Circular self-regulating flow variator SagiCofim Technical features The VRK series circular self-regulating flow variator keeps the predefined flow constant, with a precision of +/- 5%, despite any pressure or airflow variation, without the need of external power. It works through a system of blades that - when touched by the air flow - interact with each other through an external graduated spring. The air flow is predefined, if necessary it can be adjusted before installation. The maximum pressure drop differential for a constant air flow is 1000 Pa; the minimum pressure drop value for the activation of the variator is related to the size and goes from 40 to 120 Pa. The versions VRK 233-1-i-25 and VRK-233-1-i-50 with thermo acoustically insulated double case, respectively 25mm and 50mm thick, are available. variator insulated variator insulated variator ✓ Products ready in stock Versions in anti-corrosion painted steel, in AISI steel, with electric or pneumatic motor are available. Prices upon request. Technical draft