With continuous improvement and enthusiasm over the past 30 years, GRH has developed into an emerging power in the fluid power industry since it was established in 1986.
GRH (Shanghai) - International Sales Office
GRH (Jiangsu) - Manufacturing Facility and Domestic Sales Office
Production description

| Group 2 Gear Pump | ||||||
| MODEL | DISPLACMENT | PRESSUR/MPa) | SPEED/(r/min) | |||
| (ml/r) | RATED | MAX | RATED | MAX | Min | |
| 2PF4L09P02* | 4 | 200(250) | 250(300) | 2000 | 3500 | 500 |
| 2PF6L09P02* | 6 | 200(250) | 250(300) | 2000 | 3500 | 500 |
| 2PF8L09P02* | 8 | 200(250) | 250(300) | 2000 | 3500 | 500 |
| 2PF10L09P02* | 10 | 200(250) | 250(300) | 2000 | 3500 | 500 |
| 2PF12L10P02* | 12 | 200(250) | 250(300) | 2000 | 3500 | 500 |
| 2PF14L10P02* | 14 | 200(250) | 250(300) | 2000 | 3500 | 500 |
| 2PF16L10P02* | 16 | 200(250) | 250(300) | 2000 | 3500 | 500 |
| 2PF18L10P02* | 18 | 200(250) | 250(300) | 2000 | 3500 | 500 |
| 2PF20L10P02* | 20 | 200(250) | 250(300) | 2000 | 3500 | 500 |
| 2PF23L10P02* | 23 | 200(250) | 250(300) | 2000 | 3500 | 500 |
| 2PF25L10P02* | 25 | 200(250) | 250(300) | 2000 | 3500 | 500 |
| 2PF28L10P02* | 28 | 160(200) | 200(250) | 2000 | 3500 | 500 |
| 2PF30L10P02* | 30 | 160(200) | 200(250) | 2000 | 3500 | 500 |
| 2PF4F02Z03* | 4 | 200(250) | 250(300) | 2000 | 3500 | 500 |
| 2PF6F02Z03* | 6 | 200(250) | 250(300) | 2000 | 3500 | 500 |
| 2PF8F02Z03* | 8 | 200(250) | 250(300) | 2000 | 3500 | 500 |
| 2PF10F06Z03* | 10 | 200(250) | 250(300) | 2000 | 3500 | 500 |
| 2PF12F06Z03* | 12 | 200(250) | 250(300) | 2000 | 3500 | 500 |
| 2PF14F06Z03* | 14 | 200(250) | 250(300) | 2000 | 3500 | 500 |
| 2PF16F06Z03* | 16 | 200(250) | 250(300) | 2000 | 3500 | 500 |
| 2PF18F06Z03* | 18 | 200(250) | 250(300) | 2000 | 3500 | 500 |
| 2PF20F06Z03* | 20 | 200(250) | 250(300) | 2000 | 3500 | 500 |
| 2PF23F06Z03* | 23 | 200(250) | 250(300) | 2000 | 3500 | 500 |
| 2PF25F06Z03* | 25 | 200(250) | 250(300) | 2000 | 3500 | 500 |
| 2PF28F06Z03* | 28 | 160(200) | 200(250) | 2000 | 3500 | 500 |
| 2PF30F06Z03* | 30 | 160(200) | 200(250) | 2000 | 3500 | 500 |
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