The Hummel CF821 is a genuine safety cartridge designed for use in Hummel pressure relief valves, which are integral components of pressure compensation elements. Made from durable polyamide (PA), this cartridge ensures reliable pressure equalization and protection against overpressure in various industrial machinery and applications. It is engineered for an operating temperature range of -40 °C to +100 °C and provides a pressure relief of approximately 0.2 bar with a flow rate of about 100 L/h. The cartridge contributes to maintaining the integrity and performance of industrial systems.