An air modulating system for a gas turbine engine includes a fixed plate with a fluid passage inlet, a floating plate with a first side adjacent to the fluid passage inlet, an actuated mount configured to move the floating plate relative to the fixed plate, and a linkage element for connecting the floating plate to the actuated mount. The linkage element includes a mounting flange configured to slidably engage the floating plate.

A rotary valve capable of high flow rates, minimal pressure drop, and rapid actuation is presented. According to one aspect, the rotary valve is characterized by a unique pressure balancing system operating on the rotary spool of the valve to reduce side force caused by pressure at the flow ports. According to another aspect, the rotary valve is characterized by a unique internal shiftable blocking spool in response to a failure condition or a modulating signal. According to another aspect, a unique interface is provided for sealing a port of a rotary valve to an outer surface of a rotary spool. According to another aspect, the rotary valve is characterized by a unique interface provided for sealing a port to an outer surface of the rotary spool. According to another aspect, a rotary valve is characterized by a unique three-way three-or-more-position configuration. According to another aspect, a rotary valve is characterized by a unique four-port three-position configuration.

An air modulating system for a gas turbine engine includes a fixed plate with a fluid passage inlet, a floating plate with a first side adjacent to the fluid passage inlet, an actuated mount configured to move the floating plate relative to the fixed plate, and a linkage element for connecting the floating plate to the actuated mount. The linkage element includes a mounting flange configured to slidably engage the floating plate.

A combined valve core with a changeable function includes a valve core body, where the valve core body includes an outer housing, a base, a first operating portion and a second operating portion; a first water inlet for receiving hot water, a second water inlet for receiving cold water, and a water outlet are arranged on the base; a water flow channel communicating with the first water inlet, the second water inlet and the water outlet is formed in the valve core body; the first operating portion is configured to switch the water flow channel in a first switching manner; and the second operating portion is configured to adjust, in a second switching manner, a flow rate of the hot water and a flow rate of the cold water converged into the water flow channel to adjust a temperature of a water flow leaving from the water outlet.

A valve can include a housing, a gate, and a traveler. The housing can include an opening such that material can flow through the opening from the first side to the second side. The gate can be moveable relative to the housing in a first direction between a first gate position and a second gate position. The gate can be moveable relative to the housing in a second direction between the second gate position and a third gate position. The gate can allow material flow through the opening in the first gate position and preventing material flow through the opening in the third gate position. The traveler can be moveable from a first traveler position to a second traveler position. The traveler can be configured to move the gate in the first and second directions as the traveler moves from the first traveler position to the second traveler position.