VD/SV-HRL
Válvula de alívio de pressão e vácuoà prova de deflagração e combustão contínua
Features
10% Technology
for minimum pressure increase up to full
lift
Lift
Lift is the actual travel of the valve pallet from the main valve out of the closed position.
Extreme Tightness
resulting in lowest possible
product
Product
Includes equipment, protective systems, devices, components and combinations of these.
losses and reduced environmental pollution
Optimum Pressure Maintenance
based on
10% technology
,
set pressure
Set pressure
Set pressure is the gauge pressure at the device inlet at which the relief device is set to start opening under service conditions.
is close to opening pressure for optimum pressure
maintenance
Maintenance
Combination of all technical and administrative actions, including supervision actions, intended to maintain or restore a unit in working order.
in the system as compared to conventional 40% or 100% technology
More Efficient Opening and Closing
valve opens later and closes earlier than conventional valves
Guided Valve Pallet
valve pallet
Valve pallet
Valve pallet is the generic term for the assembly that rests on the valve seat.
is guided inside the
housing
Housing
A housing is a solid shell, which surrounds a content, either protecting the content from external influences, or protecting the environment from the content.
to protect against harsh weather conditions
Protective System According to ATEX
can be used as a
protective system
Protective system
All devices, with the exception of components (see A.6) of the equipment, intended to immediately stop explosions and/or to limit the area affected by an explosion and separately placed on the market as autonomous systems.
in areas with potentially
explosive atmosphere
Explosive atmosphere
A mixture of air and flammable substance in the form of gases,
vapors, mists or dusts under atmospheric conditions in which, after ignition, spreads to the entire unburned mixture.
in accordance with ATEX
Safety Against Endurance Burning
Protection against Atmospheric Deflagration and Endurance Burning
Intergrated Flame Arrester
integrated
PROTEGO® flame arrester unit
PROTEGO® flame arrester unit
The PROTEGO® flame arrester unit is the main component of a flame arrester. It prevents flame propagation.
saves space and weight and reduces costs
Modular Design
allows replacement and cleaning of single FLAMEFILTER®
Function and Description
combined pressure and vacuum relief valve
The atmospheric
deflagration
Deflagration
Explosion propagating at subsonic velocity (EN 1127-1:1997).
and
endurance burning
Endurance burning
Stabilized burning for an unlimited time.
-proof VD/SV-HRL type PROTEGO® valve is a highly developed combined
pressure/vacuum relief valve
Pressure/vacuum relief valve
Pressure/vacuum relief valve is an umbrella term that includes pressure or vacuum relief valve as well as pressure and vacuum relief valve.
for high flow capacities with an integrated flame arrester. It is primarily used as a
device
Device
A device is a pipe component that influences the media flow by opening, closing, or partially shutting off the flow channel or by dividing or mixing the media flow.
for flame transmission proof in-breathing and out-breathing on tanks, containers, and process
equipment
Equipment
Machines, appliances, fixed or mobile devices, control parts and accessories, and warning and prevention systems, whether separate or combined, intended for the generation, transfer, storage, measurement, control, and conversion of energy, and for the processing of materials, which have their own potential source of ignition and may cause an explosion.
. The valve offers reliable protection against
overpressure
Overpressure
Overpressure refers to an increase in pressure in a system or vessel above the normal operating pressure.
and
vacuum
Vacuum
Vacuum is the pressure in an enclosed space that is lower than the ambient pressure.
, prevents the in-breathing of air and product losses almost up to the set pressure, and protects against atmospheric eflagration and endurance burning if
stabilized burning
Stabilized burning
Steady burning of a flame stabilized at, or close to the flame arrester element.
occurs.
10%-Technology
The PROTEGO® flame arrester unit is designed to achieve minimum pressure drop with maximum safety. The PROTEGO® VD/SV-HRL device is available for substances of
explosion
Explosion
Abrupt oxidation or decomposition reaction producing an increase in temperature, pressure, or in both simultaneously.
group IIA (NEC group D MESG > 0.9 mm).
When the set pressure is reached, the valve starts to open and reaches full lift within 10% overpressure. This unique 10% technology enables a set pressure that is only 10% below the maximum allowable working pressure (MAWP) or maximum allowable working vacuum (MAWV) of the tank. After years of development, this typical opening characteristic of a safety relief valve is now also available for the low pressure range.
advanced manufacturing technology
The
tank pressure
Tank pressure
Tank pressure is the pressure within a tank.
is maintained up to the set pressure with a tightness that is above The normal standards due to our tate-of-the-art manufacturing technology. This feature is ensured by valve seats made of high quality stainless steel and with individually lapped valve pallets (1), or with an air cushion
seal
Seal
A seal prevents or limits unwanted transfer of product from one container to another. Seal is used as superordinate term for all types of sealing elements.
