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	orificeplate orifice plate meter run cheap flow meter
		Orifice plates are in common use in many installations.
		Orifice plate is used for flow rate measuring in pipe systems.
		Probably the most widely used differential pressure device is the orifice plate, the characteristics of which as a flow measurement device have been researched for over a 100 years, leading to the publication of many national and international standards.
	www.flowmeterdirectory.com /flowmeter_orifice_plate.html (759 words)

	Orifice plates from Wyatt Engineering
		The bore of the eccentric orifice is practically tangent to the inside diameter of the adjacent pipe.
		Like the segmental orifice plate, the bore can be placed at the top or bottom of the pipe and this design is relatively common in the chemical, pharmaceutical, pulp and paper, and petrochemical industries.
		The orifice plate thickness is chosen to limit plate deformation by taking into account the magnitude of the differential pressure and other defined stresses.
	www.wyattflow.com /products/orifice/optb_03.htm (562 words)

	Ink jet head orifice plate mounting arrangement - Patent 5703632
		The orifice plate has a plurality of edge portions and the ejection outlets are arranged along a line that runs parallel to at least one of the edge portions and intersects opposing edge portions at crossing points.
		As described, the front seal plate 10 is pressed and bonded around the entire periphery of the orifice plate 4a, and therefore, the stress produced in the front seal plate 10 is directly applied to the orifice plate 4a.
		The top plate 1300 is formed integrally with an ink jet opening 1500 for receiving the ink supplied from the ink container IT and directing the ink to the common chamber, and also with an orifice plate 400 having the plurality of ejection outlets corresponding to the ink passages.
	www.freepatentsonline.com /5703632.html (6155 words)

	Orifice Meter Publications
		Orifice plates are known to be sensitive to a variety of effects due to dimensional variations and flowing fluid conditions.
		The primary element of the orifice meter is the orifice plate and orifice meter tube consisting of the orifice fitting, or flanged pressure taps, adjacent piping and the flow conditioner or straightening vanes.
		Twelve different orifice plates with diameter ratios (Beta ratios) from 0.25 to 0.54 were calibrated in 76mm (3") and 102 mm (4") pipe using flange taps.
	www.ceesi.com /pubs_orifice.aspx (1242 words)

	Orifice plate seal ring - Patent 4593915 (Site not responding. Last check: 2007-11-04)
		Because the orifice plate is subject to wear by impacting of sand, line scale and other foreign particles in the flowing gas stream, it must be replaced at frequent intervals to ensure accuracy in measurement.
		Conventionally, the orifice plate is positioned within the body of the fitting across the flow passage with seals closely surrounding it to ensure that all gas flow is through the orifice.
		The orifice carrier has an integral panhandle stem 56 which is pivoted at 58 on a crank arm 60 carried on a sealed rotatable shaft 62 with a squared end 64 for partial rotation as by means of a suitable wrench (not shown).
	www.freepatentsonline.com /4593915.html (1758 words)

	ORIFICE PLATE (Site not responding. Last check: 2007-11-04)
		The traditional orifice is a thin circular plate (with a tab for handling and for data), inserted into the pipeline between the two flanges of an orifice union.
		Flange taps are used with both types of plates, and are located in the quadrant opposite the opening for the eccentric orifice, in line with the maximum dam height for the segmental orifice.
		Orifice plates are, however, quite sensitive to a variety of error-inducing conditions.
	saba.kntu.ac.ir /eecd/Ecourses/instrumentation/projects/reports/Flowmeter/orifice.htm (1885 words)

	Orifice plate (Site not responding. Last check: 2007-11-04)
		The orifice plates are transducers used for measurement of the homogenous fluids flows spread in the pipes under pressure, by the method of decreasing the flow section, according to SR EN ISO 5167-1:97.
		For the existing orifice plates, in case of recalculation of the flow or differential pressure, at least the orifice plate type, the internal pipe diameter and the orifice diameter is necessary.
		The Port orifice plate type Fast is designed and produced to be used as a primary element in the measurement and counting systems of fluid flows in pipes under pressure, having circular section, using the method of decreasing the flow section, according to SR EN ISO 5167-1:97.
	www.ack.ro /eng/produse/ediafragme.html (405 words)

