Recently, one customer asked me one
professional question, why do you use two different vacuum pumps for vacuum
fryer. I also want to share this knowledge here.
As we all know, vacuum frying is finished
in reduced pressure condition. The frying time and temperature are related to
vacuum degree closely. If vacuumizing speed and vacuum degree higher, the
frying time will be shorter and frying temperature lower. On the contrary,
frying time longer and frying temperature higher.
Actually, the aim of using vacuum
technology in the field of food and snacks production, is to transform food
moisture from solid state to gas state directly and remove out quickly. Include
vacuum frying and vacuum freeze-drying technology. In the vacuum frying
process,
If the vacuumizing speed and vacuum degree
can not meet requirements, the moisture will only transform liquid state and
then go into oil, the frying time will be prolonged and the oil will be polluted.
This is also the cause why some clients told to me they had saw some water in
the exhaust pipeline. Normally, there is only vapour flowing there.
Thus, it is so important to adopt
reasonable pumps for vacuum fryer. Some factories just use circulating water
vacuum pump for reducing machine cost and customer will accept the price
easily. But this is not responsible action, customers can’t produce standard
product. It is just transforming the business pressure to customer. In general,
there are two features of circulating water vacuum pump. One is low efficiency,
about 30%, the better will be to 50%; the other is low vacuum degree. The above
two features decide it can’t supply high vacuumizing speed and vacuum degree in
short time. The best way is to add roots pump as the main pump, the circulating
water vacuum pump as frond pump. There are many good features of roots pump,
such as quickly start, pumping speed higher and higher efficiency……
So we can make sure customers could get
high quality product is shortest time.
Do you have other questions of vacuum fryer
or vacuum frying technology? Contact me when you are available.
