NavCom Technology BH 3 User manual
OPERATING CHARACTERISTICS
IMPACTING SILENT
FREQUENCY 3400 VPM 1800 VPM
AIR
CONSUMPTION
11.6 C.F.M.
@ 50 PSI
11.6 C.F.M.
@ 50 PSI
328.5 L.P.M.
@ 3.45 Bar
328.5 L.P.M.
@ 3.45 Bar
SOUND LEVEL 96 dbA 76 dbA
HOPPER SIZING CRITERIA
HOPPER
CAPACITY 10 – 20 tons (9071.85 – 18143.7 kgs)
WALL
THICKENSS
RANGE
1/4” (6.35 mm) – 3/8” (9.5 mm)
The NAVCO BH 3 is a Pneumatic Piston Vibrator designed to provide reliable and effective performance, even when
exposed to sever adverse elements. The size and operating characteristics of the BH 3 make it ideally suitable for solving
medium duty bulk material flow problems.
Operation and Construction
The model BH 3 vibrator incorporates a nominal 3” piston and bore. During operation, compressed air is alternately
directed from one end of the piston to the other through a series of internal ports. The piston is the only moving part, which
makes the pneumatic piston vibrator a reliable, low maintenance device. The vibrator housing is a one piece, ductile iron
casting. This adds to the durability and reliability of NAVCO Pneumatic Piston Vibrators.
The action of the piston in a pneumatic piston vibrator generates high amplitude vibration with unidirectional or linear force
vectors. High amplitude characteristics enable the vibrating energy to be transmitted in the capacity required to overcome
the strength of the bulk material involved in a bridge (arch) or a rathole (pipe). Other advantages of high amplitude, linear
vibrators include low utility consumption and minimum bin wall stress.
Linear Vibration offers the following advantages:
¾The work or energy generated by the vibrator can be directed normal or perpendicular to the flow of bulk material to
address a specific material flow problem. The vibrator work is used very efficiently to reduce the sliding friction angle of
the hopper and to overcome the strength of the bulk material in the hopper. These two factors are the key to promoting
the flow of bulk solid materials.
¾Vibrators that generate linear vibration do not develop high shearing forces at the bin wall. This allows a simple, more
direct approach to mounting these vibrators.
¾Linear vibration is ideal for driving vibratory feeders and compaction tables.
BH 3
BIN / HOPPER VIBRATO
R
NO
TE: External Dimensions of BH
3
.
00
I
GO
,
BH
3
.
00 SGO
&
BH
3
.
00
I
G
T are same.
O
O
P
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E
E
E
RR
R
R
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A
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TI
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C
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FR
EQ
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34
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PM
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B
B
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7
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TY
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10
10
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1
–
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2
2
2
2
2
2
0 to
ns
s
s
s
s
(
90
0
0
90
90
0
0
0
71.85
–
–
–
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–
18
8
8
8
14
14
1
14
4
14
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14
3.
3
3.
3.
3.
77
7
7
k
k
k
k
k
k
kg
k
s)
)
W
W
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L
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”
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The NA
VCO
BH 3 is a Pneumatic Piston
Vi
b
rator desi
g
ned to provide reliable and effective performance, even when
exposed to sever adverse elements. The size and operatin
g
char
a
cteristics of the BH 3 make it ideall
y
suitable for solvin
g
medium dut
y
bulk material flow problems.
Operation and Construction
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feeders and compaction tables.
BH
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Model Types
The NAVCO BH 3 is available in three model types; Impacting,Silent and Timed Impact.
Impacting Vibrator:
The Impacting Model BH 3 IGO
develops a high amplitude repetitive
impulse when the piston strikes the
base of the bore sharply on each
cycle. The piston is air cushioned at
the head plate on the upward stroke.
Momentum and energy are
transmitted through the bin wall and
into the material by each elastic
collision between the piston and the
vibrator base. The repetitive impacts
enable the Vibrator to affect material
over a large area of influence
overcoming the bulk material
strength and reducing the wall
friction angle.
NAVCO Impacting Pneumatic Piston
Vibrators are excellent for all bulk
material flow problems, especially
those involving cohesive materials
with marginal to poor flow
characteristics. They are also effective
in cleaning adhering material from
empty bins and process vessels.
Silent Vibrator:
The Silent Model BH 3 SGO
generates a sinusoidal output by
creating an air cushion at each end of
the piston stroke. NAVCO Silent
Pneumatic Piston Vibrators are
effective in applications involving
non-cohesive or free flowing
materials where a slight increase in
energy is required to initiate or
maintain flow. The Silent Units are
also ideal as drivers for vibratory
tables and feeders.