(2), in conjunction with high quality FEP
diaphragm
Diaphragm
A diaphragm is a thin layer of material, which has a large surface area.
. The valve pallets are also available with a PTFE seal to prevent them from sticking when sticky substances are used and to enable the use of corrosive fluids. After the overpressure s released, the valve re-seats and provides a tight seal.
Main component - PROTEGO® flame arrester
If the set pressure is exceeded, explosive gas/product vapor/air mixtures are released into the atmosphere. If this mixture ignites, the integrated PROTEGO® flame arrester unit (3) revents flame transmission into the tank. If additional mixture continues to flow and stabilized occurs, the integrated flame arrester prevents
flashback
Flashback
Phenomenon occurring in a flammable mixture of air and gas when the local velocity of the combustible mixture becomes less than the flame velocity, causing the flame to travel back to the point of mixture.
as a result of endurance burning. The valve is protected and also fulfils its function under thesesevere conditions. The
spring
Spring
A spring is a spiral of wire which returns to its original shape after it is pressed or pulled.
-loaded
weather hood
Weather hood
A weather hood is a cover to protect the internal components of a device from environmental influences.
opens as soon as the
melting element
Melting element
The melting element is a component that consists of a housing with a lower and upper part.
(4) melts.
Many Individual Certifications
The valve can be used at an
operating temperature
Operating temperature
Temperature reached when the equipment is operating under design conditions.
of up to +60°C /140°F and meets he requirements of European tank design standard EN 14015 (Appendix L) and ISO 28300 (API 2000).
EU conformity according to the currently valid ATEX directive. Approvals according to other national/international regulations on request.
Product Data and Features
Tabela de dimensões
Para escolher o diâmetro nominal (DN), veja os diagramas de vazão nas páginas seguintes
| DN | 100 / 4" | 150 / 6" |
| a | 650 | 760 |
| b | 1000 | 1155 |
| c | 600 | 600 |
Dimensões em mm
Seleção do grupo de explosão
| MESG | Gr. expl. (IEC / CEN) | Grupo gás (NEC) |
| > 0,90 mm | IIA | D |
Aprovações especiais sob solicitação
Tipo de conexão flangeada
| EN 1092-1; Form B1 |
| ASME B16.5 CL 150 R.F. |
Outras conexões sob solicitação
Versão e especificação
Quase todas as faixas de pressão e vácuo da válvula podem ser combinadas livremente.Os obturadores da válvula são calibrados por peso.
Válvula de alívio de pressão e vácuo na versão básicaVD/SV-HRL
Outros dispositivos especiais sob solicitação
Ajustes de pressão
| Pressão: | +3.5 mbar | +35 mbar |
| +1.4 inch W.C. | +14 inch W.C. | |
| Vácuo: | -2.0 mbar | -35 mbar |
| -0.8 inch W.C. | -14 inch W.C. |
Ajustes de pressão mais altos ou baixos sob solicitação
Seleção do material do corpo
| Execução | A | B |
| Corpo | Aço | Aço inoxidável |
| Sedes de válvulas | Aço inoxidável | Aço inoxidável |
| Vedação | PTFE | PTFE |
| Tampa | Aço | Aço inoxidável |
| Conjuntos abafadores de chamas | A, B | B |
Materiais especiais sob solicitação
Combinações de material do conjunto abafador de chamas
| Execução | A | B |
| Armação do FLAMEFILTER® | Aço | Aço inoxidável |
| FLAMEFILTER® | Aço inoxidável | Aço inoxidável |
Materiais especiais sob solicitação
Seleção do material do disco da válvula de pressão
| Execução | A | B | C | D |
| Faixa de pressão [mbar] | +3,5 até +5 | >+5,0 até +14 | >+14 até +35 | >+14 até +35 |
| Obturador da válvula | Alumínio | Aço inoxidável | Aço inoxidável | Aço inoxidável |
| Vedação | FEP | FEP | metálica | PTFE |
Materiais especiais, bem como pressões maiores, sob solicitação
Seleção do material do disco da válvula de vácuo
| Execução | A | B | C | D |
| Faixa de pressão [mbar] | -2,0 até -3,5 | <-3,5 até -14 | <-14 até -35 | <-14 até -35 |
| Obturador da válvula | Alumínio | Aço inoxidável | Aço inoxidável | Aço inoxidável |
| Vedação | FEP | FEP | metálica | PTFE |
Materiais especiais, bem como vácuos maiores, sob solicitação
Diagrama de vazão
Este diagrama de vazão foi determinado em uma bancada de medição de vazão calibrada e certificada pela TÜV. A vazão V em m³/h se refere ao estado técnico padrão de ar, conforme ISO 6358 (20°C, 1bar). Para conversão em outras densidades e temperaturas, veja o cap. 1: Bases técnicas.
Detalhe X
Detalhe X
Applications