CB-SP-6FN-PTR Threaded Flat Face Hydraulic Quick Coupling – Anti-Blowout Design | Carterberg
Product Overview
The CB-SP-6FN-PTR quick coupling from Carterberg is a flat face valve design combined with a threaded sleeve locking mechanism, engineered for demanding hydraulic applications where cleanliness and safety matter. Built with zinc-plated carbon steel and precision-machined internals, it delivers low leakage, blowout protection, and secure connection in high-vibration environments.
Key Features
• Flat face valve minimizes fluid spillage and air inclusion during disconnection, ideal for overhead hydraulic applications.
• Threaded sleeve lock provides robust mechanical retention to prevent accidental disconnection under vibration or external impact.
• Anti-blowout bonded seal prevents internal damage or seal loss during high-pressure disconnects.
• Dirt-resistant sleeve cover keeps the retaining ring and locking components clean, ensuring smooth operation over time.
• Zinc-plated finish with yellow chromate coating provides extended corrosion resistance in aggressive environments.
• Compact design with no internal poppet separation allows quick and easy flushing and maintenance.
• Fully compatible with NITTO 350 series couplings.
Construction & Design
The internal guiding structure is designed to reduce the ingress of debris during connection or disconnection. The rotating sleeve engages a spring-loaded dust seal to protect the retaining ring area. Compact profile fits standard hydraulic thread ports, enabling quick coupling even in tight spaces.
Technical Specifications
| Parameter | Value |
| Body Sizes Available | 1/4", 3/8" |
| Rated Pressure | 5000 PSI |
| Rated Flow | 3 GPM (1/4") / 6 GPM (3/8") |
| Temperature Range | -20°C to +120°C |
| Spillage (max per connect) | 0.015 mL |
| Air Inclusion (max) | 0.020 mL |
| Seal Material | NBR |
| Locking Mechanism | Threaded Sleeve (manual rotation) |
| Valve Structure | Flat Face (no residual trap) |
Dimensional Overview
Female (Socket)
| PART NO. | LS | ΦD | HEX1 | A | T |
| CB-S2S-6FN-PTR | 59.3 | 30.4 | 27 | 14 | ZG1/4 NPT1/4 |
| CB-S3S-6FN-PTR | 71.1 | 31.5 | 30 | 16 | ZG3/8 NPT3/8 |
Male (Plug)
| PART NO. | LP | C | HEX2 | A | T |
| CB-P2S-6FN-PTR | 64 | 20.5 | 19 | 14 | ZG1/4 NPT1/4 |
| CB-P3S-6FN-PTR | 71 | 25.5 | 24 | 16 | ZG3/8 NPT3/8 |
Application Scenarios
The CB-SP-6FN-PTR is ideal for:
• Hydraulic systems in power transmission maintenance (e.g., overhead bucket tools)
• Railway and mining equipment where fluid cleanliness and blowout risk must be minimized
• High-pressure construction tools requiring frequent connection/disconnection
• Any hostile environment requiring minimal leakage and reliable threaded locking
Why It Matters
Unlike traditional ball valve thread-to-connect couplers, the CB-SP-6FN-PTR employs a flat-face valve structure, drastically reducing residual fluid loss and contamination. The sleeve-locking threaded mechanism ensures no accidental disconnection during operation, even under strong vibration or torque. For engineers and technicians prioritizing leak prevention and operational safety, this model offers a superior alternative.
Future Categorization
This product will later be moved into Carterberg’s Thread-to-Connect Hydraulic Coupling category. Additional sizes and sealing options will be made available.
Related Links
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