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Pojistný ventil Veiligheidsventiel Vàlvula de seguretat Предохранительный клапан Zawór bezpieczeństwa 安全阀 صمام أمان Soupape de sécurité Valvola di sicurezza Sekurecvalvo Sicherheitsventil Запобіжний клапан Safety valve Säkerhetsventil Válvula de alivio de presión 安全弁
rdfs:comment
Pojistný ventil je zařízení, které při překročení nastaveného přetlaku automaticky otevře a tím odvede médium mimo chráněné zařízení. Odpouští se většinou do volného prostoru, hořlavé plyny do bezpečného prostoru, zemní plyn např. nad střechu budovy. Používá se na tlakových nádobách, kotlích, v topných systémech, ohřívačích, a všech systémech, které je třeba chránit před nárůstem tlaku. La valvola di sicurezza (o valvola di emergenza, in inglese safety valve, sigla SV) è una valvola che ha una funzione generica in grado di aumentare il livello di sicurezza di un . Per esempio una valvola di sicurezza con la funzione particolare di su un componente meccanico al fine di garantirne l'integrità strutturale viene solitamente realizzata come una valvola di rilascio in pressione (PSV), che in questo caso viene detta precisamente valvola di rilascio di sicurezza (SRV). In Italia e nell'Unione europea è la direttiva apparecchi a pressione a obbligare e regolamentare l'impiego di valvole di rilascio di sicurezza su un recipiente in pressione, come una caldaia (per esempio il serbatoio dell'acqua nella parte inferiore di una caffettiera moka), una pentola a pressione, o su tubazion Las válvulas de alivio de presión, también llamadas válvulas de seguridad o válvulas de alivio (son elementos distintos, favor revisar norma ASME de elementos de sobrepresión para recipientes) , están diseñadas para aliviar la presión cuando un fluido supera un límite preestablecido (presión de trabajo). Su misión es evitar la explosión del sistema protegido o el fallo de un equipo o tubería por un exceso de presión. Existen también las válvulas que alivian la presión de un fluido cuando la temperatura (y por lo tanto, la presión) supera un límite establecido por el fabricante. Запобі́жний кла́пан (рос. предохранительный клапан, англ. safety valve, нім. Sicherheitsventil n) — гідроклапан, призначений для захисту від механічного руйнування обладнання і трубопроводів надлишковим тиском, шляхом автоматичного випуску надлишку рідкого, паро- чи газоподібного середовища з систем і посудин з тиском, що перевищив встановлене значення. Клапан також повинен забезпечувати припинення скидання середовища при відновленні робочого тиску. Запобіжний клапан є арматурою прямої дії, що працює безпосередньо від робочого середовища, поряд з більшістю конструкцій захисної арматури і регуляторами тиску прямої дії. Sekurecvalvoj protektas premŝarĝitajn ujojn (ekzemple vaporkaldronoj, premujoj kaj tubaroj) kontraŭ tro granda premo, kiu kondukus al damaĝoj en fermitaj . Sekurecvalvoj ellasas la gason, vaporon aŭ fluidaĵon en la atmosferon aŭ aliajn tubarojn, kiam la premalto superas certan kvanton. صمام الأمان هو صمام له آلية عمل تقوم بشكل آلي تلقائي بتحرير المواد مثل البخار من المرجل (الغلاية) أو أي وعاء ضغط أو أي أنظمة أخرى وذلك عندما يتجاوز الضغط أو درجة الحرارة الحد المعطى له. 安全阀门(英语:safety_valves)是在设备故障时防止事故的一种阀门。安全阀的其中一个重要的类别是:紧急自动泄压阀(PRV),当压力或温度超过预设限值时,它将自动从锅炉、压力容器或其他系统中释放物质。先导式安全阀是一种特殊类型的压力安全阀。防渗漏效果好,成本造价较低,一次性紧急使用,具备安全阀工程的装置是爆破片或爆破帽。 安全弁(あんぜんべん、英: safety valve)または逃がし弁(にがしべん、英: relief valve)は、圧力機器や圧力配管において内部圧力が異常に上昇した際に自動的に圧力を放出させ内部圧力の降下とともに自動的に閉じる構造の弁である。 