Valves

The Valve on your RIB / Inflatable can be repaired or replaced using parts and components of the same type, or if preferred a complete replacement with a better more suitable valve could be used.

A good quality ‘Valve Doubler‘ can ensure a successful and robust fit into your dinghy. The Doubler simply reinforces the fabric around the Valve. A ‘professional adhesive’ is essential for both Hypalon or PVC inflatable boat fabrics. Polymarine branded products are specifically designed for such a task.

A10 Valves

• High flow rate.
• ISO 15738 approved for SOLAS liferafts.
• 100% tested for opening and closing pressures during production.
• Rugged, design to ensure long life.
• Low, smooth internal profile to protect fabric when deflated.
• Plug option available.
• Rapid installation with clamp fitting – no welding or adhesive required.
• Low profile option available.

A3 Pressure Relief Valve

• Sensitive valve with rapid opening.
• High flow rate.
• ISO 15738 approved for SOLAS liferafts.
• 100% tested for opening and reseat pressures during production.
• Rugged, design to ensure long life.
• Smooth profile to protect fabric when deflated.
• Plug available.
• Bonds into fabric

The A3 was first produced in 1965 as a Pressure Relief Valve for SOLAS type liferafts. The new B10 valve is now the favoured valve for this application.

However, due to the high sensitivity of the A3 Valve it is still ideal for close control of pressures in large structures. This is due to the opening and closing pressures on the valve being very close together.

The A3 Valve is available in a version that allows topping-up through the valve – please ask for the A3 SRTU type Valve.

The bonded flange is available in natural rubber for low temperature from –40ºC to +80ºC or in Neoprene for –20ºC to +80ºC.

A wide range of pressure settings is available – please see Pressure Selection Chart.

A4 Inflation / Deflation Valve (Topping Up)

• Moulded rubber construction avoids damage to fabric from impact or abrasion.
• Bonds into the fabric.
• Plug provides a secondary seal.
• Rugged – Requires no routine maintenance.
• Deflation probe available.
• Allows a flow of 4.7 litres per second at 0.25psi applied air pressure.

Our most commonly used topping up valve is the A8 Valve. However, where the risk of damage to the fabric of the structure due to vibration or impact is high, the A4 Valve can provide the solution. The A4 Valve is also available with a Deflation probe.

The natural rubber version has a temperature range of –40ºC to +80 ºC. The neoprene version has a temperature range of –20ºC to +80 ºC

A5 Inflation / Deflation Valve

• Very high deflation rate through 35mm diameter orifice
• Moulded rubber construction avoids damage to fabric from impact or abrasion
• Bonds into the fabric
• Plug provides a protective cover and secondary seal
• Rugged – Requires no routine maintenance
• Temperature range of –20ºC to +80 ºC

The A5 Valve has a non-return function for inflation. For rapid deflation the core unscrewed and removed to leave a clear 35mm diameter orifice.

A6 Pressure Relief Valve

• Very smooth low profile.
• Rugged and Reliable.
• Materials used have high UV resistance.
• Protects the structure from over inflation and excess pressure build up due to solar heat.
• 100% tested for opening and closing pressures.
• High flow for size.
• Approved to ISO 9650 and ISO 15738 as a transfer valve.
• Rapid installation with clamp fitting – no welding or adhesive required.
• –40ºC to +80 ºC operating temperature.
• Easy removal if necessary for cleaning.

This compact, rugged and reliable Pressure Relief Valve has become a firm favourite with many manufacturers of leisure liferafts, RIBs and river rafts around the world. It is ideal for any application where compactness and reliability are critical. The opening and closing pressures are accurately pre-set and repeatable.

A filter cap is available for use in environments where contamination is possible e.g. river rafts. This prevents contamination without affecting the pressure relief function.

A range of pressure settings is available (see selection chart). The valves are marked with a batch number, date and pressure setting.

The valve is available in grey, black or white. We can provide a black or red plug where a secondary seal is required, for example in life raft applications.

It is also available as a non-return valve only with a nominal opening pressure of 0.29psi (0.02bar).

A7 Inflation / Deflation Valve

• Large cap gives excellent grip in cold conditions.
• Available with recessed mounting.
• Rugged.
• Requires no routine maintenance.
• Clamps into the fabric.
• Easy inflation due to low back pressure.

Inflation is via a bellows end fitting which is a push-fit into the valve.

To start deflation push down the white central spindle and give it a quarter turn
anti-clockwise to lock the valve open. Turning the spindle clockwise returns the diaphragm to its seat and seals the valve.

