| Item | Description |
| 1 | Seal Gas Booster |
| 2 | Check valve |
| 3 | Isolation valves low transmitter |
| 4 | On/Off Valve, actuated |
| 5 | Differential Pressure Transmitter |
| 6 | Bypass Orifice |
| 7 | Optional filter - single or duplex, upstream placement (illustrated) or, downstream placement (not illustrated) |
| 8 | Temperature monitoring |
| 9 | Point drain |