Choosing the right equipment to pump an inflatable vessel is not just a matter of convenience, but a critical stage in preparing for the water. Many beginners underestimate the effect of air and water temperature on the volume of gas in cylinders, which leads to unpleasant surprises in the middle of the reservoir. tool allows you to quickly bring the craft into working condition without unnecessary physical costs and the risk of damaging the material.
The modern market offers many solutions, from classic foot furs to high-tech electric compressors with automatic shutdown. Each type has its advantages, but also limitations in performance and autonomy. In this article, we will discuss in detail which device is suitable for your situation, whether it is fishing away from civilization or a comfortable holiday on the base with access to the electricity grid.
Particular attention should be paid to pressure control, as the pumped side in the sun can burst, and the under-pumped side can deform and reduce driving performance. Understanding the physical processes and technical specifications of pumps will allow you to avoid fatal errors. Below we will discuss the main types of devices and the nuances of their application.
The main types of pumps for inflatable boats
The first thing that a PVC boat owner encounters is a variety of air-delivery devices, all of which are mechanical, requiring the application of muscle power, and electrical, powered by an external source of energy. foot They're very simple to build, they're very independent of batteries, and they're ideal for long-distance trips where you can't recharge the battery.
Electric models are very quick, especially on large boats with multiple compartments, but their efficiency is directly dependent on the battery capacity and the performance of the motor itself. productivity This is measured in liters per minute and this parameter determines how long it will take to start the initial pumping before the operating pressure is set.
There are also combination models that combine the advantages of both types, such as some electric pumps that have manual operation in case of battery discharge, and the choice of a particular device depends on the frequency of use of the boat, its size and operating conditions.
- 🔌 Electric pumps are ideal for recreation centers and owners of boats with onboard network.
- 🦶 Foot pumps are reliable, cheap and do not require maintenance, but time-consuming.
- 🔋 Battery compressors are mobile and convenient, but have a limited charge life.
- 🚗 Car models - work from a lighter, convenient for delivering a boat to the water by car.
⚠️ Warning: Never use high-pressure industrial compressors without a gearbox and pressure gauge. The pressure in the tires of the truck (6-8 atmospheres) is guaranteed to tear the side of the PVC boat, designed for 0.2-0.3 atmosphere.
Mechanical pumps: reliability and autonomy
Mechanical devices remain classics of the genre due to their indestructible design. A foot pump. It's a bellows that are compressed by a person's weight, and it allows you to use large muscle groups and develop enough force to create the necessary pressure in the final stage of the pumping, and these devices rarely break down because there's nothing to break in them.
Manual versions, resembling bicycle pumps, are less efficient for large volumes. They require considerable effort and time, so they are more often used as an emergency option or for pumping individual elements, such as: kielson But modern dual-acting models (which deliver air as the rod runs up and down) are doing pretty well.
The main advantage of mechanics is that it is completely independent of weather conditions and power sources. Even if the pump is wet or falls into the water, it will continue to work after drying. For small single or double boats, this is often the only tool necessary.
When using a foot pump in hot weather, try not to put it on the hot sand or the side of the boat - the plastic can deform, and the valves - stick.
But you have to consider the human factor. After you pump a large three-seater boat, you may not have the strength to assemble gear or fish, so for larger models, mechanics are better considered only as a backup option.
Electrical pumps and compressors
Electrifying the pumping process is a step towards comfort. pump They can pump a boat 3-4 meters long in 5-8 minutes, they run on 12-volt batteries, which can be car batteries, boat batteries or built-in lithium-ion batteries, the key characteristic here is the current consumed and the amount of air pumped.
Many advanced models have built-in pressure gauges and automatic shutdown. You set the required pressure, like 250 mbar, and the device stops working on its own when it reaches the target. This eliminates the risk of pumping, which is especially relevant in sunny weather. stop-and-stopIt responds to a pressure surge in the system.
It's important to remember that you're using energy. A powerful pump can consume current up to 15-20 Amps. When you use a car battery, it can cause it to run deep, which is critical for starting the car engine after fishing. So always control the power supply.
| Type of pump | power supply | Productivity (l/min) | Max. pressure (mbar) |
|---|---|---|---|
| Foot. | Muscle power | 300-500 | Depends on the effort. |
| Automotive | 12B (lighter) | 30-50 | 350-400 |
| Battery | Li-Ion battery | 150-300 | 250-300 |
| Fixed 12B | AKB 12B | 400-600 | 500+ |
For boats over 3.5 meters long, the use of an electric pump is not just a convenience, but a necessity for saving strength and time.
