Valve for a inflatable boat of the old model: repair, replacement and choice

Old-style inflatable boats, produced in Soviet times or in the 90s, are still popular with fishermen and hunters, their main advantage is strength and maintainability, but over time even the most reliable elements, such as the most reliable ones, are still used by fishermen and hunters. flap-barIf your boat loses pressure, hisses when pumped, or doesn't hold air at all, the problem is probably the valve.

Unlike modern PVC boats with unified valves of the type Boston or LeafieldThe old rubber models were equipped with unique mechanisms that are difficult to find on sale today, but this does not mean that the boat should be written off: the valve can be repaired, replaced with a similar one or adapted to modern standards. In this article, we will examine all the nuances from fault diagnosis to step-by-step replacement, and also tell you where to find spare parts for rare models.

Types of valves on old-style inflatable boats

Old inflatable boats were equipped with several types of valves, each of which had its own design features.

• 🔧 Fungal valve The most common option on boats Ufimka., "Diver." and "Okay."It has a rubber or plastic fungus that is pressed by a spring, and the main disadvantage is that over time, the rubber tans and stops sealing.
• 🔄 The spool valve It was used in some models Volga. and "Kazanka"It looks like a car nipple, but with a reinforced spring, often broken by corrosion of metal parts.
• 🛠️ A valve with a threaded plug - met on military-style boats (for example, RL-340The sealing was ensured by a rubber gasket and a metal plug that was twisted along the thread.
• 🔩 Combination valves Rare variants that combine elements of fungus and spool, which were put on experimental or export models.

You can tell the type of valve by the way it looks and the way it opens. fungal-valve It usually has a round rubber cap that you have to pull up to let out air, and it requires you to press the central pin (like in a bicycle chamber), and if you have a non-standard valve on the boat, you should show it in thematic communities, they will give you an exact model.

⚠️ Attention: On some boats older than 1985, the valves may have been made of vulcanized rubberAttempt to remove such a valve without heating can tear the boat fabric!

Diagnosis of malfunctions: how to know if the valve is faulty

Before you start repairing, you need to determine that the problem is in the valve, not the puncture of the cylinder or the crack of the seam.

• 💨 Boat. squirmBut the air is not coming out of the puncture, but from under the valve.
• 🔍 You can see it on the valve. rubber-crack Or traces of corrosion on metal parts.
• 🛑 Valve not fixed in the closed position (The fungus does not press, the cork does not twist).
• 💧 After pumping on the valve appear bubbly (Considered by soapy water application).

For accurate diagnosis, follow the following steps:

1. Pump the boat to working pressure (usually) 200–250 mbar for old models.
2. Apply the soap solution to the valve and the area around it, and the appearance of bubbles will indicate a leak.
3. Try opening and closing the valve several times, and if the fungus or plug doesn't return to its original position, the mechanism is worn out.
4. Examine the inside of the valve (if possible) for the object rubber-break or blockage.

If the valve "traffic" air, but looks whole, the problem may lie in the air. gasket (for threaded models) or spring In this case, it is enough to replace only the worn part, not the entire valve.

Repair of the valve DIY: step-by-step instructions

In most cases, the valve of an old inflatable boat can be repaired without being completely replaced.

Fungal valve repair

If the rubber fungus has lost elasticity or a spring has broken, act as follows:

Suitable rubber (can be cut from the old chamber)

Gas glue for rubber (e.g., 88-HT or UR-600)

Flat screwdriver or tweezers

New spring (diameter is selected by the old one)

Sandpaper (grain content 100-120)

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Step 1. Carefully put a screwdriver on the fungus and remove it from the base. If the rubber is boiling, you can slightly heat the hairdryer (temperature not higher). 60°CSo as not to damage the boat's fabric.

Step 2. Clean the base of the valve and the inside of the fungus of old glue and dirt, and clear the surfaces with sandpaper for better grip.

