The inflatable boat starts operating long before the first burst of oars on the water, and the most critical stage here is the preparation of the hull. Many owners make the mistake of believing that the pumping process is trivial, but it is the wrong pressure that causes premature wear of the seams or, conversely, insufficient stiffness on the wave. Inflatable boat It is a complex engineering structure where every centimeter of fabric and every seam is under tremendous tension.
The question of how to properly pump a trans-PVC boat requires an understanding of the physics of the materials and the design features of a particular vessel. turret It sets the geometry of the stern, which must withstand the weight of the motor and the vibrational loads that arise when moving. If the sides are inflated poorly, the boat will "walk" on the water, losing its driving qualities, and excessive pressure in the heat can lead to tissue rupture.
In this article, we will discuss all the nuances of working with pressure-valveWe'll choose the right pump and determine the optimal parameters for your model, and the right training will ensure not only a comfortable fishing, but also a long life of yours. PVC boat.
⚠️ Warning: Never leave a fully pumped boat in direct sunlight unattended - heating the air inside the cylinders can lead to a critical excess of working pressure.
Choosing the Right Equipment for Pumping
The first step to success is choosing the right source of compressed air. The market offers a variety of solutions, from simple foot furs to high-tech electric compressors. For transom boat owners, who often use powerful motors, the rigidity of the bottom and cylinders is critical, so manual labor here can be inefficient.
The most popular solution remains double-pumpThe first chamber allows you to quickly fill the volume with air at the initial stage, when the resistance is minimal, and the second chamber, which has a smaller volume, is designed to create the high pressure necessary for the final rigidity of the structure.
- 🔹 The foot pump is a classic solution that allows you to control the process with your feet, leaving your hands free to hold the hose.
- 🔹 Electric 12V compressor – connects to the battery of a car or boat, significantly speeds up the process, but requires pressure control with a pressure gauge.
- 🔹 Manual piston pump is a compact and reliable option, often included, but requiring significant physical costs.
When choosing an electrical device, pay attention to the availability of auto-disconnection. Although you can not rely on automation completely, it serves as a good insurance against pumping. NDMA The presence of a powerful compressor becomes not just a convenience, but a necessity.
Preparation of the boat and pumping places
Before you plug in the pump hose, you need to properly prepare the place for the layout of the vessel. The surface must be flat, clean and free of sharp objects, stones or spiny vegetation. Even a small knot can damage the fabric under tension that will occur during the pumping process.
Spread all folds of fabric by hand, make sure the valves are open and ready to work. If the boat was stored in a cold room, let it lie spread out at room temperature for at least 20-30 minutes. Frost resistance of PVC high, but in the cold the material becomes rigid and less elastic, which increases the risk of microcracks with a sharp straightening.
It is important to check the status of coatboard Make sure that the fasteners do not have sharp edges that could damage the cylinders from the inside when they are blown up. Insert the transomboard in your pockets, but do not fix it rigidly, if the design allows, to give the fabric of the cylinders evenly distributed.
If you are pumping a boat on asphalt or concrete, be sure to put an old blanket or special bedding under the bottom to avoid overheating of the fabric from the hot surface and mechanical damage.
Phased pumping technology for cylinders
There's a very rigorous algorithm that can cause a skewed design, and you always pump the bow and aft and the side cylinders into a state of light elasticity, and you can straighten all the internal partitions and seams, removing the folds that can be rubbed later.
In the second stage, the final pumping to the working pressure is performed, and it is important to follow the sequence specified by the manufacturer in the product passport, usually first brought to the normal side, then the bow, and lastly, the keel or inflatable floor, if present.
⚠️ Attention: When pumping a boat with an inflatable floor (NDND), be sure to completely inflate the cylinders first, and only after that start pumping the bottom, otherwise the structure may deform.
Use of use gauge It is almost impossible to determine the pressure of 200-250 mbar on the eye, which is the value required for most recreational models. For serious fishing boats, the pressure can reach 280-300 mbar, which ensures glides with a heavy motor.
☑️ Boat pumping procedure
Operating pressure and temperature adjustments
Understanding the physics of gases is essential for every owner. PVC Gay-Lussac's law says that at a constant volume, the pressure of the gas is directly proportional to its temperature, which means that a boat pumped in a cool garage in the sun can become rock solid and even burst.
The pressure is the pressure specified in the instructions, but adjusted for operating conditions. If you pump the boat in the shade and swim in the open sun, it is better to under-pump the cylinders on 0.1-0.2 atmosphere. During the heating process, the air will expand, and the pressure will return to normal.
Below is a table of indicative pressure values for different types of boats and conditions:
| Type of boat/Element | Pressure (atm/bar) | Pressure (psi) | Features |
|---|---|---|---|
| Board (cruising) | 0.20 - 0.25 | 3.0 - 3.6 | Basic rigidity |
| Airboard (engine) | 0.25 - 0.30 | 3.6 - 4.3 | For glistening |
| inflatable floor (NDB) | 0.30 - 0.40 | 4.3 - 5.8 | High rigidity |
| Inflatable keel | 0.30 - 0.45 | 4.3 - 6.5 | To improve progress |
Remember that work pressure It's not a static value, it's a dynamic parameter. In cold autumn weather, when the water and air temperatures are low, the pressure in the cylinders will drop, so always check and pump before you go out.
Features of working with high pressure valves
Modern boats are equipped with valves of the type Bravo Or their analogues, which have two positions of operation: "Pump" and "Work." In the "Pump" position, the valve petal is open, and the air comes out when you try to compress, which is convenient for rapid blowing, in the "Work" position, the valve locks and holds high pressure.
A common mistake is to misplace the pump adapter, and many users simply insert the nose into the hole without turning it, and this causes the hose to kick out at high pressure, and some of the air to go to waste, and the right technique requires that the adapter be inserted and turned clockwise before fixing.
- 🔹 Always check for debris or sand inside the valve before connecting to the pump - the grains of sand can break the tightness.
- 🔹 Use a lubricant for rubber pump seals to make it easier to spin and prevent rubber from drying out.
- 🔹 After the hose is disconnected, quickly close the valve cap to prevent moisture and dirt from getting inside.
If you use an electric pump with different nozzles, make sure that the nozzle chosen fits tightly to the valve neck. A loose fit will lead to the whistling of the outgoing air and loss of compressor performance.
What do I do if the valve poisons?
If you hear a hissing after pumping, try pressing the central valve stem several times with your finger - sometimes a small moiety gets in there, which prevents tight closure. If this does not help, disassemble the valve (usually it is twisted with a special key) and rinse it with warm water.
Quality control and final inspection
Once the pressure is reached, you need to do a visual and tactile inspection, run your hand over the seams, they should be smooth, without bloating or wrinkling, pressing your finger on the cylinder should feel elastic, but not "stone."
Pay special attention to the area of attachment transomWith the cylinders fully pumped.