $2.50
  • Male Swivel 90° Elbow. 1/2" MPT x 1/2" tube $12
    Used to connect additional tanks to one N₂ Vent.
  • 1/2" MPT x 1/2"tube x1/2"tube TEE $18
    Used to connect additional tanks to one N₂ Vent.

How to Use Push-In Fittings
To connect tubing: Simply push the tubing into the fitting.
To Disconnect. Depress outer sleeve of fitting and pull tubing out.

• Tubing.

• 1/4" LDPE for Push-In fittings. $15/100' roll
  1/4" tubing connects regulator to N₂ Vent.
• 1/2" LDPE for Push-In fittings. $35/100' roll
  1/2" tubing connects two tanks to one N₂ Vent.
• TriClamp Fittings---see sanitary fittings page

Easy to add tanks to the system. One regulator can handle many tanks. One N₂ Vent can handle at least up to 4 tanks. Contact us with number of tanks, and distance between tanks, fittings on lid or top of the tanks, and we can setup complete system.

Ultra-Low Pressure N₂ Regulators

These regulators are designed for wine tanks in which the pressure MUST be regulated at very low pressure. Maximum pressure is 3 psi and the pressure can be precisely regulated to 0.3 psi.

Wine tanks are neither fabricated nor certified to withstand pressures in excess of a few psi. Standard single-stage N₂ regulators should NEVER be used to pressurize wine tanks because the upper pressure limit is too high. Click here for standard single-stage N₂ regulators.

In addition, tanks should have a safety release valve installed. The vent pressure should be 3 psi or less. [Please note that closed top tanks with a two-way air valve are fine because the air valve is a safety release valve.]

• Pressure Regulation 0.3-3 psi
• Attaches directly to N₂ (or Argon) cylinder.
• This is a two stage regulator. The first stage accepts pressure of the cylinder (as high as 3000 psi) and drops the pressure to ~40 psi. The second stage regulates the outlet pressure from 0.3-3 psi.
• Flow 43 GPM
• Outlet Valve included.

Regulators must be calibrated in the static phase.
Procedure to calibrate: Close the Outlet valve. Open the N₂ cylinder valve. (The pressure reading will be inaccurate.) Open and close the Outlet valve. (The pressure reading is now accurate.)

Dual Scale on Gauge. mbar in red, and mm H₂O is outer scale.
70 mbar ~ 1 psi. So typically set pressure to 40-50 mbar for wine tank. Note that the N₂ vent (at left) opens at 1 psi (70 mbar), so you must set the regulator below 70 mbar.

Replacement Gauges
Low Pressure $80
High Pressure $25

• 0.3-3 psi
• Wall mounted. Run feed line directly from N₂ (or Argon) cylinder to unit. Two inlets permit operating line and reserve. For large operations, place these units at 50' spacings to ensure proper pressurization along entire line of vessels.
• This is a two stage regulator. The first stage accepts pressure of the cylinder ( as high as 3000 psi) and drops the pressure to ~40 psi. The second stage regulates the outlet pressure from 0.3-3 psi.
• Outlet Valve included.

Overview of Tank Vents
All of these vents are Double Action:

• Vent under positive pressure inside the tank.
• Vacuum break (let air/gas into tank when tank is drained)

White Plastic Vents
Most common and inexpensive.

• Pressure vents at 0.05 psi
• Vaccum break at 0.05 psi
• Maximum gas flow rate is 57 GPM.
• White plastic
• Two marbles make seal against the plastic. One marble for vent, the other marble for vacuum.
• Includes top, backing nut and gasket. Fits thru hole in lid, back nut secures it.

The max gas flow is important when pumping out the tank. Be sure the flow rate matches or exceeds the pump speed.

Vent-211 with 2" Triclamp $65 coming soon
Includes the Vent-211 with stainless adapter to 2" TriClamp.

Safety Vent for High Pressure Tank (BEER)
15 or 35 psi pressure release

10-15 psi Safety Vent $160 in stock
30-35 psi Safety Vent $160 in stock

• Pressure vents at 15 or 35 psi
• Vaccum break at 0.1 psi
• Maximum air flow rate is 100 GPM.
• 304 stainless steel.
• 2" TriClamp

Extra Springs--Change a 15 psi Vent to a 35 psi by simply changing the spring.
15 psi spring $8
35 psi spring $8
These springs work only with St. Patrick's Safety Vents

This vent CANNOT be used on a wine tank. Wine tanks will be destroyed at pressures much lower than 15 psi.