	Orifice Meter
		The Orifice meter is one of the many devices used to measure the volume or mass flow rate of fluids flowing in a closed conduit (pipe).
		This Orifice plate is thus installed into the pipe, sometimes using specialized "orifice plate changers" which conveniently hold the orifice plate in the pipe.
		High accuracy Orifice Meter installations downstream of Elbows, Two Elbows in and out of plane, headers and tees are the norm due to the use of the CPA 50E Flow Conditioners with Orifice Plate meters.
	cpacl.com /articles/orifice-meter.html (430 words)

	Orifice Meters for Water Flow Measurement
		Orifice meters are usually circular orifices placed at the end of a horizontal discharge pipe as illustrated in Figure 1.
		An orifice meter can be constructed from a pipe end-cap which has been properly drilled, if the discharge pipe is threaded to allow the end cap to be added for flow measurements or removed after its use.
		The orifice meter is very accurate because of the sensitivity of the water manometer, and, because of the absence of moving parts or the need for calibration, it is often used as a means of calibrating other flow-measuring devices.
	edis.ifas.ufl.edu /AE107 (1214 words)

	Continuous Boiler Blowdown, Continuous boiler blow down, blowdown flow rate, Madden Orifice meter
		Four different orifice plates (1A, 2A, 3A, and 4A) are available to provide a blowdown flow range suitable for the boiler operator to maintain the target boiler water quality level.
		The Madden Orifice Meter is guaranteed for up to 10 years against damage from cutting, wire drawing, or other distortion in the orifice plate.
		The orifice plate is heat treated to 500 brinnel hardness and lapped to a mirror finish with a tolerance of three light bands (.00003").
	www.boilerroomsupplies.com /blowdown/orifice-meter.html (475 words)

	Orifice plate - Psychology Central (Site not responding. Last check: 2007-11-04)
		An orifice plate is basically a thin plate with a hole in the middle.
		When the fluid reaches the orifice plate, with the hole in the middle, the fluid is forced to converge to go through the small hole; the point of maximum convergence is actually just after the physical orifice, at the so-called "vena contracta" point (see diagram).
		Orifice plates are small and cheap to install, but impose a significant energy loss on the fluid due to friction.
	psychcentral.com /psypsych/Orifice_plate (474 words)

	Orifice Plate (Site not responding. Last check: 2007-11-04)
		The orifice plate is the simplest of the flowpath restrictions used in flow detection, as well as the most economical.
		Eccentric orifice plates shift the edge of the orifice to the inside of the pipe wall. This design also prevents upstream damming and is used in the same way as the segmental orifice plate.
		Orifice plates have two distinct disadvantages; they cause a high permanent pressure drop (outlet pressure will be 60% to 80% of inlet pressure), and they are subject to erosion, which will eventually cause inaccuracies in the measured differential pressure.
	www.tpub.com /doeinstrument/instrumentationandcontrol27.htm (390 words)

	Small Diameter Orifice Plate Flow Meter Calculation for Liquids
		Orifice flow meters are used to determine a liquid or gas flow rate by measuring the differential pressure (P
		The two standard pressure tapping arrangements for small bore orifices are shown in the drawings; the location of the pressure taps affects the discharge coefficient somewhat.
		w is the static pressure loss occurring from a distance of approximately D upstream of the orifice to a distance of approximately 6D downstream of the orifice.
	www.lmnoeng.com /Flow/SmallOrificeLiq.htm (667 words)

	Barber Engineering & Controls - Orifice Plates and Orifice Plate Sealing Units
		To manufacture quality orifice plates, it is necessary to adhere strictly to the specifications and recommendations of Measurement Canada, The American Gas Association, American Society of Mechanical Engineers, American Petroleum Institute and American National Standard Institute.
		Both faces of the universal orifice plate are sealed against both seats of the orifice fitting.
		The removable seal is vulcanized to the orifice plate in 12 inch and larger sizes.
	www.barbereng.com /orificeplates.htm (613 words)

