P/EBR-E

P/EBR-E

Pressure Relief Valve

deflagration- and endurance burning-proof

Function and Description

The deflagration proof and endurance burning proof P/EBR-E type PROTEGO® valve is a highly developed pressure relief valve for large flows with an integrated flame arrester unit that is specially used for applications handling ethanol. It is primarily used as a safety device for flame transmission proof outbreathing on tanks, containers and process engineering apparatus. The valve offers reliable protection against excess pressure and prevents product losses almost up to the set pressure; it 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 P/EBR-E valve is available for substances of 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 proportional, so the set pressures should be selected in relation to the proportional behaviour (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 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 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 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 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 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.

Features and Advantages

  • selecting set pressure close to relieving pressure results in product loss reduction
  • 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 of alcohol/ air mixtures from explosion group IIB1
  • high flow capacity through large flame filter cross-section, results in low pressure drop
  • PROTEGO® flame arrester unit provides protection against atmospheric deflagration and endurance burning
  • flame arrester unit 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 FLAMEFILTER® and valve pallets to be replaced

Dimensions

To select the nominal size (DN), please use the flow capacity chart on the following page

DN 80 / 3" 80 / 3" 100 / 4" 100 / 4"
Set pressure≤ +80 mbar> +80 mbar≤ +80 mbar> +80 mbar
Set pressure≤ +32.1 inch W.C.> +32.1 inch W.C.≤ +32.1 inch W.C.> +32.1 inch W.C.
a353353353353
b345505345505
DN 80 / 3" 80 / 3" 100 / 4" 100 / 4"
Set pressure≤ +80 mbar> +80 mbar≤ +80 mbar> +80 mbar
Set pressure≤ +32.1 inch W.C.> +32.1 inch W.C.≤ +32.1 inch W.C.> +32.1 inch W.C.
a353353353353
b345505345505

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

P/EBR-E

Detail X

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Material selection for housing

Design BC
HousingSteelStainless Steel
Heating jacket (P / EBR-E-H-...)SteelStainless Steel
Valve seatStainless SteelStainless Steel
Weather hoodSteelStainless Steel
Design BC
HousingSteelStainless Steel
Heating jacket (P / EBR-E-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 valve pallet

Design ABCD
Pressure 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 +210
>+5.6 up to +84
>+14 up to +210
 >+5.6 up to +84
Valve palletAluminiumStainless SteelStainless SteelStainless Steel
SealingFEPFEPMetal to MetalPTFE
Design ABCD
Pressure 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 +210
>+5.6 up to +84
>+14 up to +210
 >+5.6 up to +84
Valve palletAluminiumStainless SteelStainless SteelStainless Steel
SealingFEPFEPMetal to MetalPTFE

Special materials and higher pressure settings upon request

P/EBR-E

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Selection of explosion group

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

Special approvals upon request

Flange connection type

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

Design Types and Specifications

The valve disc is weight-loaded. At set pressure >80 mbar (32.1 inch W.C.), an elongated design is used
There are two different designs:

Pressure relief valve, basic design

P/EBR - E - –

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

P/EBR - E - H

Pressure relief valve, basic design

P/EBR - E - –

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

P/EBR - E - H

Additional special devices available upon request

Settings

Pressure:

+3.5 mbar

+210 mbar

+1.4 inch W.C.

+84 inch W.C.

Higher pressure settings upon request.

P/EBR-E

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). Conversion to other densities and temperatures refer to Vol. 1: “Technical Fundamentals”.

P/EBR-E

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P/EBR-E

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