Cabin Pressure Regulator

Valve position determines the pressure level in the cabin.

Cabin pressure regulator. The butterfly is spring loaded to the closed position and diaphragm operated to the open position. The regulator controls the position of the outflow valve s normally located at the rear of the aircraft pressure vessel. The check valve on each oxygen supply system between the oxygen regulator and 14 7 psia cabin regulator prevents the reverse flow of oxygen and nitrogen into the oxygen system since the 14 7 psi and 8 psi regulators in each system control the oxygen and nitrogen flow to the cabin as required to maintain the desired cabin pressure.

Udvar hazy center in chantilly va. A speed controlled drive for an air outlet. How is the cabin pressure of a pressurized aircraft usually controlled.

This valve controls the cabin pressure and also acts as a safety relief valve in addition to other safety relief valves. Exterior and interior altitude profile on a typical flight. An illustrated dictionary of aviation copyright 2005 by the mcgraw hill companies inc.

The pressure regulator control is a pneumatic control that provides four modes of cabin pressure operation. On a typical flight as the aircraft climbs to 36 000 feet the interior of the plane climbs to between 6000 8000 feet. Adjustments and settings on the pressure controller are the control input parameters for the cabin pressure regulator.

A by a pressure sensitive switch that causes the pressurization pump to turn on or off as required b by an automatic outflow valve that dumps all the pressure in excess of the amount for which it is set. This object is on display in the boeing aviation hangar at the steven f. The cabin pressure regulator valve is a pneumatically actuated butterfly valve mounted in the cabin exhaust ducting downstream of the cabin exhaust fan.

In addition to the modes of operation a test valve is included with three manually set positions. Pressurization systems are designed to keep the interior cabin pressure between 12 and 11 psi at cruise altitude. A regulator that controls the cabin pressure by regulating the outflow of air.