Valve for the boat Ufimka 22: selection, replacement and repair

Operation of inflatable boats of Soviet and Russian production, such as the legendary Ufim 22It requires the owner to pay constant attention to the leakproofness of the hull. It is the air valves that are one of the most vulnerable elements of the structure, as they are subjected to regular mechanical stress during pumping and descent of the boat. Many owners face a situation where the boat begins to poison the air, and the root cause is often worn or damaged valve mechanism.

In this article, we will discuss in detail the device of a standard valve used on boats. Ufimka and KazankaWe'll look at how to replace it at home and pick up modern analogues, and understanding the principles of this system will allow you to avoid expensive repairs in the workshop and restore the sealability of the vessel before the season.

It's worth noting that timely diagnosis of the valve group can extend the life of the entire boat by several years, and ignoring minor air intoxication can lead to the fact that you are left on the water with half-sleeping sides, which is not safe, so the maintenance of this part should be given special attention.

The device and principle of operation of the valve system Ufimki

Designally valve for the boat Ufim 22 It's a fairly simple but efficient one-way air-flow device, and it's based on a body that sticks into PVC fabric, and a movable spool that locks the exit hole under pressure, and it uses a petal or plate-like type of locking that's reliable when maintained properly.

The key element is return-valveIt's a system that keeps the air out when the internal pressure in the cylinder increases. When pumped, the airflow overcomes the resistance of the spring or the elastic element, opening the passageway. Once the pump pressure drops, the mechanism instantly closes, fixing the volume inside.

It is important to distinguish between two main types of connections that may have occurred in different years of release: a threaded connection under the pump and a simple cone. Ufamki The most common threaded adapter is a standard one that is compatible with many Soviet and Russian foot pumps, but over time the threads may wear out or become contaminated, requiring regular cleaning.

⚠️ Warning: Never attempt to pump a boat with a high pressure compressor without a gearbox and pressure gauge. A sharp increase in pressure can squeeze the valve out of the socket or damage its internal structure, leading to instantaneous depressurization of the balloon.

The materials used in the manufacture of original valves usually include brass or strong alloys with rubber seals. Rubber tans over time, especially if the boat is stored in inappropriate conditions, losing elasticity and not fitting tightly to the valve seat. It is the loss of seal seal sealing is the most common cause of leaks.

Diagnosis of malfunctions: how to find a leak

Before you start replacing or repairing, you need to precisely localize the problem. Often owners sin on the valve, although the leak may be in the seams or punctures of the side, accurate diagnosis will require soap solution and careful examination.

Pump the boat to work, but don't overdo it. Prepare the solution with water and plenty of detergent or liquid soap. Carefully apply the foam to the area around the valve, including the place of pasting into the fabric and the head itself.

If you see bubbles coming up, it means there's a leak, and it's important to determine where it is.

• 🧼 Bubbles come from under the thread or center of the valve - the problem is in the mechanism itself or the seal.
• 💨 Bubbles appear along the contour of the valve pasting into the fabric - the tightness of the glue seam is broken, re-adhesion is required.
• 🌬️ Air only comes out when pressed on the valve - possibly contamination or damage to the shut-off element.

In some cases, the leak can be microscopic and only noticeable at a significant temperature difference. If the boat is pumped in a warm room and then carried out to the cold, the pressure inside will drop naturally, and this is not a malfunction. However, if the pressure drops rapidly even in stable conditions, repair is necessary.

Valve replacement tools and materials

To carry out a high-quality valve replacement on the boat Ufim 22 You need to prepare a set of tools, and you don't have to rely on the tools at hand, because careless work can cause damage to PVC tissue, which will cost more to repair than a new valve.

First of all, you'll need a special key to unscrew old valves, often a metal plate with two pins that comes with the pump, but if it's lost, you can make it yourself from thick wire or buy it from a store.

It is also necessary to prepare:

• 🔧 Special key for dismantling and installation of valves (suitable for standard PVC boats).
• 🧴 Degreasing agent (acetone, alcohol or special PVC cleaner) for surface preparation.
• 🧽 Abrasive skin (grain content 200-400) for cleaning the place of pasting.
• 🌡️ Hair dryer for heating fabric and glue (optional, but desirable).
• 🧱 Load for pressing (sandbags or heavy books).

Pay special attention to the choice of glue. For PVC boats, two-component polyurethane glue is used. A conventional "moment" or superglue will not work, because it will not provide the necessary elasticity and water resistance of the seam. The glue should be for PVC materials.