Zawór bezpieczeństwa (klapa, klapa bezpieczeństwa) – zawór otwierający się samoczynnie w chwili gdy ciśnienie gazu (pary) przekroczy dopuszczalną wartość co zapobiega eksplozji kotła, zbiornika, rurociągu itp. Po raz pierwszy zastosował go Denis Papin w zbudowanym w 1681 szybkowarze. W najprostszym wykonaniu jest to płytka łamliwa ulegająca zniszczeniu. Zapieczenie zaworu bezpieczeństwa, lub jego dodatkowe dociążenie było jedną z przyczyn eksplozji kotłów, dlatego czasem stosowano dwa niezależne zawory. Предохранительный клапан — трубопроводная арматура, предназначенная для защиты от механического разрушения оборудования и трубопроводов избыточным давлением путём автоматического выпуска избытка жидкой, паро- и газообразной среды из систем и сосудов с давлением сверх установленного. Клапан также должен обеспечивать прекращение сброса среды при восстановлении рабочего давления. Предохранительный клапан является арматурой прямого действия, работающей непосредственно от рабочей среды, наряду с большинством конструкций защитной арматуры и регуляторами давления прямого действия. Sicherheitsventile (Überdruckventile) gehören zu den Sicherheitsarmaturen nach DIN EN 806-1 bzw. DIN 3211 und schützen druckbeaufschlagte Räume oder Druckbehälter (z. B. Heiz- und Dampfkessel, Rohrleitungen, Reaktoren) vor einem für Druckgerät oder Drucksystem unzulässigen Druckanstieg. Bei Überschreiten des Ansprechdruckes werden Gase, Dämpfe oder Flüssigkeiten in die Atmosphäre oder in Sammelrohrleitungen abgeleitet. Ein Beispiel ist das Kesselsicherheitsventil einer Dampflokomotive. Les vàlvules d'alleujament de pressió , també anomenades vàlvules de seguretat o vàlvules d'alleujament , estan dissenyades per alliberar fluid quan la pressió interna supera el llindar establert. La seva missió és evitar una explosió, la fallada d'un equip o canonada per un excés de pressió. Existeixen també les vàlvules d'alleujament que alliberen el fluid quan la temperatura supera un límit establert. Aquestes vàlvules són anomenades vàlvules d'alleujament de pressió i temperatura . En säkerhetsventil är en ventil med en fjäder. Om trycket når det ventilen konstruerats för, eller ställts in på, så öppnas ventilen och släpper ut övertrycket. Une soupape de sûreté (terme officiel) ou soupape de sécurité (terme officieux) est un dispositif de protection contre les surpressions, dans des installations devant supporter de fortes pressions mais qui pourraient être endommagées, voire détruites, si la pression devenait trop élevée. Son fonctionnement est proche, même si son rôle est très différent, de celui du clapet anti-retour utilisé dans tout système où la circulation du fluide ne devrait s'effectuer que dans un seul sens, comme dans un chauffe-eau solaire. Een veiligheidsventiel of veiligheidsklep is een ventiel in een apparaat dat automatisch opengaat zodra de maximumwaarde van druk dreigt te worden overschreden, bijvoorbeeld om het drukopbouwende medium te laten ontsnappen, of dat wordt gesloten, om de toevoer van het medium te stoppen. Er zijn twee soorten veiligheidskleppen: automatische en gestuurde. Gestuurde veiligheidsventielen worden door een alarm in een elektronische besturing geschakeld. Automatische ventielen meten zelf de grootheid en bij overschrijding van de ingestelde grenswaarde sluit de klep. Een voorbeeld is het overdrukventiel. A safety valve is a valve that acts as a fail-safe. An example of safety valve is a pressure relief valve (PRV), which automatically releases a substance from a boiler, pressure vessel, or other system, when the pressure or temperature exceeds preset limits. Pilot-operated relief valves are a specialized type of pressure safety valve. A leak tight, lower cost, single emergency use option would be a rupture disk. Safety valves were first developed for use on steam boilers during the Industrial Revolution. Early boilers operating without them were prone to explosion unless carefully operated.
