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HEAD PRESSURE CONTROL [14 records]

Record 1 2022-09-30

English

Subject field(s)
  • Fluid Mechanics and Hydraulics (Physics)
  • Energy (Physics)
CONT

A combination of electronic and hydraulic systems is widely used because it combines the advantages of both electronics control and hydraulic power.... Hydraulic capacitance is... used to describe energy storage with a liquid where it is stored in the form of potential energy... A height of liquid in the container...(called pressure head) is one form of such storage...

French

Domaine(s)
  • Mécanique des fluides et hydraulique (Physique)
  • Énergie (Physique)

Spanish

Save record 1

Record 2 2017-05-11

English

Subject field(s)
  • Diagnostic Procedures (Medicine)
  • Health Law
CONT

Criteria for Brain Death. The criteria for the determination of brain death were developed such that any physician in any milieu could confidently diagnose it. All criteria must be met before a diagnosis of brain death can be made : The patient must be unconscious. The patient must be unable to breathe spontaneously and would therefore be on a ventilator. There must be no response to external stimuli(verbal, pain). There must be no response(eye movement) to passive head movements or to ice water syringed into the ears. There must be no blinking in response to touching the cornea. There must be no pupil response to a bright light shone into the eyes. The patient must be unable to maintain blood pressure, control fluids and electrolytes or body temperature.

CONT

... brain death criteria are applied consistently in hospitals where donations take place.

French

Domaine(s)
  • Méthodes diagnostiques (Médecine)
  • Droit de la santé
CONT

Critères de la mort cérébrale. Les critères établis pour déterminer la mort cérébrale ont été conçus de façon que tout médecin puisse, quel que soit le milieu, faire le diagnostic en toute confiance. La conjugaison de tous les critères est nécessaire pour diagnostiquer la mort cérébrale. Le malade est inconscient. Le malade est incapable de respirer spontanément et ne peut donc respirer qu'à l'aide d'un appareil respiratoire. Absence de réaction aux stimuli externes (parole, douleur). Absence de réaction (mouvements de l'œil) aux mouvements passifs de la tête ou à l'injection d'eau glacée dans les oreilles. Absence de clignement de la paupière lorsqu'on touche à la cornée. Absence de réaction de la pupille lorsqu'un faisceau lumineux intense est pointée sur l'œil. Le malade est incapable de maintenir sa tension artérielle, de contrôler ses liquides organiques, de maintenir son équilibre électrolytique ou de contrôler la température du corps.

Spanish

Save record 2

Record 3 2017-04-20

English

Subject field(s)
  • Nuclear Fission Reactors
CONT

A reactor pressure vessel(RPV) of a boiling water reactor(BWR) typically has a generally cylindrical shape and is closed at both ends, e. g., by a bottom head and a removable top head. A core assembly is contained within the RPV and includes the core support plate, fuel assemblies, control rod blades and a top guide. A core shroud typically surrounds the core assembly and is supported by a shroud support structure. Particularly, the shroud has a generally cylindrical shape and surrounds both the core plate and the top guide. There is a space or annulus located between the cylindrical reactor pressure vessel and the cylindrically shaped shroud.

French

Domaine(s)
  • Réacteurs nucléaires de fission
CONT

Dans l’ABWR [réacteur à eau bouillante de type avancé], l’eau descend entre la jupe et la cuve, pénètre au centre par des ouvertures et remonte à l'intérieur de la jupe entre les tubes guides. Le haut de la jupe porte un anneau cylindrique massif de 5 m de diamètre et de 4 m de haut : l'enveloppe du cœur (core shroud).

Spanish

Save record 3

Record 4 2012-06-18

English

Subject field(s)
  • Construction Site Equipment
  • Sewers and Drainage
  • Transport of Water (Water Supply)
  • Drilling and Boring (Construction)
CONT

A Soltau Model RVS 250-AS-STS microtunneling machine with a slurry spoil removal system was selected on a lease arrangement to install the 24-in. sewer line. A mixed face cutting head configuration was selected in anticipation of the varying ground conditions. The unit is supplied with high pressure water jets which have proven effective in boring through dense clays. The RVS 250-AS-STS involves two new innovations. First, it utilizes a state-of-the-art laser guidance system coupled with a completely digital operator control panel with continuous, up-to-date information on the tunneling process. A data logger, which can record data at specific time intervals or length of pipe jacked, also provides for a permanent record of the operation.