Step-by-step instructions for valve replacement

The replacement process requires precision and adherence to technology. If you are first encountering PVC repairs, it is recommended to practice on cloth clippings if they are left from the boat, or act extremely carefully.

The first step is always to dismantle the old element: insert the key inside the boat (if the design allows) or outside, grab the back part and unscrew the valve counterclockwise. If the valve is "sticky," don't use excessive force, it's better to drip some solvent on the thread and wait.

Next, we have to prepare the surface on which 90% of success depends:

1. Carefully clean the area around the hole with a skin, removing the old glue and oxidized layer of PVC.
2. Degrease the surface with solvent, removing all dust and fat.
3. Apply the first thin layer of glue to the fabric and on the mounting pad of the new valve.
4. Let the first layer dry to "lip" (usually 10-15 minutes, read the instructions for the glue).
5. Apply the second layer and also let dry.
6. Strongly press the valve to the fabric and twist it with a key, ensuring tight contact.

Once installed, you must leave the boat alone for at least 24 hours to fully polymerize the adhesive, and you cannot load the adhesives in the first hours, and only after drying completely can you test the adhesives.

Table of valve compatibility and specifications

When buying a new part, it is important not to go wrong with the size. Ufimka and analogues (Kazanka, timen) standard dimensions are used, but there are exceptions depending on the year of issue.

Below is a table of the main specifications that will help you choose the right part in the store or in the market.

Parameter	Meaning / Description	Note
Valve type	Petal/Reverse	Standard for PVC boats of the USSR and Russia
Base diameter	About 35-40 mm	Depends on the manufacturer, you need to measure
Case material	Brass/ABS plastic	Brass is longer lasting, plastic is lighter
Working pressure	Up to 0.3 - 0.4 Bar	Do not exceed the tearing pressure of the tissue
Compatibility	Ufimka, Kazanka, Taimene	Often interchangeable

If you're not sure about the diameter, the best solution is to unscrew the old valve and bring it to the store as a sample, and visually comparing the carving and the seat will eliminate the error.

Where to buy original parts?

The original valves for Ufimka are difficult to find now, as production can be stopped or changed, from fishing equipment stores specializing in Soviet technology to universal valves for PVC boats that fit in diameter, and many Chinese factories under brands like Intex or Bestway, but may require fitting a seat.

Typical errors in maintenance and operation

Many valve problems are not caused by defects, but by mishandling. The most common mistake is trying to insert the pump with force without aligning the thread, which leads to a broken thread on the valve, after which it stops holding pressure or fixing the pump tightly.

The second mistake is to keep the boat deflated under heavy objects, where the valve is glued, the tissue is strained, and if you put a gearbox on that area, the valve can move away from the fabric or deform, causing the leakage to break.

Also worth mentioning is pollution: sand caught between the valve saddle and the shut-off element will keep it from closing tightly, blow the valve regularly or rinse it with clean water, especially after fishing on sandy shores.

⚠️ Warning: Do not use petroleum-based lubricants (vaseline, solidol) to lubricate the rubbing parts of the valve. They destroy the structure of the rubber seals and the PVC itself. Use only silicone lubricants compatible with rubber.

Another important thing is temperature: Don't leave a pumped boat in the direct sun. When heated, the air inside expands, and the pressure can exceed the critical value, which will lead to the valve being squeezed out or the seams breaking. Always blow some air if the boat is in the heat.

Frequently Asked Questions (FAQ)

Can I replace the Ufimka valve with the Intex valve?

Direct replacements without modifications are usually impossible. Intex And you often use a different thread standard and a different landing hole diameter, and you have to cut a hole in the fabric to install a valve, and you have to stick a new valve from scratch onto the glue, which requires skill and precision, and it's easier to find a universal valve that fits the size.

What is the best way to clean the valve from oxides?

You can use a soft metal brush or small sandpaper to clean metal parts (brass), plastic elements and rubber seals are cleaned only with soft cloth dipped in soapy solution or alcohol, and aggressive chemistry can eat up plastic.

What is the maximum pressure to pump into Ufamka 22?

The optimum working pressure for boats of this type is 0.2 - 0.25 Bar. Pumping above 0.3 Bar can lead to overstretching of the fabric and strain of the seams, especially in hot weather.

Why does the valve poison the air only in the cold?

The rubber seal at low temperatures loses elasticity and blows, no longer fitting tightly to the saddle, also compresses the air inside, and if there is a microslit, it can go through the suction or air output. Warming the boat often solves the problem temporarily, but the seal is better to replace.