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n12:Oxygen-Safetyvalve.jpg?width=300
dbp:date
October 2011
dbp:group
note
dbp:reason
pilot monitors?
dbo:abstract
La valvola di sicurezza (o valvola di emergenza, in inglese safety valve, sigla SV) è una valvola che ha una funzione generica in grado di aumentare il livello di sicurezza di un . Per esempio una valvola di sicurezza con la funzione particolare di su un componente meccanico al fine di garantirne l'integrità strutturale viene solitamente realizzata come una valvola di rilascio in pressione (PSV), che in questo caso viene detta precisamente valvola di rilascio di sicurezza (SRV). In Italia e nell'Unione europea è la direttiva apparecchi a pressione a obbligare e regolamentare l'impiego di valvole di rilascio di sicurezza su un recipiente in pressione, come una caldaia (per esempio il serbatoio dell'acqua nella parte inferiore di una caffettiera moka), una pentola a pressione, o su tubazioni. Negli Stati Uniti invece sono le normative ASME Boiler and Pressure Vessels Code. I vari modelli di valvola di rilascio vennero sviluppati partendo da prototipi seicenteschi dell'inventore francese Denis Papin. La è stata storicamente la prima tecnologia impiegata su larga scala. Alle basse pressioni, al posto della molla si può usare una leva con contrappeso (valvola a contrappeso), e il modo di funzionamento è pressoché identico alla valvola a molla. Sekurecvalvoj protektas premŝarĝitajn ujojn (ekzemple vaporkaldronoj, premujoj kaj tubaroj) kontraŭ tro granda premo, kiu kondukus al damaĝoj en fermitaj . Sekurecvalvoj ellasas la gason, vaporon aŭ fluidaĵon en la atmosferon aŭ aliajn tubarojn, kiam la premalto superas certan kvanton. 安全阀门(英语:safety_valves)是在设备故障时防止事故的一种阀门。安全阀的其中一个重要的类别是:紧急自动泄压阀(PRV),当压力或温度超过预设限值时,它将自动从锅炉、压力容器或其他系统中释放物质。先导式安全阀是一种特殊类型的压力安全阀。防渗漏效果好,成本造价较低,一次性紧急使用,具备安全阀工程的装置是爆破片或爆破帽。 A safety valve is a valve that acts as a fail-safe. An example of safety valve is a pressure relief valve (PRV), which automatically releases a substance from a boiler, pressure vessel, or other system, when the pressure or temperature exceeds preset limits. Pilot-operated relief valves are a specialized type of pressure safety valve. A leak tight, lower cost, single emergency use option would be a rupture disk. Safety valves were first developed for use on steam boilers during the Industrial Revolution. Early boilers operating without them were prone to explosion unless carefully operated. Vacuum safety valves (or combined pressure/vacuum safety valves) are used to prevent a tank from collapsing while it is being emptied, or when cold rinse water is used after hot CIP (clean-in-place) or SIP (sterilization-in-place) procedures. When sizing a vacuum safety valve, the calculation method is not defined in any norm, particularly in the hot CIP / cold water scenario, but some manufacturers have developed sizing simulations. Запобі́жний кла́пан (рос. предохранительный клапан, англ. safety valve, нім. Sicherheitsventil n) — гідроклапан, призначений для захисту від механічного руйнування обладнання і трубопроводів надлишковим тиском, шляхом автоматичного випуску надлишку рідкого, паро- чи газоподібного середовища з систем і посудин з тиском, що перевищив встановлене значення. Клапан також повинен забезпечувати припинення скидання середовища при відновленні робочого тиску. Запобіжний клапан є арматурою прямої дії, що працює безпосередньо від робочого середовища, поряд з більшістю конструкцій захисної арматури і регуляторами тиску прямої дії. Небезпечний надлишковий тиск може виникнути в системі як в результаті сторонніх чинників (неправильна робота обладнання, передача тепла від сторонніх джерел, неправильно зібрана і т. д.), так і в результаті внутрішніх фізичних процесів, зумовлених певною вихідною подією, не передбаченою при нормальній експлуатації. Запобіжні клапани встановлюються скрізь, де це може статися, але особливо вони важливі в сфері експлуатації промислових та побутових об'єктів, що працюють під тиском. Існують і інші види запобіжної арматури, але клапани є найпоширенішими через простоту своєї конструкції, легкості налаштування, розмаїття видів, розмірів і конструктивних виконань. 