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Topic: Flow control valve


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  Flow control valve - Wikipedia, the free encyclopedia
A flow control valve regulates the flow or pressure of a fluid.
Control valves normally respond to signals generated by independent devices such as flow meters or temperature gauges.
Pneumatically-actuated globe valves are widely used for control purposes in many industries, although quarter-turn types such as (modified) ball and butterfly valves are also used.
en.wikipedia.org /wiki/Flow_control_valve   (244 words)

  
 Proportional Flow Control Valve -- South Bend Controls
The valve is useful for a wide range of viscosities and fluids due to the knife edge variable orifice.
This valve is configured to use a 35 ohm coil and operate to 100% rated flow capacity at 600 milliamps.
This proportional flow control valve may be used to control a variety of both liquid and gaseous fluids.
www.sbcontrols.com /proportional_flow_control.html   (581 words)

  
 Flow Control Valve
) is a fluid-actuated valve that permits pumping water to the surface or regulating the flow of water from the surface into the well, while using the same column pipe and maintaining a column of water in it at all times.
This flow path provides non-cavitating head loss that is easily controlled by changing the gap between the annular orifices and the rubber element.
The flow rate through a given valve is proportional to the square root of the driving head.
www.baski.com /fcv.htm   (524 words)

  
 ChiefDelphi Forums - Penumatic Flow Control Valve
From the good sense standpoint, putting two flow controls directly on a cylinder defies reason, which is not altogether out of the question under the circumstances.
Or perhaps the ports of the 'cylinder' is a transposition for 'valves'.
Having previously screwed the flow control into the A port on the compressor, and turning the Thomas on, I fiddled with the knob of the still quite effective needle valve.
www.chiefdelphi.com /forums/showthread.php?t=2114   (1089 words)

  
 Coen | AC Flow Control Valve
The Coen AC Flow Control Valve (Adjustable Characteristic) is the result of over forty years of continuous development and improvement.
The present AC Valve provides all of these features with the addition of reverse acting lever operation, low operating torque (approximately 30 inch pounds), flexibility of installation, compactness, a balanced piston type valve plug with characterized valve ports, and mechanical and material refinements for unequaled service.
In this system, a constant differential valve upstream of the AC valve (with pressure taps across the AC valve) meters fuel flow on the principle that for a constant pressure differential, flow will be proportional to orifice (or valve opening) size.
www.coen.com /i_html/acvalve.html   (652 words)

  
 MODEL J-1 4"-6" FLOW CONTROL VALVE   (Site not responding. Last check: 2007-09-11)
The valve body shall be ductile iron, with a grooved inlet and a grooved outlet.
The vlow control valve shall be listed for a working pressure of not less than 250 PSI (1724 kPa).
The flow control valve manufacturer is to be The Viking Corporation, and the flow control valve is to be Model J-1.
www.vikingcorp.com /specs/flow/506a.htm   (144 words)

  
 Flow control system for medical ventilator (US5331995)
A system including the method employed, for controlling the flow of a pressurized gas through a variable orifice flow control valve in a pressurized gas conduit system, such as a ventilator, in response to either a desired flow rate/volume input signal, a desired pressure signal or both.
With respect to the flow rate input signal, the system generates a flow signal indicative of the actual flow rate of gas through the flow control valve by measuring the pressure drop across the valve and using the actual orifice area based on a control valve position signal given to the valve.
Depending on the mode desired, either the volume flow reference signal or the pressure flow reference signal or the greater of the two becomes a flow reference signal that is used to generate a control valve position signal based on a predetermined relationship.
www.delphion.com /details?pn=US05331995__   (505 words)

  
 flow control valve - Find, Compare, and Buy at Shopping.com
Lefroy Brooks Archipelago Thermostatic Valve and Flow Control - GD8801-Anti...
Lefroy Brooks Archipelago Thermostatic Valve and Flow Control - GD8801-Sati...
Lefroy Brooks Archipelago Thermostatic Valve and Flow Control - GD8801-Silv...
www.shopping.com /xGS-flow_control_valve   (963 words)

  
 MODEL H-1 2"-6" FLOW CONTROL VALVE   (Site not responding. Last check: 2007-09-11)
Sprinkler systems requiring a means of automatic or remote manual opening or closing of the water supply shall utilize a flow control valve with a spring aided clapper.
Flow control valve shall be so constructed that the force of the spring and the differential of the valve clapper to water seat will close valve if detection or release system is reset.
Flow control valve shall be listed for a working pressure of not less than 250 PSI (1724 kPa).
www.vikingcorp.com /specs/flow/h1flowcontrol.htm   (108 words)

  
 flow control valve installation
What the valve does is stop the water flowing at idle and off idle speeds into the stinger where it builds up in the waterbox and exhaust hoses.
Step 2: When you cut the hose for the flow control valve installation, shorten it approximately one and a half to two inches (This is the length of the Jetworks flow control valve).
The flow control valve adds more water than the solenoid because the solenoid is limited to how much water it can flow, usually at 3/32 diameter orifice.
www.jetworks.net /instflow.htm   (792 words)

