Stop Light Switch for Air Brakes Ref 13240A H-30591

Emergency Stop Light Switch for Air Brakes H-30591
Reference # 13240A
Port: 1/8" NPT
technically it is the brake light switch or the stop light switch, working with the air pressure in the system. Emergency word comes from the general terminology within the users.

DESCRIPTION
The stop light switch is an electro-pneumatic switch and
operates in conjunction with the brake valve and stop lights
by completing the electrical circuit when a brake application
is made.
OPERATION
When a brake application is made, air pressure from the
brake valve enters At approximately 5 psi, the air pressure overcomes the force of the spring and moves
the piston or plunger until the contact points close completing
the stop light electrical circuit and lighting the stop lights.

Specifications
The PP-DC parking control valve is a push-pull, dashboard mounted valve that is manually operated.
Fully tested for automatic "pop" pressures, and proper crack pressures.