安全弁(あんぜんべん、英: safety valve)または逃がし弁(にがしべん、英: relief valve)は、圧力機器や圧力配管において内部圧力が異常に上昇した際に自動的に圧力を放出させ内部圧力の降下とともに自動的に閉じる構造の弁である。 Une soupape de sûreté (terme officiel) ou soupape de sécurité (terme officieux) est un dispositif de protection contre les surpressions, dans des installations devant supporter de fortes pressions mais qui pourraient être endommagées, voire détruites, si la pression devenait trop élevée. Son fonctionnement est proche, même si son rôle est très différent, de celui du clapet anti-retour utilisé dans tout système où la circulation du fluide ne devrait s'effectuer que dans un seul sens, comme dans un chauffe-eau solaire. Een veiligheidsventiel of veiligheidsklep is een ventiel in een apparaat dat automatisch opengaat zodra de maximumwaarde van druk dreigt te worden overschreden, bijvoorbeeld om het drukopbouwende medium te laten ontsnappen, of dat wordt gesloten, om de toevoer van het medium te stoppen. Er zijn twee soorten veiligheidskleppen: automatische en gestuurde. Gestuurde veiligheidsventielen worden door een alarm in een elektronische besturing geschakeld. Automatische ventielen meten zelf de grootheid en bij overschrijding van de ingestelde grenswaarde sluit de klep. Een voorbeeld is het overdrukventiel. Een overdrukventiel gaat automatisch open als het drukverschil tussen in- en uitgang boven een ingestelde (veilige) waarde komt. Het wordt vaak gebruikt ter bescherming van een systeem dat onder bepaalde omstandigheden door de druk aan de binnenzijde zouden kunnen openbarsten of -breken of zelfs exploderen, zoals drukvaten en leidingwerk waar druk op staat. De veiligheidseisen met betrekking tot drukapparatuur zijn in Europa geregeld door de PED-richtlijn en de richtlijn m.b.t. drukvaten van eenvoudige vorm. Een veiligheidsventiel dat aangebracht is in een cv-installatie noemt men doorgaans overstortventiel. De veer die de klep gesloten houdt is afgesteld op een druk van 3 bar. Als de druk om welke reden dan ook boven deze druk oploopt zal een hoeveelheid water worden geloosd. Water dat wordt verwarmd, zet uit: bij verwarming van 10 tot 85 °C zo`n 3%. Volume- en drukveranderingen worden in eerste instantie opgevangen door een in de installatie aangebracht expansievat, raakt dit echter defect dan kan het toch gebeuren dat de druk te hoog oploopt. Voordat dit gebeurt, treedt het overstortventiel in werking. Indien het overstortventiel aangesloten wordt op het riool, moet dit gebeuren via een trechter. Een stoommachine is altijd uitgerust met een veiligheidsventiel. Les vàlvules d'alleujament de pressió , també anomenades vàlvules de seguretat o vàlvules d'alleujament , estan dissenyades per alliberar fluid quan la pressió interna supera el llindar establert. La seva missió és evitar una explosió, la fallada d'un equip o canonada per un excés de pressió. Existeixen també les vàlvules d'alleujament que alliberen el fluid quan la temperatura supera un límit establert. Aquestes vàlvules són anomenades vàlvules d'alleujament de pressió i temperatura . Las válvulas de alivio de presión, también llamadas válvulas de seguridad o válvulas de alivio (son elementos distintos, favor revisar norma ASME de elementos de sobrepresión para recipientes) , están diseñadas para aliviar la presión cuando un fluido supera un límite preestablecido (presión de trabajo). Su misión es evitar la explosión del sistema protegido o el fallo