Timed Impact Vibrator:
The Timed Impact Model BH 3
IGT delivers a single, high amplitude
impulse each time it is energized.
NAVCO Timed Impact units may be
operated using pneumatic or
electronic timers, programmable
controllers, or any other device that
can deliver an intermittent control
signal to the unit. The impulse of
Timed Impact unit is very effective in
evacuating hoppers and process
vessels. Specific advantages of
NAVCO Timed Impact units are low
noise levels and very low air
consumption.
Choosing Proper Vibrator
Proper sizing and Installation of vibrators are critical to the success of the flow aid system.
The three major factors to consider in selecting pneumatic piston vibrators for hopper applications are:
¾The wall thickness of the hopper.
¾The volume and mass of material in the hopper.
¾The flow characteristics of the bulk material.
The NAVCO BH 3 is a medium duty vibrator. It may be applied to hoppers with a capacity of 10 – 20 tons, with a wall
thickness of 1/4” (6.35 mm) – 3/8” (9.5 mm). On thinner walls, a reinforcement plate is recommended. On thicker wall, a
larger unit should be selected.
Installation
The optimal mounting location for a vibrator in a typical
hopper application is at the point of the flow restriction. If
the exact position is unknown, the vibrator should be
located from 1/4th to 1/3rd of the height of the hopper from
the discharge. For large hoppers, hoppers with unusual
geometry, or particularly difficult material flow problems,
multiple vibrators may be required.
The vibrator mounting plate should be skip welded to the
hopper wall using a low hydrogen welding rod. If
reinforcement is required, it should be skip welded, also
with a low hydrogen rod.
To ensure proper application and operation of NAVCO
vibrators, NAVCO offers a complete line of system
accessories. The BH 3 has a 3/8” NPT Inlet and therefore
utilizes 3/8" NPT accessories.
For Assistance, please contact
NAVCO INDIA LLP,
(JOINT VENTURE OF KJN ENTERPRISES & NAVCO, USA)
C/o. KJN Enterprises
68A, New Empire Industrial Estate,
Kondivita Lane, J.B. Nagar,
Andheri (E), Mumbai-400 059.
India.
Ph.: 022 – 28342079 / 30888514
Fax: 022 – 30888515
Web Site: www.navcoindia.com
www.kjnenterprises.com
www.navco.us
Email: info@kjnenterprises.com
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NAVCO Impactin
g
Pneumatic Piston
V
ibrators are excellent for all bul
k
mate
ri
ri
ri
ri
al
f
f
low
pr
pr
pr
pr
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nal to
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p
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Vib
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ree
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Time
d
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li
tu
tu
tu
t
u
de
d
d
impulse each time it is energize
d.
d
d
NAVCO Timed Impact units may
b
b
b
e
op
p
p
p
p
p
er
e
er
e
at
at
at
t
t
t
e
e
e
e
ed
e
e
e
e
u
u
u
u
u
u
u
u
u
u
si
s
s
ng
ng
ng
g
ng
g
g
g
g
p
n
n
ne
ne
e
e
n
n
n
umum
m
m
m
m
m
atat
at
at
a
at
at
ic
ic
ic
o
o
o
r
el
l
e
e
e
ec
e
tr
tr
tr
r
o
o
o
o
on
o
ic
t
t
t
im
m
m
m
m
e
e
er
s,
p
p
p
p
p
ro
o
o
g
g
g
gr
g
g
g
am
am
am
m
m
am
a
a
ma
ma
a
a
a
ma
ma
a
a
bl
l
l
e
e
co
co
o
o
co
c
o
nt
r
rr
r
o
r
llers,
o
r
a
a
a
an
y
ot
h
h
h
h
he
he
h
h
h
h
r
de
de
de
de
vivi
vi
vi
i
i
ce
ce
ce
ce
ce
ce
ce
ce
c
t
ha
a
a
t
c
c
ca
a
ca
c
c
c
c
n
n
d
de
de
de
d
de
li
li
li
li
li
i
ve
ve
ve
ve
v
ve
ve
ve
e
r
r
r
r
r
r
r
r
r
an
an
an
n
n
i
i
i
i
i
i
t
nt
nt
nt
ntnt
t
er
er
er
er
er
er
e
er
er
e
e
e
m
mimi
mi
m
tt
t
tt
tt
tt
t
t
t
t
en
e
e
e
e
t
co
nt
ro
o
o
l
si
si
i
i
si
gn
gn
gn
l
al
l
al
al
t
t
t
o
o
o
th
th
th
h
h
t
th
e
e
e
un
un
un
i
it
i
it
it
it
.
