摘要:
A fluid controller, wherein tape heaters (11) are disposed on both sides of lines (A) and (B), a plurality of clearances for storing tape heater holding clips (13) are provided between fluid control devices adjacent to each other in the lines (A) and (B), the tape heaters (11) are held in the lines (A) and (B) by the clips (13) holding the tape heaters from both sides thereof, the lines (A) and (B) with heater are installed on line support members (10) detachably installed on a base member (1), and heater insert holes (14) extending in longitudinal direction are provided in the line support member (10) and sheath heaters (12) are inserted into the holes (14).
摘要:
A vacuum heat insulation valve that can be used in high-temperature conditions in a gas supply system and gas discharge system and that can be drastically reduced in size and made compact because of excellent heat insulating performance of the valve. A vacuum heat insulation valve constructed from a valve that has a valve body and an actuator and from a vacuum insulation box that receives the valve. The vacuum heat insulation box (S) is constructed from a rectangular lower vacuum jacket (S5) that has on its side face a tubular vacuum insulation piping receiving section (J) and whose upper face is opened, and from a rectangular upper vacuum jacket (S4) that is air-tightly fitted to the lower vacuum jacket (S5) from the above and whose lower face is opened.
摘要:
A controller, comprising a power boosting means (5) having a tapered member (41) extending from the lower end of an operating shaft (3) downward, a disk-like member (42) provided at the upper end of a valve stem (16), and front and rear swing bodies (43, 44) disposed between the both members (41, 42) through the tapered member (41) so as to be opposed to each other and rotatable around swing shafts (45, 46), the swing bodies (43, 44) further comprising plate-like bodies (43a, 44a), upper contact faces (43b, 44b) formed on the upper parts of the bodies and allowed to abut on the tapered face of the tapered member (41), and lower contact faces (43c, 44c) formed on the lower parts of the bodies and allowed to abut on the upper face of the disk-like member (42), wherein the lower contact faces (43c, 44c) of the swing bodies are formed in the cam faces of arc shapes having their centers at center axes positioned eccentric from the axes of the swing shafts (45, 46).
摘要:
A diaphragm valve for a vacuum evacuation system applicable to a semiconductor manufacturing system. Corrosion of members due to deposition/adhesion of products produced by thermolysis of gas, clogging due to products, and seat leakage are prevented. This diaphragm valve leads to reduction in the scale of the vacuum evacuation system facility, reduction in cost, and reduction in diameter of piping of the vacuum evacuation system for the purpose of decrease in vacuum evacuation time. Specifically, the diaphragm valve (1) comprises a body (2) having an inlet passage (6), an outlet passage (7), and a valve seat (8) provided between the passages, a diaphragm (3) which is provided to the body (2) and can be separated from the valve seat (8) and brought into contact with the same, and drive means (4) provided to the body (2) and adapted to separate the diaphragm (3) from the valve seat (8) and to bring the diaphragm (3) into contact with the same. The portion (25) of the body (2) and the portion (25) of the diaphragm (3) both coming into contact with a fluid are coated with a synthetic resin coating (5) of predetermined thickness.
摘要:
A dewatering method for gas supply systems which is adapted for effective removal of adsorbed water by ordinary-temperature exhaust processing without using the baking method. The dewatering method for gas supply systems which remove water remaining inside a gas supply system by passing a dewatering gas through the gas supply system, characterized in that the dewatering gas flow pressure is set at values which are above a minimum pressure at which the gas flow becomes a viscous flow but which are below the saturated vapor pressure of water at the dewatering gas flow temperature. The condition under which the dewatering gas becomes a viscous flow is determined by the mean free path of gas molecules becoming smaller than the diameter of the piping for the gas supply system. If the dewatering gas is exhausted at ordinary temperature under such condition, the adsorbed water on the inner surface of the piping or in the valve filter can be effectively removed.
摘要:
A gas supply equipment comprising a gas control valve (2), an orifice accommodating valve (9) provided downstream of the control valve (2), a pressure detector (3) provided between the control valve (2) and the orifice accommodating valve (9), an orifice (5) provided downstream of the valve mechanism of the orifice accommodating (9) and an arithmetic and control unit which calculates a flow rate as Qc = KP1 (K; constant) from a detected pressure P1 by the pressure detector (3) and outputs to the drive unit of the control valve (2) the difference between a flow rate instruction signal Qs and a calculated flow rate Qc as a control signal Qy.
摘要:
An orifice for use in pressure type flow rate control unit which can be manufactured easily and inexpensively, and which has a linear relationship between pressure P1 upstream of the orifice and the flow rate over a wide range of pressure ratio P2/P1 (where P1 is the pressure upstream of the orifice and P2 is the pressure downstream of same), with the flow rate characteristic relationship among a plurality of orifices being easily adjustable. More specifically, the orifice has a structure comprising a tapered inlet section (1) wherein one open end of a bottom hole (6) bored into a main body member (D) is cut into a shape like the mouthpiece of a trumpet, and a short drawn parallel part (2) continuing therefrom; and a short expanded tapered section (3) formed by expanding the diameter of the other open end of the bottom hole (6) and continuing from the drawn parallel part (2), and an expanded parallel part (4) continuing therefrom.
摘要:
An orifice plugging sensor for a flow-rate controller having an orifice, comprising a memory (M) in which is stored reference pressure decrease data Y(t) about the upstream-side pressure P1 measured when the flow rate is changed from a high preset flow rate QSH to a low preset flow rate QSL under the condition that an orifice (2) does not plug, a pressure sensor (14) for measuring pressure decrease data P(t) about the upstream-side pressure P1 measured when the flow rate is changed from the high preset flow rate QSH to the low preset flow rate QSL under the condition that the orifice is in an actual state, a central processing unit (CPU) for comparison operation of the pressure decrease data P(t) and the reference pressure decrease data Y(t), and an alarm circuit (46) for giving an alarm of a plugging when the pressure decrease data P(t) differs from the reference pressure decrease data by a predetermined degree.
摘要:
A fluid control device 71 includes a working member 75 in automatic opening and closing, which is moved vertically by introduction or discharge of compressed fluid to or from a compressed fluid inlet chamber 90 formed in a casing 73 to move a valve element holder 5 to an opening position against bias force of a compression coil spring 77, and an working member 74 in manual opening and closing, which is moved vertically by a manual operation and directly presses the valve element holder 5 downward when it is moved downward.
摘要:
A projection (7) of a gasket (4) has a trapezoidal shape defined by an inwardly facing inclined face (7a) as an outer periphery, an outwardly facing inclined face (7b) as an inner periphery, and a flat face (7c) as a tip face. The hardness of the gasket (4), the angle formed by the inclined faces (7a, 7b) of the projection (7), the height of the projection, and the area of the flat face (7c) of the projection tip are set so that a thrust value during tightening is between predetermined minimum and maximum values.