The Yale TWAZ range comprises high-performance hand pumps with maximum operating pressure of 2000 bar, designed for specialist applications including bolt tensioning. Three models cover reservoir volumes of 0.7, 1.3, and 2.3 litres. The two-stage design allows rapid pressure build-up, with both pressure stages equipped with externally-adjustable limiting valves.
Designed for 2000 bar specialist applications
Yale lists the TWAZ applications as pressurizing hydraulic nuts and safety couplings, hydrostatic testing, bolt tensioners, high-pressure oil injection for bushing removal, pretensioning of anchors, test applications in laboratories, and as a power source within test stands and propeller press systems. 2000 bar operation requires specialist hoses and fittings (e.g. HH-2001-20 hoses) - standard 700 bar Yale accessories are NOT rated for TWAZ pressure.
Suitable Applications
Per Yale: pressurizing hydraulic nuts, safety couplings, hydrostatic testing, bolt tensioners, high-pressure oil injection for bushing removal, pretensioning of anchors, laboratory test applications, test stands, propeller press systems.
Key Features
- 2000 bar Maximum Operating Pressure: Yale's specialist high-pressure range.
- Two-Stage Design: rapid pressure build-up; both stages with externally-adjustable limiting valves.
- M22 x 1.5 Oil Port: specialist high-pressure connection - NOT standard 3/8 NPT.
- Optional GGY-2500 Pressure Gauge: 0-2500 bar for high-pressure monitoring.
- Optional GA-2000 Gauge Adaptor: matches M22 x 1.5 oil port with seal cone.
- Optional FY-201 Adaptor: M22 x 1.5 to R 1/4 for connecting tensioning equipment.
- HH-2001-20 Hose Compatible: specialist 2000 bar hose, 20 mm rating.
Technical Specifications
| Maximum Pressure |
2000 bar |
| Action |
Two-stage hand pump |
| Oil Port |
M22 x 1.5 (NOT standard 3/8 NPT) |
| Pressure Relief Valve |
Yes - externally adjustable |
| TWAZ-0.7 |
0.7 L, 8 cm3 stage 1 / 0.6 cm3 stage 2, 7.0 kg |
| TWAZ-1.3 |
1.3 L, 13 cm3 / 1.0 cm3, 9.0 kg |
| TWAZ-2.3 |
2.3 L, 31 cm3 / 1.6 cm3, 16.0 kg |
Frequently Asked Questions
Q: Can I use standard 700 bar Yale couplers and hoses with TWAZ?
No. The TWAZ operates at 2000 bar - three times the rated pressure of standard 700 bar Yale equipment. Use only specialist 2000 bar hoses (e.g. HH-2001-20) and fittings. Yale specifies M22 x 1.5 oil port (not standard 3/8 NPT) to prevent accidental cross-connection.
Q: What pressure gauge fits the TWAZ?
The optional GGY-2500 (0-2500 bar, 100 mm dial) is Yale's specified gauge for TWAZ applications. The GA-2000 gauge adaptor provides the connection.
Q: What's the HPS-1/1500 A?
Yale's HPS-1/1500 A is a different high-pressure hand pump for 1500 bar applications - hydraulic nuts, bolt tensioning cylinders, hydraulic safety couplers. Single-stage 0.16 L pump with G 1/4 oil port.