Step 3. If the fungus cracks, cut the new one from the rubber thickness 3-4 mm (you can use an old car camera) Stick it to the base using rubber glue and install a spring.

Step 4. Check the leaks: pump the boat and apply the soap solution, if there are no bubbles, the repairs are successful.

⚠️ Attention: Do not use for gluing superglue or Moment. They break rubber, only specialized adhesives for boat materials.

2. Replacement of the spring in the spool valve

If the valve does not hold air due to a weakened spring:

Step 1. Disassemble the valve by twisting the top (usually it unscrews counterclockwise). Remove the old spring.

Step 2. Pick a new spring by diameter and length, and a spring from a ballpoint pen or car valve (e.g., a camera) will fit. CAMBAMA).

Step 3. Set the spring and assemble the valve. Test the leaks with soap solution.

Rehabilitation of the threaded valve

If the pad under the plug has worn:

Step 1. Unscrew the cork and inspect the rubber ring. If it hardens or breaks, replace it with a new one (you can cut out of sheet rubber thickness). 2 mm).

Step 2. Grease the thread silicone (Not oil!) to make the cork swirl smoother.

Step 3. Tighten the cork with effort, but do not twist - you can break the thread.

Replacement of the valve with a new one: the choice of analogue and installation

If the valve is not repairable, it needs to be replaced, and the main problem is that the original valves for old boats have not been manufactured for a long time, so you have to choose analogues or adapt modern models.

Type of old valve	Modern analogue	What will be required for adaptation	Complexity of installation
Fungal (Ufamka, Dive)	Valve Boston (small)	Cutting holes under a new diameter, pasting	Medium
Zoltnik (Volga)	Cycling nipple Presta or Schrader	Installation through the adapter, sealing with epoxy	High.
The threaded plug (RL-340)	Valve Leafield C7	Slicing a new thread or installation on glue	Low.

To replace the valve with an analog, follow the following steps:

1. Remove the old valve by carefully cutting it with a knife along the contour.
2. Pick up a new valve by the diameter of the hole. If it's smaller, widen the hole, if larger, use a transition coupling.
3. Apply PVC/rubber glue to the base of the new valve (e.g. Polyurethane glue Bostik) and press against the boat. Stick it with a scab for 12 to 24 hours.
4. After drying the glue, check the tightness with a soap solution.

⚠️ Attention: When installing the valve Boston hop-boat You can not use a solvent-based glue (for example, 88th) - it will eat the fabric! Only polyurethane or two-component adhesives.

Where to buy valves and spare parts for old boats

Finding the original valves for boats over 20 years old is not an easy task, but there are proven ways:

• 🛒 Specialty shops:
  • Lodmaster (Moscow) - There are rare spare parts for Soviet boats.
  • Fleet Master. (St. Petersburg) - sell remap kits for valves of the "fungal" type.
  • BazaarBoat (online) - the market of used parts.
• 🔧 Markets and flea markets: Often on the radio market points or in garage cooperatives you can find old valve reserves, especially pay attention to the cities with a developed boat culture (Astrakhan, Volgograd, Nizhny Novgorod).
• 🌍 Overseas sites: Nana eBay or AliExpress Sometimes come across valves of the Soviet sample (see for the type of requests). "old Russian boat valve" or "Ufamka valve.").
• 🤝 Thematic forums: Nana FishHuntForum or LodkaOnline Often sell used parts or share contacts of masters who make valves to order.

If the original valve could not be found, consider making a duplicate to order. "Resintechnics." in Moscow Polymer. in Yekaterinburg) can cast rubber fungus or carve metal parts on your sample.

How to distinguish a fake from the original valve?

The original Soviet valves were marked (for example, the "GOST 12345-78" There's no such designation on fakes, and also look at the quality of the rubber: the originals have thick, pore-free, crack-free rubber, and the fakes have loose, chemical-smelling rubber.

