Choosing quality equipment for pumping inflatable boats is not just a matter of convenience, but a critical stage in preparing for the season. Bravo 12 supercharger It has proven to be a reliable solution for PVC boat owners, combining affordable cost and sufficient performance for domestic use, and unlike its cheap counterparts, it can withstand long cycles of operation without overheating, which is especially valuable when pumping large boats.
Many water engines often confuse the concepts of "compressor" and "supercharger", but for the purpose of Bravo 12 It is characteristic of the principle of injection of large volumes of air at a relatively low pressure. The key feature of this model is the presence of a two-stage air supply system, which allows you to quickly fill the cylinders, and then get the necessary working pressure. Understanding this mechanics will help you operate the device more efficiently and extend its life.
In this article, we will discuss in detail the technical nuances, possible malfunctions and methods of their elimination. You do not have to wonder why the performance fell or how to connect the device to the battery correctly.
Technical specifications and design features
Aggregate Bravo B-12 It's designed for field use, and it's built on a solid plastic body that protects the internal machinery from moisture, splashes and mechanical damage, and it's got a DC motor and a turbine-type impeller inside. Productivity The device is about 400 liters per minute, which is the optimal indicator for boats up to 4-5 meters long.
The cooling system is an important element, and the engine is blown by its own flow of air that passes through the body. vent If you shut off air, the temperature of the engine windings will rise exponentially, which will lead to melting of the insulation, and the design also provides a reverse valve to prevent air from leaving the boat when the engine stops.
⚠️ Warning: It is strictly forbidden to close the exit nozzle or to squeeze the hose when switched on, which creates excessive pressure inside the housing, which can break the plastic joints or damage the impeller.
Power is provided from the onboard network 12 Volts. The current consumed in the maximum load mode reaches 12-14 Amperes. This means that for full operation a battery with a capacity of at least 45-50 A/h is required. The use of weak starter batteries from motorcycles is possible, but will lead to their rapid discharge. To connect, a standard connector with a fuse is used, which often comes with a set, but its quality sometimes leaves much to be desired.
To extend the life of the engine, take breaks every 15-20 minutes for 5-10 minutes, allowing the device to cool down.
The principle of operation of the two-stage system
Uniqueness Bravo 12 The compression chamber volume change mechanism is present on the case or in the kit (depending on the modification), in the high volume/low pressure mode, air is supplied as quickly as possible, filling the main volume of cylinders, which reduces the initial pumping time by several times compared to single-stage models.
When the cylinders are straightened and you need to get the pressure up to 200-250 mbar, the system switches to the second stage. productivity falls, but discharge-pressure Mechanically, this is done by changing the geometry of the airflow or switching channels inside the snail, and it's important for the user to understand that trying to pump the boat before the bell is only in the first stage is pointless - the engine will run idle without creating the right head.
- 🚀 First step: It provides a quick start, filling 80% of the volume in a short time.
- ⚓ Second step: necessary for the final inflating of cylinders and creating structural rigidity.
- 🔄 Switch: Often made in the form of a flap, which must be translated manually when moving to the final phase of pumping.
Some users modify the device by placing a pressure gauge on the output hose, which allows you to control the process more accurately without relying on tactile sensations. However, it is worth remembering that regular pressure gauges in cheap adapters often have a high error.
Connection scheme and power requirements
Proper connection is the key to a long life of your supercharger. Standard equipment often includes wires with clips "crocodile" and a plug. However, the length of regular wires is often insufficient, and the cross-section of the wire can be understated. Bravo 12, consuming up to 14 Amps, the minimum allowable cross-section of copper wire is 2.5 mm2, and it is better to use 4 mm2. Thin wires will warm and create a voltage drop, because of which the engine will not develop full power.
The circuitry is simple: red wire (plus) connects to the battery positive terminal, black (minus) connects to the negative. A polarity error for DC motors usually only leads to the impeller spinning backwards (the air will not go, but will be sucked), but in some models with electronics this can cause a short circuit. So follow the color marking.
Connection diagram:[Battery +] --- (Fuse 15A) --- [Red wire] --- (+) Supercharger
[Battery] -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Pay special attention to contacts. Crocodiles should sit tightly on battery terminals. Bad contact causes sparking and heating, which can melt the insulation. If you plan to use the pump often, it makes sense to make a stationary connector or use more reliable power connectors, such as large-diameter Tulips or specialized sea connectors.
⚠️ Warning: Never build up power wires longer than 2-3 meters without increasing their cross-section. Elongation with a thin wire will lead to a critical drop in voltage at the engine terminals and its combustion.
