| Model | Size | Outlet Pressure | Flow Capacity | 
| 912 - 104 | 1/4" x 1/4" FNPT | 9.25 - 13 "wc | 8,000,000 BTU | 
| 912 - 197 | 1/4" x 3/8" FNPT | 12 - 24 "wc | 10,000,000 BTU | 
| 912H - 108 | 1/4" x 3/8" FNPT | 0.5 - 2.5 psi | 23,000,000 BTU | 
| 912H - 520 | 1/4" x 3/8" FNPT | 2.5 - 5psi | 23,000,000 BTU |