SAVE MAN-HOURS WITH HIGH VACUUM COMPONENTS MADE BY MEN WHO USE THEM
NRC M o d e l 5 2 0
NRC M o d e l 1O0M
NRC B o o s t e r a n d Diffusion Pumps
Because o f the G a s Ballast f e a t u r e , these pumps maintain their original high efficiency even when pumping 1 0 0 % w a t e r , o r other condensable vapors. Therefore, expensive oil purifiers a n d f r e q u e n t a n d costly oil changes a r e not n e e d e d . NRC pumps have p a i d f o r themselves in three years from oil savings alone.
While NRC high vacuum diffusion and booster pumps a r e unsurpassed f o r through-put, blank off / a n d forepressure tolerance, they a r e es pecially outstanding f o r reliability. They offer long, trouble-free life, and a r e easy to maintain. Narcoil pumping fluids a r e unusually stable, have excellent pumping characteristics, a n d a r e l o w p r i c e d . N a r c o i l - 1 0 is $ 1 0 . 5 0 p e r gallon a n d NarcoH-40 is $ 3 8 . 5 0 per gallon.
Model Model
Capacity CFM
Ultimate Vacuum Gas Ballast Off mm. He (A)
SINGLE
2-S 4-S 6-S
1.25
3.3 6.75
10-3 10-3 10-3 10-2 10-3 10-3 10-2 lO-3
100
3x 3x 3x
200-S 400-S
202 403
lx 5x
DOUBLE
2D 4D 6D 15D
1,25
3.3 6.75
Model
BlankOff, mm. Hg(C)
Max. Speed Liters/ Sec.
Toler able Forepres sure mm. Hg
DIFFUSION S Ε ,_ C"
| 3
1i £
I
$155
225 312 475 800
Pumping Fluid
Price (D)
2500 3875
$215
750 1200 1975 3200 5425
3x 3x
10-3 10-3
200M 400 M
202 403
3x 3x
IO'3 IO-3
3 χ IO-3 3 χ IO-3
Type
Range mm. Hg
NRC H I G H V A C U U M
Price com plete with head(s)
GAUGES
G-2-M (A) 8 χ 10-' H-2-P 2 χ 10-'
30 80
0.50 0.25
Mercury Narcoil 40
$225 125
501
Thermocouple Head
IO-3 to 1.0
$10.50
A-2-P (B) 2 χ 10-6 H-4-P 5 χ 10-' H-6-P 5 χ 10-'
85 300 730
0.20 0.31 0.20
DC 703 Narcoil 40 Narcoil 40
150 245 410
507
Ionization Head
2 χ 10-» to 5 χ 10-3
22.00
5 χ 10-' 1900 5 χ 10-' 5500
0.19 0.30
Narcoil 40 Narcoil 40
745 1320
510
Alphatron® Ionization
10-3 to 10.
520.00
H-10-P H-16-P
BOOSTER
2.5 χ 10-2 2.5 χ 10-2 2.5 χ 10-2
100
Model
1475
5x io- 5 5x io- 5 5x io- 5
30 M 100M
NRC vacuum gauges a r e outstanding f o r their accuracy a n d ability to withstand h a r d usage. The NRC M o d e l 5 2 0 shown a b o v e is a n a l l purpose g a u g e with uniquely w i d e r a n g e a n d accuracy. Its r u g g e d i z e d new circuitry eliminates troublesome components, minimizes contamina tion effects a n d provides highly stable linear amplification.
PUMPS
PUMPS
STAGE
2.5 χ IO"2 3 χ 10-3 3 χ IO-3
14.75 29.5
Price (B)
STAGE
3x 3x 3x
15-S 30-S 100-S
11.6 29.5
Ultimate Vacuum Gas Ballast On mm. Hg(A)
Vacuum Gages
Diffusion and Booster Pumps
Mechanical Vacuum Pumps
280 425
8-1 B-2
1 χ 10-" 1 χ 10-»
8 85
0.30 0.85
Narcoil 10 Narcoil 10
$ 65 195
B-4 B-6
1 χ 10-" 1 χ IO-4
260 530
1.30 0.90
Narcoil 10 Narcoil 10
355 990
B-12
. χ 10-" 3500
0.90
Narcoil 10 ,«,"„%
515
Logarithmic Alphatron® Ionization
10-3 to 10.
250.00
561
Pirani
10-3 to 1.0
175.00
520
Alphatron® Ionization
10-" to IO3
550.00
701
Thermocouple
IO-3 to 1.0
130.50
710
Thermocouple Ionization
2 χ 10"8 to 1.0
438.00
Nofe A: Glass pump Nofe B: A i r - c o o l e d . Price includes b l o w e r Nofe C: U n t r a p p e d ion g a u g e , except f o r G - 2 - M Nofe O: Includes initial charge of pumping Nofe A: McLeod g a u g e r e a d i n g Nofe 6: F.O.B. N e w t o n , Mass. Price includes pump, base, v-belt d r i v e , a n d motor
fluid
See us in Booths 2 1 0 8 METAL SHOW Cleveland October 8-12 As a and
pioneer
in t h e m a n u f a c t u r e
use o f h i g h v a c u u m
NRC l e a r n e d w e l l w h a t components time
c a n cost
unreliable in
a n d money. O f f e r e d
wasted above
are components d e v e l o p e d b y NRC to m e e t its h i g h o p e r a t i n g ards.
To g e t further
send c o u p o n .
NRC EQUIPMENT C O R P O R A T I O N A Subsidiary of NATIONAL RESEARCH CORPORATION
systems,
stand
information
Ν RC EQUIPMENT CORPORATION
D e p t . 2 2 9 Charlemont Street, N e w t o n Highlands 6 1 , Massachusetts Please send NRC Bulletins on Mechanical Pumps Q ; Diffusion a n d Booster Pumps Q ; Vacuum G a u g e s Q Have representative call Q Name
Title
Company Address
City
.Zone.
. State.
For further information, circle numbers 87 A-1, 87 A-2, 87 Λ 3 on Readers' Service Card, page 139 A VOL. 48, NO. 9 · S E P T E M B E R 1 9 5 6 8 7 A
