PERMA PURE MD ™ -Series Gas Dryers r e b m u N l e d o M 0 5 0 - D M 0 7 0 - D M 0 1 1 - D M . D . O e b u T n o i f a N " 3 5 0 . 0 " 2 7 0 . 0 " 8 0 1 . 0 . D . I e b u T n o i f a N " 2 4 0 . 0 " 0 6 0 . 0 " 6 8 0 . 0 s h t g n e L e l b a l i a v A 1 s e h c n i 4 4 1 r o 6 9 , 2 7 , 8 4 , 4 2 , 2 1 s l a i r e t a M g n i s u o H e n e l y p o r p y l o P r o n o b r a c o r o u l F r o l e e t S s s e l n i a t S e t a R w o l F m u m i x a M . n i m / c c 0 0 2 . n i m / s r e t i l 2 2 . n i m / s r e t i l 4 2
Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Protect Moisture-Sensitive Equipment bySelectively Drying Sample or Carrier Gas
Perma Pure MD™-Series gas dryers use exclusive Nafi on® selectively permeable
membrane tubing to continuously remove only water vapor from gas streams. These
dryers operate over a wide range of temperatures, pressures and fl ow rates while
drying to very low dew points.
Principle of Operation
MD-Series gas dryers transfer moisture from one gas stream to a counter-fl owing
purge gas, much like a shell-and-tube heat exchanger transfers heat. Water molecules
permeate through the Nafi on tube wall, evaporating into the purge gas stream. The
water concentration differential between the two gas streams drives the reaction,
quickly drying the air or gas.
Purge gas should be instrument air or other dry gas. If no dry gas is available, a portion
of the gas dried by the MD-Series dryer can act as the purge gas in a split-stream or
refl ux method. For more infromation about the drying process, including the use of the
sample gas as the purge gas, please visit our website at www.permapure.com.
• Dries continuously
• Removes only water vapor
• Achieves low dew points
• Requires no electricity
• Maintenance-free operation
• No moving parts
• Excellent corrosion resistance
• Short residence time
PERMA PURE
MD™-SeriesGas DryersMD™-SeriesGas Dryers
1 MD-050 Series dryers are not offered in 96 and 144-inch lengths. 2 MD-070 and MD-110 offer approximately the same drying performance. Specify MD-110 when pressure drop is a concern, MD-070 to minimize dead volume. For higher fl ow rates, please see our PD-Series dryers.
rebmuNledoM 050-DM 070-DM 011-DM
.D.OebuTnoifaN "350.0 "270.0 "801.0
.D.IebuTnoifaN "240.0 "060.0 "680.0
shtgneLelbaliavA 1 sehcni441ro69,27,84,42,21
slairetaMgnisuoH enelyporpyloPronobracoroulFroleetSsselniatS
etaRwolFmumixaM .nim/cc002 .nim/sretil2 2 .nim/sretil4 2
Perma Pure offers three MD-Series dryer product lines:
Bulletin 103
Pressure Drop Calculations:∆ P for MD-050 (inches of water) = Sample fl ow rate (lpm) x length of dryer (inches)∆ P for MD-070 (inches of water) = Sample fl ow rate (lpm) x 0.14 x length of dryer (inches)∆ P for MD-110 (inches of water) = Sample fl ow rate (lpm) x 0.07 x length of dryer (inches)
MD™ is a Trademark of Perma Pure LLC. Nafi on is a Registered Trademark of E.I. DuPont
-50
-40DEW
POIN
T ( C
)
-30
0 100 200
0
-10
-20
20 40 60 80 120 140 160 180
-60
FLOWRATE (cc/min)
MD-050 Drying PerformanceMD-050-12
MD-050-24
MD-050-48
MD-050-72
FLOWRATE (l/min)
MD-070-144
MD-070-96
MD-070-72
MD-070-48MD-070-24
MD-070-12
-25
-20
-15
0 1 2 3 4
10
5
0
-5
-10
MD-070 and MD-110 Drying Performance
DEW
POIN
T ( C
)
BA
C
ETA Process Instrumentation Martech Controlswww.etapii.com [email protected] [email protected] 978.532.1330 tel: 315.876.9120
Related Documents
