← All Categories Success Story: Disconnect Couplers & Adaptors This success story demonstrates how the SI Group Manufacturing prefers OPW Engineered System for their Drylock Disconnect Couplers and Adaptors because of their outstanding safety features and virtually no fluid loss and no exposure. Industrial Hose & Fittings, Success Stories Success Story: Loading Arms In this video, SI Group Manufacturing explains why they trust OPW Engineered Systems with their loading arms, counterbalances and swivels. Loading Systems, Success Stories