The A7 Valve is sometimes used instead of the newer B7 and C7, where completely flush fitting is required. This requires the use of the recessed mounting.

Available in black or grey.

A8 Inflation / Topping Up Valve

• Very compact size.
• Rugged construction.
• Good flow rate due to low opening pressure.
• Smooth contoured product.
• Cap acts as a protective cover and secondary seal.
• Can be clamped into a wide range of fabrics.
• Approved for SOLAS liferafts to ISO 15738.

Our most popular topping up valve and long established as the toughest valve in its class, the A8 Valve allows fast, trouble free assembly due to the simple clamp-in design.

The valve can also be used for deflation by adding a vacuum probe or special deflation probe.

Achilles Valve

Achilles Non-Corrosive Check Valve.

All Achilles valves are non-corrosive and double capped for safety. They are engineered for easy “one-way” inflation and instant deflation. Deflation probe.

B7 Valve

• Smooth, snag-free profile.
• Concealed retaining strap.
• Large cap gives excellent grip in cold conditions.
• Rugged.
• Requires no routine maintenance.
• Clamps into the fabric.
• Easy inflation due to low back pressure.

Inflation is via a bellows end fitting which is a push-fit into the valve.

To start deflation push down the white central spindle and give it a quarter turn
anti-clockwise to lock the valve open. Turning the spindle clockwise returns the diaphragm to its seat and seals the valve.

The B7 Valve is sometimes used instead of the newer C7, where operation at very low temperatures is required or where the valve needs to seal against the inside surface of the fabric.

Available in black or grey.

D7 Valve

• High flow.
• Smooth, low profile cap.
• Compact internal profile to prevent damage to fabric.
• Extremely rugged and reliable.
• The core includes an ‘O’ ring to optimize sealing on fabric.
• Core can be removed from the outside of the tube for cleaning.
• Cap acts as a secondary seal.
• 100% tested during production.
• High quality materials to ensure long life.

The Leafield Marine D7 valve is designed to replace the highly successful C7 Valve – the favoured inflatable boat valve for use in demanding applications such as Military and Commercial RIBs, River rafts and Inflatable Boats.

The new D7 Valve has several benefits over the previous model with improved inflation/deflation speed. It has an enhanced clamping method with an ‘O’ ring seal added to the valve core to reduce the risk of leaks.

ACETAL (POM) plastic parts give high strength, chemical and ozone resistance.

The seal is designed so that it cleans the seal surface as it operates; this also reduces the risk of leakage due to dirt contamination.

When the cap is fitted the rugged retaining strap is hidden from view to prevent snagging on other equipment. Simple cap replacement – it does not require the valve to be removed.

The D7 valve has a shorter internal profile than other valves making it ideal for smaller diameter tubes, for example, inflatable kayak floors.

The D7 is available in grey or black and the caps are available in grey, black, and white or yellow. Subject to a minimum quantity and tooling charge, your company logo can be added to the Valve Cap.

C7 Valve

• Smooth, low profile.
• Rugged.
• 100% leak tested during production.
• Quality materials to ensure long life.
• Smooth internal profile to protect fabric when deflated.
• Cap acts as a secondary seal.
• Core can be removed from the outside of the tube.

The C7 valve has become the preferred inflatable boat valve for use in demanding applications such as Military and Commercial RIBs, River rafts and Inflatable Boats.  Its stylish appearance has also won it many fans in the luxury RIB and tender market.

When the cap is fitted the rugged retaining strap is hidden from view to prevent snagging on other equipment.

Simple cap replacement – it does not require the valve to be removed.

The seal is designed so that it wipes the seal surface as it operates; this reduces leakage due to dirt contamination.

The valve is available in grey or black. Caps are available in grey, black, white or yellow.

Flush Valve

• Acetal flush fitting complete inflate/deflate valve.
• Mechanically fitted into hole 38mm dia.
• Reinforcing fabric doubler required depending on pressure.
• Servicing is kept to a minimum.
• Baynet fit cap.
• Push and turn core to deflate
• The Flush Fit spanner is needed to fit the valve
• Available in Black or Grey

Flush Valve / pull up / screw fit.

Flush Valve / bayonet fit.

Budget Valve

The multipurpose replacement valve

Zodiac Valve

Spare parts for Zodiac valves. There are two main valve types used by Zodiac. ‘Delrin Valve’ and the ‘Recessed Valve’. Please check on the drawings as to which valve is on your dinghy.

Pumps and Inflators