CROAC ERn 4187

CROAC Pneumatic Volume Booster Relay ERn 4187 Description This is a pneumatic volume booster, model ERn 4187, manufactured by CROAC of France, a company later acquired by Crouzet. This component is designed to take a pneumatic signal and reproduce it with a much higher flow rate, allowing for the rapid operation of large pneumatic actuators, clutches, or brakes without a significant pressure drop. Its robust aluminum construction ensures durability in industrial environments. This is an excellent replacement part for legacy systems relying on CROAC components. Specifications Manufacturer: CROAC Model: ERn 4187 Function: Pneumatic Volume Booster / Relay Body Material: Aluminum Control: Manual adjustment knob Label Info Brand: CROAC Address: 74130 BONNEVILLE – FRANCE Model: ERn 4187 Code: 106 Application Typically used in applications requiring fast response times from large volume pneumatic devices, such as large bore cylinders, pneumatic presses, and valve actuators in various manufacturing and process control industries. Country of Origin Made in France. CO2 Impact Choosing this pre-owned component over a new one prevents the emission of approximately 6 kg of CO2, which is associated with the production of new aluminum and electronic parts. This is a sustainable choice for your operations. Availability This item is a used, tested component in good working condition. Ready for immediate dispatch. Order now from profideals for expert support and fast delivery. FAQ Question?What is the primary function of a pneumatic volume booster like the ERn 4187?Its main purpose is to increase the speed of pneumatic actuators. It uses a small-volume signal from a control valve to control a high-volume air supply directly to the actuator, bypassing the flow limitations of the control valve itself. Question?Can I use this booster to increase the pressure of my signal?No, this is typically a 1:1 ratio relay. It reproduces the input signal pressure at the output but with a much higher flow capacity. It does not amplify the pressure itself. Question?What should I consider when installing this legacy CROAC component into a modern system?Ensure that the port threads are compatible with your existing fittings (they may be BSPP or NPT, common in European and American systems respectively). Also, verify that the operating pressure range of this device is suitable for your system’s requirements. profideals is not an authorized distributor, reseller, or representative of the products featured on this website. All product names, trademarks, brands, and logos used on this site are the property of their respective owners. Last Update: Friday, March 13, 2026