Double action flange® for special applications. The double action flange is our most recent development. Its main advantage is that we van reduce the minimum pitch circle diameter by running the cord both along the bottom and the top of the flange ring. This creates more space underneath the flange ring to reduce the pitch circle diameter. This flange can be used in special situations where a short hose is needed with a high tensile strength and small pitch circle diameter. The form-fit flange construction guarantees maximum strength.