	Orifice Plate Type Flow Detector - Engineers Edge (Site not responding. Last check: 2007-11-04)
		The orifice plate Flow Detector is the simplest of the flow-path restrictions used in flow detection, as well as the most economical.
		Segmental and eccentric orifice plates are functionally identical to the concentric orifice.
		Orifice plates have two distinct disadvantages; they cause a high permanent pressure drop (outlet pressure will be 60% to 80% of inlet pressure), and they are subject to erosion, which will eventually cause inaccuracies in the measured differential pressure.
	www.engineersedge.com /instrumentation/orifice_plate_flow_detector.htm (404 words)

	Orifice plate with single bore
		It can be delivered as an orifice according to DIN 1952, as cylindrical orifice, as quarter circle nozzle or as a segmental orifice or double coned orifice according to appropriate conditions of use.
		The orifice plate may either be welded or screwed into the carrier-ring or may be manufactured as single piece.
		The orifice plate is easy to clean and thus suitable for media that become resinous, accumulate.
	www.dosch-gmbh.de /products04_e/products/dpflowmeter/blborificeplatewithsingleborepressuretaps (147 words)

	Flowrate Calculation for an Orifice Flowmeter
		To calculate the flowrate of a fluid passing through an orifice plate, enter the parameters below.
		It is recommended that location 1 be positioned one pipe diameter upstream of the orifice, and location 2 be positioned one-half pipe diameter downstream of the orifice.
		Since the pressure at 1 will be higher than the pressure at 2 (for flow moving from 1 to 2), the pressure difference as defined will be a positive quantity.
	www.efunda.com /formulae/smc_fluids/calc_orifice_flowmeter.cfm (365 words)

	Small Diameter Orifice Plate Flowmeter Calculation for Liquids
		The two standard pressure tapping arrangements for small bore orifices are shown in the drawings; the location of the pressure taps affects the discharge coefficient somewhat.
		The LMNO Engineering small diameter orifice calculation is valid for orifices installed in pipes having pipe diameters between 1 cm and 5 cm (2 inch), and pipe Reynolds numbers greater than 1000.
		w is the static pressure loss occurring from a distance of approximately D upstream of the orifice to a distance of approximately 6D downstream of the orifice.
	lmnoeng.com /Flow/SmallOrificeLiq.htm (655 words)

	Orifice plate for injector and method of manufacturing the same - US Patent 5752316 (Site not responding. Last check: 2007-11-04)
		Orifice plate for injector and method of manufacturing the same
		An orifice plate to be mounted at a fuel jet section of an injector has a plurality of jet holes formed therethrough for injecting fuel.
		The orifice plate includes a curved surface formed at an inlet peripheral edge of each of the jet holes, and a cylindrical projection formed at an outlet of each of the jet holes.
	www.patentstorm.us /patents/5752316.html (113 words)

	Orifice Flanges ( Class 600 Orifice Flanges )(P10) - Seyu Flange Co.
		They are basically the same as standard welding neck, slip-on and screwed flanges except for the provision of radial, tapped holes in the flange ring for meter connections and additional bolts to act as jack screws to facilitate separating the flanges for inspection or replacement of the orifice plate.
		Orifice flanges are widely used in conjunction with orifice meters for measuring the rate of flow of liquids and gases.
		Each orifice flange is provided with two pressure tap holes extending radically from the outside diameter of the flange to the inside diameter of the flange.
	www.allproducts.com /korea/seyu/p10.html (1048 words)

	Orifice plate for inkjet printhead - US Patent 6375313 (Site not responding. Last check: 2007-11-04)
		A process for forming an orifice plate for a thermal inkjet printhead involves the use of a photoimageable polymer and photolithography for forming a plastic orifice plate having a defined pattern of orifices therein.
		A substrate is used to support a photoimageable polymer layer (which ultimately becomes the orifice plate) during the photolithographic steps, which preserves the structural integrity of the polymer layer.
		A thermal inkjet print head assembly is also disclosed which involves bonding the plastic orifice plate to a polymer barrier layer of a thin film resistor heater structure using heat and pressure.
	www.patentstorm.us /patents/6375313.html (162 words)

