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	A Player's Guide to Rotary Valve Trumpets
		We have also been importing rotary valve trumpets from several European makers such as Monke and Ganter for professional orchestral players wishing to use these instruments in their work, although we have until recently been somewhat apologetic for the high prices and variable quality which seemed to be characteristic of these instruments.
		For example, rotary valve trumpets have much larger and heavier bells, have less conical and therefore more cylindrical tuning, have a larger bore mouthpipe, and are often made of gold brass rather than the yellow brass used for most piston trumpets.
		The acoustical design of rotary valve trumpets is such that the pitch center of the tone on these instruments is broader and more flexible than on a piston valve trumpet, where the notes tend to "lock-in" more rigidly.
	www.aswltd.com /rotary.htm (4460 words)

	Rotary valve - Wikipedia, the free encyclopedia
		A rotary valve is a type of valve in which the rotation of a passage or passages in a transverse plug regulates the flow of fluid through the attached pipes.
		Rotary valves have been applied in numerous applications, ranging from changing the pitch of brass instruments to controlling the steam and exhaust ports of steam engines (most notably in the Corliss engine).
		In the context of brass instruments, rotary valves are usually found on French horns, and sometimes on other brasses; many European classical trumpet players tend to favor rotary valves, as do some tuba players.
	en.wikipedia.org /wiki/Rotary_valve (236 words)

	Divided rotary valve feeder - Patent 4536121
		The rotary valve feeder of claim 1 wherein the compartments of the troughs are in circumferential alignment with one another, thereby defining a plurality of annuli of compartments, each annulus of compartments being in communication with one of said channels.
		The rotary valve feeder of claim 14 wherein the discharge assisting means further includes a flexible member in each compartment, positioned between the port and the material, the flexible member defining with the compartment a gas space, whereby the compressed gas flexes the flexible member to assist the discharge of the material.
		Rotary valve feeders are commonly used to convey particulate material from a supply source to an area of use, especially where the area of use is pressurized and its atmosphere is at a higher pressure than the ambient pressure of the source.
	www.freepatentsonline.com /4536121.html (3133 words)

	Device for driving a rotary valve - Patent 4632082
		A rotary valve device according to claim 3, wherein one of said plate springs is provided for each rotary valve and has said straight portion and said bending portion, said plate springs having the same shape, said straight portions of the adjacent plate springs being interconnected.
		Thus, the rotary valves 5 anc 7 close the corresponding gas passages 1 and 3, and the rotary valves 6 and 8 open the corresponding gas passages 2 and 4 to the maximum extent.
		Thus, the rotary valves 5 and 7 open the gas passages 1 and 3 to the maximum extent, and the rotary valves 6 and 8 close the gas passages 2 and 4.
	www.freepatentsonline.com /4632082.html (2834 words)

	Elements of Brass Instrument Construction
		The valve loop is disengaged or engaged by the up-and-down movement of the piston within the casing that aligns the ports either with the main tubing or the valve loop.
		Rotary valves were developed by 1818, when Friedrich Blühmel and Heinrich Stölzel, both from Berlin, were asked to include them in their valve patent.
		String rotary valves come with a variety of different stopping mechanisms, such as the three-point-wing device with pin stop, the horseshoe-stop, and the V-shaped stop, which is a variation of the horseshoe-stop.
	www.usd.edu /smm/UtleyPages/Utleyfaq/brassfaq.html (1835 words)

	Manual and Electric Miniature Rotary Valve Design
		Examples of our valves used in HPLC instruments include a 2-way inert solenoid valve used to act as an off/on miniature fitting waste valve and as a pressure relief to protect an analysis cell.
		Our rotary valves are specified in instruments that measure air and water composition throughout the world rotary direction control valve.
		The valves are available in 4 and 5 port versions and any spare ports can be sealed with a plug (part number 2320) or by using a PTFE cone blank (part number 1514) for maximum flexibility.
	www.bio-chemvalve.com /miniature-rotary-valve-design.html (707 words)

	rotary valve steam regulator water pressure regulator natural gas pressure regulator high pressure regulator globe ...
		The Ranger QCT is a rotary valve with a pneumatic
		Characterization of the valve is accomplished attachment of a formed cam to a rotary valve 's stem.
		As the valve's stem rotates, the positioner's range spring causes output loading air pressure to be either passed to the actuator vessel, or be vented into the enclosed arm housing's internals.
	www.cashco.com /nms_rotary_valve/nms_rotary_valve.html (349 words)

