Direct impact type hammering equipment for expanded applications
This product is used for the following applications:
01Food factory: RKD is used to remove the chocolate from the mold in chocolate factory
02Elimination of adhesion on wall surface in rotary drier
03Removal of extra paint in powder paint
04Prevention of adhesion on wall surface of workpiece for furnace, knocking off of weld spatter, prevention of adhesion on workpiece on mesh in drying furnace
05Used for inscription
06Used for telescope enforcement
07Removal of water on base
Used in the following places:
Features
The Air knocker series (direct impact type) are unique equipment in which the force of compressed air causes the piston to strike the hopper wall surface directly and energetically, which eliminate the adhesion or clogging of powder. In addition, this knocker is excellent in safety and economics because it can be used only by air supply, and it can be used safely for powder that has a characteristic to show adhesion when receiving the centrifugal force. While the indirect impact type strikes the mounted knocker base at a predetermined position, the air knocker is used in wider range of applications on your idea, such as striking the moving object and striking the target with the knocker itself moved. It is also used like the indirect impact type.
Operating principle of Air knocker
1. The compressed air flowed into the knocker is first supplied to the valve chamber to depress the mushroom valve and then is stored in the accumulator.
2. When the three-way valve is actuated to exhaust the air from the valve chamber, the compressed air in the accumulator moves the mushroom valve upward.
3. When the mushroom valve moves, the compressed air in the accumulator depresses the piston energetically, which strikes the base surface. That impact force eliminates the adhesion or blockage of powder.
Achieved miniaturization and weight reduction
Relay knocker RKD-PB has achieved miniaturization while maintaining the same tank capacity as the old model. In addition, the weight has been reduced by changing the cylinder to aluminum die casting.
Air knocker impact force can be changed only by adjusting the supply air pressure.
Can be operated multiple air knocker units with using relay piping mechanism.
ECO-friendly / Oil- free operation
Excellent durability and simple structural design
World largest class air knocker RKＤ120P for big hopper, silo and etc. (mining, feed grain, steel works etc.)
Wide range Air Knocker models
Air knocker installation method
List of models
Model
Code Number
RKD30PB
001697000
RKD40PB
001699000
RKD60PB
001701000
RKD80PA
000694000
RKD100PA
000695000
RKD120P（Bolt and nut set)
001691000
RKD120P (Mounting base)
001712000
※RKD120P mounting base is sold separately.
Specification
RKD (Normal piping)
Model
Working Pressure
(MPa)
Stroke Cycle
(times/min)
Air
Consumption
(L/times(ANR))
Stroke
Energy
(N・m)
Impulsive Force
Weight
(kg)
(kg・m/s)
Converts into
Hammer pound
(lb)
RKD30PB
0.3-0.7
1-60
0.05-0.13
5.5-13.1
1.2-1.8
Below 1
1.7
RKD40PB
0.15-0.37
9.2-22.3
2.6-4.0
1-1.5
4.8
RKD60PB
0.33-0.77
20.6-49.0
6.9-10.6
1.5-3.0
10.7
RKD80PA
0.60-1.40
45.1-109
15.2-23.7
3-8
18.4
RKD100PA
0.98-2.28
82.4-201
30.0-46.9
6-15
35.5
RKD120P
1-6
3.32-6.64
131-321
52.0-84.0
Twice size of
RKD100PA
52.6
(Imperial System)
Model
Working Pressure
(PSI)
Stroke Cycle
(times/min)
Air Consumption
(cf/time)
Stroke Energy
(lbf ・ft)
Impulsive Force
Weight
(lb)
(ft・lbf/s)
Converts into
Hammer pound
(lb)
RKD30PB
44-102
1-60
0.002-0.005
4.1-9.7
8.7-13.0
Below 1
3.7
RKD40PB
0.005-0.013
6.8-16.4
18.8-28.9
1-1.5
10.6
RKD60PB
0.012-0.027
15.2-36.1
49.9-76.7
1.5-3.0
23.6
RKD80PA
0.021-0.049
33.3-80.4
109.9-171.4
3-8
40.6
RKD100PA
0.034-0.080
60.8-148.3
217.0-339.2
6-15
78.3
RKD120P
1-6
0.117-0.234
96.6-236-8
376.1-607.6
Twice size of
RKD100PA
116.0
*The reinforcement rib is included in RKD60PB or upper models as standard, and wire and shackle are included in all models as standard.
