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型号参数：
| Series | Body | Ports | Seat | Inlet Pressure | Outlet Pressure | Gauge | Inlet/Outlet Connections | Options |
|---|---|---|---|---|---|---|---|---|
| U57 | SL: 316L | A: 2 port | K: PCTFE | G: 300psig | L: 0-30psig | P: with gauge | 91: FSR(1/4"F) | E: 5 μin |
| H: Hastelloy® | B: 3 port | W: without gauge | 92: FSR(1/4"M) | I: Internal 1/4" FSR(F) gauge ports | ||||
| G: 4 port | 41: 1/4" tube weld stub | T: Trim Hastelloy® internal | ||||||
| J: 4 port |