	Rotary-Valve Internal Combustion Engines.
		This produces large forces on the valve system, however it is contrived; the beauty of the poppet valve is that such forces simply push it harder against its seat, and have no effect on the valve-actuating mechanism.
		The rotary valve was driven at a constant 1/4 of crankshaft speed.
		The rotary bearing was of the Cross or horizontal type, rotated by a toothed belt at crankshaft speed as this is a two-stroke.
	www.dself.dsl.pipex.com /MUSEUM/POWER/RotaryValveIC/RotaryValveIC.htm (2325 words)

	Instrument Care: Oiling Rotary Valves
		The first is similar to the piston valve: the valve core and the inner sleeve (light oil).
		The third area is all the joints along the mechanical linkage found on rotary valves not using string linkage (the heavy oil).
		This technique should be used on all rotary valves, including the attachments found on trombones, fifth valves on piston tubas, and all usual rotary valves found on french horns and tubas.
	www.stusmusic.com /icrotor.html (446 words)

	rotary valves, rotary airlocks, rotary valve, rotary airlock, diverter valve, gate valve, pneumatic conveyor, screw ...
		Rotary Valves (Airlocks) regulate the flow of material from one chamber to another while maintaining a good airlock condition.
		A double dump valve is commonly used in pneumatic applications where a rotary airlock is not suitable due to the potential for leakage.
		All Sunco double dump valves consist of two flaps connected by counterweights or spring-loaded spindles, which are operated by means of a motor-driven cam.
	www.suncopowder.com (721 words)

	Early Valve Designs
		The second valve design which was widely used in Germany was the rotary valve, produced as early as 1824 by Nathan Adams (1783-1864) of Boston [Eliason, 91] and patented in 1835 by Riedl [Dahlqvist, 118.
		Although rotary valves are difficult to disassemble for maintenance, this type of valve was to become the standard design used on horns in Germany by the late nineteenth century [Carse, ibid].
		Périnet piston and rotary valves offered the quickest action and were the most efficient in their overall design; for these reasons they are still widely used today.
	www.public.asu.edu /~jqerics/earlval.htm (1249 words)

	ISA \| Rotary Control Valve Offers Smart Solution (Site not responding. Last check: 2007-10-20)
		Rotary valve manufacturers have developed live-loaded packing designs, which are almost equal to linear valves with a bellows gland.
		To optimize valve selection, the size to choose should have a valve opening that under normal conditions should be somewhere in the range from 60 percent to 80 percent open.
		This type of valve characterizes itself by a torturous flow path, and some call it a low recovery valve because some of the energy in the flow stream is dissipated.
	www.isa.org /InTechTemplate.cfm?Section=Article_Index1&template=/ContentManagement/ContentDisplay.cfm&ContentID=51817 (2360 words)

	Welcome to Coates International Ltd.
		This caused the poppet valves and combustion chamber on poppet valve engines to overheat, raising the temperature to in excess of 2500 degrees F and damaging the poppet valves.
		At higher RPMs the poppet valve tends to float or bounce and is unable to service the cylinder and chamber to capacity with air and fuel mixture.
		Because the valves rotate away from the combustion chamber and are vented and charged on the opposite side of each sphere, this creates a lower combustion chamber temperature, allowing for higher compression ratios to be used thus creating an extremely efficient engine.
	www.coatesengine.com /engine_of_the_future.html (923 words)