*The weight includes that of base.
*RKD120P model is not equipped a fall prevention wire to the body. Please be sure to install them before using.
*Mounting base of RKD120P is including reinforcing ribs. Please weld this ribs to the mounting base when using.
*RKD120P mounting base is sold separately.
Dimensions, installation, control panel
Product dimensional drawings
Product dimensional table
Model
φA
φC
D
φE
F
G
H
I
φJ
φK
ST
L
M
O
RKD30PB
62
70
8
17.0
38
Rp1/8
90
(25)
9
55
17
50
100
Rp1/4
RKD40PB
78
95
12
25.0
55
134
13
70
25
75
150
RKD60PB
105
138
14
35.0
65
171
15
110
35
90
200
Rp3/8
RKD80PA
146
148
16
47.5
60
Rp1/4
222
(28)
17
120
40
Rp1/2
RKD100PA
175
208
20
54.5
50
270
21
170
50
250
Rp3/4
RKD120P
220
235
21
68.0
43
326
17.5
198
74
300
2-Rp3/4
(Imperial System)
Model
φA
φC
D
φE
F
G
H
I
φJ
φK
ST
L
M
O
RKD30PB
2-7/16
2-3/4
5/16
43/64
1-1/2
Rp1/8
3-47/64
(63/64)
23/64
2-11/64
43/64
1-31/32
3-15/16
Rp1/4
RKD40PB
3-5/64
3-47/64
15/32
63/64
2-11/64
5-9/32
31/64
2-3/4
63/64
2-61/64
5-29/32
RKD60PB
4-9/64
5-7/16
35/64
1-3/8
2-9/16
6-47/64
19/32
4-21/64
1-3/8
3-35/64
7-7/8
Rp3/8
RKD80PA
5-3/4
5-53/64
5/8
1-7/8
2-23/64
Rp1/4
8-47/64
(1-7/64)
43/64
4-23/32
1-37/64
Rp1/2
RKD100PA
6-57/64
8-3/16
25/32
2-9/64
1-31/32
10-5/8
53/64 6
6-11/16
1-31/32
9-27/32
Rp3/4
RKD120P
8-43/64
9-1/4
53/64
2-43/64
1-11/16
12-53/64
11/16
7-51/64
1-27/32
11-13/16
2-Rp3/4
Wire＆Chain assembly dimensional drawings
Wire assembly Dimension Table
Model
φA
B
RKD30PB
2
195
RKD40PB
390
RKD60PB
3
465
RKD80PA
430
RKD100PA
4
500
Reinforcing plate dimensional drawings
Reinforcing plate dimensional table
Model
Circular reinforcing plate
Square reinforcing plate
φA
B
RKD30PB
φ150×t3.2(3)
□150×t3.2(3)
20
26
RKD40PB
φ200×t3.2(3)
□200×t3.2(3)
20
40
RKD60PB
φ300×t4.5(4)
□300×t4.5(4)
20
50
RKD80PA
φ400×t4.5(4)
□400×t4.5(4)
25
60
RKD100PA
φ500×t6.0(6)
□500×t6.0(6)
25
70
RKD120P
φ600×t9.0(9)
□600×t9.0(9)
30
80
*The symbols in parentheses indicate the value of the stainless steel.
Installation method
Tightening torque table(mm) Unit: Nm
Nut size
＊M6
M8
M10
M12
M14
M16
M20
Tightening
torque (N･m)
Lower nut
＊4.8
10.8
20.6
35.3
56.9
84.3
167
Upper nut
＊4.8
7.6
14.4
24.7
39.8
59
117
Tightening torque table(mm) Unit: Nm
Nut size
＊M6
M8
M10
M12
M14
M16
M20
Tightening
torque (N･m)
Lower nut
＊3.54
7.97
15.19
26.04
41.97
62.18
123.18
Upper nut
＊3.54
5.61
10.62
18.22
29.36
43.52
86.30
*When fix knocker unit and base with attached bolt, pay attention to the clamp torque.If the clamp torque is not enough, the bolt may be loosened by percussion of the knocker.
*To prevent fall down, suspend the knocker unit by the suspender wire and the shackle.
