| Series Designation | 873 Series |
| Type | High Flow Reducing Regulator |
| Hand Loaded/Operated or Dome/Air Operated | Hand/Spring Loaded |
| Maximum Rated Pressure | 6000 psi |
| Outlet Pressure Range | 0-400 psi |
| Outlet Pressure Rating | 6000 psi |
| Inlet Port Size | 2 ea 1/4 in. FNPT (One Inlet, One Gauge) |
| Outlet Port Size | 1 ea 1/4 in. FNPT (Gauge), 1 ea 1/2 in. FNPT (Outlet) |
| Flow Coefficient (Cv) | 0.8 (equals 0.23 in. orifice) |
| Outlet Pressure Variations with Inlet Pressure Variations | 10 psi rise/1000 psi inlet drop |
| Leakage | Bubble Tight |
| Weight | 1300 g |
| Overall Length | 6.5 Inch |
| Round Diameter | 3 Inch |
| Minimum Temperature | -15 ºF |
| Body Material | Anodized Aluminum |
| Internal Materials | Anodized AluminumBrassStainless |
| Seal Materials | Kel-FViton |
| Repair Kit/Service Items | 979-400 |
| Accessories | Mount Nuts: P/N 952 (Two Required) |
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