Typical Elliott four-stage j ejector in the plant o f ο pharmaceutical manufac turer, where it maintains continuous vacuum in dry ing a sterile product from 1 the frozen state. The out· j line drawing below ex· *J plains ejector arrangement.
FIRST STAGE
IOO-250
SMALL TWO-STAGE NONCONDENSING EJECTOR
SECOND
STAGE
microns v a c u u m
BAROMETRIC INTERCONDENSER
tions e m p l o y i n g b a t c h systems. It is just one o f the This Elliott four-stage ejector maintains high vacuum
many angles o f ejector a p p l i c a t i o n w h i c h the e x p e r i
on a series o f cabinets in which a sterile p r o d u c t is
ence o f Elliott engineers w i l l suggest to y o u f o r more
dried f r o m the frozen state. The d r y i n g cycle lasts 2 4
efficient v a c u u m m a i n t e n a n c e . The a d v i c e o f these
hours, a n d the ejector operates continuously. To a v o i d
engineers is a t y o u r service. They can show y o u t h a t
disturbing the maintenance of h i g h v a c u u m , b e f o r e
steam jet ejectors, p r o p e r l y designed a n d a p p l i e d , w i l l
each n e w l y l o a d e d cabinet is connected to the f o u r -
del iver the vacuum you require cheaper a n d more con
stage ejector it is first evacuated to a low absolute
veniently t h a n a n y other m e t h o d . A n d t h e y can show
pressure b y separate quick-evacuation equipment.
y o u w h y a n d h o w . W r i t e us a b o u t y o u r p r o b l e m .
Thus the operation o f the four-stage ejector at h i g h vacuum is little affected by the l o a d i n g or u n l o a d i n g
E L L I O T T
o f i n d i v i d u a l drying cabinets.
HEAT TRANSFER DEPT., JEANNETTE, PA. Plants In: Jeannette, Pa., Ridgway, Pa., Springfield, 0 . , Newark, N. J. D I S T R I C T OFFICES IN PRINCIPAL CITIES
The 'trick of a two-vacuum system, o r the use o f a
C O M P A N Y
startup ejector is being applied in numerous installa-
ELLIOTT
VACUUM EQUIPMENT and
New Text APPLICATION
V O L U M E
2
4,
NO.
16
..
AUGUST
2 5,
1946
ENGINEERING 2157