OBS

Microtunneler may also refer to the one who operates the machine.

Key term(s)
  • microtunnelling machine
  • microtunnelling boring machine
  • microtunneller

French

Domaine(s)
  • Matériel de chantier
  • Égouts et drainage
  • Adduction d'eau (Alimentation en eau)
  • Sondage et forage (Construction)
DEF

Appareil de forage servant au microtunnelage.

CONT

[...] des métiers de haute technicité : travaux souterrains, rénovations d'ouvrages d'art, recyclage des déchets de chantiers routiers, microtunnelier (une technique d'assainissement permettant de réaliser des travaux sans tranchées)...

Spanish

Save record 4

Record 5 2010-04-08

English

Subject field(s)
  • Equipment (Oil and Natural Gas Extraction)
  • Oil Drilling
  • Petroleum Technology - Safety
CONT

A stabbing valve is kept on the work floor to put into tubing if needed, when the well begins blowing in. ... The stabbing valve must ... (a) be a National Association of Corrosion Engineers rated full opening valve with the proper threads to mate to the completion string thread in use; (b) the stabbing valve must have a pressure rating equal to or greater than the blow out preventer pressure rating; (c) extended bails must be used to allow string weight to be borne by the tubing, rather than the stabbing valve; (d) the stabbing valve must not be used as a working valve; (e) the stabbing valve must be stored in an area immediately accessible to the well bore.

CONT

Every drilling installation should be equipped with ancillary well control equipment consisting of... at least two stabbing valves with appropriate cross-over subs to fit each type of connection in the drilling assembly which should be designed to be safely and quickly installed in the drilling assembly and closed to isolate and control pressure in the drill stem to allow the kelly or high pressure circulating head to be installed.

French

Domaine(s)
  • Outillage (Extraction du pétrole et du gaz)
  • Forage des puits de pétrole
  • Sécurité (Technologie pétrolière)
OBS

vanne d'intervention d'urgence : terme obtenu de l'Institut français du pétrole.

Spanish

Save record 5

Record 6 2010-02-26

English

Subject field(s)
  • Measuring Instruments
  • Aeronautical Engineering and Maintenance
OBS

oil pressure to the control cylinder is controlled through a metering valve in the flow control sensing head which senses change in airflow and air density.

French

Domaine(s)
  • Appareils de mesure
  • Aérotechnique et maintenance

Spanish

Save record 6

Record 7 2003-08-01

English

Subject field(s)
  • Flight Instruments and Equipment (Aeroindustry)
CONT

This [pressure rate] controller was located below the center power quadrant, below the autopilot control head and near the floor so that it would be accessible to either crew member.

French

Domaine(s)
  • Instruments et équipement de bord (Constructions aéronautiques)
CONT

En C3, de nombreux éléments appartenant au cockpit sont plaqués contre un transformateur électrique en béton. On y retrouve les sièges pilotes, les manettes de puissance et le boîtier de commande du pilote automatique.

Spanish

Save record 7

Record 8 2000-10-26

English

Subject field(s)
  • Plywood
  • Facilities and Equipment (Wood Industries)
CONT

The curtain coater comes in two types :(1) pressure head and(2) gravity feed. The pressure head is essentially a V-shaped reservoir made airtight by a removable cover and fitted across the bottom with an adjustable gap. A variable-speed, positive-displacement pump sends adhesive into the reservoir. Spread control is determined by the width of the knife gap, the pump speed, and the viscosity of the glue... The gravity feed system is the forerunner of the pressure head. The application method is quite similar, with one important difference : the curtain velocity cannot be controlled. The curtain falls as a waterfall, the weight controlled by mass and height.

OBS

curtain coating: A method of glue application in which the veneer passes through a "curtain" of adhesive.

French

Domaine(s)
  • Contreplaqués
  • Installations et équipement (Industr. du bois)
CONT

Encolleuse à rideau [...] Principe de fonctionnement. Le système comporte : un bâti, un réservoir à produit pouvant être muni d'un dispositif de chauffage, une pompe, un filtre, une tête d'application, une goulotte de récupération, des canalisations reliant la pompe à la tête d'arrosage et la goulotte de récupération au réservoir, ainsi qu'un tapis transporteur pour les pièces à encoller. L'enduction du subjectile se réalise par passage de ce dernier à travers un rideau de produit. La tête d'application appelée également tête d'arrosage, est une sorte de réservoir [Elle] peut être d'exécution «ouverte» ou «fermée». En exécution ouverte, le rideau se forme par gravité; la quantité déposée dépend de l'ouverture des lèvres et de la vitesse de passage à travers le rideau de la pièce à traiter. En exécution fermée, on a la possibilité de travailler soit par gravité, soit sous légère pression ou dépression.

