Havacılık Valfleri

A series of three- or four-way electrohydraulic servovalves (EHSVs) that drive actuators or motors in closed-loop servosystems used to control position, velocity, and force in hydraulic systems, fuel systems, and engine control applications.

Parker's dual flow shutoff valve (DFSOV) is used on the inert gas generation system of an aircraft to control the nitrogen enriched air (NEA) flow to the fuel tanks.

Parker Aerospace anti-ice pressure regulating shut-off valve controls the application of HP3 air to the downstream anti-ice pressure relief valve to maintain the engine intake (nacelle) free from ice under fault-free operation.

Incorporates a number of solenoid valves (two to six) that are used to control pneumatic valves. The solenoid bank is designed to be located in zone two of the engine. The solenoid valves are connected, via servo pipes, to individual pneumatic valves.

Vent valves are often installed to close the vent lines when fuel is present. As fuel rises in the tank, the float swings up due to buoyancy forces until the poppet mates against the housing.

The wing tank is divided into a number of semi-sealed compartments that allow easy fuel migration inboard while minimizing fuel migration outboard. The compartments contain check valves that are the boundaries between compartments.

The fuel swing check valve is an inline, swing flapper check valve that has many uses; one of which is to prevent reverse fuel flow from the ejector pumps to the engine feed subsystem.

The motor-operated fuel shutoff valve is spar-mounted and is driven by a 28 VDC brush-type motor actuator to open and close when electrically commanded.

When the aircraft is connected to a ground refueling source, the fuel management system commands the refuel shutoff valve to close when the selected fuel quantity is reached in conjunction with the refuel control solenoid or pilot-operated float valve.

Engine feed shutoff valves are ball valves operated by 28 vdc motor actuators.  Each valve is installed in an engine feed fuel line to prevent fuel from flowing into wing fire zones during an engine shutdown.

A transient bleed valve (TBV) is used to expand the stall margin of a turbine engine’s compressor by controlling the outlet of bleed air from the engine’s compressor.

The potable water fill valves and lavatory rinse/fill valves provide a durable and reliable interface for connecting to ground service carts. Each interface is sized to only connect to the correct service hose.

The climb and dive valve controls tank-to-ambient and ambient-to-tank pressure differentials during ground and flight operations. When an aircraft climbs, ambient air pressure decreases; during aircraft descent, ambient pressure increases.

Handling bleed valves (HBVs) control the outlet of bleed air from the engine and into other aircraft systems. They are primarily used for engine starting, transient bleed, and surge control.

The turbine clearance control valve (TCCV) modulates the flow of cooling air into turbine tip clearance control systems in gas turbine engines.

The auxiliary power unit (APU) feed shutoff valve is a ball valve operated by a 28 VDC motor actuator. The valve is installed in the APU feed fuel line to prevent fuel from flowing into the APU compartment during an APU shutdown.

Refuel control solenoid valves are installed in the pilot lines between the refuel-shutoff valves and the fuel tanks.  When powered open, they enable the refuel-shutoff valves to open for fueling. When closed, their refuel valves close also.

Parker Aerospace filter bypass valve provides emergency flow of lubricating oil to turbine engines when the filter is clogged or missing.

Pressure-regulating valve is a control valve that reduces the input pressure of a fluid to a required value at its output. Alternatively, it is a valve that works in a way that at a certain pressure, it automatically stops the flow of a liquid.

Multifunction valves for oil service allow for gravity fill, remote fill, and even remote automatic overfill.

Parker Aerospace fuel manifolds provide fuel distribution to multiple injectors (nozzles) on gas turbine engines and can offer single or multiple circuits for staged flows.

Parker Aerospace anti-draindown valves prevent the draining of lubricating oil from the tank or reservoir through lubrication system components (like pumps) into the gearbox.

aerospace-valves

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