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PV/EB-E

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

  • excellent tightness, resulting in lowest possible product losses and reduced environmental pollution
  • set pressure close to opening pressure for optimum pressure maintenance in the system
  • valve opens later and closes earlier than conventional valves
  • valve pallet is guided inside the housing to protect against harsh weather conditions
  • can be used as a protective system in areas with potentially explosive atmospheres in accordance with ATEX
  • protected against deflagration and endurance burning of alcohol/air mixtures from explosion group IIB1
  • PROTEGO® flame arrester unit provides protection against atmospheric deflagrations and endurance burning
  • integrated PROTEGO® flame arrester unit is saves space and weight and reduces costs
  • PROTEGO® flame arrester unit is protected from clogging and sticky substances caused by product vapors
  • minimum pressure loss of the PROTEGO® flame arrester unit
  • flameproof condensate drain
  • maintenance-friendly design
  • modular design enables replacement of individual FLAMEFILTER® discs and valve pallets
  • available in a special design with lifting device

Función y Descripción

The deflagration-proof and endurance burning-proof PV/EB-E type PROTEGO® valve is a highly developed combined pressure/vacuum relief valve for high flow capacities with an integrated flame arrester unit that is specifically designed for use in ethanol production, processing, and storage. It is primarily used as a device for flame transmission-proof in-breathing and out-breathing on tanks, containers, and process equipment. The valve offers reliable protection against overpressure and vacuum, prevents the in-breathing of air and product losses almost up to the set pressure, and protects against atmospheric deflagration and as endurance burning if stabilized burning occurs. The PROTEGO® flame arrester unit is designed to achieve minimum pressure drop with maximum safety. The PROTEGO® PV/EB-E valve is available for substances from explosion group IIB1 (MESG ≥ 0.85 mm) and provides specific protection against deflagration and endurance burning of alcohol/air mixtures (such as ethanol/air).

The valve functions proportionally, so the set pressures should be selected in relation to the proportional behavior (such as a 10%, 40%, or 100% overpressure from the set pressure to the relieving pressure at which the required flow performance is reached).

The tank pressure is maintained up to the set pressure with a tightness that is above the normal standards 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 high quality FEP diaphragm. 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 is released, the valve re-seats and provides a tight seal.

If the set pressure is exceeded, gas/product vapor/air mixtures are released into the atmosphere. If this mixture ignites, the integrated PROTEGO® flame arrester unit (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 of endurance burning. The valve is protected and also fulfils its function under these severe conditions. The spring-loaded weather hood opens as soon as the melting element (4) melts.

The valve can be used at an operating temperature of up to +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.

Dimensiones

To select the nominal size (DN), please use the flow capacity charts on the following pages

DN 50 / 2" 50 / 2" 80 / 3" 80 / 3"
DN2"2"3"3"
Set pressure≤ +60 mbar> +60 mbar≤ +60 mbar> +60 mbar
Set pressure≤ +24.1 inch W.C.> +24.1 inch W.C.≤ +24.1 inch W.C.> +24.1 inch W.C.
a308 / 12.13443 / 17.44308 / 12.13443 / 17.44
b108 / 4.25108 / 4.25108 / 4.25108 / 4.25
c165 / 6.50165 / 6.50167 / 6.57167 / 6.57
d218 / 8.58218 / 8.58218 / 8.58218 / 8.58
Dimensiones en mm / pulgadas Dimensions for pressure/ vacuum relief valve with heating jacket upon request

Selección de materiales para la vivienda

Design  BC
HousingSteelStainless Steel
Heating jacket(PV / EB-E-H-...)SteelStainless Steel
Valve seatStainless SteelStainless Steel
Weather hoodSteelStainless Steel
Special materials upon request

Combinación de materiales para la unidad apagallamas

Design A
FLAMEFILTER® cageStainless Steel
FLAMEFILTER®Stainless Steel
SpacerStainless Steel
Special materials upon request

Selección de materiales para la válvula de presión

Design  ABCD
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 +210
>+5.6 up to +84
>+35 up to +210
>+14 up to +84
Valve palletAluminiumStainless SteelStainless SteelStainless Steel
SealingFEPFEPMetal to MetalPTFE
Special material as well as higher set pressure upon request

Selección de materiales para la válvula de vacío

Design ABCD
Vacuum range [mbar]
[inch W.C.]
-3.5 up to -5.0
-1.4 up to -2.0
<-5.0 up to -14
<-2.0 up to -5.6
<-14 up to -35
<-5.6 up to -14
<-14 up to -35
<-5.6 up to -14
Valve palletAluminiumStainless SteelStainless SteelStainless Steel
SealingFEPFEPMetal to MetalPTFE
Special material as well as higher set vacuum upon request

Selección del grupo de explosión

MESGExpl. Gr. (IEC / CEN)Gas Group (NEC)
≥ 0,85 mmIIB1
Special approvals upon request

Tipo de bridas de conexión

EN 1092-1; Form B1
ASME B16.5 CL 150 R.F.
other types upon request

Modelo y especificación

Almost any combination of vacuum and pressure levels can be set for the valve. The valve discs are weight loaded. When the difference between the pressure and vacuum exceeds 150 mbar / 60.2 inch W.C., special valve discs are used.
There are two different designs:

Pressure/vacuum relief valve, basic design

PV/EB-E- –

Pressure/vacuum relief valve with heating jacket (max. heating fluid temperature +85°C / 185°F)

PV/EB-E- H

Additional special devices available upon request

Settings

Pressure: +2.0 mbar +210 mbar
+0.8 inch W.C. +84 inch W.C.
Vacuum: -14 mbar -35 mbar
-5.6 inch W.C. -14 inch W.C.
Vacuum: -3.5 mbar -14 mbar
-1.4 inch W.C. -5.6 inch W.C.
for presssure up to max. + 150 mbar / 60.2 inch W.C.
Higher and lower settings upon request

Diagrama de flujo volumétrico

Los diagramas de flujo volumétrico han sido determinados con un banco de pruebas de caudal calibrado y certifi - cado por TÜV. El flujo volumétrico V. en [m³/h] y el CFH se refi eren a las condiciones estándar de referencia de aire según ISO 6358 (20°C, 1bar). La conversión a otras densidades y temperaturas están referidas en el Vol. 1: “Fundamentos Técnicos”.