Typical malfunctions and diagnosis
Like any mechanical device, supercharger Bravo 12 The most common problem is a loss of performance or a complete failure. If the engine is buzzing but the air is not pumping, the most likely problem is leakage of the body or damage to the impeller, the plastic can eventually crack from vibration or impact.
The second common cause is oxidation of contacts inside the engine or on the brushes. When moisture is ingested (even as fog), copper contacts are covered with oxide film, resistance increases, and current ceases to flow to the windings, in which case you need to disassemble and clean the contact group with alcohol or special chemistry.
| A symptom. | Probable cause | Elimination method |
|---|---|---|
| The engine won't start. | AKB discharged or chain break | Check the voltage, ring the wires. |
| Strong noise and vibration | Wear of bearing or balancing | Bearing replacement or lubrication |
| Low pressure at the exit | Leaky body or impeller wear | Seam sealing, turbine replacement |
| Heating the hull | The vents are clogged. | Dust and fluff cleanup |
Diagnosis should begin with checking the voltage at the pump input with the engine on. If the voltmeter shows less than 10-11 volts, the problem is with the battery or wires, not with the pump itself. Only after making sure that the power is normal, you should start disassembling the mechanical part.
The secret to quiet work
If your pump is starting to hum more than usual, try disassembling the body and lubricating the engine shaft with high-temperature lubrication (such as the Litol-24), often this removes extraneous sounds and prolongs the life of the bearing for several seasons.
Instructions for self-repair
Repairs Bravo 12 It's very easy for someone with basic tool skills to do this, and first you have to remove the screws that connect the halves of the body, and usually there are 4 or 6 of them, and they can be hidden under decorative plugs, and then you have access to the electric motor and the turbine, and then you have to look carefully. pellet Even a microcrack can upset the balance and cause a beating.
If the electrical problem is a soldering iron, often vibrations will cause the wires to fall off the engine brushes, they need to be soldered back carefully, keeping polarity in mind. If the winding is burned, it is easier to replace the entire engine with a similar size and voltage than to try to rewind it at home. To seal the body after assembly, use silicone sealant, applying it in a thin layer at the joints.
☑️ Checklist before pump assembly
When you build, it's important not to pull the screws over. The plastic in the hull is quite fragile, and the excessive force will cause cracks around the mounting holes. Curl the screws cross-cross, gradually tightening them. After assembly, test launch without connecting to the boat to make sure there are no extraneous sounds and vibrations.
Rules of operation and storage
And supercharger Bravo 12 You've been in the service for years, and you have to follow the rules of operation, and the main one is moisture protection. Despite the water resistance, you don't have to immerse the pump in water or leave it in the rain. Water that gets inside, washes the lubricant out of the bearings and causes the contacts to corrosion. After use on water, be sure to wipe the body with dry rags.
Store the device in a dry place, at room temperature. Do not leave the pump in the cold or in direct sunlight. Ultraphylet destroys the plastic, making it brittle, and frost can lead to cracking of the pipes. Before long storage (for the winter), it is recommended to lubricate the moving parts and blow the body with compressed air to remove dust.
- 🧼 Cleanup: Clean the air vents from dust after each trip.
- 🔋 Food: Do not allow a deep discharge of the battery during the pumping process.
- 🧊 Temperature: Do not store the device at temperatures below -10°C without special packaging.
⚠️ Warning: If the pump has been in salt water, it must be washed with fresh water and thoroughly dried, causing instant corrosion of the metal parts of the engine.
Thermostat storage and water protection are two of the main factors that determine the life of the Bravo 12 supercharger.
FAQ: Frequently asked questions
Can you use Bravo 12 to pump SUP boards?
Yes, but with limitations. SUP boards require high pressure (up to 1.0-1.5 bar), and Bravo 12 The pump can gain the bulk, but it will have to be pressured to a rigid state by hand or by a special high pressure pump, and an attempt to force the process can lead to overloading of the engine.
Which battery is best for this pump?
The best choice would be a traction gel battery (GEL) or AGM with a capacity of 50 A/h. They are better able to tolerate current loads and deep discharge compared to starter acid batteries. It is important that the voltage is exactly 12 volts.
Why did the pump stop pumping after winter?
It's likely that the lubricant in the bearings has dried up or the contacts have oxidized, and it's also possible that the plastic in the case has caused a micro-crack from temperature changes, and the leakage has been broken, and preventive maintenance is required: lubrication, cleaning and integrity checks.
Can the pump be connected directly to the vehicle’s on-board network?
Technically, it is possible, but it is not recommended to do this with the car engine shut down for more than 15-20 minutes, so as not to discharge the starter battery. It is better to start the car engine periodically during the pumping of the boat. Also make sure that the cross-section of the wires in the lighter will withstand a current of 14 Amps (usually the regular wires are thin, it is better to use the terminals on the battery).