Parker's park brake valves are designed for long, reliable service life while holding the aircraft stationary in the closed (locked) position. Valve models range from fairly simple devices to more complex models with additional features.
-65° to +275°F
60° to 90° angle
Multiple fluids MIL-PRF-5606, MIL-PRF-83282 and MIL-PRF-87257
0.5 lb to 5.5 lb