Hydraulic Connectors
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Choosing connectors in high pressure hydraulic circuits is important for preventing leaks.
- This was made clear in a recent in-person interview with a professional in the hydraulics industry. The claim was that in circuits with more than 200 PSI, connectors with "Parallel Threads" should be used instead of those with "Tapered" or "Pipe" threads.
- The key issue is that tapered threads do not seal completely and must employ a "sealant" to seal the threads completely. When fluid pressure is applied, the metal threads remain in place, but the sealant can give way and allow leaks to form. Leaks may not occur at first, but they will develop over time as the sealant weakens and as the connections experience movement and vibration.
- The designation for tapered pipe threads is "NPT", or "National Pipe Taper".
- Several types of