ISO 16028 Flat Face Hydraulic Quick Couplers – FF Series Overview
What Is ISO 16028?
The ISO 16028 standard defines a class of flat face, flush-sealing hydraulic quick couplers designed for leak-free performance during connection and disconnection under pressure. These couplers are widely adopted in construction, mining, petrochemical, and transportation sectors due to their safety, cleanliness, and interchangeability across manufacturers.
Unlike traditional poppet or ball-valve couplers (like ISO 7241-A/B), ISO 16028 couplings feature a flat sealing surface that minimizes fluid loss and contamination risk—especially valuable in environmentally sensitive applications.
Key Features & Design Advantages
Carterberg’s FF Series quick couplers fully comply with ISO 16028 and offer:
• Flush face valve design to eliminate fluid loss during disconnection
• Interchangeable with major global brands such as Eaton FF, Parker FEM, Faster FF, Stucchi FIRG
• Clean-break connection – no air inclusion, no leakage
• Push-to-connect sleeve mechanism with locking sleeve (anti-vibration optional)
• Heavy-duty construction in carbon steel or 316 stainless steel
• Seal options including NBR, Viton, EPDM – compatible with a wide range of fluids
These advantages make ISO 16028 couplers ideal for use in mobile hydraulics, railway maintenance, defense vehicles, and high-pressure tool systems.
How ISO 16028 Flat Face Design Works
Unlike conventional ball-valve or poppet-type hydraulic couplings, the ISO 16028 flat face design eliminates the valve cavity that typically causes fluid spillage or air inclusion during disconnect. Both the male and female sides have a smooth, flat sealing surface that comes into contact only during full engagement.
This "flush face" interface offers a true clean-break solution — a core reason ISO 16028 couplers are widely adopted in industries with strict environmental and cleanliness requirements.
Material & Seal Options
| Material |
Use Case |
Corrosion Resistance |
| Stainless Steel 316 |
Marine, chemical, petrochemical systems |
⭐ ⭐ ⭐ ⭐ ⭐ |
| Carbon Steel |
General construction, mining |
⭐ ⭐ (with plating) |
Available seals:
NBR – for standard hydraulic oils
Viton (FKM) – for high-temp or aggressive fluids
EPDM – for water, phosphate esters
Need custom configurations? Contact us for non-standard ports or coatings.
Typical Applications
Carterberg ISO 16028 flat face couplings are widely used in:
• Construction machinery – excavators, loaders, road rollers
• Petrochemical & gas – clean disconnection under pressure
• Railway & public transportation maintenance
• Military and defense systems – zero-leak critical operations
• High-pressure tools – torque wrenches, jacks, cutters
Their zero-leak design and pressure handling up to 35 MPa (5075 PSI) make them the trusted choice for mission-critical applications.
Product Models Available
Carterberg offers six models under the FF Series. All are based on ISO 16028 structure, with variations in interface, flow size, and optional features:
| Model |
Key Feature |
Interface Type |
Typical Application |
| CB-SP-6FN |
Standard flat face coupler |
NPT |
General hydraulics |
| CB-SP-6FN-DB |
With dust caps |
BSPP |
Off-road, mining |
| CB-SP-6FN-QA |
Quick action sleeve |
NPT |
Mobile maintenance units |
| CB-SP-6FN-FF |
Full-flow internal design |
NPT / BSPP |
Industrial high-flow lines |
| CB-SP-6FN-RW |
Railway-optimized |
Metric |
Rail hydraulic systems |
| CB-SP-6FN-FD |
Fireproof & dry-seal |
Custom |
Fire-rescue, aviation |
Frequently Asked Questions (FAQ)
Q1: Are these couplers interchangeable with other ISO 16028 brands?
Yes. Carterberg FF couplers are compatible with Stucchi FIRG, Parker FEM, Faster FF, Hansen FF, and others.
Q2: Can they be used under residual pressure?
Yes, especially the CB-SP-6FN-QA and -RW versions are built for connect-under-pressure conditions.
Q3: Do you offer BSPP or metric ports?
NPT is standard, but BSPP and metric options are available on request.
Contact & Inquiry
Looking for specific sizes, threads, or seal combinations?
Contact our technical team for expert guidance or submit a custom request below.
