Carmo 03‑325 HF/Ultrasonic Weldable Non‑Return Inflation Valve – 5 mm Inlet | PVC / PVC‑PUR

The Carmo 03‑325 Non‑Return Inflation Valve is a high‑performance inflation fitting designed for rapid, reliable inflation of PVC and PVC/PUR inflatables. Featuring an integrated non‑return mechanism, it allows air to flow in freely while preventing unintentional backflow, ensuring smooth and controlled inflation. For deflation, pressure can be applied directly to the base of the valve to release air efficiently—making this component practical for both end‑users and manufacturers alike. 

Purpose‑built for High‑Frequency (HF) and ultrasonic welding, the 03‑325 valve has optimised material composition and geometry to achieve strong, secure and repeatable welds. This enhances reliability in long‑term use and ensures consistent performance across a wide range of inflatable applications. 

Manufactured in Denmark using Carmo’s precise injection‑moulding technology, this valve delivers excellent dimensional accuracy, durability and low unit cost. Carmo maintains a strong commitment to sustainable production, using high‑quality materials while reducing environmental impact at every stage of manufacturing.

Available in PVC and PVC/PUR variants, and supplied here from stock in the UK in variable quantities to suit your needs.

The 03‑325 valve is widely used across:

• Inflatable leisure products
• Industrial and technical textile inflatables
• Marine and buoyancy equipment
• General low‑pressure inflatable structures 

This valve can be HF‑welded using Carmo’s recommended 07‑300‑0140 electrode, ensuring secure bonding and dependable process control in both automated and manual HF welding setups. 

Whether you're manufacturing inflatables at scale or developing specialised technical textile products, the Carmo 03‑325 offers a dependable, industry‑standard solution with proven performance.

ORDERING

These valves are on the shelf here in the UK and for that reason we can offer small‑order quantities, allowing you to purchase individual units or low volumes without having to commit to a full making. A £20 picking, packing and shipping fee is automatically applied at checkout to cover the handling of these bespoke quantities. Just increase the quantity to the number of pieces you need. The more you buy, the more economical they prove to be!