P/EB

P/EB

Pressure Relief Valve
deflagration- and endurance burning-proof

Function and Description

The deflagration-proof and endurance burning-proof P/EB type PROTEGO® valve is a highly developed pressure relief valve with an integrated flame arrester unit. It is primarily used as a device for flame transmission-proof out-breathing on tanks, containers, and process equipment. The valve offers reliable protection against overpressure and prevents product losses almost up to the set pressure, while at the same time protecting against atmospheric deflagration as well as endurance burning. The PROTEGO® flame arrester unit is designed to achieve minimum pressure losses with maximum safety. The PROTEGO® P/EB valve is available for substances in explosion group IIA (NEC group D MESG > 0.90 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 above the normal standards due to our state-of-the-art manufacturing technology. This feature isensured 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 them from sticking when sticky substances are used and to enable the use in 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 in 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 12874, as well as other international standards.

Features and Advantages

  • 10% technology for minimum pressure increase up to full lift
  • extreme tightness, resulting in lowest possible product losses and reduced 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 atmosphere in accordance with ATEX
  • 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 individal FLAMEFILTER® discs and valve pallet

Dimensions

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

DN 50 / 2" 50 / 2" 80 / 3"80 / 3"
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.
a218 / 8.58218 / 8.58218 / 8.58218 / 8.58
b287 / 11.30452 / 17.80289 / 11.38454 / 17.87
DN 50 / 2" 50 / 2" 80 / 3"80 / 3"
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.
a218 / 8.58218 / 8.58218 / 8.58218 / 8.58
b287 / 11.30452 / 17.80289 / 11.38454 / 17.87

Dimensions in mm / inchesDimensions for Pressure Relief Valve with heating jacket upon request

P/EB
Detail X
Detail X

Material selection for housing

Design
BC
HousingSteelStainless Steel
Heating jacket (P / EB-H-...)SteelStainless Steel
Valve seatStainless SteelStainless Steel
Weather hoodSteelStainless Steel
Design
BC
HousingSteelStainless Steel
Heating jacket (P / EB-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/EB
Detail X
Detail X

Selection of explosion group

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

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

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/EB - –

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

P/EB - H

Pressure relief valve, basic design

P/EB - –

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

P/EB - 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/EB
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”.

P/EB
Detail X
Detail X
P/EB
Detail X
Detail X