Yale CFY female coupler halves are self-sealing quick-connect couplers rated for 700 bar. Yale specifies the design with inner balls that seal the coupler halves in un-coupled condition, preventing hydraulic fluid leakage. The CFY range covers four thread variants: CFY-1 (3/8 NPT outer - standard), CFY-2 (3/8 NPT inner), CFY-18 (M18 x 1.5 outer), CFY-10-S (Pipe Ø 10 mm).
Standard female coupler half supplied with all Yale cylinders
Yale specifies that all Yale hydraulic cylinders are equipped with the standard female coupler half CFY-1 and dust cap CDF-9. The self-sealing design means coupler halves only need to be closed hand tight. Yale provides an important operational note: hydraulic couplers must always be completely closed, since otherwise the circulation cannot be released.
Suitable Applications
Per Yale: standard coupler half on all Yale 700 bar hydraulic cylinders, hand pumps and equipment. CFY-1 is the standard variant; CFY-2/CFY-18/CFY-10-S serve specific custom fitting requirements.
Every part of the circuit carries a pressure rating, and the system is limited by its lowest-rated component — check these against the pump and cylinder in use.
Key Features
- Self-Sealing Female Half: inner ball mechanism seals in un-coupled condition.
- Hand-Tight Closure: no tools required to mate.
- 700 bar Maximum Pressure: Yale standard.
- Four Thread Variants: covers most installation requirements.
- CDF-9 Dust Cap Compatible: fits both female and male coupler halves.
Technical Specifications
| Type |
Self-sealing female coupler half |
| Maximum Pressure |
700 bar |
| CFY-1 |
3/8 NPT outer thread (Yale standard) |
| CFY-2 |
3/8 NPT inner thread |
| CFY-18 |
M18 x 1.5 outer thread |
| CFY-10-S |
Pipe Ø 10 mm |
| Mating Half |
Yale CMY male coupler |
Frequently Asked Questions
Q: Which CFY variant?
Yale specifies CFY-1 (3/8 NPT outer) as the standard - supplied with all Yale cylinders and most equipment. CFY-2/18/10-S serve specific custom fitting requirements.
Q: Do couplers need to be fully closed?
Yes. Yale warns: hydraulic couplers must always be completely closed, since otherwise the circulation cannot be released.
Q: Are dust caps included?
Yale's CDF-9 dust cap is standard with all female coupler halves. The dust cap fits both female and male coupler halves.
