If these tanks are not full then, to prevent oxidation, you need to put a 'blanket layer' of CO2 gas (from a cylinder) over the liquid; CO2 is heavier than air. I can supply a ZERO Pressure Controller for automatically supplying CO2 to the airspace at the top of a tank. Speidel:
Type FS-MO stainless steel tanks, made in Germany.
1050 litres (1000 mm diameter, 1.785 m high) 1627 Euros + delivery from Germany at cost
Winegrowers Supplies
- Stainless Steel fixed capacity Tanks for fermentation and storage
Vertical cylinders, three legs, oval man-way door, concave top and bottom surfaces, V-channel to DIN50 bottom outlet, hole for flap-valve on racking outlet,
the top surface is AISI 316 higher grade stainless steel.
Many capacities/diameters/heights are available up to 20,000 litres, these are some examples:-
1250 litres (1000 mm diameter, 2.035 m high) 1769 Euros + delivery from Germany at cost
1300 litres (1200 mm diameter, 1.597 m high) 1867 Euros + delivery from Germany at cost
1400 litres (1000 mm diameter, 2.273 m high) 1993 Euros + delivery from Germany at cost
1550 litres (1200 mm diameter, 1.847 m high) 1944 Euros + delivery from Germany at cost
1800 litres (1200 mm diameter, 2.097 m high) 2069 Euros + delivery from Germany at cost
2000 litres (1200 mm diameter, 2.253 m high) 2337 Euros + delivery from Germany at cost
The above prices do not include these fittings:-
stainless steel butterfly-valve with sealing cap: DIN40 to DIN40 or 32-Mainz, 115 Euros
stainless steel butterfly-valve with sealing cap: DIN50 to DIN50 or DIN40 or 1¼" bsp or 2" tri-clamp, 115 Euros
stainless steel Gr.37/70 flap-valve with sealing cap, 80 Euros
level/sight-gauge, 259 Euros upwards according to size.
sample tap DIN10, 80 Euros
temperature gauge housing, with analogue thermometer, 111 Euros
Adjustable height feet, 52 Euros for each; 3 or more are needed, six on the very largest tanks.
Prices shown are exclusive of Vat.
Delivery will need to be charged at cost.