Aircraft Valves - Please fill out the form below to send a request to one of the companies below.
The ball valve is an automatic safety device designed to allow fluid and gas to flow in one direction and prevent backflow. under pressure The fluid enters the valve at the inlet, forcing the disc out of the valve seat and out through the outlet.
Aircraft Valves
The flow will continue as long as the control keeps the disc open. when there is a power failure The disc automatically returns to its position to close the flow.
Valve Operating Mechanism
The pressure at which the valve opens is called the differential pressure. This can vary from 3 psi to 350 psi depending on the size, purpose and function of the check valve.
The check valve ensures that the gas or liquid flows in the right direction. and create a tight seal to prevent leakage. with fluid control The check valve protects the pump and compressor from serious damage.
The name of the check valve changes depending on its use and manufacture. Various names include clack, non-return (NRV), reflux, hold and one-way valves, regardless of their simplicity of design and operation. These are important in protecting pumps, pipes and moving water.
The most common type of check valve is swing valve, can be seen in the picture below. It is a full port where the disc is on the road during the water flow. Open disc flow direction When the flow continues The disc remains open. when the flow slows down or stops The plate moves by gravity to a closed position.
Air Management 101
The main function of the check valve is to prevent backflow. This can damage the pump and other components when the shutoff valve closes. Water hammer may occur where the fluid in the system hits a shutoff valve. The behavior of this check valve should be flexible and stable. and made of good materials
Check valves can be noisy and should be noise reduced. To this end, various controls have been added. To control surges and prevent the valve from knocking, springs, levers or weights are built into the valve design.
A variety of check valves are available to suit a variety of applications. They are used in business and industry, in the garden, they control the flow of fertilizers and water in the pipes. The aerospace and aerospace industries use check valves to control corrosive fluids, hydraulic systems, and oil flow.
Although the function of the check valve is the same no matter where it is used. The type of check valve varies according to the flow rate. Media gravity and temperature, line size, pressure and flow velocity. which can be seen in the table below.
Mag Probe Testing Aircraft Solenoid Valves Is Critical
The selection of the check valve must suit the requirements of the application. When an engineer chooses a check valve, they switch to medium type, large pipe, high gradient. water speed and type of pump mechanism Monitoring of these conditions is necessary to ensure a safe operation or process. and protect the equipment
There are many choices of check valves. Two models that can be purchased at home improvement stores. to create special designs to suit special requests. This variety makes it difficult to provide a list of all checks. Because there are new developments every day. Of the many check valves The details are many for each type.
The swing check valve is a self-operated valve that acts as a backstop or unidirectional valve. They have discs that swing hinged away from the seat of the valve to allow forward flow. when the flow stops It will swing back into position to stop the reverse. The weight of the disc must be sufficient to prevent the impact of the reverse flow. The swing draw valve has an irregular and low flow rate.
Lever and heavy check valves are used where water hammer is likely to occur. while lever and spring valves are used for high pressure and high speed. Regardless of the type of swing check valve Discs should be checked and cleaned regularly.
Aircraft Fuel System: Non Return Valve Chest And Air Vent Shut Off Valve
Wafer type check valves have separate plates that swing to block or allow flow. Media flows in one direction. This lifts the disc out of the seat. when the runner is counter to each other The disc closes to create a seal to prevent the return. Usually, the spring or power is attached to the disc to speed up and reduce the water hammer build up.
The thin, short and compact design of the wafer check valve makes it ideal for small pipelines and systems that are loaded or semi-loaded.
The tilt disc check valve has a pivot point in the center of the disc to allow fluid to flow to the top and bottom of the disc. It is usually used where the frequent return. When the plate is open, the flow is still open. This is unlike a swing check valve where the speed of the flow causes it to open. The discs are small and light with their center of gravity close to the pivot point. Less pressure drop with low flow and higher pressure drop with high flow rate
Check valves use a ball that moves inside the valve to block the flow. The valve seat is designed to fit around the ball and has a conical chamber that guides the ball to the seat. The weight of the ball will vary depending on the capacity of the pump and the capacity of the water hammer.
Anti Ice Valves
The reverse moves the ball back to its seat to close the flow. When there is interest in the flow The ball will be removed from the flow. when the heart falls He will come down and take to the seat.
Throttle check valves are also called dual-flap, dual-plate, or split check valves. Half of the plate is open on the middle line. as seen in the picture when the fluid flows forward with reflux The halves open and close the casing, the short that the halves must go to reduce the impact of the disc. The throttle check valve operates very quietly. Therefore it is suitable for heating, ventilation and air conditioning.
The water flow to the valve lifter goes under the seat of the valve. The pressure of the flow lifts the disc or ball off the seat. As the flow weakens, slows down, reverses or stops, gravity causes the disc or ball to slide the seat. Ideal for systems with high flow rates and high speeds.
Silent check valve, also known as poppet check valve Do not drink water hammer or shock by closing before the fluid returns. The advantage of the silent check valve is its fast and smooth closing. which prevents damage to surrounding objects.
Anti Ice Pressure Regulating Shut Off Valves
Duckbill check valves are made of synthetic rubber or elastomer and resemble a duck's beak. The open end of the valve is connected above the outlet to the equipment. The other end kept its original shape. Upstream pressure forces the platypus to open the water. when the pressure increases the lips will open wide when the pressure decreases the lips will be flat and closed.
The diaphragm check valve has a rubber diaphragm or disc = c. The valve is in the seat with the sealing surface of the valve inlet side and the base opening. The reverse flow causes the rubber flap to close the opening which closes the inlet.
The foot check valve is located at the bottom of the pipe connected to the pump. They act like a check valve with a waste screen. The opening of the valve is larger than the opening of the line. Foot valve allows the pump to pre-empt. When the pump is working, the water is drawn through the hose and the foot valve, when the pump is closed, the water in the hose is pulled back by gravity. The foot check valve blocks the entry of water as it descends and is closed by the weight of the water.
Air check valve or air check valve Controls the flow of air from the compressor by letting air in and preventing it from escaping. They are in pneumatic circuits where the air must be in one direction.
Whittaker Aircraft Motor Actuated Valve P/n 137275
Since the invention of self-closing valves in the beginning of the 20th century, they have become the answer to backflow problems in many industries.
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