Carmo 03‑374 HF‑Weldable Pressure Relief Valve – G 3/4" Modular System Valve for Inflatables (ABS)

The Carmo 03‑374 Pressure Relief Valve is a robust, low‑profile ABS valve designed for safe, reliable pressure management in inflatable and technical textile applications. Engineered to open automatically at a predetermined pressure, this valve helps protect inflatable structures from over‑inflation or pressure spikes—making it ideal for buoys, rafts, maritime equipment, ballast systems and other flexible structures exposed to changing temperatures and environmental conditions.

Part of Carmo’s modular valve system, the 03‑374 valve is designed to mount into the standard 03‑601 HF/ultrasonic weldable threaded flange, enabling seamless integration with complementary valves such as inflation and vacuum valves. The system uses a G 3/4" threaded socket, ensuring secure attachment and compatibility with a wide range of Carmo components.

Manufactured in Denmark using high‑precision injection moulding, this valve delivers excellent dimensional accuracy, long‑term durability, and consistent performance. Carmo places a high priority on sustainability and responsible production, ensuring components are made using quality materials while minimising environmental impact.

The 03‑374 valve is designed for HF welding when used with Carmo’s weldable flange, enabling secure bonding to PVC and PUR‑based materials, and ensuring reliability across demanding industrial, marine and environmental applications. 

Whether you're working with inflatables, buoyancy products or flexible tank systems, this pressure relief valve provides a trusted, industry‑standard solution that ensures safety, stability and long‑term product performance.

This listing is for small‑order requirements, allowing you to purchase individual units or low volumes without having to commit to a full box. 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.

For customers who require bulk volumes, a full box of 500 pieces is available on a separate product page HERE, dedicated to wholesale ordering and offering great value for money. These boxes are added to our consolidated monthly order that ships from Carmo on the 4th Wednesday of each month.