A situation where you find that your flyboat It's very low pressure, it's always unpleasant, especially when it's in the middle of a fishing trip or just before you go out into the water, and it's not the puncture in the tank that's most often the culprit. air-valveIt's not sealed, and understanding how the node works and knowing the algorithm will help you quickly fix the problem without going to the service center.
In most cases, it's early to panic: pollution, a grain of sand, or a simple lack of lubrication can be the reason why the valve is poisoning. lack of pressure This article will deform the soldering of the seams and reduce the performance of the vessel, and in this article we will discuss all the stages of diagnostics, cleaning and replacement of seals.
The first thing you need to do when you detect a leak is to do a thorough visual and tactile diagnosis. Don't rush to disassemble the mechanism right away, sometimes the problem is solved by a simple cleaning. Blow on the valve or apply a soap solution to make sure that the air is coming out through it, not through a microcrack in the tissue next to the sticker. If the bubbles are coming out of the center, then the problem is inside.
A common cause is elemental pollution: sand, silt, or small grass can get between the movable leg of the valve and its landing site, breaking the tightness. Try pressing the center part of the valve several times with your finger to knock out any debris. If this does not help, more serious intervention will be required.
It's important to understand that different manufacturers use different designs, from simple petal to complex screw mechanisms with threads. Badger, Flagship or hunter You can see the Bravo or Brig valves, which have their own disassembly features, and before you use the tools, you can determine the type of shut-off device you have.
⚠️ Attention: Never use sharp metal objects (knives, stitches) to pick inside the valve. You risk scratching the landing saddle or damaging the rubber seal, after which the valve will have to be changed completely.
If the external cleaning fails, we move on to the next step: make sure the boat is completely deflated or in a state convenient for operation; for accurate diagnosis, you may need to remove the top valve cover if it unscrews; in some models, this is done manually, in others, it requires a special key.
Types of valves and their features
The inflatable boat market is dominated by several basic types of lock-in valves, and understanding their design is key to successful repairs. petal-valveIt's simple, it's reliable, but it's prone to clogging, and it's pumped through a central rod, and it's held by the pressure of the air pressing the petal.
More complex systems such as Bayard or NavixThey're often screwed, and they screw the movable part into the body, so it's tighter, and they're less likely to get smeared spontaneously, but they require periodic grease of the thread, and if the screw valve lets air in, the most common problem is the wear of the sealing rubber.
There are also combinations where the petal is supplemented by a screw-mounted fixator, which allows you to put excess pressure on the heat in the sun without opening the valve completely. reinforced PVC) such systems are preferable because they are better able to withstand temperature variations.
When choosing a remix, it's important to know not only the name of the boat brand, but also the size of the valve. They can differ in diameter and height of the stem. There's no universal solution here: if you put a valve with a smaller diameter, it just falls inside the cylinder, and too large will not stand in the hole.
Tools and materials for repair
To restore tightness, you'll need a minimal set of tools, and the rule of thumb is to use only materials that are compatible with PVC. Aggressive chemistry can dissolve plastic or make rubber seals brittle.
Here is a list of what to do before starting:
- 🔧 A special key for unscrewing the valve (often in a remix or sold separately).
- 🧼 Soap solution in a spray gun to look for leaks.
- 🧽 Clean rags and a soft brush to remove dirt.
- 💧 Silicone lubricant or special valve formulation (do not use WD-40 oil-based!).
And you have to pay special attention to lubrication, and many newcomers try to use car oils or solidol, which is absolutely not possible. Petroleum products break down the structure of PVC and rubber. Perfect. silicone lubricantIt retains the elasticity of seals and is not aggressive to plastic.
If you don't have a special key at hand, and the valve is screwed, you can carefully use the passages with soft sponges, but there is a high risk of tearing the thread or damaging the plastic.
If you're planning a valve replacement, you'll also need PVC glue (two-part polyurethane) and a degreaser. The process of sticking a new valve takes time to dry, so plan the repairs ahead of time, not before the trip itself.
Step-by-step instructions: cleaning and maintenance
If the test shows that the valve is poisoning because of dirt, it needs to be serviced, which takes a little time, but requires care. First, completely blow the air out of the cylinder to relieve stress from the fabric.
Follow the algorithm further:
- Unscrew or remove the central part of the valve (stack with a spring and petal).
- Carefully rinse the inside of the valve body with water, removing all the sand and silt.
- Examine the rubber seal (gassing) for cracks or deformation.
