The Yale FY range comprises 28 high-pressure hydraulic fittings designed for versatile combinations of hydraulic cylinders and accessories. All fittings are designed for a maximum system pressure of 700 bar. Yale supplies double nipples, elbows, tees, crosses, connections, reducers and adaptors covering multiple thread standards (3/8 NPT, 1/4 NPT, BSP, M14, M18, M20, M22).
High-pressure fittings for Yale 700 bar hydraulic systems
Yale documentation states the FY fittings are useful for versatile combinations of hydraulic cylinders. Yale notes an important operational guidance: for improved sealing of 3/8 NPT connections, use 2 layers of teflon tape and tighten accordingly.
Suitable Applications
Per Yale: building custom hydraulic systems, adapting between thread standards, splitting flow paths, and integrating Yale hydraulic equipment into custom machinery. Specialist sets include FY-703 (connecting set for 4/3-way valve to HPS hand pumps) and FY-201 (hose connector for TWAZ 2000 bar hand pumps).
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
- 700 bar Maximum System Pressure: Yale-specified rating for all fittings.
- 28 Standard Parts: covers most installation requirements.
- Multiple Thread Standards: 3/8 NPT, 1/4 NPT, BSP (G), Metric (M14/M18/M20/M22).
- Specialist Connecting Sets: FY-703 for 4/3-way valve to HPS hand pumps; FY-201 for TWAZ 2000 bar.
- Teflon Tape Sealing Recommended: Yale specifies 2 layers for 3/8 NPT connections.
Technical Specifications
| Maximum Pressure |
700 bar |
| Standard Parts |
28 |
| Common Types |
Double nipples, elbows, tees, crosses, connections, adaptors |
| Thread Standards |
3/8 NPT, 1/4 NPT, BSP (G), Metric (M14/M18/M20/M22) |
| Specialist Sets |
FY-703 (4/3-way valve to HPS pumps), FY-201 (TWAZ 2000 bar) |
| FY-1 Double Nipple |
3/8 NPT outer both ends - recommended for connecting MY manifolds to hand pumps |
| FY-30 Adaptor |
G 3/8 outer to 3/8 NPT inner - for VEP valve A/B ports |
| FY-201 |
Hose connector for TWAZ - R 1/4 outer to M22 x 1.5 outer (with seal cone) |
Frequently Asked Questions
Q: How do I seal 3/8 NPT connections?
Yale specifies the use of 2 layers of teflon tape, tightened accordingly.
Q: What's the FY-703 connecting set?
Yale specifies the FY-703 as the connecting set for mounting a 4/3-way valve (VHH-4/3) to HPS hand pumps. The set uses a telescopic nipple, 3/8 NPT outer to 1/4 NPT outer.
Q: What's the FY-201 for?
Yale supplies the FY-201 as the hose connector for TWAZ hand pumps (2000 bar). R 1/4 outer to M22 x 1.5 outer (with seal cone).
Q: Do I need FY-30 for VEP valves?
Yale notes that if oil ports A and B of the VEP should have 3/8 NPT (rather than the standard G 3/8), the adaptor model FY-30 must be ordered separately.