  
 Push-In Flow Control Valves
Push-to connect, unidirectional flow control valves, with one-piece design, for controlling the speed of a cylinder by regulating air exhaust.
Intake air flows freely through the flow control and exhaust air is metered out through a specially designed fine adjustment screw.
Push-to connect flow control valve for use where cylinder access is difficult or another fitting is attached to the cylinder port.
www.hosexpress.com /pushin/flowcontrol.htm   (74 words)

  
 Flow Control Valves - Hydraulic Cartridge Valves   (Site not responding. Last check: 2007-09-11)
This unit is a screw in, cartridge type, non-compensated, adjustable, bi-directional needle flow control valve.
This unit is a screw in, cartridge type, adjustable, poppet type, hydraulic flow control valve with or without free reverse flow check.
This unit is a screw in, cartridge type, non-compensated, adjustable, bi-directional rotary flow control valve.
www.commandcontrols.com /catalog/02.htm   (143 words)

  
 Support Forums - Flow Control Valve?   (Site not responding. Last check: 2007-09-11)
I then had a look at the flow through the valve and it displayed a classic diurnal pattern, starting at 9.6 l/s and peaking at over 20 l/s.
FCV's operate by enforcing the set flow at their location in the network, provided the hydraulics of the system up and downstream allow it.
You had a FCV trying to "push" 20 l/s into a network which only initially required 9.6 l/s, and which had no tanks in it to fill up to absorb the difference.
www.bossintl.com /forums/printthread/threadid/9844.html   (405 words)

  
 Lee presents App. Note: Valve Flow Control Using Pulse Width Modulation
By controlling the relative amount of time the valve is in the on state, one can vary the average amount of flow in proportion to the on time.
For example, if a valve can flow 3.0 liters per minute in the full on state, then the valve is cycled so that it is ON for 33% of the time, the valve will flow approximately 33% of the total flow capacity, or about 1 liter per minute.
By controlling the pressure and system constraints and characterizing the dynamic performance, a very reliable means of controlling flow can be obtained.
www.theleeco.com /EFSWEB2.NSF/1c6397740f8b45e1852563b9006d6bc6/893720ad39a7fc18852564bc006f7f2e!OpenDocument   (324 words)

  
 Valve engineering - Flow Control Valve, Delta P calculation question
This valve is used as a throttle-type flow control valve, and I was wondering how the %open would affect the pressure drop across this valve.
The steam flow trough the heat exchanger is controlled by the Fisher TCV2886.
Valve operation is automatic in response to a signal from a filled bulb temperature detector.
www.eng-tips.com /viewthread.cfm?qid=42126   (1255 words)

  
 Flow control valves UK | flow valve solutions
Unlike many conventional slide valvesused in flow control, the Disc Valve does not jam or leak, due to its unique angled seat and floating disc arrangement.
The Second Generation Disc Valve is an advanced version, which allows removal of the internal moving parts while the valve body remains in-situ.
A throttling valve, using a disc (or "butterfly") that rotates on an axis within the valve body, enabling flow control by varying the cross-section of the valve that is open to passage.
www.kemutec.com /htm/products/mucon/valves/flow/control.htm   (256 words)

  
 Control Valve Flow Coefficients   (Site not responding. Last check: 2007-09-11)
The flow coefficient for a control valve is an important hydraulic parameter that is used to select and design the controls for a closed conduit system.
It is important to understand the definition of the flow coefficient, how it is used, and how it is determined for a control valve.
Confusion has resulted in identifying which set of standards was used to generate the valve coefficient information, and the importance of designing a system using the same definition of the coefficient.
www.pubs.asce.org /WWWdisplay.cgi?8501929   (180 words)

  
 Cashco Flow Characteristics   (Site not responding. Last check: 2007-09-11)
Valve trims are specially designed, or characterized, in order to meet the large variety of control application needs.
This is necessary because most control loops have some inherent nonlinearities, which you can compensate for when selecting control valve trim.
When valves are installed with a pump, pipes, fittings, and other process equipment, the pressure drop across the valve will vary as the plug moves through its travel.
www.maintenanceresources.com /ReferenceLibrary/ControlValves/CashcoFlowChar.htm   (348 words)

  
 Flow-Control Valve works in fluid dispensing systems., Sealant Equipment Engineerin
With its No-DripĀ® carbide ball-end needle and hardened seat, the Flow Control Valve is designed to handle low- to high-viscosity and abrasive materials such as adhesives, sealants and lubricants.
It controls the flow of fluid materials and chemicals in both material-delivery and fluid-dispensing systems.
The Flow Control Valve also is used as a high-viscosity or high-flow dispense valve in automated, repetitive or high-speed dispensing applications, such as fixtured automation or robot-tool-mounted dispensing.
news.thomasnet.com /fullstory/462925/rss/954   (913 words)

