VD-SV-EB

VD-SV-EB

Pressure/Vacuum Relief Valve deflagration- and endurance burning-proof

Função e descrição

The deflagration-proof and endurance burning-proof VD-SV-EB type PROTEGO® valve is a highly developed combined pressure/ vacuum relief valve for high flow capacities with the integrated flame arrester PROTEGO® EB. It is primarily used as a safety device for flame-transmission-proof in- and outbreathing in tanks, containers and process engineering apparatus. The valve offers reliable protection against excess pressure and vacuum, preventing outbreathing of product vapour and inbreathing of air almost up to the set pressure and also protects against atmospheric deflagration as well as endurance burning if stabilized burning occurs. The PROTEGO® flame arrester unit is designed to achieve minimum pressure drop with maximum safety. The deflagration and endurance burning proof PROTEGO® VD-SV-EB device is available for substances of explosion 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) 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.

The tank pressure is maintained up to the set pressure with a tightness that is far superior to the conventional standard due to our state of the art manufacturing technology. This feature is ensured by the valve seats made of high quality stainless steel and with individually lapped valve pallets (1) or with an air cushion seal (2) in conjunction with a high quality FEP diaphragm. 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 in corrosive fluids. After the excess pressure is discharged, the valve reseats and provides a tight seal.

If the set pressure is exceeded, explosive gas/product-vapour air mixtures are released to the atmosphere. If this mixture ignites, the integrated flame arrester PROTEGO® EB (3) prevents flame transmission into the tank. If additional mixture continues to flow and stabilized burning occurs, the integrated flame arrester unit prevents flashback as a result from endurance burning. The valve is protected and also fulfils its function under this severe service conditions. The spring loaded weather Hood opens as soon as the fusible element (4) melts.

The valve can be used up to an operating temperature of +60°C / 140°F and meets the requirements of European tank design standard EN 14015 – Appendix L and ISO 28300 (API 2000).

Type-approved in accordance with the current ATEX Directive and EN ISO 16852 as well as other international standards.

Características especiais e vantagens

  • requires only 10% overpressure to full lift for explosion Group IIA (NEC group D) vapours
  • through 10% technology higher set pressures can be used which results in product loss reduction compared to conventional 40% and 100% overpressure technology vents (compare API 2000)
  • more design flexibility through higher reseating pressures; vents reseat when conventional vent is still discharging costly product or nitrogen
  • the valve disc is guided within the housing to protect against harsh weather conditions
  • high performance seal reducing product loss below EPA’s 500ppm rule preventing environmental pollution
  • can be used as protective system according to ATEX in areas subject to explosion hazards
  • safe against deflagration and endurance burning for Explosion group IIA (NEC group D) vapours
  • high flow capacity through large FLAMEFILTER® crosssection, results in low pressure drop
  • FLAMEFILTER® provides protection against atmospheric deflagration and endurance burning
  • FLAMEFILTER® integrated into the valve saves space, weight and reduces cost
  • FLAMEFILTER® protected from clogging caused by product vapours
  • flame transmission proof condensate drain
  • maintenance friendly design
  • modular design enables individual FLAMEFILTERS® and valve pallets to be replaced

Tabela de dimensões

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

DN DN2 a b c d e f g
150 / 6“ 400 / 16“ 705 / 27.76 844 / 33.23 802 / 31.57 957 / 37.68 235 / 9.25 1500 / 59.06 109 / 4.29
200 / 8“ 400 / 16“ 705 / 27.76 939 / 36.97 802 / 31.57 1027 / 40.43 235 / 9.25 1500 / 59.06 109 / 4.29
DN DN2 a b c d e f g
150 / 6“ 400 / 16“ 705 / 27.76 844 / 33.23 802 / 31.57 957 / 37.68 235 / 9.25 1500 / 59.06 109 / 4.29
200 / 8“ 400 / 16“ 705 / 27.76 939 / 36.97 802 / 31.57 1027 / 40.43 235 / 9.25 1500 / 59.06 109 / 4.29

Dimensões em mm Dimensions for pressure valves with heating jacket upon request

VD-SV-EB
Detail X
Einzelheit X

Seleção do material do corpo

Design BC
HousingSteelStainless Steel
Heating jacket (VD-SV-EB-H-...) SteelStainless Steel
Valve seats Stainless Steel Stainless Steel
GasketPTFEPTFE
Flange ringSteel Stainless Steel
Weather hood Steel Stainless Steel
Flame arrester unitAA, B
Design BC
HousingSteelStainless Steel
Heating jacket (VD-SV-EB-H-...) SteelStainless Steel
Valve seats Stainless Steel Stainless Steel
GasketPTFEPTFE
Flange ringSteel Stainless Steel
Weather hood Steel Stainless Steel
Flame arrester unitAA, B