	Rotary valve shaft replacement, Rotax 532 Rotary valve shaft replacement, Rotax 532 aircraft engine rebuilding manual.
		First indications of this are discolouration of the rotary valve oil, found in the rotary valve tank.
		Pressing the gear end of the rotary valve shaft against your body, with your fingers apply pressure down on the spring holding cup (2), break the circlip (1) free from its retaining groove on the rotary valve shaft.
		Place rotary valve shaft assembly in freezer for approximately 15 minutes prior to installation, remove and place rotary valve shaft, with guide sleeve on end into rotary valve hole, intake side, until bearing rests against crankcase halves.
	www.ultralightnews.ca /rotax532/6.html (1956 words)

	Untitled Document
		Therefore 24 rotary valves are mainly applied for simulating moving bed molecular sieve absorption separation process units in order to realize the continuous absorption separation and produce high purity products.
		The valve position and zone signal feedback equipment is located on the top of the main valve and in a closed steel made cylinder.
		The hydraulic unit is a independent part of the 24 rotary valve, which supply enough pressurized and flow hydraulic oil for the drive mechanism of the main valve.
	www.hwvalve.com /English/10-rotary.htm (1666 words)

	Rotary Airlocks
		Rotary airlock valves are used to feed product from or into a pressure or vacuum system.
		The rotary valve maintains an airlock by the closely, machined tolerances between the internal rotor and rotary airlock body.
		Limited space typically requires the valve to be disassembled and the end cover removed for packing to be replaced.
	www.carolinaconveying.com /html/body_rotary_airlocks.html (754 words)

	Rotary valves for pneumatic conveying; bulk solids rotary valve
		Rotary Airlock Feeders/ Rotary Airlock Valves are used in pneumatic conveying systems, dust control equipment, and as volumetric feed-controls to maintain an even flow of material through processing systems.
		Rotary Airlock Valves are also widely used as volumetric feeders for metering materials at precise flow rates from bins, hoppers, or silos onto conveying or processing systems.
		Rotary airlock, airlocks, and rotary valves are useful as one component in a bulk or specialty material handling system.
	www.usairfiltration.com /parts/rotary_valves.htm (415 words)

	FlowBizVA.com
		A butterfly valve is a rotary valve that uses a disc as the closure member.
		The valve used for this purpose was a single seat, unidirectional shut-off valve with a single offset disc that operated against a polymeric seat.
		The primary drawback of a butterfly valve is that the disc and shaft are situated in the waterway.
	www.valvesandactuators.com /va/hiperf.htm (2298 words)

	FlowBizVA.com
		All rotary control valves modify the flow of the fluid that passes through the varying flow opening (orifice) as the valve closure element (ball, plug, disk) rotates in response to a control signal.
		The ability of a ball valve to handle pressure drop is largely dependent upon the support of the throttling member, the bearing sizes and locations, and the sealing member design.
		When standard rotary valves are not adequate for control service because of flow characteristics, pressure drop, or even material compatibility, some manufacturers offer specially engineered versions of their valves to satisfy special requirements.
	www.valvesandactuators.com /va/valve_manual.htm (2767 words)

	Nu-Con - Components - Rotary Valves
		Sanitary Rotary Valves - C Series - For general use on pneumatic conveying systems for both metering and air lock duties.
		USDA Plastic Rotor Rotary Valves - An alternative to stainless steel rotors, which eliminates the risk of metal-to-metal contamination.
		Rotary Valve Optional Accessories - Nu-Con rotary valves can be supplied with many options to customise for your specific requirements.
	www.nucon.com /components/rotaryvalves/index.html (246 words)

	Rotary Timing Valve and Rotary Union Introduction - Scott Rotary Seals
		Rotary Timing Valves provide flow and pressure from a stationary input to a rotating output, and provide on/off flow control where a fixed sequence pattern is maintained.
		A rotary union is used to transfer liquids and gases from stationary supply lines to rotating equipment.
		All of the passages are independent, so SRS rotary unions are suitable for transferring both fluids and gases through the same rotary union without cross contamination.
	www.scottrotaryseals.com /introduction.html (186 words)

	rotary airlock, rotary valve, offset flange rotary valve, drop in rotary valve, blow through rotary valves, dust ...
		An important key to rotary valve performance and long life is optimal valve selection based on your process requirements.
		Most valves are available in cast aluminum, iron, stainless steel, Monel, Hastelloy and Ni-hard and with a variety of metallic coatings.
		Offset Flange Rotary Valve (OF Series) shares all of the heavy duty castings and precision machining of the IF series, with the exception of the offset flanges.
	www.bushandwilton.com /uk/rotary.htm (606 words)

