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Cabin Pressure Control Systems

Cabin Pressure Control Systems

Fourth-Generation Digital Cabin Pressure Control System

Flying is safer and more comfortable thanks to Honeywell, the leader in reliable systems that monitor and maintain cabin pressure. Now Honeywell is taking cabin-pressure technology to new heights with the Fourth-Generation Digital Cabin Pressure Control System (DCPCS). 

The fourth-generation system offers distinct advantages over the legacy systems flying in today’s business and regional jets.

The new system provides superior performance at all altitudes and under all operating conditions. Honeywell engineers have designed a system that not only outperforms prior competing systems, but also reduces the lifecycle service costs for the operators.

The Fourth-Generation DCPCS is smaller and lighter than other systems, with an innovative design that reduces total weight by 30 percent compared to a comparable prior-generation systems.

The new Honeywell DCPCS raises the bar on reliability, operating costs and dormant function failure detection compared to current systems using brushed DC technologies. Brushless dc auto motor and built-in test of the altitude limit and manual control function enables operators to improve dispatch reliability and mission effectiveness. Higher reliability also means reduced downtime, lower operating costs and less maintenance.

The Honeywell Difference

With innovations like the first Fourth-Generation Digital Cabin Pressure Control System, Honeywell continues its long legacy of pressure control system leadership that dates back more than 75 years – a legacy from names like Garrett, AirResearch, NormalAir and now Honeywell. You’ll find our systems on regional- and large-category air transport aircraft; military fighters, trainers and cargo aircraft; light jets, turboprops and piston aircraft worldwide. More than 20,000 Honeywell cabin pressure systems are flying today.

Our background as an avionics manufacturer and integrator ensures proper system operation and a smoother path to aircraft certification. And our use of data buses and other connected aircraft technologies enables the cabin pressure control system to perform extra monitoring and prognosis functions.

Our systems can also enable creative uses of cabin air, including thrust, air flow biasing of cabin exhaust, and multiple ventilation schemes, including fuel vapor evacuation, discharge through jet ejectors and multiple fuselage compartment pressurizations.

Features for any platform

Honeywell can perfectly match your specific aircraft configuration and comfort needs with a flexible array of cabin pressure product offerings, including:

  • Thrust recovery outflow valve systems that optimize cabin air exhaust for improved fuel efficiency
  • All-electric butterfly outflow valve systems optimizing system weight
  • Single or multiple outflow systems to aid in cabin comfort and ventilation of heat and odors
  • Digital electronic controls to fit airplane cost, performance, flexibility, and valve configuration needs
  • Pressure sensor integration to provide control and monitoring functions necessary for certification
  • Pneumatic regulators and safety valves for simple control and backup positive and negative pressure relief functionality

Mechanical negative relief valves and pneumatic or electronic accessories to complete basic system architectural needs

A Legacy of Excellence

Honeywell’s history of innovation includes:

System Aircraft
First cabin pressure regulator for a successful production aircraft Boeing B-29
First electronic pressurization system Boeing 707
First all-electric thrust recovery system Lockheed C-5
First automatic pressure schedule Douglas DC-10
First (and only) high-altitude supersonic commercial airliner system Aerospatiale/BAC Concorde
First digital electronic system in general aviation Rockwell Saberliner
First digital electronic system in commercial aviation Boeing 757/767
First digital electronic system in military aviation Boeing F/A-18
First integrated bleed air/cabin pressure system Boeing 777
First business aviation 3-motor outflow valve Gulfstream GV
First business aviation thrust recovery system Gulfstream G550
Patented integration of control and monitoring function on an outflow valve Hawker 4000
First multiple outflow valve system in a business aircraft Falcon 7X
First control of cabin pressure via jet ejector exhaust path Falcon 7X
Patented general aviation motor control technology for an all-electric outflow valve Embraer Phenom 100 and 300
Control and monitoring with semi-automatic control architecture Airbus A350
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Fourth-Generation Digital Cabin Pressure Control System
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What is a cabin pressure system?

Cabin pressurization is a process in which conditioned air is pumped into the cabin of an aircraft or spacecraft in order to create a safe and comfortable environment for passengers and crew flying at high altitudes.

Why airplanes have pressurized cabins?

Cabins are pressurized to create a safe and comfortable environment for pilots, crew and passengers. At high altitudes the air is thinner than it is on the ground.

How does airplane cabin pressure work?

To maintain the pressure in the cabin equal to that at low altitude, even while the airplane is at 30,000 feet, the incoming air is held within the cabin by opening and closing an outflow valve, which releases the incoming air at a rate regulated by pressure sensors.

How do airplanes pressurize the cabin?

Airplanes pressurize their cabins by pumping air into them. As their jet engines suck in air, some of the excess air is diverted into the airplane's cabin and once the cabin achieves an ideal pressure level, the airplane will maintain it. Most airplanes control their cabin pressure via an outflow valve.