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Currently, a popular fermentation lock that mounts on top of the fermentation vessel is the three-piece fermentation lock. Other models contain three bulbous chambers allowing for a broader range of pressure equalization. These bulbous fermentation locks were generally made of hand blown glass and are nowadays often made of clear plastic.
A simple valve seal depressing tool and a screwdriver with a 1 ⁄ 8 inch (3.2 mm) diameter shaft must be used to release the safety catch. See "How to remove a Miller threaded keg valve (not retained by a spiral ring)". The safety catch prevents the valve from releasing under pressure. [citation needed]
Fermentation locks, such as those used in alcohol brewing, are a type of airlock which allow gases to escape the fermentation vessel while keeping air out. Parachute airlocks are necessary because airfoil collapse due to depressurization can result in dangerous loss of altitude.
A swan neck flask, also known as a gooseneck flask, is a round-bottom flask with a narrow s-shaped tube as its opening to reduce contact between the inner contents and external environment. The motion of air through the tube is slowed and aerosolized bacteria or other particles in the air tend to become trapped by moisture on the tube's inner ...
A pear-shaped Schlenk flask. The flask's sidearm contains a greased stopcock valve, and the flask is capped with a Suba•Seal septum that has not been turned down. The standard Schlenk flask is a round bottom, pear-shaped, or tubular flask with a ground glass joint and a side arm.
The temperature of the fermentation medium is maintained by a cooling jacket, coils, or both. Particularly exothermic fermentations may require the use of external heat exchangers. Nutrients may be continuously added to the fermenter, as in a fed-batch system, or may be charged into the reactor at the beginning of fermentation.
Valve sealing: A bellows is used between the housing and the valve stem to seal the inside completely from the outside world. In Europe, this is of particular importance as regulations such as TA Luft prohibit any leakage. Couplings for stepper motors and servomotors: The flexible part, capable of compensating for misalignment is made by a ...
U-shaped tubes heat exchanger Spiral heat exchanger Covered gas vent Curved gas vent Air filter: Funnel or tundish: Steam trap: Viewing glass Pressure reducing valve: Valve: Gate valve: Control valve: Manual valve Check valve: Needle valve: Butterfly valve: Diaphragm valve: Ball valve: Check valve: Back draft damper Bag Gas bottle: Globe valve ...