.
.
Th
Th
T
T
Th
T
Th
Th
e
e
e
im
im
im
pu
pu
pu
ls
ls
ls
e
e
e
of
of
of
Ti
me
d
Impact un
i
t
i
s ver
y
e
ff
ect
i
ve
i
n
evacuat
i
ng
h
op
pe
rs an
d
p
rocess
vesse
l
s.
S
pec
ifi
c a
d
vanta
g
es o
f
NA
V
CO
T
i
me
d
Im
p
act un
i
ts are
l
o
w
no
i
se
l
eve
l
s an
d
ver
y
l
ow a
ir
consum
p
t
i
on.
Ch
Ch
h
h
h
h
o
oo
o
si
ng
g
g
g
g
g
P
roper
V
V
V
Vi
V
V
br
at
at
at
t
t
or
or
r
or
or
or
o
Pr
P
op
p
p
p
er siz
in
n
n
n
n
g
g
and
In
In
In
In
n
stalla
ti
i
i
on o
f
f
f
f
f
f
v
vi
brat
o
or
o
s are
cr
it
it
t
it
t
ic
al
al
al
t
o the
su
su
su
s
su
s
s
cc
cc
cc
cc
e
es
s of
t
t
t
t
t
h
he
h
h
h
h
f
f
f
f
f
low ai
d
d
d
d
d
system.
f
Th
Th
h
h
h
h
h
e t
h
re
e
e
e
e
e
e
ma
a
a
a
a
a
j
jo
j
j
j
j
j
r
f
act
or
r
r
r
r
s
to
to
to
o
o
to
t
con
si
i
i
de
de
de
r
r
r
in
in
in
s
e
l
ec
t
ti
t
ng
p
p
p
p
p
neumat
i
c
p
p
p
p
p
p
p
i
is
ton
vi
vi
v
v
vi
v
b
rat
or
r
s
s
s
fo
fo
fo
fo
r
h
o
pp
p
p
p
p
e
e
er
e
e
a
a
a
p
pp
p
pp
p
pp
li
ca
ti
ti
i
i
on
on
on
o
on
s
s
s
ar
e:
¾
Th
T
T
T
T
T
e wa
l
l
ll
ll
l
l
thick
ne
ne
ne
n
ss of
th
h
h
h
e
e
h
h
ho
h
h
pp
pp
er
.
¾
T
Th
T
Th
T
Th
T
T
T
T
e
e
e
vo
vo
vo
lu
lu
lu
me
me
me
a
a
a
nd
nd
nd
m
m
m
as
as
as
s
s
s
of
of
of
m
m
m
at
at
at
er
er
er
ia
ia
ia
l
l
l
l
in
in
in
in
n
t
t
t
t
he
he
he
he
he
h
h
h
op
op
op
pe
pe
pe
r
r
r.
¾
T
Th
e
fl
ow
c
hara
c
t
e
ri
s
ti
cs
o
f th
e
bu
lk mat
e
rial
.
Th
T
e
NA
N
NA
NA
N
N
NA
NA
VC
VC
VC
VC
VC
O
O
O
O
O
BH
H
H
H
H
H
3
3
3
3
3
i
i
i
i
i
s
s
s
s
s
s
s
a
me
me
meme
me
me
di
di
i
i
i
i
di
di
di
um
u
d
d
d
d
d
d
d
ut
ut
ut
ut
ut
ut
u
y
y
y
y
y
y
vi
vi
vi
vi
vi
br
br
br
br
bb
br
r
br
at
a
a
a
a
a
or. It
m
m
m
m
m
m
m
m
ay
ay
ay
ay
ay
ay
b
b
b
b
b
e
e
e
e
e
e
e
ap
a
a
a
a
a
plied
to
to
to
to
to
to
t
h
h
h
h
h
op
o
o
o
pers with a
ca
a
a
pa
pa
pa
pa
papa
p
ci
ci
i
ci
i
ci
i
i
ty
of
10
10
10
0
0
–
–
2
0 to
ns
ns
ns
s
s
s
ns
,
,
wi
wi
wi
wi
i
th
th
thth
th
a
a
a
a
a
a
a
a
w
al
l
l
l
th
h
ic
kn
kn
k
k
k
es
e
es
es
es
e
e
e
e
s
o
of
of
of
o
f
o
of
1
/4
”
(6
.3
5
5
5
5
m
mm
mm
m
mm
m
)
)
)
–
–
–
–
3/
8
8”
”
””
8
(
(
9.