Calculation and control of cylinder pressure
Pressure is the main parameter that determines the rigidity and safety of the boat. The instructions for each product indicate the nominal working pressure, usually between 200 and 300 mbar (0.2-0.3 atm), exceeding this value leads to rupture of the seams, and decreases - to loss of shape and deterioration of driving performance. gauge.
You have to take into account Gay-Lussac's law: when you heat up, the gas expands. If you pump the boat in the morning at +15 ° C, and the temperature rises to +30 ° C in the afternoon and the sun shines, the pressure in the cylinders will increase on its own, in such cases, it is recommended to pump the boat to a slightly lower value or periodically blow excess air through the valve.
The opposite is true when you go out into cold water, and a boat that's pumped in a warm garage, it shrinks in cold water and it's soft. So always bring a pump for rapid pumping before you go out. The ideal solution is to have a pressure gauge on the pump itself or a separate pressure gauge on the pump. measuring-measurement.
⚠️ Warning: If you pumped the boat indoors or in the shade and then carried it out in direct sun, be sure to check the pressure after 10-15 minutes. Excessive pressure can disperse the seam of the transom, which will lead to expensive repairs.
Nuances of use depending on temperature
The temperature changes the way PVC is used. In the cold, polyvinyl chloride becomes less elastic and stiffer. A boat that is pumped in the cold may seem underpumped, but when it is skidded into a warm room, it will increase in volume. So in winter, you should not aim for maximum pressures immediately.
In summer, on the contrary, the material becomes softer, but the risk of overheating of the air inside the cylinders increases many times. Black cylinders heat up more than light ones, which must be considered when choosing the color of the boat for hot climates. heat-reflecting Dousing the boat regularly or dousing it with water helps stabilize the temperature.
It's also important to keep an eye on the temperature of the pump itself. Electric models get very hot when they're running for a long time. If the device gets hot, take a break so you don't melt the plastic gears or damage the insulation of the wires.
- ❄️ In winter, avoid sharp excesses of hoses - plastic bluffs and can crack.
- ☀️ In the summer, check your blood pressure every 30-40 minutes of sun exposure.
- 🌡️ Do not leave a pumped boat in direct sunlight unattended.
Maintenance and care of pumping equipment
To keep the pump running for a long time, it needs to be properly maintained, and after every use, especially on a sandy-bottom pond, you need to clean the air intake holes of dust and sand, and getting abrasive particles into the mechanism will quickly disable the piston group or impeller.
Store equipment in a dry place, protecting from direct sunlight. Ultraviolet destroys plastic and rubber seals. Before long storage (for the winter), it is recommended to lubricate the moving parts of mechanical pumps with silicone grease, and electric ones - to dry and remove batteries.
Regularly check the integrity of the hoses and tightness of the joints. Cracks on the hose can negate the entire performance of the pump. You can use special remixes or glue for PVC to repair minor damage.
☑️ Daily pump care
Frequently Asked Questions (FAQ)
Can I pump a boat with a tire compressor?
It's not recommended to use a conventional car compressor for tires, because they're designed to create high pressure in a small volume, and a boat needs a lot of air at low pressure, and they're going to run at their limits, they're going to overheat quickly, and they can burn up without pumping the boat to the right state.
What pressure is normal for a PVC boat?
The pressure specified in the data sheet of a particular model is considered normal, usually in the range of 200-300 mbar (0.2-0.3 atm). To the touch, the board should be hard, but with a strong press of the finger, slightly grind.
Why did the electric pump stop pumping at full speed?
It's probably the heat shield that's gone off because of overheating, or the battery's gone, and it's possible that the inlet filter will clog, let the device cool, check the battery charge, and clean the filter of dust.
Can I leave the boat full overnight?
You can leave the boat pumped overnight, but only in the shade and at a stable temperature, if it gets cold at night, the pressure will drop and the boat will become soft, if the sun comes out in the morning, the pressure will rise sharply, you better blow the boat away or at least blow some air.