Aspects herein include a valve to provide regulated fluid flow. The valve comprises a valve housing having an inlet and an outlet. The valve further comprises a valve seat disposed between the inlet and the outlet of the valve. The valve seat has a seat opening defined by a seat opening dimension and is fixed in relation to the valve housing. The valve further comprises a poppet disposed between the valve seat and the outlet of the valve, the poppet having a seat face opposing the valve seat. The seat face tapers from a poppet large dimension larger than the seat-opening dimension disposed toward the inlet end to a poppet small dimension smaller than the seat-opening dimension disposed toward the outlet end. The valve further comprises a plunger operatively coupled with the poppet as well as a solenoid within the valve chamber operatively coupled with the plunger.

A pneumatic controller includes a manifold, a selector, and a biasing member. The manifold has a low pressure port, a high pressure port, an actuator port, and a vent. The selector is movable within the manifold between a first position and a second position, the low pressure port in fluid communication with the actuator port in the first position, the high pressure port in fluid communication with the actuator port in the second position. The biasing member is supported within the manifold and urges the selector towards the first position, wherein the low pressure port is in fluid communication with the vent in both the first position and the second position to cool the biasing member with low pressure fluid received at the low pressure port. Inline valves, gas turbine engines, and methods of controlling fluid flow through inline valves are also described.

An inline valve includes a valve body, a valve member, and a control manifold. The valve body has an exterior, an inlet, and an outlet. The valve member is supported within the valve body and is movable between a first position and a second position. The inlet in fluid communication with the outlet while the valve member is in the first position and the inlet fluidly separated from the outlet while the valve member is in the second position. The control manifold is supported by the valve body, has a reference fluid port and a control fluid port, and is in pneumatic communication with the valve member through the valve body exterior to passive movement of the valve member according to pressure at the valve body inlet. Gas turbine engines and methods of controlling valves are described.

A controller for an inline valve includes a manifold seating a set screw and has a reference fluid port, a control fluid port, and an actuator fluid port. A selector is movable within the manifold between a first position and a second position, the reference fluid port in fluid communication with the actuator fluid port in the first position, the control fluid port in fluid communication with the actuator fluid port in the second position. A biasing member is arranged between the selector and the set screw and urges the selector towards the first position. The set screw extends through an exterior of the manifold for adjustment of differential in pressures at the reference fluid port and the control fluid port responsive to which the selector moves between the first position and the second position. Inline valves and methods of controlling fluid flow through inline valves are also described.

A pneumatic controller for an inline valve includes a manifold with a set screw seated within it, a selector, and a biasing member. The manifold has a low pressure port, a high pressure port, and an actuator port. The selector is movable within the manifold between a first position and a second position, the low pressure port in fluid communication with the actuator port in the first position, the high pressure port in fluid communication with the actuator port in the second position. The biasing member urges the selector towards the first position with a biasing force and is spaced apart from the selector to limit eccentric force exerted on the selector. Inline valves and methods of controlling fluid flow through inline valves are also described.

Described is a system for remotely detecting and signalling the open and/or closed state of the shutter (O) of an element (3) for controlling the flow of gas along a gas distribution line (2), comprising an electric switch (17; 18) configured to generate an electrical signal representing at least one of the open and closed states.

An inline high-recovery flow control valve comprising a tubular housing internally separated into a cylindrical and a contoured diameter section and where the contured portion being subdivided by a reduced diameter bore, a contoured valve plug suitably fastened to a sliding ring which conforms to the cylindrical diameter of the housing, and mechanical means to motivate the ring with attached valve plug to and from the reduced circular bore.

An inline high-recovery flow control valve comprising a tubular housing internally separated into a cylindrical and a contoured diameter section and where the contured portion being subdivided by a reduced diameter bore, a contoured valve plug suitably fastened to a sliding ring which conforms to the cylindrical diameter of the housing, and mechanical means to motivate the ring with attached valve plug to and from the reduced circular bore.

A passive in-line valve configured to be actuated without an external control includes a valve housing defining an inlet, an outlet, and a flow path between the inlet and the outlet and a piston housing extending inwardly from the housing. The valve includes a valve piston movably disposed within the piston housing, the valve piston including an upstream side and a downstream side. The valve also includes a control mechanism disposed at least partially within the housing and configured to port outlet static pressure to the upstream cavity in a first state such that pressure is equalized on the valve piston.

A passive in-line valve configured to be actuated without an external control includes a valve housing defining an inlet, an outlet, and a flow path between the inlet and the outlet and a piston housing extending inwardly from the housing. The valve includes a valve piston movably disposed within the piston housing, the valve piston including an upstream side and a downstream side. The valve also includes a control mechanism disposed at least partially within the housing and configured to port outlet static pressure to the upstream cavity in a first state such that pressure is equalized on the valve piston.