Festo H-1/2-B Non-Return Valve G1/2 5500L/min 12bar 11691

Overview
The Festo H-1/2-B (part number 11691) is a high‑performance, in‑line check valve from the H series, engineered to ensure reliable, one‑way flow of compressed air in pneumatic systems. This non‑return valve prevents the reverse flow of air, making it a critical component for maintaining system pressure, protecting sensitive equipment, and sequencing operations in industrial automation applications.

Featuring robust G1/2 threaded ports, the valve is suitable for integration into a wide range of medium‑sized pneumatic networks. Its screw‑in design allows for straightforward in‑line installation. The valve delivers an exceptional standard nominal flow rate of 5,500 l/min, ensuring minimal pressure drop and high system efficiency. It operates reliably across a broad pressure range of 0.4 to 12 bar and a temperature range of -10°C to +60°C, making it ideal for diverse industrial environments.

Constructed with an anodized wrought aluminum alloy housing and NBR seals, the H-1/2-B offers excellent durability and corrosion resistance (CRC 2 – moderate corrosion stress). It is RoHS compliant, copper‑ and PTFE‑free, and can be operated with or without lubrication. This check valve is widely used in factory automation, packaging machinery, and material handling systems to prevent backflow, maintain pressure, and ensure safe, reliable operation.

Key Features

• Non‑Return (Check) Valve Function – Allows airflow in one direction and blocks it in the opposite direction, preventing backflow and maintaining system pressure.

• High Flow Capacity – Delivers an exceptional standard nominal flow rate of 5,500 l/min, minimizing pressure drop and maximizing system efficiency.

• G1/2 Threaded Ports – Features G1/2 female threaded connections on both ports for straightforward in‑line installation into medium‑sized pneumatic systems.

• Wide Operating Pressure Range – Operates reliably from 0.4 bar to 12 bar, suitable for both low‑pressure and high‑pressure pneumatic circuits.

• Broad Temperature Range – Rated for ambient and media temperatures from -10°C to +60°C, ensuring reliable performance in diverse industrial environments.

• Durable Anodized Aluminum Construction – Anodized wrought aluminum alloy housing with NBR seals provides excellent durability and corrosion resistance (CRC 2 – moderate corrosion stress) for long service life.

• Flexible Installation – Screw‑in mounting allows the valve to be placed in any position, simplifying integration into complex pneumatic layouts.

• RoHS Compliant & Environmentally Safe – Free of copper and PTFE, and meets RoHS environmental standards.

• Original Brand New, Within Warranty Period – Genuine Festo product, brand new in sealed packaging, covered by manufacturer's warranty.

• 100% Satisfaction Guarantee – Your purchase is protected by our satisfaction guarantee; return or exchange if not completely satisfied.

Technical Specifications

Applications
Ideal for preventing backflow and ensuring one‑way flow of compressed air in a wide range of industrial automation systems, including factory automation lines, packaging machinery, material handling equipment, pneumatic control circuits, and general industrial machinery. Suitable for use in applications requiring reliable directional flow control.

Package Includes

• 1 x Festo H-1/2-B Non‑Return Valve (11691)