specific gravity than water
(
)
3
/
1
cm
g
, the
injectors actual suction capacity can be determined based on the following equation:

A
is the actual (adjusted) suction capacity L
A
=
L
is the listed suction capacity found in the Performance Tables is the specific gravity, in
, of the material being injected
3
/ cm
g

Example 1:
The Model 1078 Injector at 50 PSIG inlet pressure and 20 PSIG outlet pressure
has a listed suction capacity
( )
L
of 92.4 GPH.
If
the
specific
gravity
( ) of the chemical being injected is 1.5, then
the actual suction capacity of the injector will be 61.6 GPH:

6
.
61
5
.
1
4
.
92 =
=
= L
A






Suction Height
The Mazzei
®
Injector Performance Tables for Liquid Suction are based on the assumption that the injector and injected
liquid are at the same height. If this is not the case, the difference in height
(
)
m
l
h
h will cause the Injectors suction
capacity to change, based on the following equation:


A
is the actual (adjusted) suction capacity

L
is the listed suction capacity found in the Performance Tables
is the height, in feet, of the liquid being injected
l
h

is the height, in feet, of the Mazzei
m
h
®
Injector
(
)
34
34
m
l
h
h
L
A + =

Example 2:
The Model 2081 Injector at 40 PSIG inlet pressure and 15 PSIG outlet pressure
has a listed suction capacity
( )
L
of 631 GPH.
If the liquid to be injected is located 2 feet above the ground
( )
l
h
and
the injector is located 5 feet above the ground
( )
m
h
then
the actual suction capacity of the injector will be 575 GPH:
(
)
(
)
575
34
5
2
34
631
34
34
= + = + =
m
l
h
h
L
A




Example 3:
The Model 584 Injector at 50 PSIG inlet pressure and 25 PSIG outlet pressure
has a listed suction capacity
( )
L
of 24.5 GPH.
If the liquid to be injected is located 8 feet above the ground
( )
l
h
and
the injector is located 1 foot above the ground
( )
m
h
then
the actual suction capacity of the injector will be 29.5 GPH:
(
)
(
)
5
.
29
34
1
8
34
5
.
24
34
34
= + = + =
m
l
h
h
L
A





Mazzei Injector Corp. 500 Rooster Dr. Bakersfiled, CA 93307 USA
www.mazzei.net
Phone: 661-363-6500 Pg.
1
1


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TECHNICAL BULLETIN No. 1
®
LIQUID SUCTION CAPACITY CORRECTIONS FOR MAZZEI INJECTORS


Elevation
i
®
Injector Performance Tables for Liquid Suction are based on the assumption that the application is at sea
at
The Mazze
level. Use the following graph and then the equation to determine the reduction in suction capacity if the application is
an elevation higher than sea level:

Relationship between elevation (feet) and atmospheric pressure (PSIA)
10.0
11.0
12.0
13.0
14.0
15.0
16.0
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
Elevation Above Sea Level (feet)
A
t
m
o
sp
h
e
r
i
c P
r
essu
r
e

(
P
S
I
A
)





A
is the actual (adjusted) suction capacity
L
is the listed suction capacity found in the Performance Tables
bsolute)

Example 4:
The Model 1078 Injector at 30 PSIG inlet pressure and 20 PSIG outlet pressure
7
.
14
L
A =
p
p
is the atmospheric pressure, in PSIA (pounds per square inch a

has a listed suction capacity
( )
L
of 55.4 GPH.
If the injector is being used i
aho Falls at an
n Id
elevation of 4700 feet,
the graph shows the atmospheric pressure
( )
p
would be near 12.3 PSIA, therefore
the actual suction capacity of the injector will be 46.4 GPH:

4
.
46
7
.
14
3
.
12
4
.
55
= = =
p
L
A

7
.
14








Mazzei Injector Corp. 500 Rooster Dr. Bakersfiled, CA 93307 USA
www.mazzei.net
Phone: 661-363-6500 Pg.
2
2


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TECHNICAL BULLETIN No. 1
®
LIQUID SUCTION CAPACITY CORRECTIONS FOR MAZZEI INJECTORS


Specific Gravity, Suction Height, and Elevation
i
All three factors, specific gravity of the injected liqu d
( ) , difference in height between the injector and the injected
to
liquid
(
)
h
h , and the atmospheric pressure
( )
p
due
elevation, will affect the injectors suction capacity:

m
l
A
is the actual (adjusted) suction capacity
L
is the listed suction capacity found in the Performance Tables is the specific gravity, in
3
/ cm
g
, of the material being injected
square inch absolute)


iscosity
(
)
7
.
14
34
34
p
h
h
L
A
m
l
+ = l
h
is the height, in feet, of the liquid being injected
m
h
is the height, in feet, of the Mazzei
®
Injector
p
is the atmospheric pressure, PSIA (pounds per

V

i
®
Injector Performance Tables for Liquid Suction are based on the assumption that the injected liquid has the
n
uction Line Tubing
The Mazze
same properties as water. If the liquid being injected has a different viscosity than water
( )
cP
1
, due to other variables
such as temperature, friction in the suction line tubing, etc., there is no simple formula to determine the change in suctio
capacity. However, in general, if the injected liquid has a higher viscosity than water, the injectors suction capacity will
be decreased.


S

mum suction from any Mazzei
®
Injector, it is critical to use the correct size suction line. Suction
In order to obtain maxi
line tubing that is too small will decrease the suction capacity of the injector. Use the following guide:

Mazzei
®
Injector Models
Minimum Suction Line Tubing Size (ID)
283, 28
4, 684
7, 384, 384X, 484, 484X, 58
4
1
inch
878, 885X, 1078, 1583, 1585X, 1587
2
1
inch
2081, 2083X
1 inch


















Mazzei Injector Corp. 500 Rooster Dr. Bakersfiled, CA 93307 USA
www.mazzei.net
Phone: 661-363-6500 Pg.
3
3