CryoPro FAQ

Explanation

The pressure relief valve controls the operating pressure of the unit. As the liquid nitrogen in the bottle is kept at its boiling point, the liquid nitrogen will constantly evaporate for as long as there is still liquefied gas in the bottle. This evaporation leads to internal pressure build-up, which is kept at a constant and safe level by the pressure relief valve. Once the internal operating pressure is reached (within a few minutes after filling the unit), the pressure relief valve will vent (“leak”) excess pressure, which is associated with a weak and hissing sound.

Fix

None! The sound is normal and presents no problem. NEVER TRY TO BLOCK OR OTHERWISE MANIPULATE THE PRESSURE RELIEF VALVE!

OBS!!

An excessive amount of gas escapes from the pressure relief valve, which is associated with a hissing sound louder than normal. The unit empties itself quickly.

Explanation

The vacuum in the bottle has deteriorated. Pressure relief valve OK.

Fix

Bottle replacement necessary.

Explanation

A “cold spot” indicates direct thermic contact between the inner and outer bottle. It may be the result of mechanical damage (visible or invisible). Pressure relief valve OK.

Fix

Bottle replacement necessary.

Explanation

On its way from the bottle to the spray aperture the liquid nitrogen boils violently. For small apertures (size C and D) this will cause an intermittent spray (“spitting”), however, it will not have any adverse effect on the treatment. In Apertures A and B this phenomenon will hardly be noticeable.

Fix

None! “Spitting” is normal and presents no problem.
Explanation

Spray apertures may clog – the smaller ones C and D more easily than A and B. Clogging is a result of impurities or ice crystals accumulating in the storage tank or in the bottle itself.

Fix

A spray tip Cleaning Adapter is part of the standard kit of accessories. Follow enclosed instructions.

Prevention

Clean the CryoPro can: fill it with warm water and a few drops of dish soap, clean with a soft brush, empty and dry the bottle thoroughly.

- Do not leave the CryoPro open when empty. Leave the top on.

- Clean the storage tank regularly: empty it completely before refilling. Use a vacuum cleaner for 20 – 30 min. to create air circulation in the empty tank to dry out water from melting ice crystals (the hose should be positioned approx. half ways into the tank).

Explanation

Clogging of the main valve is a result of contamination of the storage tank or the bottle itself.

1) Would normally be caused by and accumulation of impurities or ice crystals. 2) strongly indicates water/ice in the valve.

Fix

Return the unit for thorough cleaning of the main valve.

Prevention

- Clean the CryoPro can: fill it with warm water and a few drops of dish soap, clean with a soft brush, empty and dry the bottle thoroughly.

- Do not leave the CryoPro open when empty. Leave the top on.

- Clean the storage tank regularly: empty it completely before refilling. Use a vacuum cleaner for 20 – 30 min. to create air circulation in the empty tank to dry out water from melting ice crystals (the hose should be positioned approx. half ways into the tank).

Explanation

Clogging of the main valve is a result of contamination of the storage tank or the bottle itself.

1) Would normally be caused by and accumulation of impurities or ice crystals. 2) strongly indicates water/ice in the valve.

Fix

Return the unit for thorough cleaning of the main valve.

Prevention

- Clean the CryoPro can: fill it with warm water and a few drops of dish soap, clean with a soft brush, empty and dry the bottle thoroughly.

- Do not leave the CryoPro open when empty. Leave the top on.

- Clean the storage tank regularly: empty it completely before refilling. Use a vacuum cleaner for 20 – 30 min. to create air circulation in the empty tank to dry out water from melting ice crystals (the hose should be positioned approx. half ways into the tank).

OBS!

Lift the top of the pressure relief valve to distinguish between a clogged main valve (see above) and loss of pressure.

Explanation

Pressure loss may be caused by 1) a missing gasket in the top cover or 2) manipulation of the locked adjustment screw in the pressure relief valve (requires a wrench, a screw driver and application of excessive force. May be indicated by tool marks on the brass top).

Fix

1) Inspect the top cover. Request a replacement gasket if the red silicone gasket inside the cover is missing.

2) Return for repair.

Explanation

The valve stem has become “dry”.

Fix

Lubricate the valve stem with a tiny drop of silicone oil or WD 40. Apply the oil between the valve stem and the valve housing right under the trigger handle. Activate and turn the trigger handle several times after application to distribute the oil.

OBS! Do not apply more than a tiny drop of oil. An excessive amount of oil may cause the valve to freeze up and stick open.

Explanation

Over time the brass thread on the bottle may become dry.

Fix

Lubricate with a few drops of silicone oil or WD 40.

Explanation

The unit is empty and needs to be refilled while pressurized.

Fix

Unscrew the top cover ccw. one half turn. Wait ½ - 1 minute for the bottle to depressurize, then fully unscrew the top. Refill and remount the top.