Why do Nexen brakes have a shorter stopping distance while they are slower to react?
It is true that compared to an electromechanical brake the air controlled units have an extra delay before the torque starts to build up, caused by the reaction time of the valve and the physical process of inflating or deflating. The reaction time however is not the only element that determines the total stopping distance. The deceleration rate is the critical element and this is determined by the available dynamic torque. The torque build-up is literally “explosive” and nexen brakes often offer more than twice the dynamic torque of it’s competitors which means the stopping distance is less than half. To improve the reaction time of an air actuated brake, make sure to use a fast valve with enough air flow, but also keep the air lines short and with a minimum of elbows. The supply pressure should be close to 6 bars. For spring applied brakes we recommend the use of a quick exhaust valve mounted on the air inlet of the brake.
