摘要:
A system of the invention for supervising piping work comprises a machine for performing piping work such as welding of pipes or tightening of pipe joints under predetermined conditions, check means for checking whether the piping work has been executed properly based on predetermined values of piping work conditions and actual piping work data, a host computer for accumulating the predetermined values of piping work conditions, the actual piping work data and the result of checking, and communication means for transmitting the predetermined values of piping work conditions, the actual piping work data and the result of checking.
摘要:
A mixed gas supply device includes a plurality of gas supply lines arranged in parallel that include flow rate control devices and outlet side switching valves, wherein gas outlets of respective outlet side switching valves communicate with a manifold, and another gas supply line at a position close to a mixed gas outlet of the manifold supplies a low flow rate gas, wherein an outlet side of the flow rate control device and an inlet side of the outlet side switching valve are hermetically connected via an outlet side connecting fitting of the flow rate control device and a mounting table having a gas passage, wherein a small hole portion is provided at a part of a flow passage at the outlet side connecting fitting and/or a flow passage, which makes the outlet side switching valve and a mixed gas flow passage in the manifold communicate with one another.
摘要:
To provide an opening degree detection device for an automatically operated valve which is easily assembled into an automatically operated valve, makes it easy to ensure detection accuracy at the time of assembling the opening degree detection device, and is easily applicable to an existing automatically operated valve. The opening degree detection device includes: a base plate 4 which is detachably mounted on an automatically operated valve 2; a displacement sensor 5; and a target 6 having an inclined detection surface 6a which is detected by the displacement sensor 5. The target 6 is fixed to the base plate 4. The displacement sensor 5 is supported on a valve stem 14 by way of a sensor support member 21, and the sensor support member 21 is supported on the base plate 4 by way of a guide means.
摘要:
A pressure control valve piezoelectric element driving circuit is provided for a pressure type flow rate control device provided with a flow rate self-diagnosis function for comparing initial pressure drop characteristics data measured and with pressure drop characteristics data in a flow rate diagnosis which are measured under conditions that are the same for both measurements to detect malfunction in flow rate control from a difference between both characteristics data, wherein a first discharge circuit slowly discharges a piezoelectric element driving voltage applied to the piezoelectric element according to a step-down command signal from a CPU, through a step-down command circuit to step down the voltage, and a second discharge circuit that rapidly discharges a piezoelectric element driving voltage applied to the piezoelectric element according to a high-speed step-down command signal from the CPU, through a high-speed step-down command circuit to step down the voltage.
摘要:
A piezoelectrically driven valve and a piezoelectrically driven fluid control device are provided that may control a fluid even if the temperature of the fluid is higher than an operating temperature range of a piezoelectric actuator. The piezoelectrically driven valve includes a valve element for opening and closing a fluid passage, a piezoelectric actuator for driving the valve element by utilizing extension of a piezoelectric element, and a radiation spacer that lifts and supports the piezoelectric actuator away from the fluid passage, and radiates heat that is transferred from fluid flowing in the fluid passage to the piezoelectric actuator, and preferably further includes a support cylinder that houses and supports both of the piezoelectric actuator and the radiation spacer, wherein the support cylinder is made of a material with the same thermal expansion coefficient as that of the radiation spacer, at least at a portion for housing the radiation spacer.
摘要:
The present invention provides a corrosion-resistant metal made sensor for fluid and a fluid supply device for which the sensor is employed.More specifically, the corrosion-resistant metal made sensor for fluid is equipped with a corrosion-resistant metal substrate, a mass flow rate sensor part comprising a corrosion resistant metal substrate, a thin film forming a temperature sensor and a heater mounted on the back face side of the fluid contacting surface of the corrosion-resistant metal substrate, and a pressure sensor part comprising a thin film forming a strain sensor element mounted on the back face side of the fluid contacting surface of the corrosion-resistant metal substrate, and the sensor is so constituted that the mass flow rate and pressure of the fluid are measured.
摘要:
An evaporation supply apparatus for raw material used in semiconductor manufacturing includes a source tank in which a raw material is pooled; a flow rate control device that supplies carrier gas at a regulated flow rate into the source tank; a primary piping path for feeding mixed gas G0, made up of raw material vapor G4 and carrier gas G1, an automatic pressure regulating device that regulates a control valve based on the detected values of the pressure and temperature of mixed gas G0 to regulate the cross-sectional area of the passage through which the mixed gas G0 is distributed so as to hold the pressure of the mixed gas G0 inside the source tank constant; and a constant-temperature heating unit for heating the source tank to a set temperature, in which mixed gas G0 is supplied to a process chamber while controlling the pressure inside the source tank.
摘要:
The invention prevents overshoot from occurring in flow rate on the output side of a flow rate regulator when output flow rate is changed or the gas type distributed is changed. Thus, an automatic pressure regulator is provided to supply gas pressure to a flow rate regulator that includes a piezoelectric element driving type pressure regulating valve, a control pressure detector provided on the output side of the pressure regulating valve, and a controller to which a detected value P2 of the control pressure detector and a set value Pst for control pressure are input, wherein the controller supplies a control signal to a piezoelectric element driving unit of the pressure regulating valve using a proportional control system to perform valve opening regulation in which the proportional control system of the controller is set to control to bring about a residual deviation in control pressure by disabling an integral action.
摘要:
With a pressure type flow control apparatus, a valve on the downstream side of a throttle mechanism is released and a flow rate setting value Qe inputted to the pressure type flow control apparatus is changed to detect the magnitude ΔV of change of a flow rate output signal Qo from the pressure type flow control apparatus while the flow rate setting value Qe is changed, so that normal functioning of the releasing operations of the valve on the downstream side of the throttle mechanism is confirmed when the magnitude ΔV of change of the flow rate output signal Qo is above the predetermined value. If the releasing operations are malfunctioning, the magnitude ΔV of changes is found to be below the predetermined value.
摘要:
In a step motor driven cam valve a stem freely ascends and descends within a body having an in-flow passage, an out-flow passage, a valve chamber, and a valve seat. The stem is descended by an actuator, composed of a step motor and a cam mechanism located at a position above the stem, that changes a rotational motion of the step motor to a linear motion and transmits the linear motion to the stem. A diaphragm within a valve chamber or a valve body at a lower end part of the stem rests on the valve seat. A lift support mechanism that supports the actuator to freely ascend and descend is arranged at a bonnet that covers the valve chamber. A height fine-adjustment mechanism, arranged at the lift supporting mechanism, finely adjusts the height of the actuator relative to the stem so as to perform zero-point adjustment of the valve.