The max gas flow is important when pumping out the tank. Be sure the flow rate matches or exceeds the pump speed.

The maximum pressure release is 15 and 35 psi respectively. This can be reduced to 10 and 30 psi by turning the top one turn counterclockwise. A 3/8" drive (for sockets) is required to make the adjustment.

The max gas flow is important when pumping out the tank. Be sure the flow rate matches or exceeds the pump speed.

Vent-211 $30
Replacement vent only for Letina tanks.

• Standard on our Letina tanks.
• Easy to remove and clean
• Pressure vents at 0.05 psi
• Vaccum break at 0.05 psi
• Maximum gas flow rate is 125 GPM.
• Threads onto stainless tube.
• Grey plastic
• Springs force the plastic/plastic seal.

[This vent cannot replace the White Plastic--you must have the associated stainless pipe welded to the tank lid.]

The max gas flow is important when pumping out the tank. Be sure the flow rate matches or exceeds the pump speed.

Adapter to replace Vent-211 with N₂ system $45
Adapter to replace Vent-211 with N₂ vent. This is NOT an adapter to put a Vent-211 on a 2" Triclamp port. 304 stainless. Includes gasket. Remove the Vent-211, attach this adapter, and then attach the N₂ Vent.

Replacement rubber Gasket $4

We set up the N2 systems in miniature----short lengths of tubing between components. This is to insure it will be very easy to understand how to put the system on your tank(s).

You simply need to replace the short lengths of tubing with appropriate lengths for your arrangement.

The tubing is connected with PUSH-IN FITTINGS. To release, depress the ring and pull out the tubing. Simply push the tubing in to connect.

Regulators must be calibrated in the static phase.

Procedure to calibrate: Close the Outlet valve. Open the N2 cylinder valve. (The pressure reading will be inaccurate.) Open and close the Outlet valve. (The pressure reading is now accurate.)

Dual Scale on Gauge. mbar in red, and mm H2O is outer scale
70 mbar ~ 1 psi. So typically set pressure to 40-50 mbar. Note that the N2 vent opens at 1 psi (70 mbar), so you must set the regulator below 70 mbar.

If you wish to understand how the vent works, I suggest the following.

1. Put a 2" end cap on the side arm of the N2 vent. You will then have a very simple system of N2 regulator with valve and N2 vent only.
2. Disconnect the tubing on the outlet side of the valve and calibrate the regulator as described above.
3. Connect the tubing to the valve. Now adjust pressure slowly up to ~100 mbar. At around 70-80 mbar you will hear the gas escaping thru the top of the vent.
   Back the pressure off to ~50 mbar and it will hold pressure for a very long time--we have demonstrated that a K cylinder (50 L) will last literally 1000 years with this simple arrangement.

Maintenance of the N2 Vent.
The N2 vent has a simple design that will operate flawlessly for a very long time. There are no springs or complicated seals so it is easy to maintain.

1. Periodically remove the top cover---it is simply a press fit over an oring.
2. Remove the top seal with red silicone gasket. Clean surfaces and gasket with mild detergent cleaner. Lubricate with any non corrosive lubricant.
3. To remove the bottom (vacuum) seal. Unthread the top part of the vent.
4. The bottom seal has long thin rod---remove and clean silicone gasket as above.

Two-stage regulators are intended to be used with Closed Top tanks, but not with Variable Capacity tanks.

The top hatch on closed top tanks can be tightly secured with the rubber gasket and latches. The tank can then be pressurized with N₂ and sealed tightly. N₂ should not be used with Variable Capacity tanks, aka tanks with Floating lids. The Floating lid with inflatable gasket is not designed to allow the tank to be pressurized. Furthermore, the Floating lid rests directly on the wine, with no headspace, thus negating the need for N₂. Ironically, installing a N₂ system on a Floating lid tank will almost certainly increase, not decrease, the oxidation of the wine. All N₂ cylinders have small amounts of O₂. Every time N₂ is introduced, a small amount of O₂ is also introduced. In a tightly sealed system (such as a Closed Top tank), the amount of N₂ needed over time is very small (and thus the amount of O₂ is very small). In this case, a nitrogen blanket is certainly useful in protecting the product from oxygen. On the other hand, a Floating Lid tank will not seal tightly under pressure. Thus the N₂, and O₂, introduced over time is much greater. In the extreme, you will oxidize your wine completely by continuously bubbling N₂ through it---because N₂ cylinders always contain a small amount of the limiting reagent O₂.