A check valve includes an upper housing defining an inlet of the check valve, and a lower housing having a seating portion and defining an outlet of the check valve. The check valve further includes a chamber interposed between and defined by the upper and lower housings for fluidly connecting the inlet and the outlet, and a flexible diaphragm mounted in the chamber. The flexible diaphragm selectively permits fluid flow in a first direction, and prevents fluid backflow in a second direction opposite to the first direction. The flexible diaphragm includes a color changing material, and when the flexible diaphragm is seated on the seating portion and bent due to force of the fluid flowing in the first direction, the flexible diaphragm exhibits a color change.

A sight glass column is described. The sight glass column is configured to be indirectly attachable to a machine via a machine connector such that machine fluid is transferable from the machine to the sight glass column. The sight glass column further has a remote sensing port, and a lockable oil level ring.

A position detection assembly for detecting a spatial position of a moveable element. The assembly includes a colour sensor and one or more colour indicators provided on a surface of the moveable element. The colour sensor is spaced from the surface of the moveable element and arranged to emit light onto the surface and detect light reflected from the surface and to determine the position of the element based on the reflected light.

An integral valve arrangement may comprise a housing. The housing may comprise a main valve and a relief valve. The main valve may comprise an inlet and a first outlet. The relief valve may comprise a relief inlet in a side wall of the inlet, a relief outlet in a side wall of the first outlet, and a pressure relief system. The inlet and the first outlet may be substantially axially perpendicular. The relief inlet and the relief outlet may be substantially axially perpendicular. The pressure relief system may comprise a body abutting walls of the housing, a relief member disposed within the body, and a lever. The relief member may comprise an interior end and an exterior end. The lever may be rotatably coupled to the exterior end of the relief member by a connecting mechanism.

An airflow valve may comprise a plate assembly located inside an airflow conduit. An actuator may attached to, and/or otherwise fixed relative to, a plate of the plate assembly. The actuator may be coupled to the airflow conduit. If activated, the actuator may react against the airflow conduit to induce rotation of the plate.

A safety opening/closing valve for easy checking of an opened/closed state thereof includes: a ball valve part having a rotating shaft part configured to open and close a flow path of the ball valve part by rotating; a housing part having an upper surface and having a plurality of gear teeth vertically formed along the inner circumference of an inner space of the housing part; a rotating part arranged in the housing part such that the rotating part rotates relative to the central axis of the housing part; at least three satellite gear parts mounted rotatably to the upper portion of the rotating part while being in engagement with gear teeth formed at the inner circumference of the housing part; a driving part including a sun gear part provided as a bar shape and inserted through an open central area of a top surface of the housing part.

A seat leak measurement system for a ball valve is described. The system includes: a ball valve with a cavity drain line, the ball valve including a cavity pressure sensor; a valve seat leak measurement apparatus including: a cable with a connector, the connector having an external grounding cable; an apparatus electronic control system in communication with the valve sensor retrieval fitting and with valves of the valve seat; an fluid inlet line with a quick pipe coupler, the fluid inlet line having an apparatus drain valve and an isolation valve; a pressure indicator transmitter connected to the fluid inlet line, the pressure indicator transmitter in electronic communication with the apparatus electronic control system; a temperature indicator transmitter connected to the fluid inlet line, the temperature indicator transmitter in electronic communication with the apparatus electronic control system; and a flow elements manifold receiving fluid from the fluid inlet line.

An adjustable flow valve, comprising: a body; an upstream port; a downstream port; a body; a side plate; a restricting paddle within the body that pivots into a flow path from the upstream port to the downstream port; a screw coupled with the restricting paddle and configured to swing the restricting paddle from a hinged point across the flow path; and wherein the side plate has an opening that exposes an edge of the restricting paddle and graduations that illustrate a plurality of flow percentage.

A check valve includes an upper housing defining an inlet of the check valve, and a lower housing having a seating portion and defining an outlet of the check valve. The check valve further includes a chamber interposed between and defined by the upper and lower housings for fluidly connecting the inlet and the outlet, and a flexible diaphragm mounted in the chamber. The flexible diaphragm selectively permits fluid flow in a first direction, and prevents fluid backflow in a second direction opposite to the first direction. The flexible diaphragm includes a color changing material, and when the flexible diaphragm is seated on the seating portion and bent due to force of the fluid flowing in the first direction, the flexible diaphragm exhibits a color change.

A hydraulic component includes a camera integrated such that the camera observes at least one surface that is prone to wear and/or at least one edge that is prone to wear to make a statement about wear relating to the at least one surface and/or the at least one edge.