In order to accurately judge whether or not there is a seat leakage in the first valve and the second valve in a short period of time, a fluid control apparatus comprises a fluid resistor arranged in a flow channel, a first valve arranged upstream of the fluid resistor, a first pressure sensor that measures a pressure in a first volume between the first valve and the fluid resistor in the flow channel, a second valve arranged downstream of the fluid resistor, a second pressure sensor that measures a pressure in a second volume between the fluid resistor and the second valve, a valve controller that controls the first or second valve, and a seat leakage judging part that judges whether or not there is a seat leakage in the valve valves based on the pressure sensors in a state where the valves are fully closed.

A valve having a flow trim assembly that can be quickly and efficiently removed and repaired or replaced. A body section having a central through bore that defines an inlet, an inner chamber or space, and two selectable outlets. Further the selectable outlets can direct flow in either a 90 degree “angle” orientation or at straight “in-line” orientation. An actuator stem extends into the inner chamber. A first (movable) trim member is attached to the rotator, and can be selectively rotated relative to a second (fixed) trim member. The first and second trim members cooperate to adjust flow opening through the valve. A valve bonnet that allows direct coupling of an actuator to the valve.

A gas safety valve for controlling a gas flow includes a valve body providing a body inlet port for coupling to a first gas supply and a body outlet port for coupling to an appliance, the valve body extending along a longitudinal axis between the body inlet port and the body outlet port, the valve body further providing an inlet bore extending downstream from the body inlet port, and an outlet bore extending to the body outlet port. A valve has a valve chamber having a valve inlet and a valve outlet, a ball located within the valve chamber and a valve seat provided at the valve outlet such that the ball is retained in the valve chamber upstream of the valve seat. The valve body includes an internal junction positioned upstream of the valve inlet, and a side inlet port.

A shut-off device for a fluid includes a housing conducting the fluid, an inflow opening provided in the housing, an outflow opening provided in the housing, a flow channel formed in the housing between the inflow opening and the outflow opening, and a blocking device arranged in the flow channel. The blocking device has a blocking body receptacle and a blocking body movable in the blocking body receptacle. The flow cross-section for the fluid in the blocking device, and thus in the flow channel, can be changed by moving the blocking body in the blocking body receptacle. A reliable detection of the position of the blocking body is ensured in that an ultrasonic measuring device is arranged in or aligned on the housing such that the position of the blocking body can be determined by means of the ultrasonic measuring device.

Dishwashing appliances and methods, as provided herein, may include features or steps such as measuring a first pressure in a sump with a pressure sensor and storing the first pressure in a memory of the dishwashing appliance as a reference pressure. Dishwashing appliances and methods may further include features or steps for measuring a second pressure within the sump with the pressure sensor after measuring the first pressure, and determining that a check valve is failed when the second pressure exceeds the first pressure by at least a predetermined margin.

A pressure safety valve (PSV) indicator arranged to be secured to a PSV discharge pipe over a first through-bore arranged therein, the PSV indicator including a connection including a first radially inward facing surface, an indicator cylinder, including a radially outward facing surface, a first end connected to the connection, a second end, and a second radially inward facing surface extending from the first end to the second end, a plunger slidably arranged in the indicator cylinder, the plunger including a head, and a neck having a third end, and an inductive proximity sensor operatively arranged to determine the position of the plunger.

Device(s) and techniques determine if a gas regulator supplying gas at a regulated pressure to a gas meter (e.g., the gas meter of a house or business) within a gas distribution system has one or more lock-up failure events or venting events, wherein gas is vented to the atmosphere. In an example, a sensor obtains information indicating a relative position of a stop stem of a gas regulator and a diaphragm pin of the gas regulator. As pressure increases within the regulator, the diaphragm pin moves toward and/or touches the stop stem. The gas pressure increase may result from debris in the regulator that prevents a valve from fully closing. A signal may be sent from the regulator and/or associated gas meter. The signal may contain information based at least in part on data from the sensor, and which may indicate a lock-up failure event or a venting event by the gas regulator.

The present invention relates to an axial valve with a modular concept for the regulation of fluid flow and prevention of fluid reverse flow consisting of a single-piece and two-piece outer valve body (1; 99) that can be installed within the pipeline, the outer valve body (1; 99) of which contains a coaxially situated inlet and outlet fluid flow opening; a central valve body (2) which is connected to the outer valve body (1; 99) by means of a plurality of ribs (1.1), wherein a channels (7) are situated between the outer valve body (1; 99) and the central valve body (2), and said channels allow for an undisturbed flow of the flow fluid when said axial valve is open; an actuator (4a; 4-b; 4c; 4-SC; 4-SH; 4-SFMO) located axially within the central valve body (2; 100), the actuator of which contains an actuator piston (5-a; 5-b; 5-c; 90; 112; 106-SH) and an actuator piston rod (5.1-a; 5.1-b; 5.1-c; 86.1-a; 106.1-SH) to which a regulating piston (6-a; 80) is connected, and with an axial movement of which the flow of the fluid in a pipeline or a disc (104) for the prevention of fluid reverse flow is controlled. The axial valve further comprises a sealing system of the actuator piston rod (5.1-a; 5.1-b; 5.1-c; 86.1-a; 106-.1-SH) and a sealing control mechanism for the same; and a sensor mechanism for signalling a position of the regulating piston (6-a; 80) and the disc (104) of the check valve. The actuator, according to the present invention, may either be a hydraulic actuator (4a; 4-SH) or a mechanical actuator (4-b) or a pneumo-hydraulic actuator (4-c) or a pneumatic actuator (4-c; 4-SH; 4-SFMO), and the sensor mechanism may be either an internal sensor mechanism housed within any of the said actuators or an external sensor mechanism located outside of any of the said actuators, wherein any of the said actuators and said sensor mechanisms are modular and mutually complementary in such a way that they can be combined. The axial valve is a flow control valve or a check valve.

A pilot actuator for controlling the operation of a control valve. The control valve can be part of a thy-type fire suppression sprinkler system in which the sprinkler piping network is filled with pressurized gas such as, for example, air, nitrogen, or another gas. The pilot actuator is a differential valve that actuates the control valve when the gas pressure in the sprinkler piping network is at or below a value for tripping or actuating the pilot valve to the open position. The actuator assembly defines a neutral chamber that is at an intermediate pressure in comparison to pressures at the inlet port and the measuring port when the pilot actuator is in a stand-by state.

The present invention discloses a valve structure with a built-in valve seat of a pre-action warning valve, including: a valve body, a valve cap, a valve seat, and a membrane clack. The pre-action warning valve provided in the present invention has the advantages of being simple, reliable, and low in manufacturing costs.