de un equipo o tubería por un exceso de presión. Existen también las válvulas que alivian la presión de un fluido cuando la temperatura (y por lo tanto, la presión) supera un límite establecido por el fabricante. Pojistný ventil je zařízení, které při překročení nastaveného přetlaku automaticky otevře a tím odvede médium mimo chráněné zařízení. Odpouští se většinou do volného prostoru, hořlavé plyny do bezpečného prostoru, zemní plyn např. nad střechu budovy. Používá se na tlakových nádobách, kotlích, v topných systémech, ohřívačích, a všech systémech, které je třeba chránit před nárůstem tlaku. Sicherheitsventile (Überdruckventile) gehören zu den Sicherheitsarmaturen nach DIN EN 806-1 bzw. DIN 3211 und schützen druckbeaufschlagte Räume oder Druckbehälter (z. B. Heiz- und Dampfkessel, Rohrleitungen, Reaktoren) vor einem für Druckgerät oder Drucksystem unzulässigen Druckanstieg. Bei Überschreiten des Ansprechdruckes werden Gase, Dämpfe oder Flüssigkeiten in die Atmosphäre oder in Sammelrohrleitungen abgeleitet. Ein Beispiel ist das Kesselsicherheitsventil einer Dampflokomotive. In R&I-Fließschemata nach internationalem Standard erfolgt die Kennzeichnung eines Drucksicherheitsventils mit PSV (Pressure Safety Valve) mit einer folgenden Zählnummer. Предохранительный клапан — трубопроводная арматура, предназначенная для защиты от механического разрушения оборудования и трубопроводов избыточным давлением путём автоматического выпуска избытка жидкой, паро- и газообразной среды из систем и сосудов с давлением сверх установленного. Клапан также должен обеспечивать прекращение сброса среды при восстановлении рабочего давления. Предохранительный клапан является арматурой прямого действия, работающей непосредственно от рабочей среды, наряду с большинством конструкций защитной арматуры и регуляторами давления прямого действия. Опасное избыточное давление может возникнуть в системе как в результате сторонних факторов (неправильная работа оборудования, передача тепла от сторонних источников, неправильно собранная тепломеханическая схема и т. д.), так и в результате внутренних физических процессов, обусловленных неким исходным событием, не предусмотренным нормальной эксплуатацией. Предохранительные клапаны устанавливаются везде, где может это произойти, то есть практически на любом оборудовании, но в особенности они важны в сфере эксплуатации промышленных и бытовых сосудов, работающих под давлением. Существуют и другие виды предохранительной арматуры, но клапаны используются наиболее широко вследствие простоты своей конструкции, лёгкости настройки, разнообразия видов, размеров и конструктивных исполнений. En säkerhetsventil är en ventil med en fjäder. Om trycket når det ventilen konstruerats för, eller ställts in på, så öppnas ventilen och släpper ut övertrycket. Zawór bezpieczeństwa (klapa, klapa bezpieczeństwa) – zawór otwierający się samoczynnie w chwili gdy ciśnienie gazu (pary) przekroczy dopuszczalną wartość co zapobiega eksplozji kotła, zbiornika, rurociągu itp. Po raz pierwszy zastosował go Denis Papin w zbudowanym w 1681 szybkowarze. W najprostszym wykonaniu jest to płytka łamliwa ulegająca zniszczeniu. Zapieczenie zaworu bezpieczeństwa, lub jego dodatkowe dociążenie było jedną z przyczyn eksplozji kotłów, dlatego czasem stosowano dwa niezależne zawory. Zawór bezpieczeństwa był montowany rutynowo w parowozach i uniemożliwiał niebezpieczne podniesienie ciśnienia, które mogłoby grozić eksplozją. Obecnie zawory bezpieczeństwa są to zawory przelewowe nastawiane na maksymalną dopuszczalną wartość ciśnienia w . صمام الأمان هو صمام له آلية عمل تقوم بشكل آلي تلقائي بتحرير المواد مثل البخار من المرجل (الغلاية) أو أي وعاء ضغط أو أي أنظمة أخرى وذلك عندما يتجاوز الضغط أو درجة الحرارة الحد المعطى له.
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