BMT Products

Multiple Effect Water Stills

Combining the advantages of the natural circulation method of distillation with the separation of pyrogens by forcing the steam produced to make a number of rigorous turns, the Pharmatec Multiple-Effect Water Still produces the highest quality Water-For-Injection regardless of the quality of water feeding the unit.

  • Two-year pressure vessel warranty
  • All stainless steel construction – no rusting or rouging
  • Wetted evaporator – less stress on welds, more corrosion resistant
  • 100% drainable design – no standing water
  • Sanitary diaphragm valves used on feed water, pure steam and WFI lines
  • Stay-warm feature – immediate production from standby
  • Industry standard control system – Allen-Bradley PLC or Siemens
  • Non-proprietary components – readily available from local sources
  • 25 Ra electropolished finish on feed water and product piping
  • Extensive validation documentation – reduces on site validation time

         MODEL                  Distillate Capacity at Different Heating Steam Pressures

Steam
Pressure WFI
58 psig
gals/hr
4 bar
lph
87 psig
gals/hr
6 bar
lph
116 psig
gals/hr
8 bar
lph
50-SIE 13 13 13 13 13 13
100-SIE 26 26 26 26 26 26
50-SI 12 45 21 80 26 100
120-S3 42 160 58 220 70 265
200-S3 66 250 92 350 108 410
250-S4 84 320 119 450 143 540
400-S4 111 420 180 680 222 840
500-S4 174 660 238 900 290 1100
700-S4 209 790 335 1270 383 1450
700-S5 209 790 335 1270 383 1450
700-S6 209 790 335 1270 383 1450
1000-S5 280 1060 449 1700 541 2050
1000-S6 280 1060 449 1700 541 2050
1500-S5 404 1530 647 2450 818 3100
1500-S6 404 1530 647 2450 818 3100
2000-S5 515 1950 832 3150 1082 4100
2000-S6 515 1950 832 3150 1082 4100
3000-S6 818 3100 1336 5060 1610 6100
3500-S6 950 3600 1478 5600 1901 7200
4000-S6 1043 3950 1624 6150 2138 8100
9000-S7 1294 4900 2244 8500 3194 12100


High Energy Efficiency 
The Pharmatec Multiple-Effect Water Still is one of the most energy efficient means for creating Water-For-Injection on the market today. The distillation process takes place in a number of columns (usually 3 – 8) that are connected in series. Each column is equipped with an evaporator and separator. Only the first column evaporator requires an external heat source such as plant steam or electricity. As feed water evaporates in the evaporator located at the bottom of the first column, it travels as steam up to the first stage separator where the steam is directed in a series of turns. Water droplets and impurities are stripped off, the steam then continue to the second stage separator where it is directed in a series 180 degrees turns to ensure dry pyrogen free pure steam. The pure steam that was created in the first column enters the second column to act as the heating source for the second evaporator. This process is continued on through each column, reusing the energy created in the previous column. The greater the number of columns, the less external energy required.

Greater Reliability
The Pharmatec evaporator utilizes a design that allows the tube bundle of the tube-and-shell heat exchanger to be totally immersed in feed water. The shell side of the evaporator contains the heating steam. Only after the tube side of the evaporator is filled with water is the plant steam applied to the shell side and, as a result, the feed water is brought up to temperature without shocking the evaporator welds. This safe design allows for less expansion and contraction of
the joints in the tube bundle, which results in longer life of the evaporator.

Less Water Consumption
The Pharmatec Water Still consumes less feed water than most all other water stills available. Utilizing a unique wetted evaporator and natural circulation design, only 3 to 5% of the total feed water is needed to carry the impurities to drain. Only a small amount of cooling water is required to accomplish the final cooling of the distillate as most of the cooling is accomplished by the feed water.