摘要:
A system for feeding a slurry catalyst composition including: a primary slurry feed system comprising a primary slurry flow meter and a primary catalyst injection device, wherein the primary slurry flow meter measures a primary slurry catalyst composition flow rate to the primary catalyst injection device; and a secondary slurry feed system comprising a secondary slurry flow meter, a secondary carrier liquid, a secondary carrier liquid control device, and a secondary catalyst injection device, wherein the secondary slurry flow meter measures a secondary slurry catalyst composition flow rate to the secondary catalyst injection device, wherein the secondary carrier liquid control device controls a process parameter of the secondary slurry feed system based a ratio of the primary slurry catalyst composition flow rate to the secondary slurry catalyst composition flow rate.
摘要:
An apparatus for use in a multi-purpose piping system that provides water to both domestic uses and to fire sprinklers, the apparatus comprising: piping having an inlet and an outlet; a detector, located between the inlet and outlet, that distinguishes between a fire sprinkler water flow and a domestic use water flow; and a drain connection located between the inlet and the outlet. A multipurpose piping system using the apparatus in a system incorporating at least one fire sprinkler, the piping system also supplying at least one other use in the structure.
摘要:
An apparatus for supplying pressurized gas to a plurality of gas outlets from an upstream gas supply, in which each of the plurality of gas outlets in use is connected to a common gas feed line via a respective valve, each valve being adapted to close to prevent the flow of gas downstream of the valve in the event of the integrity of the feed line being breached downstream of the respective valve, to prevent the escape of gas from the breached feed line, and wherein each valve includes a valve member which is moveable into engagement with a valve seat to close the valve, and a valve member damping means to resist movement of the valve member into engagement with the valve seat.
摘要:
A system for dividing a single mass flow, including an inlet adapted to receive the single mass flow and at least two flow lines connected to the inlet. Each flow line includes a flow meter and a valve. The system also includes a controller programmed to receive a desired ratio of flow through a user interface, receive signals indicative of measured flow from the flow meters, calculate an actual ratio of flow through the flow lines based upon the measured flows, and compare the actual ratio to the desired ratio. The controller is also programmed to calculate the desired flow through at least one of the flow lines if the actual ratio is unequal to the desired ratio, and provide a signal indicative of the desired flow to at least one of the valves.
摘要:
An auto-switching sub-atmospheric pressure gas delivery system, for dispensing gas to a gas-consuming process unit, e.g., a semiconductor manufacturing tool, without the occurrence of pressure spikes or flow perturbations.
摘要:
The invention relates a method and a device for regulating individual sub-flows of a conveying system while the main flow is conveyed in a constant manner. The aim of the invention is to provide a method and a device which enable the sub-flows of the conveying lines of a system for conveying fluid media to be regulated as required in said individual conveying lines with just one conveyor unit. To this end, the inventive device for regulating individual sub-flows of a system for conveying fluid media has several conveying lines which are guided in parallel. The invention is characterized in that the following are arranged in the conveying system: at least one total pressure measuring device (10), at least one sub-flow measuring unit (D) in each conveying line, at least one valve (7) with a throttle (B) and a data acquisition, processing and control value output module (C), these being functionally interconnected by hardware and/or software.
摘要:
A system for dividing a single flow of gas into two or more secondary flows of known, precise values, without requiring a high upstream pressure. The system includes an inlet for receiving the single gas flow, and first and second flow lines connected to the inlet. A mass flow meter measures gas flow through the first line and provides a signal indicative of the measured flow rate. A restrictor restricts gas flow through the first line to a desired flow rate, and has a smallest cross-sectional flow area selected to provide an upstream pressure high enough to allow the mass flow meter to operate properly and lower than a predetermined upper pressure limit. A mass flow controller receives the signal indicative of the measured flow rate from the mass flow meter and maintains a flow rate through the second line based on the signal.
摘要:
A flow priority valve receives input fluid flow and divides the fluid flow between a primary device and a secondary device. The valve comprises a valve body have a bore formed therein, the bore having first and second ends and first and second annular channels formed in communication with the bore. The valve body further includes an input flow channel formed in communication with the bore for receiving the input fluid flow. A spool is movable within the bore and has a first land and a second land adjacent opposing ends of the spool. A spring is positioned within the bore for biasing the spool towards the first end of the bore. An electronically variable orifice (EVO) for electronically adjusting flow includes an EVO input portion in fluid communication with both the first annular channel and the first end of the bore, and an EVO output portion in fluid communication with both the second end of the bore and the primary device. The second annular channel is in fluid communication with the secondary device. The first and second lands are movable with the spool for selectively limiting flow from the bore to the first and second annular channels, respectively. The valve may be used for remote flow control, splitting between primary and secondary devices, and two such valves may be used to provide variable control to two devices.
摘要:
A system by which a supplier of wet steam may allocate and measure the mass flow rate and quality of steam delivered to a demand user and one or more secondary users with the wet steam delivered to each user being measured for purposes of billing. Pressure regulator means between the demand customer and the secondary customers responsive to pressure changes caused by the amount of steam going to the demand customer. The demand customer thus being able to take from 0 to 100% of the steam generator output with the remaining steam being allocated to the secondary customers.
摘要:
The method of controlling operation of a plurality of fixtures comprises the steps of establishing a maximum liquid flow rate and determining which of the fixtures required operation. A determination is then made of the liquid flow rate of the fixture requiring operation and a calculation is made of whether operation of the fixture requiring operation will cause the maximum flow rate to be exceeded. The fixture requiring operation is caused to operate if the maximum flow rate will not be exceeded and is prevented from operating if the maximum flow rate will be exceeded.