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CHAPTER II
COMPONENTS
CYLINDERS & VALVE
The Pyro-Chem Kitchen Knight II System has available three different size cylinders: the Models PCL-300(P/N 551194), PCL-460 (P/N 551193), and PCL-600 (P/N 551196). Cylinder sizes are expressed in terms of extinguishing agent capacity (i.e., the PCL-300 uses 3.0 gallons (11.4 L) of extinguishing agent). The cylinder is manufactured, tested, and marked in accordance with DOT 4BW225. Cylinders come pre-filled with extinguishing agent and are charged with dry nitrogen to a pressure of 225 psig @ 70 0F (15.5 bar @ 21 0C). Cylinder valve assembly dimensions are shown in Figure 2-1.
Figure 2-1. Cylinder and Valve Assembly
| Model No. | A in. (cm) | B in. (cm) | C in. (cm) | D in. (cm) | Max. Flow Point Capacity | Weight lbs.(kg) | Mounting Bracket Used |
| PCL-300 | 8.00 (20.3) | 25.06 (63.7) | 30.81 (78.3) | 22.75 (57.78) | 10 | 53 (24) | MB-15 |
| PCL-460 | 10.00 (25.4) | 25.06 (63.7) | 30.81 (78.3) | 22.75 (57.78) | 15 | 83 (37.7) | MB-15 |
| PCL600 | 10.00 (25.4) | 35.81 (91) | 41.56 (105.4) | 33.50 (85.1) | 20 | 108 (48.9) | MB-1 |
All cylinders utilize the same value assembly (P/N 551175). It is a pressure sealed poppet type valve designed to provide rapid actuation and discharge of agent. See Figure 2-2.
| ITEM | PART NO. | DESCRIPTION |
| 1 | Valve Body | |
| 2 | 550762 | Cap & Seat Washer Sub-Assembly |
| 3 | 550705 | Conical Spring |
| 4 | 550707 | Piston |
| 5 | 550716 | Neck O-Ring |
| 6 | 551236 | Pressure Gauge |
| 7 | 550028 | Stem O-Ring |
| 8 | 550802 | Valve Cap |
| 9 | 550386 | Shrader Valve Assembly |
| 10 | 550714 | Valve Cap O-Ring |
| 11 | 550715 | Piston O-Ring |
| 12 | 550710 | Valve Stem |
| 13 | 551256 | Pressure Regulator |
| 14 | 551261 | Seal |
| 15 | 17851 | 6-32X3/8 Screw |
VALVE REBUILDING EQUIPMENT
1. Wet Valve Seal Rebuilding Kit (P/N 550698).
After system discharge, the valve assembly must be rebuilt to ensure proper future operation. The Wet Valve Seal Rebuilding Kit (P/N 550698) should be used. It includes all components necessary to properly rebuild the valve. See Figure 2-3.
| ITEM | PART NUMBER | DESCRIPTION |
| 1 | 550762 | Cap & Seat Washer Sub-Assembly |
| 2 | 550705 | Conical Spring |
| 3 | 550716 | Neck O-Ring |
| 4 | 550028 | Stem O-Ring |
| 5 | 550715 | Piston O-Ring |
| 6 | 550710 | Valve Stem |