	Sanitary Rotary Valves
		The Niro sanitary rotary valve is the perfect design for continuous discharge of powders and granulates from a food or dairy processing application.
		The Niro rotary valve consists of a tapered housing and rotor, with gear and motor drive.
		The Niro rotary valve is applicable for the discharge of particulate material from dryers and solids handling equipment, and for coarse dosing to solid-to-solid and solid-to-liquid systems.
	www.niroinc.com /html/drying/fdrotvalves.html (306 words)

	Howstuffworks "How Car Steering Works"
		The key to the rotary valve is a torsion bar.
		As the bar twists, it rotates the inside of the spool valve relative to the outside.
		Since the inner part of the spool valve is also connected to the steering shaft (and therefore to the steering wheel), the amount of rotation between the inner and outer parts of the spool valve depends on how much torque the driver applies to the steering wheel.
	auto.howstuffworks.com /steering4.htm (536 words)

	Custom Union Products for air, hydraulic, steam, water, and coolants.
		The custom rotary union shown is constructed from carbon steel,utilizes a precision ground shaft, radial ball bearings and Teflon seals.
		This is a two passage rotary union with 1/4” passages and a four inch bore through the rotor.
		Rotary Systems’ new line of work-holding unions are available in two, four and six passage models.
	www.rotarysystems.com /custom.htm (534 words)

	Quasiturbine> Type> Rotary Expander (Site not responding. Last check: 2007-10-20)
		Conventional valve pressure control makes the line pressure energy to be dissipated in heat on the low pressure side of the valve, which overheat the low pressure steam and required some cooling device generally not recovering this energy (often megawatts).
		Substantial heat is now given to conventional expansion valve in pure lost, while heat given to the gas at the intake of a rotary expander is essentially all recovered in mechanical energy or electricity.
		The Quasiturbine rotary expander allows for individual chambers to expand at a variable reduced pressure during expansion, and therefore reduces the transformation of the gas' kinetic energy into destructive heat.
	quasiturbine.promci.qc.ca /ETypeExpander.htm (2366 words)

	Halfbakery: Rotary Valve Engine
		The "valve shaft" or "rotary valve" would allow for extremely high rpm's without the risk to the pistons that are created when a spring looses it's performance traits.
		An additional aspect to this is the ability to change the "valves" of an engine with the removing of a cover plate on the side, removing the old valve shaft, and replacing with a new one (checking the index for timing).
		The thought is that an engine could be built with relatively large openings for these valve notches (thus allowing larger amounts of fuel into the engine, increasing hp.), and with a few minutes of modification (replacing the valve shaft), taking the car from "wild" to "mild" for city driving and better gas mileage.
	www.halfbakery.com /idea/Rotary_20Valve_20Engine (1418 words)

	Rotary Direction Control Valve - Small and Large
		The patented design miniature fluid pump imparts an exceptionally durable syringe valve, non-sticking pinch valve with no-clog flow path for handling solenoid valve aggressive, particulate-laden liquids.
		Choose from a wide range of configuration electronic metering pumpoptions and performance characteristics to meet solvent usage and desiredcorrosion resistant solenoid valvesgradient formation for multiple inlets or outlets.
		Bio-Chek from biochem valveIn-line check valves provide a gentle, economical miniature solenoid valve, non-metallic flow path for handling low volume plastic solenoid valves, low flow transfersinert valvewithout causing backflow or miniature check valveturbulence.
	www.bio-chemvalve.com /rotary-direction-control-valve.html (509 words)

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