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PROTEGO
Excellence in Safety and Environment

VD/SV-PA(L)

Válvula de alívio de pressão e vácuocom bocal de conexão para o tubo coletor de escape

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
Flow Capacity
optimized flow capacity
Used in Explosion Hazardous Areas
can be used in explosion Explosion Abrupt oxidation or decomposition reaction producing an increase in temperature, pressure, or in both simultaneously. hazardous areas
Condensate Drainage
automatic condensate drain
API Tanks
best technology for API tanks
Function and Description

Combined Pressure and Vacuum Relief Valve

The VD/SV-PA(L) type PROTEGO® valve is a highly developed pressure and vacuum relief valve Pressure and vacuum relief valve A pressure and vacuum relief valve is a pressure equalization valve for impermissible pressure and vacuum in a closed system. with excellent flow performance. Typically, the valve is installed in the in-breathing and out-breathing lines of tanks, vessels, 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. to protect against unallowable overpressure Overpressure Overpressure refers to an increase in pressure in a system or vessel above the normal operating pressure. and underpressure. The valve prevents emission losses almost up to the set pressure and prevents air intake almost up to the set vacuum Set vacuum Internal negative gauge pressure at which a vacuum valve first opens. . The product vapors can be released through a collective line connected to the line flange on the pressure side.

Full Lift Technology

The 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. will start to open as soon as the set pressure is reached and only requires 10% overpressure to full lift. Continuous investments in and a commitment to research and development have allowed PROTEGO® to develop a low pressure valve which has the same opening characteristic as a high pressure safety relief valve. This “full lift type” technology allows the valve to be set at just 10% below the maximum allowable working pressure or vacuum Vacuum Vacuum is the pressure in an enclosed space that is lower than the ambient pressure. (MAWP or MAWV) of the tank and still safely vent the required mass flow. The opening characteristic is the same for pressure and vacuum relief. Due to our highly developed manufacturing technology, the tank pressure Tank pressure Tank pressure is the pressure within a tank. is maintained up to set pressure with a tightness that is far superior to the conventional standard.

Advanced Manufacturing Technology

This feature is valve seats made of high quality stainless steel and achieved by valve seats made of high quality stainless steel and with precisely 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 the valve pallets from sticking when sticky products are used and to enable the use of corrosive substances. After the excess pressure is released or the vacuum is balanced, the valve reseats and provides a tight seal. The optimized fluid dynamic design of the valve body and valve pallet Valve pallet Valve pallet is the generic term for the assembly that rests on the valve seat. is a result of many years of research, resulting in a stable operation of the valve pallet, optimized performance, and reduced product losses.
Product Data and Features

Tabela de dimensões

Para escolher o diâmetro nominal (DN), veja os diagramas de vazão nas páginas seguintes

VD / SV-PA
DN 150 / 2"80 / 3"100 / 4"150 / 6"200 / 8"250 / 10"300 / 12"
DN 250 / 2"80 / 3"100 / 4"150 / 6"200 / 8"250 / 10"300 / 12"
a40548060080592510101010
b390485550660780875875
c150180200250300305305
d240300330390480555582
e165192240350390460460
VD / SV-PAL
DN 150 / 2"80 / 3"100 / 4"150 / 6"200 / 8"250 / 10"300 / 12"
DN 280 / 3"100 / 4"150 / 6"200 / 8"250 / 10"300 / 12"350 / 14"
a39544556577089510101010
b400485550655775875885
c140143165216267305305
d255308355417505582603
e165192240350390460460

Dimensões em mm

Dimensões para a válvula de alívio de pressão e vácuo com camisa de aquecimento sob solicitação

Seleção do material do corpo

Execução ABC
Corpo Alumínio Aço Aço inoxidável
Camisa de aquecimento (VD / SV-PA(L)-H-...)– Aço Aço inoxidável
Sedes de válvulas Aço inoxidável Aço inoxidável Aço inoxidável
Vedação WS 3822 WS 3822PTFE

Os corpos também podem ser fornecidos com revestimento de ECTFE

Materiais especiais sob solicitação

Seleção do material do disco da válvula de pressão

Execução ABCDEF
Faixa de pressão [mbar]
+2,0 até +3,5>+3,5 até +14>+14 até +35>+35 até +60>+14 até +35>+35 até +60
Obturador da válvula Alumínio Aço inoxidável Aço inoxidável Aço inoxidável Aço inoxidável Aço inoxidável
VedaçãoFEPFEP metálica metálicaPTFEPTFE

Materiais especiais e ajustes de pressão mais altos sob solicitação

Seleção do material do disco da válvula de vácuo

Execução ABCDEF
Faixa de pressão [mbar]
-2,0 até -3,5<-3,5 até -14<-14 até -35<-14 até -35<-35 até -60<-35 até -60
Obturador da válvula Alumínio Aço inoxidável Aço inoxidável Aço inoxidável Aço inoxidável Aço inoxidável
VedaçãoFEPFEP metálica metálicaPTFEPTFE

Materiais especiais e ajustes de vácuo mais altos 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

Os obturadores de válvula são calibrados por peso. Para pressões de ajuste mais altas está disponível, sob solicitação, uma versão especial calibrada por mola. A versão (L) deve ser escolhida quando o bocal de conexão para o tubo coletor de escape é um diâmetro nominal maior que o diâmetro nominal do bocal do tanque.
Estão disponíveis quatro versões:
Válvula de alívio de pressão e vácuo na versão básicaVD/SV-PA - -
Válvula de alívio de pressão e vácuo com camisa de aquecimentoVD/SV-PA - H
Válvula de alívio de pressão e vácuo com DN2 > DN1VD/SV-PAL - -
Válvula de alívio de pressão e vácuo com DN2 > DN1 e camisa de aquecimentoVD/SV-PAL - H

Outros dispositivos especiais sob solicitação.
As faixas de pressão e vácuo podem ser combinadas quase livremente. Se a diferença entre pressão e vácuo excede 150 mbar, se usa obturadores especiais.

Ajustes de pressão

Pressão:+2.0 mbar+60 mbar
+0.8 inch W.C.+24 inch W.C.
Vácuo:-2.0 mbar-60 mbar
-0.8 inch W.C.-24 inch W.C.

Ajustes de pressão mais altos ou baixos 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