正大流体专业代理美国HIP公司高压产品，其产品被广泛应用于工业仪表、OEM、航空航天及军事领域，并为广大用户提供工程设计建议、制造、销售服务等。主要高压阀门产品包括：高压单向阀、顺序阀、压力释放阀、溢流阀、气控先导开关阀。
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选型表（HIP high pressure needle valve）
| 工作压力 | 接口 | 节流孔 | 直通阀 | 直角阀 | 双工作口三通阀 | 单工作口三通阀 | 双操作杆三通阀 |
| 69MPa | 1/4" | 1/8" | 10-11AF4 | 10-12AF4 | 10-13AF4 | 10-14AF4 | 10-15AF4 |
| 3/8" | 1/8" | 10-11AF6 | 10-12AF6 | 10-13AF6 | 10-14AF6 | 10-15AF6 |
| 3/4" | 33/64" | 10-11LF12 | 10-12LF12 | 10-13LF12 | 10-14LF12 | 10-15LF12 |
| 1" | 11/16" | 10-11LF16 | 10-12LF16 | 10-13LF16 | 10-14LF16 | 10-15LF16 |
| 100MPa | 1/16" | 0.052" | 15-11AF1 | 15-12AF1 | 15-13AF1 | 15-14AF1 | 15-15AF1 |
| 1/8" | 1/16" | 15-11AF2 | 15-12AF2 | 15-13AF2 | 15-14AF2 | 15-15AF2 |
| 138MPa | 1/4" | 1/8" | 20-11LF4 | 20-12LF4 | 20-13LF4 | 20-14LF4 | 20-15LF4 |
| 3/8" | 13/64" | 20-11LF6 | 20-12LF6 | 20-13LF6 | 20-14LF6 | 20-15LF6 |
| 9/16" | 5/16" | 20-11LF9 | 20-12LF9 | 20-13LF9 | 20-14LF9 | 20-15LF9 |
| 3/4" | 7/16" | 20-11LF12 | 20-12LF12 | 20-13LF12 | 20-14LF12 | 20-15LF12 |
| 1" | 9/16" | 20-11LF16 | 20-12LF16 | 20-13LF16 | 20-14LF16 | 20-15LF16 |
| 138MPa | 1/4" | 1/8" | 20-11LF4 | 20-12LF4 | 20-13LF4 | 20-14LF4 | 20-15LF4 |
| 3/8" | 13/64" | 20-11LF6 | 20-12LF6 | 20-13LF6 | 20-14LF6 | 20-15LF6 |
| 9/16" | 5/16" | 20-11LF9 | 20-12LF9 | 20-13LF9 | 20-14LF9 | 20-15LF9 |
| 3/4" | 7/16" | 20-11LF12 | 20-12LF12 | 20-13LF12 | 20-14LF12 | 20-15LF12 |
| 1" | 9/16" | 20-11LF16 | 20-12LF16 | 20-13LF16 | 20-14LF16 | 20-15LF16 |
| 207MPa | 1/8" | 1/16" | 30-11HF2 | 30-12HF2 | 30-13HF2 | 30-14HF2 | 30-15HF2 |
| 1/4" | 3/32" | 30-11HF4 | 30-12HF4 | 30-13HF4 | 30-14HF4 | 30-15HF4 |
| 3/8" | 1/8" | 30-11HF6 | 30-12HF6 | 30-13HF6 | 30-14HF6 | 30-15HF6 |
| 9/16" | 1/8" | 30-11HF9 | 30-12HF9 | 30-13HF9 | 30-14HF9 | 30-15HF9 |
| 1" | 7/16" | 30-11HF16 | 30-12HF16 | 30-13HF16 | 30-14HF16 | 30-15HF16 |
| 414MPa | 1/8" | 1/16" | 60-11HF2 | 60-12HF2 | 60-13HF2 | 60-14HF2 | 60-15HF2 |
| 1/4" | 1/16" | 60-11HF4 | 60-12HF4 | 60-13HF4 | 60-14HF4 | 60-15HF4 |
| 3/8" | 1/16" | 60-11HF6 | 60-12HF6 | 60-13HF6 | 60-14HF6 | 60-15HF6 |
| 9/16 | 1/16" | 60-11HF9 | 60-12HF9 | 60-13HF9 | 60-14HF9 | 60-15HF9 |
| 690MPa | 1/4" | 1/16" | 100-11XF4 | 100-12XF4 | 100-13XF4 | 100-14XF4 | -- |