  
 Flow Control Valves
Flow increments: 1/4, 1/2, 3/4, 1, 1-1/2, and 2 GPM (1.0, 1.9, 2.8, 3.8, 5.7, and 7.6 l/m) flow rates, then in 1 GPM (3.8 l/m) increments from 3 to 120 GPM (22.7 to 454.2 l/m).
These flow controls are designed for liquids similar in viscosity to water.
The Series "FC" flow controls are used to maintain a constant pre-determined flow in a system.
www.plastomatic.com /fc.html   (437 words)

  
 FLOW CONTROL VALVES   (Site not responding. Last check: 2007-09-11)
Series PF Utilizes a ball type check that meters the flow of air or hydraulic oil in one direction and allows for free flow in the reverse direction.
Used to control actuator speed by acting as a restriction.
Ideal for use as speed control on hydraulic and pneumatic systems where a reverse flow check valve is not needed.
www.tamparubber.com /mainfcv.htm   (240 words)

  
 Jordan Valve Low Flow Control Valves
With flow control in the micro-Cv range, the Mark 708 is produced in a variety of materials including Carbon Steel, Stainless Steel, Hastelloy B and C, Alloy 20, Monel, and Titanium.
Mark 708BS: lightweight, compact control valves with bellows stem seal for dependable leakage protection where tight containment of service fluid is desired.
Series 8000 Three-Way: features a three-way body for varied uses: mixing two separate flow sources into one common line; diverging a single flow path into two separate streams; or as a bypass to divert flow from one outlet to another.
www.valvedepot.com /catalogue/control/060356301.htm   (430 words)

  
 Flow Control Valve Systems And Solenoid Valves - Cole-Parmer Catalog
Control your flow with direct inputs from pressure, temperature, or flow sensors
They’re the perfect choice for controlling pressure, temperature, or flow rates in process plants, engineering facilities, or anywhere precise control is needed.
To create one that matches your flow and control requirements, order a valve, a controller, and a programmer from below.
www.coleparmer.com /catalog/product_view.asp?sku=9860910   (170 words)

  
 Two-phase Flow In Control Valve - ChE Forums
I am aware control valves can be designed to handle two phase, but the flow regime in this case can be slug flow.
However, the feed into the control valve (while it may be saturated with dissolved gases) is not 2-phase.
What this winds up as (in an empirical plant) is a typical, Fisher, 90 degree angle valve where the Rich solution enters the top of the control plug rather the bottom and exits the CV out through the plug's bottom and into the Stripper.
www.cheresources.com /invision/index.php?showtopic=945   (1042 words)

  
 China 400X Flow Control Valve
The 400X flow control valve is a multifunctional valve that adopts the mode of flow control employed by high-precision pilot valves.
It is suitable for use in water distribution pipes within which the flow and pressure need to be controlled, and can serve to keep the preset flow constant, restrict excessive flow at a preset value and reduce the excessively high pressure upstream properly.
This valve differs from other conventional throttle valves, which normally work through reducing the flow area by means of orifice plates or purely mechanically, by making use of an appropriate pilot valve to minimize the loss of energy in the course of flow regulation.
cgvalve.en.alibaba.com /product/50065599/50297359/Hydraulic_Control_Valves/400X_Flow_Control_Valve.html   (337 words)

  
 ESCV (Electric Selective Control Valve) Flow Adjustment on 72-7520 Tractors
To accurately adjust the flow for certain applications (example would be hydraulic motor),a second valve may be required in the circuit.
First step is to adjust the tractor flow down as much as possible (using flow control adjustment in the tractor) and still provide adequate flow for proper operation.
Then install a second valve between the pressure line leaving the tractor and the application (hydraulic motor for example) to further reduce the flow and provide the final adjustment for proper operation.
www.deere.com /en_US/ag/servicesupport/tips/tractors/7000/waterloo-tractor-7020-escv-flow-adjust-ba.html   (212 words)

  
 FLOW CONTROL VALVE FOR COWL HOOD DOOR - Chevelle Tech
The GM washer valve is a one-way valve to keep washer fluid from running back into the washer bottle and keeps the washer pump primed.
Go put this in your vacuum hose where the valve goes, and by trial and error, test it by crimping the tubbing until you get the door closing just the way you want it to.
What I did, was hide it under the air cleaner and run a long single piece of hose from the vacuum pod to the homemade valve where it can't be seen.
www.chevelles.com /forums/showthread.php?t=899   (354 words)

  
 Valve ,Compressor,China compressor,Shanghai Ichi compressor CO. LTD.,www.compressor-china.com   (Site not responding. Last check: 2007-09-11)
Valves are used in a variety of industrial, military, commercial, and residential applications.
piston valves are parts of brass instruments used to change their pitch.
relief valve operates automatically at a set differential pressure to correct a potentially dangerous situation, typically over-pressure.
www.compressor-china.com /wiki/Valve.asp   (280 words)

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