A valve device capable of automatically and surely performing such an opening and closing control that, when gas is forced to be passed after liquid is passed, a pipeline is cut out, providing excellent sealability at the time of valve closing and stable operation, and making difficult for a chattering, hunching, or water hammer to occur immediately before valve closing or the moment the valve starts to open, and automatically exhausting the residual gas inside the pipeline at the time of start of or during the feeding of the liquid; and a pipeline system capable of being controlled automatically by the use of the valve device; the valve device, characterized by comprising a valve having a valve disc interlocked with a float opening when the float rises and closing when the float lowers and an auxiliary valve closed when an acting force of a specified value or higher caused by a pressure inside a flow path is added thereto and opened when the added force is removed, the pipeline system, characterized in that the valve device is installed at the inlet of a terminal device in the pipeline system allowing the residual liquid inside the pipeline to be drained by the force-feeding of the gas into the pipeline after the liquid is fed to at least one terminal device through the pipeline

Valve device and pipeline system

A modified vacuum actuated valve assembly and sealing mechanism is provided for improved sub-atmospheric flow stability characterized by the absence of delivery pressure spikes and flow excursions. The valve assembly includes a non-stationary thermoplastic seat and a stabber. The stabber is characterized by a top portion having a circular periphery designed to mechanically engage and disengage with an inner sealing surface of the thermoplastic seat. The sealing surface is coined to eliminate surface irregularities contained therein, thereby producing a relatively smooth coined mating inner sealing surface for the circular top portion of the stabber. The valve assembly also includes a modified bellows capable of fine tuning the delivery pressure of the valve assembly.

Modified vacuum actuated valve assembly and sealing mechanism for improved flow stability for fluids sub-atmospherically dispensed from storage and delivery systems

PURPOSE:To shorten the processing time of the system, by making the priority of the access from a direct access equipment higher than that of the access from CPU and by deciding the reception order in the order of ports of a common memory unit as to the access among a plural number of CPUs.

Multiplex data processor

A rotary valve having a valve element rotating around the center of rotation thereof, and a stator provided adjacently to the valve element, and formed so that the torque occurring due to flow power working on the valve element can be reduced, wherein a fluid passing opening is provided in both of the valve element and stator, or in the stator alone, the valve element being rotated with the opened area of the opening varied to control a flow rate of the fluid, the shape of a curve of an edge of the opening being designed so as to reduce the torque occurring due to the flow power which is exerted by the fluid passing through the opening on the valve element.

New fluid rotary valve of low sensitivity with respect to flow power

Drive apparatus of sewing machine

Low noise valve

PURPOSE:To reduce the generation of noise, by attaining a reduction of pressure with a working mechanism that applies a working pressure to a bellows with the dynamic pressure of a fluid itself and giving a balance to the bellows so that it keep an opening appropriate to a flow. CONSTITUTION:A bellows 4 is provided at a port part to extend from a fixed end 10' and then presses with a free control the gap between the port part and a sheet part. when a working pressure having a relation of P1>P2>P3 is applied to the bellows 4, a downward force to press the port part down by the pressure P2 is applied to a pilot governor secondary room 19 through a tube 22. And a balance is obtained at a certain position between the push-up force and the push-down force. Both the balancing position and the working pressure P2 are decided by the primary side pressure P1 and the secondary side pressure P3 plus the flow rate of gas which flows at that moment. When the pressure P3 is higher than the set value, the pressure P2 becomes high to increase the force that pressed the port part down via the function of a pilot valve with which a part of the fluid works in division.

Nishikawa Kouzou

Papers

Low noise valve

Low-noise pressure reducing valve

Liquid level detector