NPSF
NPSF (National Pipe Straight Fuel) is a parallel (straight) pipe thread designed for dry-seal applications, commonly used in fuel and hydraulic systems where leak-free connections are required without the use of additional sealing compounds. Unlike NPSM, which requires a gasket or O-ring, NPSF relies on precision fitting into an internally tapered seat to create a seal.
Characteristics:
- Thread Type: Straight (parallel)
- Thread Angle: 60°
- Sealing Method: Seals through a precision fit with an internally tapered seat (dry-seal)
- Applications: Fuel systems, hydraulic systems, high-pressure fittings
- Advantages:
- No need for thread sealant, PTFE tape, or gaskets
- Provides a secure, leak-proof connection in fuel and hydraulic applications
- Compatible with NPTF internal threads for a tight fit
NPSF threads are widely used in fuel and hydraulic applications where leak prevention is critical and a dry-seal system is preferred over traditional sealing compounds.
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