BLOWTIE Diaphram Spunding Valve - Adjustable PRV

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The BlowTie Diaphram Spunding Valve - a great tool if you want to control the pressure retained in a pressure vessel that is releasing pressure. It has been designed for simplicity and ease of putting together. Many brewers use this spunding valve in combination with the FermZilla pressure rated fermenters.

This is the new "BlowTie 2" upgarded model which has the integrated pressure gauge. The adjustment knob on the top of the unit makes it easy to increase and decrease the set pressure. This BlowTie unit can be easily disassembled for cleaning using a screw driver. Designed to suit 8mm (5/16") tubing. It's compatible with both the 4mm ID Tubing or 5mm ID.

This compact solution for adjusting residual pressure in your fermenter makes pressure control easier than it's ever been. This can be used for compressed air, CO2, nitrogen, mains water supply and many other things but its primary use is to control the residual pressure inside fermenters.

1. Suits pressures 0-23psi (but with different gauges the unit can go above 100psi)
2. Made from food grade acetal
3. Stainless screws
4. 8mm (5/16") push on both sides

The design utilises the reliability of the Duotight o-ring system to make sure you can fit hoses to this unit quickly and with leak free connections.

Pressure Fermentations
With the popularity of pressurised fermentation it has become increasingly important to have a method of regulating and controlling this residual pressure from the fermentation process. The BlowTie has been designed specifically for this reason.

Pressure Transfers
When transferring from keg to keg, keg to bottle, or fermenter to keg it is often a good idea to have head pressure in the keg you are filling into especially if you are transferring a beverage that is carbonated. For this reason the BlowTie can consistently control this head pressure giving you more consistent results and without losing carbonation in the process.

Traditional spunding valves that use a simple spring against a seal are flawed right from the beginning as the physical aspects of the design dictate that you will have a significant difference between the opening pressure and closing pressure during operation. Brewers have tolerated this imperfection for long enough and now you can control these pressures far more accurately.

The BlowTie has been made completely differently taking advantage of a diaphragm to actuate the sealing mechanism that will release pressure from the pressure vessel with much more accurate control pressure.

Use the yellow adjustment knob to control the pressure coming out of the pressure vessel. Clockwise is higher pressure and anticlockwise is lower pressure. We would recommend gassing a keg to a known pressure e.g. 15psi then attach your BlowTie Kit to the keg and adjust to 10psi.

These gauges are accurate to about 10% of the range of the pressure gauge. So if you use the lowest range possible it will ensure the best possible accuracy.

IMPORTANT WARNING: Do not exceed gauge pressure. If you set a gauge pressure higher than the graduations on the gauge you can damage the gauge. (ie if you are using the 0-60psi gauge. Do not set pressure above 60psi or damage to the gauge may occur.)