The Yale GGY range comprises hydraulic pressure gauges with stainless steel housings and acrylic plastic face cover plates. All gauges are glycerine-filled to absorb pressure shocks. The range includes 63 mm and 100 mm dial sizes across pressure ranges from 0-160 bar to 0-2500 bar.
Glycerine-damped for hydraulic systems
Yale documentation describes the GGY range as recommended when the operating pressure (force of the connected cylinder) should be monitored. Yale supplies corresponding pressure-vs-force converting charts for all Yale hydraulic cylinders free of charge - useful for calculating applied cylinder forces from gauge readings. The 63 mm gauges have accuracy class 1.6%; the 100 mm gauges have accuracy class 1.0% (except GGY-2500 which is class 1.6%).
Suitable Applications
Per Yale: monitoring operating pressure during hydraulic operations. Standard fit on Yale solenoid valves (VEP includes GGY-631 as standard). Used across the Yale hydraulic range from hand pumps to power packs.
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
- Glycerine-Filled: absorbs pressure shocks; long service life; jitter-free pointer on motor pumps.
- Stainless Steel Housing: Yale-specified material.
- Acrylic Plastic Face Cover Plate: Yale's standard face material.
- Bourdon Tube Mechanism: standard industrial pressure measurement.
- Multiple Pressure Ranges: 0-160 / 250 / 400 / 600 / 700 / 1000 / 2500 bar.
- Two Dial Sizes: 63 mm and 100 mm.
- GGY-1001 SZ with Maximum Pointer: records peak pressure during operation.
- Converting Charts Free: Yale supplies pressure-vs-force charts for all Yale cylinders free of charge.
Technical Specifications
| Housing Material |
Stainless steel |
| Face Material |
Acrylic plastic |
| Dial Sizes |
63 mm and 100 mm |
| Accuracy Class (63 mm) |
1.6% |
| Accuracy Class (100 mm) |
1.0% (except GGY-2500 = 1.6%) |
| Mechanism |
Bourdon tube, glycerine-filled |
| Pressure Ranges |
0-160 / 250 / 400 / 600 / 700 / 1000 / 2500 bar |
| 63 mm Models |
GGY-631, GGY-632, GGY-633, GGY-634, GGY-635, GGY-636, GGY-639 |
| 100 mm Models |
GGY-1001, GGY-1001 SZ, GGY-1002, GGY-1003, GGY-1004, GGY-1005, GGY-2500 |
| Standard Models |
14 |
Frequently Asked Questions
Q: Why glycerine-filled?
Yale specifies the glycerine fill to absorb pressure shocks. This contributes to long service life and ensures the pointer stays jitter-free when fitted to motor pumps.
Q: What's the GGY-1001 SZ?
Yale's GGY-1001 SZ (0-1000 bar, 100 mm) is equipped with a maximum pointer - records peak pressure reached during operation, useful for post-test verification.
Q: Are calibration charts supplied?
Yes - Yale supplies pressure-vs-force converting charts for all Yale hydraulic cylinders free of charge.
Q: Which gauge for TWAZ?
Yale specifies the GGY-2500 (0-2500 bar, 100 mm) for TWAZ pump applications, combined with the GA-2000 gauge adaptor.
Q: GGY-631 vs GGY-632?
Yale specifies the GGY-631 with G 1/4 oil port (DIN 16288) and the GGY-632 with 1/4 NPT oil port. Both are 0-1000 bar, 63 mm, glycerine-damped.