	Differential Pressure Flowmeters
		For example, when a single 90° elbow precedes an orifice plate, the straight-pipe requirement ranges from 6 to 20 pipe diameters as the diameter ratio is increased from 0.2 to 0.8.
		Orifices used for material balance calculations should be on the same maintenance cycle.
		The downstream end of a nozzle is a short tube having the same diameter as the vena contracta of an equivalent orifice plate.
	www.tcomega.com /literature/transactions/volume4/T9904-07-DIFF.html (8957 words)

	Liquid Distributors - Orifice Riser Plate and Pan Distributors (Site not responding. Last check: 2007-11-04)
		Rauschert supplies orifice riser pan and plate distributors for towers four inches in diameter and larger.
		For the orifice riser pan distributor, gas also flows upward along the outside of the pan wall, which results in an increase in the open area.
		Orifice riser plate distributors are designed to sit upon a support ring.
	www.rauschertus.com /process_technologies/orifice_ld.html (170 words)

	Baliga Instrumentation: orifice holders,venturi tube, Meter run assembly, flow nozzle, orifice plate (quarter circle, ...
		Orifice assemblies are available as per ASTM B. 16.5 / 16.36 standards up to 24” size and pressure rating up to 2500 lbs.
		Quarter circle orfice plates are available up to 36” size and also orifice plates of various thickness 3.18 mm, 6.35 mm and 12.7 mm depending upon the the process requirement and as per ISA RP 3.2.
		Plates are supplied in SS316, Monel, Inconel, Hastalloy C with Square Edge, Quarter Circle, Eccentric and Conical Entrance Types.
	www.baliga.com /products/instrumentation.htm (260 words)

	Orifice Plate
		Orifice plate with welded-on handle/spade for direct installation between flanges with smooth sealing faces.
		Normally taken through the flange blade or in the pipeline at distances a1 and a2 from the orifice.
		There is a differentiation between pressure taps as flange taps according to DIN 19214 (figure 1) and D-D/2- pressure tapping within the pipe (figure 2) whereas a1 is equivalent to the pipe diameter D and a2 is identical with D/2.
	www.dosch-gmbh.de /products04_e/products/dpflowmeter/blsorificeplatedin19206/index.html (115 words)

	Piping & fluid mechanics engineering - Orifice plate sizing
		Are you able to advise the size of an orifice plate that will be fitted into a fire hydrant main to give a pressure drop, (when 1 hydrant is running at full bore) from 180 psi to 55psi.
		Orifice measurement is typical in the oil and gas sector, in particular, pipeline measurement.
		Hosec, focus on your problem you will see that an orifice plate will only work at full flow as soon as you reduce the flow or use the nozzle at the tip of the fire fighting hose the parameters are different.
	www.eng-tips.com /viewthread.cfm?qid=76665 (1618 words)

	Orifice plates from Wyatt Engineering
		Wyatt orifice plates, fittings, and meter runs can be fabricated for virtually any set of process or ambient conditions.
		While orifice plates produce differential pressures, properly manufactured orifice flanges are necessary to turn those differential pressures into a flow measurement.
		Tap hole centers are 23.813 mm (0.9375") from bearing faces of flanges, placing their centerlines 25.4 mm (1.00") from the face of the orifice plate when 1.588 mm (0.0625") compressed gasket thickness is considered.
	www.wyattflow.com /products/orifice/optb_02.htm (519 words)

	Large Bore Orifice Flowmeter for Liquids
		Orifice flowmeters are used to determine a liquid or gas flowrate by measuring the differential pressure (P
		An orifice flowmeter is typically installed between flanges connecting two pipe sections (flanges are not shown in the above drawings).
		The three standard pressure tapping arrangements are shown in the drawings; the location of the pressure taps affects the discharge coefficient somewhat.
	www.lmnoeng.com /orifice.htm (683 words)

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