A valve (1) for supplying fuel gas to a gas appliance comprises a valve housing (2) having a valve chamber (3) extending therethrough. Fuel gas is supplied through an inlet port (5) to the valve chamber (3) and from main and secondary outlet ports (6,7) to a burner and a pilot light jet, respectively, of the gas appliance. A primary valving member (35) and a secondary valving member (36) co-operate with a primary valve seat (15) and a secondary valve seat (20), respectively, for isolating the ma...

A valve (19) primarily designed as a float valve to control the flow of water under pressure into a cistern has an upstream chamber (22) and a downstream chamber (23). The upstream chamber (22) communicates an inlet (21) for mains water supply with outlets (17, 17A) and the downstream chamber (23) has an outlet (24) which is closed by a valve (25) when a float rises a float rod (14). A primary valve member assembly comprises a piston (3) to the downstream end of which a diaphragm (5) is attached...

The invention relates to a valve (21) for a fluid or gaseous medium, with a displaceable valve body (8), by means of which the clear flow cross-section is adjustable. The valve (21), viewed in the direction of flow, comprises a pressure sensor (1) up- or down-stream of the valve body (8), to record the pressure of the medium and the valve body (8) is controlled depending on a signal from the pressure sensor (1) and/or an external controller (2).

A valve for controlling flow of fluid through an aperture in a barrier comprises a valve body including a pin and having a continuous sealing surface surrounding at least one opening through the valve body, and a diaphragm of resilient material. The diaphragm has an opening surrounded by an inner margin and is disposed with the pin extending through the opening and with a main surface presented towards the continuous sealing surface of the valve body. The inner margin of the diaphragm is in a st...

A valve particularly intended to act as a water key for a musical wind instrument comprises a ball 17 captively mounted inside a housing 15 and a spring 18 which biases the ball 17 into an inlet aperture 12 of the valve. An annular actuator 20 extends around the housing 15 and comprises a plurality of projections 21 which extend radially inwardly through the housing 15, the inner ends of the projections 21 surrounding the ball 17. In use, when the actuator 20 is pushed in any radial direction, t...

There is provided a valve enabling complete prevention of leakage and a backflow and having durability and less noise, and further there may be implemented a valve capable of predicting the tendency of occurrence of damage on the functions of the valve before the functions of the valve are actually damaged. In a valve having a valve chamber 5 formed between a fluid inlet 2 and a fluid outlet 3, a valve element 6 disposed in the valve chamber 5 is composed of an elastic member and an inelastic me...

A valve, such as a liquid level sight glass gage valve, has a valve unit and a passageway that extends through the valve unit. The passageway has a stem receiving area, a seal receiving area, and a bonnet receiving area that has a non-circular inner perimeter. A packing assembly is provided to isolate the bonnet receiving area from the fluid path. A bonnet is located within the bonnet receiving areas and has a non-circular outside surface for mating relationship with the non-circular inner perim...

A valve which intended to control the flow of a fluid, for example a gas, comprises a valve body (50), an internal member for opening and shutting-off the passage of the gases, an operating handwheel (56) connected to the opening and shut-off member, and means limiting movement of the operating handwheel (56) and of the opening and shut-off member in the direction of opening of the valve. To avoid the valve jamming in the open position, said means limiting the movement of the operating member in...

The valve comprises an operating wheel connected by a connecting rod to an opening and closing member. The valve is sealed by a stuffening box fixed into the upper part of the body around the rod. The stuffening box has a polygonal head so that it can be screwed and unscrewed. However the head is not accessible using a conventional spanner so as to prevent a non-specialist form slackening of the stuffing box and avoid him risking an accident.

A valve for regulating a gas or liquid has a valve housing with an inlet and an outlet. A valve seat is arranged in the valve housing and connects the inlet to the outlet via a valve opening. A valve body facing the valve seat is formed by a band attached at a first fixation point and a second fixation point. The first fixation point is at one end of a lever. An actuator is arranged on the other end of the lever to act on the lever so the distance between the first fixation point and the second ...