JZJ2B/JZJ2S series Roots water ring vacuum
unit is composed of ZJ or ZJB Roots vacuum pump as the main pump
and 2BV or 2SK water ring vacuum pump or Roots water ring unit as
the fore pump,It not only can suction the general gases,but also
can suction the other gases contain moisture or a small quantity of
dust.Compared with the general mechanical vacuum pump,it is not
afraid of oil pollution ,moisture and dust.And compared with
general water ring pump, it gets high vacuum and big pumping speed
when it works in the high vacuum.
The unit is used extensively in many areas such as chemical,
electric, machinery, pharmacy, altitude simulant test, food
sublimation drying etc.
When the oil is used as the working liquid of the fore
pump,it can effectively increase the vacuum of Roots vacuum unit(
refer to parameter list),Roots oil ring unit is closed circulation
system,which can reduce the pollution and save water. It is widely
used in the vacuum dipping, vacuum drying, and vacuum pumping.
How to choose the Roots water ring vacuum pump unit:Generally
,to choose the water ring pump as the fore pump is more favorable
than others,because it can pumping vast condensable steam
,especially when use the gas ballast oil and sealed mechanical
vacuum pump is not able to eliminate condensable steam,or the
suction solvents can deteriorate pump oil then effect its
performance,or sometimes the system is not allowed the pollution
.When choosing the vacuum unit,it is necessary to make the working
vacuum half or more than one of the ultimate vacuum in order to
meet the requirements.
Roots water ring unit generally have the following
types:
★ Roots pump +water ring pump:The function of the
water ring vacuum pump is to form the pre-vacuum for the Roots
pump. at present, 2BV.2BE1,2SK series water ring vacuum pump
usually are used as the fore pump,they can increase the ultimate
vacuum of the unit.Actually dont have SK series water ring vacuum
pump with low vacuum.
★
Roots pump+Roots pump+water ring pump:When use a
Roots vacuum pump,especially combine with water ring vacuum
pump,the entire unit maybe have the lower vacuum and the using
restricted range,but if two Roots pumps combine with water ring
pump again can significantly increase the entire vacuum.
★
Roots pump+Roots pump+Roots pump+water ring
pump:If the two Roots pumps and water ring pump still cant
meet the requirement of the vacuum, another Roots pump can be
added,these series Roots pump units are used in high vacuum
technology of vacuum freezing or drying
Type presentation:
EX: JZJ2B****2.1
J on behalf of the first letter of the unit
ZJ on behalf of the main pump using ZJ series Roots
vacuum pump
2B on behalf of the fore pump is 2BV/2BE series water ring
vacuum pump
2S on behalf of the backing pump is 2SK series water ring
vacuum pump
**0 is the suction speed of the main pump (L/S)
2.1 is the suction speed ratio among the three pumps
(the suction speed ratio between the main pump and secondary
pump is 2,and the second and the fore is 1)
JZJ2B, JZJ2S series Roots vacuum unit performance
parameters:
Unit type |
Main
pump |
Fore pump |
Suction speed
(L/S) |
Maximum suction pressure
Pa |
Extreme pressure(Pa) |
Total power(kw) |
water ring |
oil
ring |
JZJ2B***2 |
ZJ*0 |
2BV***1 |
*0 |
***0 |
**7 |
8 0 |
2.*5 |
JZJ2B***1 |
ZJ*0 |
2BV***0 |
*0 |
****0 |
4.*5 |
JZJ2B***2 |
ZJ*0 |
2BV***0 |
*0 |
***0 |
5.5 |
JZJ2B***1 |
ZJ*0 |
2BV***1 |
*0 |
****0 |
7 |
JZJ2B****2 |
ZJ**0 |
2BV***1 |
**0 |
***0 |
8.5 |
JZJ2B****1 |
ZJ**0 |
2BV***1 |
**0 |
****0 |
*4 |
JZJ2B****2 |
ZJ**0 |
2BV***1 |
**0 |
***0 |
*5 |
JZJ2B***2.1 |
ZJ*0 |
ZJ*0 , 2BV***0 |
*0 |
***0 |
*5 |
0.8 |
6.*5 |
JZJ2B****2.1 |
ZJ**0 |
ZJ*0 , 2BV***1 |
**0 |
***0 |
*0 |
JZJ2B****2.1 |
ZJ**0 |
ZJ**0 , 2BV***1 |
**0 |
***0 |
*8 |
JZJ2B****4.1 |
ZJ**0 |
ZJ*0 , 2BV***0 |
**0 |
***0 |
7.*5 |
JZJ2B****4.2 |
ZJ**0 |
ZJ*0 , 2BV***0 |
**0 |
***0 |
9.5 |
JZJ2B****4.1 |
ZJ**0 |
ZJ*0 , 2BV***1 |
**0 |
***0 |
*1 |
JZJ2B****4.2 |
ZJ**0 |
ZJ**0 , 2BV***1 |
**0 |
***0 |
*4 |
JZJ2B****4.1 |
ZJ**0 |
ZJ**0 , 2BV***1 |
