A hydraulic cartridge valve includes a movable member and a position monitoring mechanism configured to detect the position of the movable member. The position monitoring mechanism is adapted to generate a position signal indicative of the position of the movable member. The position monitoring mechanism can be in the form of a linear variable differential transformer (LVDT).

A hydraulic cartridge valve includes a movable member and a position monitoring mechanism configured to detect the position of the movable member. The position monitoring mechanism is adapted to generate a position signal indicative of the position of the movable member. The position monitoring mechanism can be in the form of a linear variable differential transformer (LVDT).

A valve assembly for a medical device that includes an enclosure to store an agent, a funnel coupled to the enclosure, and configured to receive the agent via an opening of the enclosure, and a valve fluidly coupled to the enclosure and the funnel. The valve is at least partially disposed between the enclosure and the funnel, and at least a portion of the agent is received on the valve. The valve is configured to move from a first position to a second position relative to the enclosure and the funnel to selectively release the agent from the enclosure into the funnel. In the first position, the valve is configured to close the opening and inhibit the agent from exiting the enclosure and entering the funnel. In the second position, the valve is configured to open the opening and release the agent from the enclosure for delivery into the funnel.

Actuators for fluid catalytic cracking unit slide valves and similar valves are disclosed. The actuator frame is assembled by bolting, allowing for standardized configurations that permit stocking of parts and avoids prior art problems of dealing with actuators designed for each individual project, allowing for rapid assembly of new actuators on demand that suit each project by varying the incorporated components, as well as permitting for more-rapid servicing when necessary. Additionally, the instrumentation for the actuator is contained within the actuator frame, better protecting the instrumentation from damage such as from being struck. The actuator includes a new manual engagement system, providing for better engagement of manual controls to actuate the actuator and the accompanying valve when necessary.

Actuators for fluid catalytic cracking unit slide valves and similar valves are disclosed. The actuator frame is assembled by bolting, allowing for standardized configurations that permit stocking of parts and avoids prior art problems of dealing with actuators designed for each individual project, allowing for rapid assembly of new actuators on demand that suit each project by varying the incorporated components, as well as permitting for more-rapid servicing when necessary. Additionally, the instrumentation for the actuator is contained within the actuator frame, better protecting the instrumentation from damage such as from being struck. The actuator includes a new manual engagement system, providing for better engagement of manual controls to actuate the actuator and the accompanying valve when necessary.

A limit switch assembly, for a rising-stem valve having a stem with a diameter and a groove marking a desired stem position, includes an actuator arm having an inner end and an outer end. The inner end of the actuator arm forms a follower. A radius washer is mounted to the outer end of the actuator arm. An electrical switch has an operating lever and is mounted adjacent to the outer end of the actuating arm such that when the actuator arm is in an outward position the radius washer moves the operating lever, operating the electrical switch. When the actuator arm is in an inward position the radius washer does not move the operating lever and the electrical switch is not operated. A bias spring biases the actuating arm toward the inward position.

A limit switch assembly, for a rising-stem valve having a stem with a diameter and a groove marking a desired stem position, includes an actuator arm having an inner end and an outer end. The inner end of the actuator arm forms a follower. A radius washer is mounted to the outer end of the actuator arm. An electrical switch has an operating lever and is mounted adjacent to the outer end of the actuating arm such that when the actuator arm is in an outward position the radius washer moves the operating lever, operating the electrical switch. When the actuator arm is in an inward position the radius washer does not move the operating lever and the electrical switch is not operated. A bias spring biases the actuating arm toward the inward position.

High pressure loop exhaust gas circulation is achieved in an exhaust system (10) of an engine (12) by providing an adjustable valve (100) in an exhaust passage (18) of the engine (12). The valve (100) is configured to control fluid flow through the passage (18) and generate pressure to drive the high pressure exhaust gas recirculation. The valve (100) includes a valve inner surface (110) that has a curvilinear profile when viewed in longitudinal cross section. An actuator (140) is connected to the valve (100), and is configured to move the valve (100) relative to the exhaust passage (18) so as to control exhaust gas pressure within the exhaust passage (18). In some embodiments, a pilot tube (280) is used in combination with the valve (100) to generate high pressure exhaust gas recirculation at the engine (12) intake.

High pressure loop exhaust gas circulation is achieved in an exhaust system (10) of an engine (12) by providing an adjustable valve (100) in an exhaust passage (18) of the engine (12). The valve (100) is configured to control fluid flow through the passage (18) and generate pressure to drive the high pressure exhaust gas recirculation. The valve (100) includes a valve inner surface (110) that has a curvilinear profile when viewed in longitudinal cross section. An actuator (140) is connected to the valve (100), and is configured to move the valve (100) relative to the exhaust passage (18) so as to control exhaust gas pressure within the exhaust passage (18). In some embodiments, a pilot tube (280) is used in combination with the valve (100) to generate high pressure exhaust gas recirculation at the engine (12) intake.

A fully-dense, fluid tight, low friction coating system is described that is characterized by fluid impermeability and a reduced coefficient of friction. The coating system includes a fully dense, fluid tight underlying layer; and a low friction layer. Unlike conventional materials requiring a sealant, the coating systems of the present invention achieves better fluid tightness and maintains said fluid tightness along one or more sealing surfaces at higher service temperatures and service pressures than previously attainable. The constituents of the fully-dense, fluid tight, low friction coating system are physically and chemically compatible so as to not adversely impact lubricity, wear resistance and corrosion resistance during the service life of a component coated with the fully-dense, fluid tight, low friction coating system.