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PROTEGO®
Excellence in Safety and Environment

PROTEGO®
Breather Valves

A row of large red industrial vent valves sits atop blue piping and handwheels on an outdoor platform under a clear blue sky.

Reduction of Vapour Emissions & Safe Plant Operation

In closed containers or tanks, managing pressure is crucial. PROTEGO® Pressure and Vacuum Vacuum Vacuum is the pressure in an enclosed space that is lower than the ambient pressure. Relief Valves ensure safe operations by releasing accumulated pressure and compensating for vacuum conditions. Designed for processes like loading, unloading, steam cleaning, and thermal effects, they function as pressure relief, vacuum relief, or combined valves. 

Trusted by industries such as oil and gas, chemical, pharmaceutical, and bio-energy, PROTEGO® valves ensure safety and efficiency with innovative design and superior performance.

Pressure and Vacuum Relief Valves

Pressure and Vacuum Relief Valves with Flame Arrester

Emergency Relief Valves

Please select a product from our range below

Filter products
Device
Type
Place of Installation
Explosion Group
Pressure/Vacuum
Material
Size DN
Design
Heating Jacket
Horizontal / Vertical
Combustion Process
Connection Type

Pressure Relief Valve

BE/HR-D

Explosion Group

IIA1
D / IIA

Pressure Range:

2 up to 35 mbar

Pressure Relief Valve

D-SVL-EB-IIA

Explosion Group

IIA1
D / IIA

Pressure Range:

2 up to 60 mbar

Pressure Relief Valve

D/KSM

Pressure Range:

5 up to 100 mbar

Pressure or Vacuum Relief Valve

D/PA(L)

Pressure Range:

2 up to 60 mbar

Vacuum Range:

-2 up to -60 mbar

Pressure Relief Valve

D/SVL

Pressure Range:

2 up to 60 mbar

High Velocity Pressure Relief Valve

DE-S-IIC

Explosion Group

B / IIC

Pressure Range:

60 up to 350 mbar

High Velocity Pressure Relief Valve

DE/S-IIB

Explosion Group

IIA1
D / IIA
C / IIB1
C / IIB2
C / IIB3
B / IIB

Pressure Range:

100 up to 500 mbar

High Velocity Pressure Relief Valve

DE/S-IIB3

Explosion Group

IIA1
D / IIA
C / IIB1
C / IIB2
C / IIB3

Pressure Range:

100 up to 500 mbar

High Velocity Pressure Relief Valve

DE/S-MK VI - IIB3

Explosion Group

IIA1
D / IIA
C / IIB1
C / IIB2
C / IIB3

Pressure Range:

60 up to 350 mbar

Pressure and Vacuum Relief Valve, In-Line

DV/ZT

Pressure Range:

-2 up to -60 mbar

Vacuum Range:

2 up to 60 mbar

Pressure and Vacuum Relief Valve, In-Line

DV/ZT-F

Pressure Range:

-3.5 up to -50 mbar

Vacuum Range:

60 up to 500 mbar

Pressure and Vacuum Relief Valve, In-Line

DV/ZU

Pressure Range:

2 up to 60 mbar

Vacuum Range:

-3.5 up to -50 mbar

Pressure and Vacuum Relief Valve, In-Line

DV/ZU-F

Pressure Range:

60 up to 500 mbar

Vacuum Range:

-3.5 up to -50 mbar

Pressure and Vacuum Relief Valve, In-Line

DV/ZW

Pressure Range:

2 up to 60 mbar

Vacuum Range:

-3.5 up to -50 mbar

Pressure and Vacuum Relief Valve, In-Line

DV/ZW-F

Pressure Range:

-3.5 up to -50 mbar

Vacuum Range:

60 up to 500 mbar

Pressure or Vacuum Relief Valve, In-Line

DZ/E

Pressure Range:

-2 up to -60 mbar

Vacuum Range:

2 up to 60 mbar

Pressure or Vacuum Relief Valve, In-Line

DZ/E-F

Pressure Range:

60 up to 500 mbar

Vacuum Range:

-60 up to -500 mbar

Pressure or Vacuum Relief Valve, In-Line

DZ/EA

Pressure Range:

-5 up to -50 mbar

Vacuum Range:

5 up to 50 mbar

Pressure or Vacuum Relief Valve, In-Line

DZ/EA-F

Pressure Range:

-60 up to -500 mbar

Vacuum Range:

60 up to 500 mbar

Pressure or Vacuum Relief Valve, In-Line

DZ/T

Pressure Range:

2 up to 60 mbar

Vacuum Range:

-2 up to -60 mbar

Pressure or Vacuum Relief Valve, In-Line

DZ/T-F

Pressure Range:

-60 up to -500 mbar

Vacuum Range:

60 up to 500 mbar

Emergency pressure relief valve

ER-V-LP

Pressure Range:

3.4 up to 15 mbar

Emergency pressure relief valve

ER/V

Pressure Range:

5 up to 40 mbar

Pressure Relief Valve

ER/V-F

Pressure Range:

60 up to 500 mbar

Pressure Relief Valve

ER/VH

Pressure Range:

25 up to 60 mbar

Pressure Relief Valve

P/EB

Explosion Group

IIA1
D / IIA

Pressure Range:

3.5 up to 210 mbar

Pressure Relief Valve

P/EB-E

Explosion Group

IIA1
D / IIA
C / IIB1

Pressure Range:

3.5 up to 210 mbar

Pressure Relief Valve

P/EBR

Explosion Group

IIA1
D / IIA
C / IIB1
C / IIB2
C / IIB3

Pressure Range:

3.5 up to 210 mbar

Pressure Relief Valve

P/EBR-E-IIB1

Explosion Group

IIA1
D / IIA
C / IIB1

Pressure Range:

3.5 up to 210 mbar

Pressure Relief Valve

P/EBR-E-IIB3

Explosion Group

IIA1
D / IIA
C / IIB1

Pressure Range:

3.5 up to 210 mbar

Pressure Relief Valve

P/EL

Pressure Range:

3.5 up to 210 mbar

Pressure Relief Valve

P/ELR

Pressure Range:

3.5 up to 210 mbar

Pressure/Vacuum Relief Valve

PV/EB

Explosion Group

IIA1
D / IIA

Pressure Range:

-3.5 up to -35 mbar

Vacuum Range:

2 up to 210 mbar

Pressure/Vacuum Relief Valve

PV/EB-E

Explosion Group

IIA1
D / IIA
C / IIB1

Pressure Range:

2 up to 210 mbar

Vacuum Range:

-3.5 up to -35 mbar

Pressure/Vacuum Relief Valve

PV/EBR

Explosion Group

IIA1
D / IIA
C / IIB1
C / IIB2
C / IIB3

Pressure Range:

2 up to 210 mbar

Vacuum Range:

-3.5 up to -50 mbar

Pressure/Vacuum Relief Valve

PV/EBR-E-IIB1

Explosion Group

IIA1
D / IIA
C / IIB1

Pressure Range:

2 up to 210 mbar

Vacuum Range:

-3.5 up to -50 mbar

Pressure/Vacuum Relief Valve

PV/EBR-E-IIB3

Explosion Group

IIA1
D / IIA
C / IIB3

Pressure Range:

-3.5 up to -50 mbar

Vacuum Range:

2 up to 210 mbar

Pressure and Vacuum Relief Valve

PV/EL

Pressure Range:

2 up to 210 mbar

Vacuum Range:

-3.5 up to -35 mbar

Pressure and Vacuum Relief Valve

PV/ELR

Pressure Range:

2 up to 210 mbar

Vacuum Range:

-3.5 up to -50 mbar

Pressure or Vacuum Relief Valve, In-Line

R/KSM

Pressure Range:

5 up to 100 mbar

Vacuum Range:

-5 up to -100 mbar

Pressure Relief Valve

SD/BS-H

Pressure Range:

5 up to 210 mbar

Vacuum Relief Valve

SV/E

Explosion Group

IIA1
D / IIA
C / IIB1
C / IIB2
C / IIB3
B / IIB
B / IIC

Pressure Range:

-2 up to -60 mbar

Vacuum Relief Valve

SV/E-1-0

Pressure Range:

-2 up to -60 mbar

Vacuum Relief Valve

SV/T-0-H

Pressure Range:

-7 up to -50 mbar

Pressure Diaphragm Valve

UB/DF

Explosion Group

IIA1
D / IIA
C / IIB1
C / IIB2
C / IIB3

Pressure Range:

3.5 up to 140 mbar

Pressure/Vacuum Diaphragm Valve

UB/SF

Explosion Group

D / IIA
C / IIB1
C / IIB2
C / IIB3

Pressure Range:

-3.5 up to -35 mbar

Vacuum Range:

3.5 up to 140 mbar

Pressure/Vacuum Diaphragm Valve

UB/SF-G

Explosion Group

D / IIA
C / IIB1
C / IIB2
C / IIB3

Pressure Range:

-3.5 up to -3.5 mbar

Vacuum Range:

3.5 up to 140 mbar

Pressure/Vacuum Diaphragm Valve

UB/SF-IIA1

Explosion Group

IIA1

Pressure Range:

3.5 up to 150 mbar

Vacuum Range:

-3.5 up to -35 mbar

Vacuum Diaphragm Valve

UB/VF

Explosion Group

IIA1
D / IIA
C / IIB1
C / IIB2
C / IIB3

Pressure Range:

