Air Knocker Air Knocker (Direct Impact)
Product Overview
The Air Knocker (Direct Impact Type) uses compressed air to drive a piston that delivers powerful impacts to the equipment surface. These impacts effectively prevent material buildup, bridging, and clogging of powders and bulk solids. Requiring only a compressed air supply, it offers a safe and cost-effective solution for maintaining smooth material flow.
Its versatile design allows use on fixed or moving targets and offers flexible installation options. It can also be applied to many of the same applications as the Air Knocker (Indirect Impact Type), expanding installation and operating options.
Key Features
Air Knocker Operating Principle
1. Compressed air supplied to the Air Knocker first enters the valve chamber, where it pushes the mushroom valve downward and accumulates in the pressure chamber. 2. When the three-way valve is activated, the air in the valve chamber is exhausted, allowing the compressed air in the pressure chamber to lift the mushroom valve. 3. The movement of the mushroom valve releases the compressed air in the pressure chamber, driving the piston downward at high speed to strike the base surface. The resulting impact force effectively eliminates material buildup, bridging, and clogging of powders and bulk solids.
Compact and Lightweight Design
The RKD-PB Air Knocker delivers the same performance and tank capacity as the previous model while featuring a more compact and lightweight design.
An aluminum die-cast cylinder reduces weight, while a resin sleeve improves wear resistance and durability for longer service life.
Adjustable Impact Force
The Air Knocker series uses a unique mushroom valve mechanism to adjust impact force simply by changing the air pressure. Higher pressure increases impact force for stubborn material buildup and blockages, while lower pressure reduces impact and noise.
This flexibility helps optimize performance and can often compensate for over- or under-sizing during equipment selection.
Relay Piping for Multiple Air Knockers
The Air Knocker series supports relay piping, allowing a single control panel to operate one or multiple Air Knockers simultaneously.
This simplifies installation and enables efficient operation across multiple locations.
Oil-Free and Environmentally Friendly
The Air Knocker features oil-free operation, requiring no lubricators or oil supply maintenance. This reduces operating costs, simplifies maintenance, and supports a cleaner working environment.
Simple Structure and High Durability
The Air Knocker series has achieved over 1 million impact cycles in durability testing (excluding the RKD120P model). Its simple, robust design minimizes maintenance requirements and reduces the need for spare parts.
Proven through years of successful field operation, the series is recognized for its exceptional reliability, long service life, and virtually maintenance-free performance.
Powerful Impact for Severe Blockages
With approximately twice the impact force of the RKD100PA, RKD120P provides powerful performance for eliminating material buildup and blockages in hoppers, silos, and chutes.
Wide Range of Air Knocker Models
Choose from six Air Knocker models to suit your specific application requirements.
Air Knocker Installation Method
* To prevent accidental falling, secure the unit using the supplied safety wire and shackle. Be sure to secure the threaded section of the shackle with safety wire to prevent loosening.
* Position the mounting bracket so that the safety wire remains taut when installed.
* RKD120P is supplied with a safety chain. Pass the shackle of the supplied safety chain through the mounting hole on the unit and secure it with the cotter pin provided to prevent accidental disengagement.
Models
| Model | Item Code | Downloads |
|---|---|---|
| RKD30PB | 001697000 | Downloads |
| RKD40PB | 001699000 | Downloads |
| RKD60PB | 001701000 | Downloads |
| RKD80PA | 000694000 | Downloads |
| RKD100PA | 000695000 | Downloads |
| RKD120P(Bolt Set Included) | 001691000 | Downloads |
| RKD120P Base | 001712000 |
* Mounting base included as standard.
* For the RKD120P, the unit body and mounting base (base reinforcing rib) are sold separately.
Downloads include instruction manuals and drawings. Contents may vary depending on the model.
Specifications
Air Knocker (Direct Impact)
Metric
| Model | Working Pressure (MPa) | Stroke Cycle (times/min) | Air Consumption (L/times(ANR)) | Stroke Energy (N・m) | Impulsive Force | Weight (kg) | |
|---|---|---|---|---|---|---|---|
| (kg・m/s) | Equivalent Hammer Weight (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 | Equivalent to RKD100PA X 2 | 52.6 | |
Imperial
| Model | Working Pressure (PSI) | Stroke Cycle (times/min) | Air Consumption (cf/time) | Stroke Energy (lbf ・ft) | Impulsive Force | Weight (lb) | |
|---|---|---|---|---|---|---|---|
| (ft・lbf/s) | Equivalent Hammer Weight (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 | Equivalent to RKD100PA X 2 | 116.0 | |
* Reinforcing ribs are included as standard on models RKD60PB and above, while wires and shackles are standard equipment on all models.
* Weight includes the base.
* For RKD120P, safety chain is included but not installed at the factory. Please ensure that it is properly installed before use.
* Base reinforcing ribs for RKD120P are supplied with the base. Please weld and install them on site.
* For RKD120P, the main unit and base (including base reinforcing ribs) are sold separately.
