How Torque Affects Sealing Performance in Hydraulic Systems

Torque plays a critical role in whether a hydraulic connection seals correctly or leaks under pressure. Under-torquing a fitting leaves the sealing surfaces loose, which allows pressurized fluid to escape through small gaps that should have been compressed. Over-torquing creates the opposite problem, where excessive force distorts the threads, crushes sealing surfaces, or damages the flare or O-ring. In both cases, the system becomes more prone to leaks and premature failure. Proper torque ensures that each sealing surface seats exactly as intended.

Each thread type reacts differently to torque. NPT and MPT threads rely on taper engagement, meaning the threads must wedge together tightly enough to create a seal. Too little torque results in seepage, while too much torque can crack female ports or deform the male taper. JIC fittings depend on the precision of the 37-degree flare. Too little torque keeps the flare from fully seating. Too much torque crushes the flare and leads to metal fatigue. ORB and BSPP fittings rely on O-ring or washer compression, where correct torque gently compresses the elastomer without cutting or flattening it. The right torque protects the O-ring and ensures long-term leak resistance.

The most reliable way to avoid leaks is to pair proper torque with high-quality fittings. Titan Fittings offers stainless NPT fittings, JIC flare fittings, ORB O-ring adapters, and BSPP adapters engineered for precision and durability. Explore fittings: https://www.titanfittings.com/... A properly torqued, properly sealed Titan fitting ensures reliable performance and a leak-free hydraulic system.