Hejian Honglun Hydraulic Parts Co., Ltd. was established in 2010. Drawing on more than 15 years of dedicated experience in designing and manufacturing high-performance Hydraulic Quick Couplings, we provide rugged, field-tested solutions worldwide. We don’t only manufacture parts - we develop reliable connections for construction, energy, transportation and many other critical industries around the world.

Our FB series stands out as premium Flat Face Threaded Hydraulic Couplings that combine reliable threaded locking with clean, low‑leakage operation. The body is made from corrosion‑resistant brass, paired with a zinc‑plated carbon steel wing nut built for heavy use. This makes our product true Heavy Duty Wing Nut Couplings that can stand up to frequent tightening, field use, and even occasional impact without breaking.

A key advantage is the ability to connect and disconnect while under full system pressure. That’s why these are trusted Under Pressure Connect Couplings ideal for applications where shutting down the system isn’t practical. The threaded design ensures a tight, secure lock every time, while the flat face valves deliver Low Spillage Hydraulic Quick Couplings performance, keeping fluid loss to a minimum and preventing contamination.

These couplings are purpose‑built for demanding mobile and industrial setups. They are widely used as Wet Line Kits Hydraulic Couplings and Dump Trailer Hydraulic Couplings, supporting smooth operation in dump trucks, trailers, and hydraulic transport systems. They also perform reliably in submersible pumps, engine test stands, and various oil and gas field equipment where durability and sealing matter most.

The sturdy flange design allows stable, no‑slip bulkhead mounting to reduce downtime and simplify installation. We include matching brass caps and plugs for extra protection when not connected, extending service life in dusty or harsh field conditions. Standard NBR seals ensure stable performance from ‑25°C to 125°C, with FKM and EPDM available upon request for specialized fluids.

As a professional hydraulic parts factory, we control every production step to ensure consistent quality, dependable interchangeability, and long service life. Our FB threaded couplings are designed for users who need strong, safe, and maintenance‑friendly connections they can count on shift after shift.

If you work with dump trailers, wet line kits, oil‑gas equipment, or high‑pressure hydraulic systems, our FB Threaded Hydraulic Quick Couplings are ready to improve your reliability and efficiency.

Media Contact
Company Name: Hejian Honglun Hydraulic Parts Co., Ltd.
Email: Send Email
Country: China
Website: https://www.hlfluid.com/