Component Descriptions
06-237619-001 2-21 April 2020
2-6 LOCKOUT VALVES
Note: Required in conjunction with use of time delay.
A lockout valve is a manually operated valve installed between the agent manifold and the
discharge pipe to the protected area. The lockout valve can be locked in the closed position to
prevent agent from discharging into the protected area. The lockout valve shall be installed at
the end of the agent manifold or, if a common manifold protects multiple hazards, after each
selector valve. Lockout valves include a limit switch.
Lockout valve assemblies include a high visibility indicator and weatherproof limit switch. The
limit switch shall initiate a “Trouble” signal at the control panel when the valve is in the closed
position. All valves have a maximum pressure rating of 2031 PSI (140 bar). When using
lockout valves, a pressure relief valve should also be installed wherever pressure could be
trapped in closed sections of pipe.
The lockout valves are available in sizes 1” through 4”.
Figure 2-27. 1”, and 2” Lockout Valves
Table 2-17. Lockout Valves Dimensions and Part Numbers for 1 1-2” and 2” valves (U.S. Customary Units)
Valve
Size
Part Number
Approximate Dimensions (inches)
ABC D E F GH I J
1” 38-409830-005 1.0 4.1 2.6 6.5 ± .1 4.5 6.1 ± .1 3.0 1.1 1.4 2.9
2” 38-409830-007 1.9 7.1 3.9 8.3 ± .1 4.6 7.8 ± .1 5.0 2.1 1.5 4.2
Table 2-18. Lockout Valves Dimensions and Part Numbers for 1” and 2” valves (SI Units)
Valve
Size
Part Number
Approximate Dimensions (mm)
ABC D E F GH I J
1” 38-409830-005 24 103.1 66.2 164 ± 3 113 156 ± 3 75.6 28.5 36 74
2” 38-409830-007 47.5 180 100 211 ± 3 116 198 ± 3 126.1 53.3 37 107
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