Spanish

Save record 8

Record 9 2000-02-16

English

Subject field(s)
  • Dredging
  • Environmental Studies and Analyses
CONT

Automatic cutterhead control(to record and control swing speed, wheel or head rotation, pressure and slurry speed in suction and discharge lines, and slurry solids content).

French

Domaine(s)
  • Dragage
  • Études et analyses environnementales
CONT

Contrôle automatique de la tête désagrégatrice (enregistre et contrôle la vitesse de balayage et de rotation de la roue/tête, la pression et la vitesse des boues dans les conduites d'aspiration et d'expulsion, la concentration de solides dans les boues).

Spanish

Save record 9

Record 10 1993-07-15

English

Subject field(s)
  • Pulp Preparation (papermaking)
OBS

High-Consistency System. Figure 11-18 shows a representative system where pulp is handled in the 25% to 28% consistency range. Typically, a press is used to raise the feed consistency to about 30%. Fresh caustic or oxidized white liquor along with the magnesium protector is added to the pulp at the discharge of the press. A thick stock pump then transfers the pulp to a fluffer via a feed pipe in which a gas-tight plug is formed. The fluffed pulp flows down the pressurized reactor as a loose bed, while gaseous oxygen is continuously dissolved into the liquid phase and reacted with the pulp.... Oxygen gas is added to either top or bottom to maintain a partial pressure within the 90 to 130 psi range. Relief is taken from the head space at the top of the tower to remove combustibles and other noncondensible gases, and control overall reactor pressure. At the bottom of the tower, the reacted pulp is diluted with post-oxygen filtrate and pumped at about 6% consistency to a blow tank.

French

Domaine(s)
  • Préparation de la pâte à papier

Spanish

Save record 10

Record 11 1993-06-04

English

Subject field(s)
  • Railroad Safety
  • Rolling Stock (Railroads)
DEF

Piston, on the intake valve of all three air compressor cylinders, that opens the intake valves when the maximum pressure in the main reservoirs has been reached.

CONT

An unloader piston that cuts out the compressing action is provided in each high and low pressure cylinder head. The unloader pistons are actuated with main reservoir air pressure when the compressor control magnet valve MV-CC is energized.

French

Domaine(s)
  • Sécurité (Transport par rail)
  • Matériel roulant (Chemins de fer)
DEF

Piston relié au clapet d'aspiration de chacun des trois cylindres du compresseur et dont la fonction est d'ouvrir ce clapet lorsque la pression dans les réservoirs principaux a atteint la valeur maximale.

CONT

Il faut remarquer le branchement du régulateur de pression entre les deux réservoirs principaux et le mode d'alimentation des pistons et soupapes de décompression.

Spanish

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Record 12 1988-10-31

English

Subject field(s)
  • Closing Devices and Nozzles (Mechanical Components)
  • Air Conditioning and Heating
DEF

Device used to control water flow which is responsive to head pressure of refrigerating system.

French

Domaine(s)
  • Obturateurs et buses (Composants mécaniques)
  • Conditionnement de l'air et chauffage
DEF

(...) vannes (...) utilisées pour l'alimentation en eau des condenseurs.

Spanish

Save record 12

Record 13 1988-10-21

English

Subject field(s)
  • Control Instrumentation (Mechanical Components)
  • Air Conditioning and Heating
DEF

Pressure-operated control which opens electrical circuit if high-side pressure becomes too high.

French

Domaine(s)
  • Dispositifs de commande (Composants mécaniques)
  • Conditionnement de l'air et chauffage
OBS

Pression de refoulement/discharge or head pressure (...) La pression de refoulement est la pression sous laquelle le compresseur refoule les vapeurs surchauffées (après la compression) dans le condenseur.

Spanish

Save record 13

Record 14 1980-09-17

English

Subject field(s)
  • Aeroindustry
OBS

the surge control sensing head(...) uses ram and static pressure sense signals from the dual pitot-static probe in the EDC [engine-driven compressor] discharge duct.

French

Domaine(s)
  • Constructions aéronautiques

Spanish

Save record 14

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