Prevention: how to prolong the life of the valve

To make the valve last longer, follow these recommendations:

• 🧴 Lubricate the rubber parts silicone lubrication (1-2 times a season) will prevent drying and cracking.
• 🚫 Don't pump the boat over. Excessive pressure (more than that) 250mb) deforms the valve.
• ☀️ Keep the boat in the shade. Direct sunlight destroys rubber. Perfect storage temperature. +5..+20°C.
• 🧹 Wash the valve with fresh water after use in salt water (if the boat is sea-going).
• ❄️ Don’t leave the boat inflated in the cold. The rubber becomes brittle and may crack.

It is also useful to disassemble the valve once a year, clean it of dirt and check the spring. If you notice the first signs of wear (rubber has become hard, the valve is tightly open), immediately replace the gasket or lubricate the mechanism.

Frequent Repair Mistakes and How to Avoid Them

Many older boat owners make the same mistakes that lead to repeated breakages or tissue damage.

• 🔥 Use of inappropriate glue - for example, Superglue. or PVAThey're not leakproof and they break down rubber. 88-HT, UR-600 or Bostik 2402.
• 🔪 Rough valve cutting It causes tears in the fabric, always putting a board under the boat and cutting with a sharp blade.
• 💪 Tug-tug of threaded stoppers - the threads are broken, making the valve unrepairable. 1-1.5 Nm.
• 🌡️ Open-fire valve heating The rubber melts, the fabric of the boat can catch fire, maximum - a dryer at minimum power.
• 🚫 Ignoring small leaksIf the valve is putting a little air in, it quickly becomes a serious problem. Repair at the first sign.

Another common mistake is trying to install a modern valve. Boston The diameter of Soviet valves often differs from the standard 25 mm or 38 mmSo without fitting, the new valve will leak.

FAQ: Answers to Frequent Questions

Can I install a PVC boat valve on an old inflatable boat?

Yeah, but with reservations, like valves. Boston or Leafield They're functionally suited, but they may not match the hole diameter.

1. Carefully expand the hole in the boat to the desired size.
2. Use a transition coupling (can be cut from thick rubber).
3. Smear all joints with glue for PVC / rubber.

Important: Not all adhesives are compatible with rubber and PVC. tangit It is not suitable – it is only for PVC.

Which glue is best used for valve repair?

For inflatable boats suitable:

• 88-HT It is universal, but it dries for a long time (24 hours).
• UR-600 - durable, withstanding vibrations.
• Bostik 2402 Polyurethane, suitable for bonding rubber with metal.
• Crystal moment - only for minor repairs (not for sealing!).

Before gluing, be sure to degrease the surface acetone or white-spirit.

What to do if the valve is "stiff" and not removed?

If the fungus or cork does not break away from the base, try:

1. Apply around the valve WD-40 or silicone lubricant And wait 10 to 15 minutes.
2. Carefully heat the base with a hairdryer (temperature not higher) 60°C).
3. Push the valve with a flat screwdriver, putting a thin plate under the blade so as not to punctur the boat.
4. If the rubber still does not go away, cut the fungus with a knife, and the base of the valve drill or cut.

Do not use a hammer or pliers – it will damage the fabric of the boat!

How much does it cost to replace a valve in a workshop?

The cost depends on the type of boat and the complexity of the work:

Type of work	Price (rupe)
Fungal valve replacement	1 200–2 500
Repair of the spool valve	800–1 500
Installation of a modern valve (Boston/Leafield)	2 000–3 500
Manufacture of the valve to order	1 500–4 000

The price usually includes work and material, and if you provide your valve, the price may be lower.

Can I ride a boat with a faulty valve?

It is not recommended to do so.:

• Loss of controllability on the water (the boat becomes soft).
• The risk of sudden deflation of the balloon when hitting a wave.
• Damage to tissue due to uneven distribution of load.

If the valve starts poisoning the air, blow the boat off and start repairing it.