-3.5 up to -35 mbar

Vacuum Relief Valve

V/KSM

Pressure Range:

-5 up to -100 mbar

Vacuum Relief Valve

V/SV-AD-IIB3

Explosion Group

C / IIB3

Pressure Range:

-2 up to -35 mbar

Pressure/Vacuum Relief Valve

VD-SV-EB

Explosion Group

IIA1
D / IIA

Pressure Range:

-2 up to -60 mbar

Vacuum Range:

2 up to 60 mbar

Pressure and Vacuum Relief Valve

VD/KSM

Pressure Range:

5 up to 100 mbar

Vacuum Range:

-5 up to -100 mbar

Pressure and Vacuum Relief Valve

VD/KSM-PA

Pressure Range:

5 up to 100 mbar

Vacuum Range:

-5 up to -100 mbar

Pressure and Vacuum Relief Valve

VD/SV

Pressure Range:

2 up to 60 mbar

Vacuum Range:

-2 up to -60 mbar

Pressure/Vacuum Relief Valve

VD/SV-AD, VD/SV-ADL

Explosion Group

IIA1
D / IIA
C / IIB1
C / IIB2
C / IIB3

Pressure Range:

-2 up to -35 mbar

Vacuum Range:

-3.5 up to 35 mbar

Pressure/Vacuum Relief Valve

VD/SV-HR

Explosion Group

IIA1
D / IIA
C / IIB1
C / IIB2
C / IIB3

Pressure Range:

-2 up to -35 mbar

Vacuum Range:

3.5 up to 35 mbar

Pressure/Vacuum Relief Valve

VD/SV-HRL

Explosion Group

IIA1
D / IIA

Pressure Range:

3.5 up to 35 mbar

Vacuum Range:

-2 up to -35 mbar

Pressure and Vacuum Relief Valve

VD/SV-PA(L)

Pressure Range:

2 up to 60 mbar

Vacuum Range:

-2 up to -60 mbar

Pressure/Vacuum Relief Valve

VD/TS

Explosion Group

IIA1
D / IIA
C / IIB1
C / IIB2
C / IIB3

Pressure Range:

3.5 up to 50 mbar

Vacuum Range:

-2 up to -25 mbar

Vacuum Relief Valve

VN-VL-L

Pressure Range:

-2.7 up to -70 mbar

Vacuum Relief Valve

VN-VU

Pressure Range:

-2.6 up to -25 mbar

Blanketing Valve

ZM-R

Pressure Range:

up to 500 mbar

Vacuum Range:

up to -200 mbar

Highlights of PROTEGO® Breather Valves

10% Technology
(set pressure close to relieving pressure)
Extreme tightness
reduced product losses
ZETOP
Zero Emission at Tank Operating Pressure
Lifecycle confidence
with maintenance-friendly designs and global service
Stable operation
during transients
Very high flow capacity
for your operations

Zero Emissions with PROTEGO® Breather Valves

The extreme tightness of PROTEGO® Valves guarantees Zero Emission at Tank Operating Pressure.

 

Due to the highly developed manufacturing technology of PROTEGO® valves the tank pressure Tank pressure Tank pressure is the pressure within a tank. is maintained up to set pressure Set pressure Set pressure is the gauge pressure at the device inlet at which the relief device is set to start opening under service conditions. with a tightness that is far superior to the conventional standard. According to the PROTEGO® Standard PS-001 leak rates are measured at 90% of the set pressure. This testing ensures PROTEGO® Valves exceed the most stringent leakage rate requirements of EPA, API2000 and EN ISO 28300.

 

To meet the goal of emission reduction, PROTEGO® full lift Lift Lift is the actual travel of the valve pallet from the main valve out of the closed position. vents utilize 10% overpressure Overpressure Overpressure refers to an increase in pressure in a system or vessel above the normal operating pressure. technology. This technology provides very short opening and closing pressure ranges. The vent only requires 10% overpressure above the set pressure to reach full performance. The tank pressure is maintained up to just below the maximum permissible tank pressure.
PROTEGO® 10% full-lift technology vents are a major benefit to emission reduction and to safe process plant operation.

The PROTEGO® valves demonstrated outstanding zero-emission performance and helped us achieve the environmental standards required for our site.

Senior Engineer

Application Examples for PROTEGO® Breather Valves

Installations de traitement chimique et pharmaceutique

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Stockage en réservoirs

Soupapes de décharge de pression et de dépression, pare-flammes, soupapes de décharge d'urgence et soupapes pilotées pour la sécurité et la performance dans l'industrie pétrolière et gazière.
Explore more

We provide engineered safety solutions.

Get in Touch

Contact our engineers for your individual requirements.

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Picture of Mrs. Auris-Nadine Hillen
Mrs. Auris-Nadine Hillen

CSR Department

+49 (0)5307 809 108