Emiltec offers a comprehensive range of unloader valves (also known as by-pass valves) specifically designed for high-pressure water systems in the max 41 l/min and 280 bar category. These essential components ensure safe and efficient operation of professional cleaning equipment by regulating system pressure and protecting pumps from overload.
Unloader valves allow for precise adjustment of the working pressure in high-pressure water systems. When the delivery line is closed, water is diverted to the bypass, allowing the pump to operate at low pressure rather than under load. This fundamental mechanism protects system components from excessive stress and extends equipment lifespan in professional applications where frequent opening and closing of the delivery line occurs.
The unloader valves in this category feature robust construction with brass or stainless steel bodies, ensuring resistance to high pressures and corrosion. These valves operate based on the principle of a proportional valve directly actuated by a spring, providing continuous adjustability for optimal pressure control. The forged brass construction offers proven durability in demanding industrial environments.
Our selection of by-pass valves in the max 41 l/min and 280 bar range is engineered for professional high-pressure washers and cleaning systems. These valves handle flow rates up to 25-41 l/min with maximum working pressures reaching 210-280 bar, making them ideal for professional cleaning equipment used in car wash applications, industrial cleaning, and maintenance operations.
Emiltec's catalog features unloader valves from industry-leading manufacturers including Hawk, PA, Tecomec, Interpump, and Mtm. Each valve undergoes rigorous quality control and is selected for reliability, calibration accuracy, and ease of installation. Some models feature integrated banjo connections for direct mounting on pump manifolds, while others offer specialized high-temperature variants for applications requiring operation up to 85°C continuously.
Unloader valves should always be used in conjunction with safety or relief valves, which are typically calibrated at pressures 10-20% higher than the working pressure. This dual-protection approach ensures comprehensive system safety and prevents overpressure situations. The valves are essential for systems where usage conditions involve frequent delivery line closures with prolonged periods in bypass mode.
As an ISO 9001:2015 and ISO 14001:2015 certified company based in Reggio Emilia, Emiltec provides specialized technical support to help customers select the most suitable unloader valve for their specific requirements. Whether you need a replacement component or are configuring a new high-pressure washing system, our experienced sales staff offers expert advice on valve selection, calibration, and proper integration with plunger pumps and system components.