The Model 4381 is a stainless steel pressure-reducing regulator designed to handle small to mid-capacity flow rates in general. This model is capable of controlling outlet pressure to a level between 2 and 500 psig (0.14 and 34.5 Barg) with a maximum inlet pressure up to 1500 psig. By having thirteen different trim combinations with the option of a soft or metal seat, the model 4381 can be utilized in different applications such as industrial gases, air, oil, steam, water, and, chemical or cryogenic services.
| Maximum Cv | 0.5 |
| Options | Cryogenic construction, panel mounting |
| Body Size | ¼”, ⅜”, ½”, ¾”, 1" |
| Materials | Body: ASTM A479 316L SST Spring Chamber: ASTM B62 BRZ, ASTM A351 Gr.CF3M SST Trim: SST Seat: Metal – 316 SST (ANSI/FCI 70-3 CL.IV) Composition- TFE, EPDM (ANSI/FCI 70-3 CL.VI) Diaphragm: 302 SST, TFE-Coated SST, Neoprene, EPDM |
| Pressures | Inlet: up to 1500 psig (103 barg) Outlet: 2 – 500 psig (140 mbarg to 34 barg) |
| Temperature Range | -325°F to +400°F (-198°C to +204°C) |
| End-Connections | NPT, RF flanged #600 #900 #1500 |