- Apply a thin layer of silicone lubricant to the moving parts and the seal itself.
- Collect the valve in reverse order and check the tightness with a soap solution.
☑️ Check-list of valve maintenance
It often happens that after cleaning and lubrication, the valve stops etching, but if the rubber gasket has lost elasticity or you can see deep furrows on it, cleaning will not help, in which case you need to replace the seal or the entire valve assembly.
When you build screw valves, it's important not to pull the thread. Excessive force can cause the plastic to burst, or the valve to jam, and you can't open it next time. Wrap it all the way from the arm, without using tools to pull it out.
Replacement of valves: when cleaning does not help
If maintenance fails, the mechanism or the seat is damaged, and the valve replacement is a more complex procedure that requires glue handling, and you'll need a new valve that matches the diameter of the hole in your boat.
The replacement process includes the following steps:
- 🔪 Careful removal of the old valve (if it does not spin).
- 🧹 Cleaning and degreasing of the sticker place on the cylinder.
- 🖌️ Applying glue on both surfaces (a balloon and a new valve).
- ⏳ Pause for polymerization (according to the instructions for glue).
- 🔩 Installation and rolling of a new valve.
And the most critical moment is temperature-gluePVC glue can only be glued at temperatures above 15°C, in a dry room, and an attempt to repair it in the cold or in high humidity is guaranteed to detach the valve after a few days.
What to do if the old valve does not turn?
If the screw valve is not rotating, do not use brute force. Try to warm it with a hair dryer (carefully, without overheating PVC) or drip a little alcohol on the thread to soak the dirt. In extreme cases, if the valve is not screwed, but glued, it will have to be carefully cut with a scalpel, trying not to damage the fabric of the cylinder.
Once you have a new valve installed, let the glue dry completely, which usually takes 12 to 24 hours, and then you can pump the boat to the working pressure and do a check.
Comparison of methods of troubleshooting
To make it easier for you to choose your tactics, we have prepared a summary table that will help you quickly navigate depending on the symptoms and type of valve.
| A symptom. | Probable cause | Method of decision | Complexity |
|---|---|---|---|
| A whistling of air | Sand under the petal | Purge and flushing | Low. |
| Slow pressure reduction | Wear of rubber gasket | Replacement of sealer | Medium |
| Traumatizes at the base of the valve | Detachment of the paste | Valve gluing | High. |
| The valve doesn't hold the pressure. | Breakage of a spring or rod | Whole valve replacement | High. |
As you can see from the table, in most cases, you can do with simple methods, but if the problem lies in the detachment of the valve itself from the tissue (grass at the base), then this is a question of professional repair, since it requires a quality paste.
Prevention and care of valves
To avoid the flap-missing situation, follow simple rules of operation, check the pressure in the cylinders regularly, especially before prolonged sun exposure, and excessive pressure is the main enemy of the valves, it can squeeze out the movable part or break the tightness.
After every fishing or walk, especially in shallow water or in overgrown areas, wipe the area around the valves. Sand stuck in the screw valve thread works like an abrasive and will quickly disable the mechanism. Use safety caps if provided by your boat's design.
Keep the boat dry, preferably straightened or loosely twisted. Prolonged compressed storage can cause the sealer to "remember" the shape, which will cause it to stop fitting tightly when pumped.
Regular lubrication of the moving parts of the valve with silicone 1-2 times a season prolongs the service life of the seals by 2-3 times and prevents the mechanism from sticking.
Following these simple guidelines will allow your boat to last for years without major breakdowns. Remember that timely maintenance is cheaper and easier than emergency repairs on shore.
Can I use a car sealant to repair the valve?
Car sealants often contain acids or solvents that break down PVC and rubber seals. Use only specialized adhesives and lubricants for inflatables.
Why does the valve soak in the sun when everything was normal at home?
When heated, the air inside the cylinder expands, creating excess pressure, if the valve is contaminated or worn out, it can't withstand the increased pressure, and it can also expand the plastic thermally, which temporarily disrupts the seal geometry.
How long does the glue dry when replacing the valve?
The polymerization time depends on the brand of the glue and the air temperature. Usually, the initial grip takes 30-60 minutes, but the glue gains full strength after 24 hours. Don't load the boat early.
Can you replace the Bravo valve with a screw valve?
Theoretically, if the diameters match, but it will require re-adjustment, but it is better to put the type that is provided by the design of the boat, so as not to upset the balance of rigidity and tightness of the cylinder.