Product Manual

Page 7
SECTION 2
INTRODUCTION
The EMD US range of compressed air dryers are designed to remove moisture from compressed air by
utilising state of the art technology to obtain dewpoints of -40 (-40°F) PDP and by appropriate de-rating
-70°C (-100°F) PDP.
EMD US dryers have been designed to require minimal maintenance and can be installed virtually
anywhere.
The EMD US dryer consists of upper and lower head assemblies joined together with an aluminium
extrusion containing twin internal chambers. The upper head assembly contains inlet and outlet
manifolds. The lower head assembly contains two exhaust valves and a passive shuttle ball valve. During
operation one chamber is on-line (drying) while the other is regenerating, using the Pressure Swing
Adsorption (PSA) process
2.3 PRESSURE SWING
ADSORPTION (PSA)
A small percentage of dried air is taken from the dryer outlet flow and is used to
regenerate the saturated chamber by expanding the dried air from line pressure to
atmospheric pressure. During this process, the moisture is physically removed from
the regenerating chamber and vented to atmosphere through the exhaust.
2.2 GENERAL SPECIFICATION
Outlet Dewpoint: -40 ˚F (-40˚C) Optional:
-100˚F (70˚C) Optional: -4˚F (-20˚C)
Environmental Protection IP65 (NEMA12)
Noise Level <70 dB(A)
GROUP MODEL TYPE
INLET FLOW RATE
(m3/h)
INLET -OUTLET
CONNECTION*
Modular EMD US-25
35 1/2" NPT
Modular EMD US-45
70 1 1/2" NPT
Modular EMD US-110
170 1 1/2" NPT
Modular EMD US-120
200 1 1/2" NPT
Modular EMD US-190
300 1 1/2" NPT
Modular EMD US-260
400 1 1/2" NPT
CFM
WEIGHT
(kg)
42
71
133
152
186
235
20
40
100
120
180
240
WEIGHT
(Lbs)
92
156
292
334
409
517
*NPT thread is standard. Optional BSP thread is available
ıı
Note: Performance data based on 100°F ambient temperature, 100°F inlet temperature and 100 psig inlet pressure.