Hydraulic ISO A couplings are a widely used standard in hydraulic systems. These couplings are designed to provide reliable and leak-free connections in a variety of hydraulic applications. Here are some key features and details about ISO A couplings. ISO A couplings are designed according to the ISO 7241-1 Series A standard, ensuring interchangeability with other couplings that adhere to the same standard, regardless of the manufacturer. Typically, these couplings feature a poppet valve mechanism which helps prevent fluid loss when disconnected and provides a secure seal when connected.