**0 |
***0 |
*9.5 |
JZJ2B*****4.2 |
ZJ***0 |
ZJ**0 , 2BV***1 |
***0 |
***0 |
*6 |
JZJ2B****4.2.1 |
ZJ**0 |
ZJ*0,ZJ*0, 2BV***0 |
**0 |
***0 |
0.5 |
0.*5 |
*0.*5 |
JZJ2B****4.2.1 |
ZJ**0 |
ZJ**0,ZJ*0, 2BV***1 |
**0 |
***0 |
*5.5 |
JZJ2B*****4.2.1 |
ZJ***0 |
ZJ**0,ZJ**0, 2BV***1 |
***0 |
***0 |
*9 |
JZJ2S***1 |
ZJ*0 |
2SK*1.5 |
*0 |
****0 |
**7 |
*0 |
4.*5 |
JZJ2S***2 |
ZJ*0 |
2SK*1.5 |
*0 |
***0 |
5.5 |
JZJ2S***1 |
ZJ*0 |
2SK*3 |
*0 |
****0 |
9 |
JZJ2S****2 |
ZJ**0 |
2SK*3 |
**0 |
***0 |
*0.5 |
JZJ2S****1 |
ZJ**0 |
2SK*6 |
**0 |
****0 |
*8 |
JZJ2S****2 |
ZJ**0 |
2SK*6 |
**0 |
***0 |
*9 |
JZJ2S****1 |
ZJ**0 |
2SK**2 |
**0 |
***0 |
*6 |
JZJ2S****2A |
ZJ**0 |
2SK**2 |
**0 |
***0 |
*7.5 |
JZJ2S****2B |
ZJ**0 |
2SK**0 |
**0 |
***0 |
*2.5 |
JZJ2S***2.1 |
ZJ*0 |
ZJ*0 , 2SK*1.5 |
*0 |
***0 |
*5 |
0.8 |
6.*5 |
JZJ2S****2.1 |
ZJ**0 |
ZJ*0 , 2SK*3 |
**0 |
***0 |
*2 |
JZJ2S****2.1 |
ZJ**0 |
ZJ**0 , 2SK - 6 |
**0 |
***0 |
*2 |
JZJ2S****2.1 |
ZJ**0 |
ZJ**0 , 2SK**2 |
**0 |
***0 |
*1.5 |
JZJ2S****4.1 |
ZJ**0 |
ZJ*0 , 2SK*1.5 |
**0 |
***0 |
7.*5 |
JZJ2S****4.2 |
ZJ**0 |
ZJ*0 , 2SK*1.5 |
**0 |
***0 |
9.5 |
JZJ2S****4.1 |
ZJ**0 |
ZJ*0 , 2SK*3 |
**0 |
***0 |
*3 |
JZJ2S****4.2 |
ZJ**0 |
ZJ**0 , 2SK*3 |
**0 |
***0 |
*6 |
JZJ2S****4.1 |
ZJ**0 |
ZJ**0 , 2SK*6 |
**0 |
***0 |
*3.5 |
Roots vacuum unit selection consideration::
Learn about the pumping gas composition,containing
non-condensable,with or without particle dust,with or without
corrosiveness and others,so it is easier to select the appropriate
pump.If the gas contain steam,particles ,and corrosive gases should
be considered in the pump inlet piping installation of auxiliary
equipment,such as condenser,dust separator and so on.
Roots vacuum unit working pressure should meet the vacuum equipment
with the maximum vacuum and working pressure requirement.EX:A
vacuum drying process requirements *0mmHg(absolute pressure) of the
working pressure,the choice of the vacuum limit pressure at least
2mmHg,preferably less than 1mmHg.
Roots vacuum unit is necessary to select the correct operating
point.units normal working range is the maximum suction pressure
limit pressure×5.EX:JZJ2B****2.1 Roots water ring vacuum units
normal working range is:***0Pa***5Pa.This is the normal range
working pressure after opening the main pump,the unit has the best
efficiency within this scope..Vacuum pump unit in its working
pressure should be able to discharge all the gas in the equipment
process.
According to actual condition to choice the appropriate unit
configuration.EX:JZJ2B****4.1 unit and JZJ2B****2.1 unit the
maximum pumping is the same as the pressure,but the difference is
the scope of their work and the power consumption. JZJ2B****4.1
unit of the normal working range is ***0Pa***5Pa, JZJ2B****2.1 unit
of the normal working range is ***0Pa***5Pa.Obviously JZJ2B****2.1
has wider working range,but its power consumption is also
greater.If we can confirm that the work pressure of pumping system
was<***0Pa should be preferred JZJ2B****4.1 unit to save energy.
However, if the system requires a strong unit of pre-pumping
capacity, and work unit take longer time at higher pressure, the
greater use before the pump JZJ2B****2.1 units more
appropriate.
Explanation:⑴The table above are the recommended standard
series.Because under the various practical working
conditions, the suction gases and the pressure will have many
changes , . when choose the unit, the actual working conditions,
the gas release process,the condensable gas condensation conditions
and suction pressure of time should be considered etc. Others refer
to the existing equipments.
⑵Detailed technical specifications of a single pump refer to the
pump parameter .
⑶The maximum pressure that enable the main pump work,if the main
pump works under the max suction pressure for a period, it may be
overloaded .Such as the vacuum pump motor, electric contact vacuum
table, cabinet need proof, please specify when ordering, on the
table 2BV2 series corresponding to 2BV*-Ex series, 2BV5 series
corresponding to 2BV6 series.