9.
9
9.
.
5
5
5
5
5
mm
mm
mm
m
m
m
m
m
m
).
).
).
)
).
)
)
On
t
t
t
t
t
t
hi
hi
hi
h
h
h
h
h
nn
n
n
n
n
n
n
ee
er
er
e
e
er
e
w
alls
,
,
,
a
a
a
a
a
re
re
r
in
f
f
f
fo
f
f
f
rcement
p
late
i
i
is
is
rr
r
r
e
e
e
e
e
ec
e
e
e
om
me
me
e
e
me
me
e
nd
nd
nd
d
e
e
e
e
ed
e
e
e
. On
t
t
t
t
t
t
t
t
hi
i
ck
ck
ck
k
ck
k
k
k
er
er
r
r
er
r
w
w
w
al
al
al
l
l
l
l
al
l
l,
a
la
a
r
g
er
r
r
u
u
u
u
ni
i
t
t
t
t
t
t
shou
ld
d
d
d
d
d
ld
d
d
b
e
e
e
e
e
e
e
e
e
sese
s
s
le
le
e
e
le
c
c
c
ct
ed
ed
ed
d
d
d
ed
d
d
d
.
In
In
n
In
In
In
In
n
n
st
al
al
al
al
al
a
al
a
a
a
la
a
la
la
la
la
t
t
t
ti
t
t
t
on
The optimal mountin
g
location for a vibrator in a t
y
pical
ho
pp
er a
pp
lication is at the
p
oint of the flow restriction. If
the exact
p
osition is unknown, the vibrator should be
l
oc
at
ed
fr
o
m 1
/4
t
ht
o
1
/
3
rd
of the height of the hopper from
d
the dischar
g
e. For lar
g
e hoppers, hoppers with unusual
g
eometr
y
, or particularl
y
difficult material flow problems,
mu
mu
mu
lt
lt
lt
ip
ip
ip
p
le
le
le
le
v
v
v
v
ib
ib
ib
ib
ra
ra
ra
a
to
to
to
rs
rs
rs
m
m
m
ay
ay
ay
y
y
y
b
b
b
b
e
e
e
e
re
re
re
re
qu
qu
qu
q
ir
ir
ir
ed
ed
ed
.
Th
T
e
vi
vi
vi
i
i
brator
m
m
m
m
m
ount
in
n
n
n
n
g
plat
e
e
e
e
e
should
b
b
b
b
b
e skip
w
w
w
w
el
l
l
el
de
d
to
t
he
ho
h
pp
e
e
er
wall
u
u
us
u
u
in
g
g
g
a lo
w
w
w
w
h
y
dr
r
r
r
og
en
w
el
di
i
i
i
i
ng
g
r
od. I
f
re
e
in
f
fo
fo
rcem
en
e
t is
r
r
eq
eq
eq
q
uire
d,
,
,
i
t sh
ou
u
ou
o
o
ld b
e
e
e
e
e
s
s
sk
s
i
p
w
w
w
w
w
el
de
de
d
d
d, a
ls
s
o
o
o
o
o
o
wi
w
th
h
h
h
h
a low
h
h
h
yd
y
y
y
ro
ge
e
e
e
e
n
n
n
n
n
n
rod.
To
T
e
nsur
e
e
e
e
e
pr
r
r
op
o
o
o
o
er a
pp
li
c
ca
c
ti
on
on
n
n
n
n
n
n
and o
p
eration
o
f
f
f
f
f
NA
A
A
A
A
A
A
VCO
vi
v
b
b
br
b
b
ator
s,
,
,
N
AV
AV
AV
AV
AV
V
V
V
CO o
ff
f
f
e
er
s
s
s
s
a co
mp
mp
mp
mp
le
le
le
le
le
te
te
te
te
l
ine
o
of
o
o
o
o
s
ys
ys
ys
tem
ac
ac
c
c
c
ce
ce
ss
ss
or
o
i
i
i
ie
s.
T
he
B
B
H
3
3
ha
ha
a
h
s
s
a
a
3/
3/
8”
8”
”
N
PT
I
nl
nl
nl
nl
nl
n
l
et
et
a
a
nd
nd
t
he
re
fo
f
fo
f
f
re
e
ut
ut
t
t
t
t
t
t
il
il
i
iz
es
3
3
/8
/8
"
"
NP
NP
T
T
accessor
i
ie
s.
