PV/EBR

PV/EBR

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

Function and Description

The deflagration-proof and endurance burning-proof PV/EBR type PROTEGO® valve is a highly developed combined pressure/ vacuum relief valve for high flow capacities with an integrated flame arrester. 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 endurance burning if stabilized burning occurs. The PROTEGO® flame arrester unit is designed to achieve minimum pressure drop with maximum safety. PROTEGO® PV/EBR valves are available for substances from explosion groups IIA to IIB3 (NEC group D to C MESG ≥ 0.65 mm).

The valve functions proportional, 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 the valve pallets 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, explosive 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, as well as other international standards.

Features and Advantages

  • excellent tightness, resulting in lowest possible product losses and environmental pollution
  • due to 10% technology, set pressure is close to opening pressure for optimum pressure maintenance in the system as compared to conventional 40% or 100% technology
  • 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
  • high flow capacity due to larger FLAMEFILTER® cross section
  • PROTEGO®flame arrester unit provides protection against atmospheric deflagrations and endurance burning
  • integrated PROTEGO® flame arrester unit 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 pallet
  • available in a special design with lifting device

Dimensions

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

DN 80 / 3"80 / 3"100 / 4" 100 / 4"
Set pressure≤ +35 mbar> +35 mbar≤ +35 mbar> +35 mbar
Set pressure≤ +14 inch W.C.> +14 inch W.C.≤ +14 inch W.C.> +14 inch W.C.
a345 / 13.58475 / 18.70345 / 13.58475 / 18.70
b141 / 5.55141 / 5.55141 / 5.55141 / 5.55
c218 / 8.58218 / 8.58218 / 8.58218 / 8.58
d353 / 13.90353 / 13.90353 / 13.90353 / 13.90
DN 80 / 3"80 / 3"100 / 4" 100 / 4"
Set pressure≤ +35 mbar> +35 mbar≤ +35 mbar> +35 mbar
Set pressure≤ +14 inch W.C.> +14 inch W.C.≤ +14 inch W.C.> +14 inch W.C.
a345 / 13.58475 / 18.70345 / 13.58475 / 18.70
b141 / 5.55141 / 5.55141 / 5.55141 / 5.55
c218 / 8.58218 / 8.58218 / 8.58218 / 8.58
d353 / 13.90353 / 13.90353 / 13.90353 / 13.90

Dimensions in mm / inchesDimensions for pressure/ vacuum relief valve with heating jacket upon request

PV/EBR
Detail X
Detail X

Material selection for housing

Design BC
HousingSteelStainless Steel
Heating jacket (PV / EBR-H-...)SteelStainless Steel
Valve seatStainless SteelStainless Steel
Weather hoodSteelStainless Steel
Design BC
HousingSteelStainless Steel
Heating jacket (PV / EBR-H-...)SteelStainless Steel
Valve seatStainless SteelStainless Steel
Weather hoodSteelStainless Steel

Special materials upon request

Material combinations of flame arrester unit

Design A
FLAMEFILTER® cageStainless Steel
FLAMEFILTER®Stainless Steel
SpacerStainless Steel
Design A
FLAMEFILTER® cageStainless Steel
FLAMEFILTER®Stainless Steel
SpacerStainless Steel

Special materials upon request

Material selection for pressure valve pallet

Design ABCD
Presure 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
Design ABCD
Presure 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

Material selection for vacuum valve pallet

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 -50
<-5.6 up to -20
<-14 up to -50
<-5.6 up to -20
Valve palletAluminiumStainless SteelStainless SteelStainless Steel
SealingFEPFEPMetal to MetalPTFE
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 -50
<-5.6 up to -20
<-14 up to -50
<-5.6 up to -20
Valve palletAluminiumStainless SteelStainless SteelStainless Steel
SealingFEPFEPMetal to MetalPTFE

Special material as well as higher set vacuum upon request

PV/EBR
Detail X
Detail X

Selection of explosion group

MESGExpl. Gr. (IEC / CEN)Gas Group (NEC)
> 0,90 mmIIAD
≥ 0,65 mmIIB3C
MESGExpl. Gr. (IEC / CEN)Gas Group (NEC)
> 0,90 mmIIAD
≥ 0,65 mmIIB3C

Special approvals upon request

Flange connection type

EN 1092-1; Form B1
ASME B16.5 CL 150 R.F.
EN 1092-1; Form B1
ASME B16.5 CL 150 R.F.

other types upon request

Design Types and Specifications

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/EBR- –

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

PV/EBR- H

Pressure/vacuum relief valve, basic design

PV/EBR- –

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

PV/EBR- 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 -50 mbar
-5.6 inch W.C. -20 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
PV/EBR
Detail X
Detail X

Flow Capacity Chart

The flow capacity charts have been determined with a calibrated and TÜV certified flow capacity test rig. Volume flow V in (m³/h) and CFH refer to the standard reference conditions of air ISO 6358 (20°C, 1bar). For conversion to other densities and temperatures refer to Sec. 1: “Technical Fundamentals”.

PV/EBR
Detail X
Detail X
PV/EBR
Detail X
Detail X