Abstract: A gas flow regulation module for use in a pressure vessel including a wall with an opening having a minimum opening diameter. The wall defines an interior space in the pressure vessel. The module includes a head portion, a neck portion, and a body portion. The body portion has a maximum diameter which is less than the minimum opening diameter, so that the body portion fits through the opening for positioning in the interior space. The gas flow regulation module includes a manual shut-off valve for controlling the flow of fluid through the module.

Abstract: A pressure regulator having a valve cartridge adapted to be removably held within its housing, said cartridge having a frame carrying and positioning a valve seat, a valve member, a valve stem, and a spring. The valve cartridge ensures correct spacing between the valve member and the valve seat. Difficulties in pressure regulation may be quickly rectified and pressure flow characteristics may be altered by removing and replacing the valve cartridge. Another aspect of the invention discloses a multiple pressure regulator comprising: a housing adapted to removably house two valve cartridges; an inlet opening into the housing; an outlet opening from the housing; and two valve cartridges adapted to be removably held within the housing. Each of said cartridges similar to those described above.

Abstract: A hand-held power tool for use in hand working operations including a hand pressure sensing element for adjusting the power of the tool. More specifically, the invention provides a hand engraving power tool that is activated from absence of power to much greater power or anywhere in between determined by the amount of pressure exerted by a human hand on the tool's handle.

Abstract: During the pumping of corrosive gases, it is advantageous to admit a seal gas to endangered pumping chambers at a lower flow rate and a higher pressure than the corrosive gases. Inert gas from a supply (3) has its pressure reduced by a pressure reducer (6). An on/off valve (7) controls a flow of the inert gas through a flow restriction (8) which restricts the flow of inert gas to appropriate sealing gas rates at an outlet (4). After pumping the corrosive gas, a control valve (12) in a bypass line (11) causes the inert gas to be supplied to the outlet (4) at a higher flow rate for purging the pump.

Abstract: Pressure reducer for compressed gases, comprising at least one regulation stage constituted by a chamber divided by a first membrane (25) into two chambers (23, 24), one of which said chambers (24) is maintained at a reference pressure and the other (23) at a pressure which depends on the gas pressure in the outlet pipe (3), an opening, closed by a membrane (43) integral with a cap (42), located between the said chamber (24) at the reference pressure and the said gas outlet pipe (3), a gas inlet chamber (10) with an opening (11) which leads to the said outlet pipe (3) in correspondence with the said cap (42), the movements of which said cap open and close the passage (11) between the said inlet chamber (10) and the said outlet pipe (3), and means (41) integral with the said first membrane (25) which act on the said cap (42) so that it approaches and retracts from opening (11) of the said gas inlet chamber.

Abstract: A poultry drinker system includes a number of drinker runs each including a selector valve, a drinker line control valve and a drinker line having a plurality of drinkers. The selector valve applies to the corresponding drinker line control valve either an intermediate control pressure or a relatively high inlet pressure. Control pressure is derived from inlet pressure by an adjustable pressure reducing controller. In the absence of control pressure, a low pressure is applied to the drinker line control valves. Each drinker line control valve includes a proportional relay valve that is closed when low pressure is applied to the drinker line control valve and is open when intermediate pressure is applied to the drinker line control valve. When open, the proportional relay valve supplies to the corresponding drinker line a low pressure outlet flow proportional to control pressure.

Abstract: A regulator for regulating outlet pressure of a fluid contained in a tank includes first and second pistons. The first piston is biased in a first direction and is movable against the bias when exposed to pressure in the tank. The second piston is biased in a second direction away from an end of the first piston, and the second piston is movable against the bias when exposed to the outlet pressure. The ends of the first and second pistons are separated by a first distance to allow the fluid to flow out of the tank, and the ends of the first and second pistons are positioned closer together than the first distance to inhibit flow out of the tank when the outlet pressure reaches a threshold.

Abstract: A gas pressure-reducing valve in which a valve member to be seated on a valve seat having a valve hole opened at its central portion and leading to a pressure-reducing chamber between a body and a diaphragm is fixed on a valve stem connected to the central portion of the diaphragm and arranged coaxially with the valve axis. A bottomed mounting bore which is aligned with the valve axis and opened toward the pressure-reducing chamber is formed in the body. A cylindrical valve seat member forming a valve chamber between itself and the closed end of the mounting bore for accommodating the valve member and inserted into the mounting bore is fixed on the body. A valve seat facing the valve chamber is formed on the inner surface of the end portion of the valve seat member on the side of the pressure-reducing chamber. This arrangement makes it possible to reduce the number of parts and to enhance the degree of freedom for the arrangement of the parts in the body.

Abstract: A pilot-operated, pressure-loaded, movable diaphragm-type gas-flow regulator valve is shown which is used in flow control applications. A regulator body internal port arrangement interconnects two independent throttling mechanisms in series. Two throttle plates are located within the regulator valve body relative to an inlet chamber and an outlet chamber. A movable diaphragm is positioned relative to a throttle plate by a separate pilot control system to vary the area of throttle plate exposed to flow, and thus, the flow rate of the regulator valve. The throttle plates each have drilled flow apertures which control flow through the valve. Smaller flow apertures are opened before larger flow apertures as the valve diaphragm lifts, thereby ensuring stability at low-flow conditions, while providing high capacity at maximum diaphragm lift.