Special materials upon request

Combinações de material do conjunto abafador de chamas

Design   AB
FLAMEFILTER® cage Steel Stainless Steel
FLAMEFILTER® Stainless Steel Stainless Steel
Safety bar Stainless Steel Stainless Steel
Design   AB
FLAMEFILTER® cage Steel Stainless Steel
FLAMEFILTER® Stainless Steel Stainless Steel
Safety bar Stainless Steel Stainless Steel

Special materials upon request

Seleção do material do disco da válvula de pressão

Design ABCDEF
Pressure range [mbar]
[inch W.C.]
+2.0 up to +3.5
 +0.8 up to +1.4
>+3.5 up to +14
 >+1.4 up to +5.6
>+14 up to +35
 >+5.6 up to +14
>+35 up to +60
 >+14 up to +24
>+14 up to +35
 >+5.6 up to +14
>+35 up to +60
 >+14 up to +24
Valve palletAluminiumStainless SteelStainless SteelStainless SteelStainless SteelStainless Steel
SealingFEPFEPMetal to MetalMetal to MetalPTFEPTFE
Design ABCDEF
Pressure range [mbar]
[inch W.C.]
+2.0 up to +3.5
 +0.8 up to +1.4
>+3.5 up to +14
 >+1.4 up to +5.6
>+14 up to +35
 >+5.6 up to +14
>+35 up to +60
 >+14 up to +24
>+14 up to +35
 >+5.6 up to +14
>+35 up to +60
 >+14 up to +24
Valve palletAluminiumStainless SteelStainless SteelStainless SteelStainless SteelStainless Steel
SealingFEPFEPMetal to MetalMetal to MetalPTFEPTFE

Special material as well as higher set pressure upon request

Seleção do material do disco da válvula de vácuo

Design ABCDEF
Vacuum range [mbar]
[inch W.C.]
-2.0 up to -3.5
 -0.8 up to -1.4
<-3.5 up to -14
 <-1.4 up to -5.6
<-14 up to -35
 <-5.6 up to -14
<-14 up to -35
 <-5.6 up to -14
<-35 up to -60
 <-14 up to -24
<-35 up to -60
 <-14 up to -24
Valve palletAluminiumStainless SteelStainless SteelStainless SteelStainless SteelStainless Steel
SealingFEPFEPMetal to MetalPTFEMetal to MetalPTFE
Design ABCDEF
Vacuum range [mbar]
[inch W.C.]
-2.0 up to -3.5
 -0.8 up to -1.4
<-3.5 up to -14
 <-1.4 up to -5.6
<-14 up to -35
 <-5.6 up to -14
<-14 up to -35
 <-5.6 up to -14
<-35 up to -60
 <-14 up to -24
<-35 up to -60
 <-14 up to -24
Valve palletAluminiumStainless SteelStainless SteelStainless SteelStainless SteelStainless Steel
SealingFEPFEPMetal to MetalPTFEMetal to MetalPTFE

Special material as well as higher set pressure upon request

VD-SV-EB
Detail X
Einzelheit X

Seleção do grupo de explosão

MESGExpl. Gr. (IEC / CEN)Gas Group (NEC)
> 0,90 mmIIAD
MESGExpl. Gr. (IEC / CEN)Gas Group (NEC)
> 0,90 mmIIAD

Special approvals upon request

Tipo de conexão flangeada

EN 1092-1; Form B1
ASME B16.5; 150 lbs RFSF
EN 1092-1; Form B1
ASME B16.5; 150 lbs RFSF

other types upon request

Versão e especificação

Any combination of vacuum and pressure levels can be set for the valve
The valve discs are weight-loaded.
Pressure/vacuum relief valve, basic design

VD-SV-EB - –

Pressure/vacuum relief valve, with heating jacket

VD-SV-EB - H

Pressure/vacuum relief valve, basic design

VD-SV-EB - –

Pressure/vacuum relief valve, with heating jacket

VD-SV-EB - H

Outros dispositivos especiais sob solicitação

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.
Higher and lower settings upon request
VD-SV-EB
Detail X
Einzelheit X

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.

VD-SV-EB
Detail X
Einzelheit X
VD-SV-EB
Detail X
Einzelheit X