PROTEGO® Valves

Choose the right Valve here: Catalogue

Valve Technology

Closed vessels or tanks filled with liquids must have an opening through which the accumulated pressure can be released and vacuum in the tank or vessel compensated. For that purpose PROTEGO® Overpressure and Vacuum Relief Valves are provided with weight-loaded or spring-loaded valve discs. In the case of overpressure in the tank, the overpressure valve disc guided in the housing is lifted and releases the volume flow into the atmosphere. When there is a vacuum in the tank, the overpressure of the atmosphere lifts the vacuum disc and the tank is vented.

Operation of the valve under pressure in the tank

Operation of the valve under vacuum in the tank


Our product range includes:

  • Overpressure and Vacuum Relief Valves (end-of-line / in-line)

    • Pilot-operated Valves
    • Emergency Relief Valves

  • Overpressure and Vacuum Relief Valves with integrated Flame Arrester Unit (end-of-line)

    • Diaphragm Valves

Read more on "Safe Protection of Storage Tanks with Pressure / Vacuum Valves and Flame Arresters"


Special Features and advantages of PROTEGO® Valves

  • High flow capacity
  • PROTEGO® Valves open later and close earlier ensuring optimized pressure management and saving of inert gases
  • Reduction of product losses
  • Improved tightness

Pressure and Vacuum Relief Valves

PROTEGO® pressure and vacuum relief valves with full-lift pallet discharge the flow within 10% overpressure from the set pressure to a fully opened valve (full-lift).

Unless otherwise agreed, all PROTEGO® Valves are designed to our 10% technology.

Advantages of the PROTEGO® 10% technology:

  • Maintenance of pressure up to just below the maximum permissible (tank) pressure
  • Minimization of product losses
  • Reduction of emissions

Opening characteristics of valves with different overpressure levels

Discharge with full-lift pallet

Closed

Discharge with full-lift

Vapor Savings

Vapor saving potential for 10% full lift type valve compared with 100% overpressure valve. Using a full lift type technology valve (valve requiring only 10% overpressure to reach full lift and provide full performance) can result in additional 44%:


PROTEGO® Diaphragm Valves

PROTEGO® Diaphragm Valves are used at weather-related low temperatures and in sticky, polymerizing media because of their flexible diaphragms. They are the only valves worldwide which are frost-proof down to temperatures of -40°C.

Video "PROTEGO® UB/SF deflagration- and endurance burning-proof": watch video 

Video"PROTEGO® UB/SF Frost-Proof Pressure and Vacuum Diaphragm Valve": watch video

Benefits of PROTEGO® Diaphragm Valves

  • high performance seal reducing product loss below EPA’s 500ppm rule preventing environmental pollution
  • set pressure close to opening pressure enables optimum pressure maintenance in the system
  • liquid column height is monitored by level indicators (see picture on the right)
  • freeze protection at sub-zero conditions (see picture 1 on the back)
  • hinged design – maintenance friendly (see picture 2 on the back)
  • self draining function for condensate
  • particularly suitable for problematic products such as monomers,polymerizing media and vapours with a tendency to condensate, etc.

Operation - Inbreathing

Operation - Outbreathing

Diaphragm Valve PROTEGO® UB/SF


PROTEGO® Pilot Operated Relief Valves

PROTEGO® Pilot Operated Relief Valves discharge the volume flow without requiring pressure increase. Pilot valves are generally used wherever the valve must be very tightly sealed up to the set pressure. The pilot valves are produced according to API 2000 and have an optimized volume flow.

Advantages of PROTEGO® PM-HF, Pressure/Vacuum Pilot-Operated Relief Valve

  • Materials: Stainless steel and aluminum
  • Size: DN 3”/4” to DN 12”/16”
  • Temperature range: -196°C to +90°C
  • Set pressure range: +10 to +1034 mbar
  • Set vacuum range: -2,2 to -8,1 mbar
  • Conformity per API 7th Ed. and ISO 28300
  • Cryogenic Functional Test (per ISO 21013-4)
  • Blow down < 7%
  • Extremely tight valve seat to valve pallet seal

Pilot Operated Valve PROTEGO® PM-HF


PROTEGO® Emergency Pressure Relief Valves

PROTEGO® Emergency Pressure Relief Valves must be used when extremely high venting rates are required due to fire on the outer surface.

Tank protection by PROTEGO® VD/SV-PA Pressure and Vacuum Relief Valve, PROTEGO® ZM‑R Nitrogen Control Valve and PROTEGO® ER-V-LP Emergency Relief Valve

Emergency Pressure Relief Valve


PROTEGO® Leak Rates

The maximum permissible leak rates for PROTEGO® valves are listed in the table. We differentiate between the standard leak rate A and the special leak rates B and C. The latter require a valve pallet in metal-to-metal contact. The special leak rate C can be applied to valves having a minimum set pressure of 50 mbar or a set vacuum of 14 mbar. The standard leak rate A and the special leak rate B apply by analogy to below-atmospheric pressure uses. Liquid-loaded diaphragm valves are principally tested using the special leak rate B.


Special Valve Solutions

Alcohol Applications

PROTEGO® Valves with integrated Flame Arrester

Styrene Applications

PROTEGO® UB/SF - Diaphragm Valve with integrated Flame Arrester

Acrylate Applications

PROTEGO® UB/SF - Diaphragm Valve with integrated Flame Arrester


Valves - Catalogue

Pressure and Vacuum Relief Valves, end-of-line

Pressure Relief Valves, weight pallet type

P/EL

pressure range: 3.5 up to 210 mbar

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P/ELR

pressure range: 3.5 up to 210 mbar

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SD/BS-H

pressure range: 5 up to 210 mbar

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D/SVL

pressure range: 2 up to 60 mbar

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ER-V-LP

pressure range: 3.4 up to 15 mbar

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ER/V

pressure range: 5 up to 40 mbar

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ER/VH

pressure range: 25 up to 60 mbar

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ER/V-F

pressure range: 60 up to 500 mbar

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D/KSM

pressure range: 5 up to 100 mbar

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Vacuum Relief Valves, weight pallet type

SV/T-0-H


vacuum range: -7 up to -50 mbar

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V/SV


vacuum range: -2 up to -60 mbar

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V/SV-XL


vacuum range: -2 bis -16 mbar

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V/SV-XXL


vacuum range: -2 bis -16 mbar

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SV/E-1-0


vacuum range: -2 up to -60 mbar

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V/KSM


vacuum range: -5 up to -100 mbar

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Pressure and Vacuum Relief Valves, weight pallet type

PV/EL

pressure range: 2 up to 210 mbar
vacuum range: -3.5 up to -35 mbar

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PV/ELR

pressure range: 2 up to 210 mbar
vacuum range: -3.5 up to -50 mbar

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VD/SV

pressure range: 2 up to 60 mbar
vacuum range: -2 up to -60 mbar

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VD/SV-PA(L)

pressure range: 2 up to 60 mbar
vacuum range: -2 up to -60 mbar

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VD/KSM

pressure range: 5 up to 100 mbar
vacuum range: -5 up to -100 mbar

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VD/KSM-PA

pressure range: 5 up to 100 mbar
vacuum range: -5 up to -100 mbar

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Pressure and Vacuum Relief Valves, pilot-operated

VN-A-PC

pressure range: 20 bis 1034 mbar
vacuum range: -2.2 bis -7 mbar

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PM/(D)S

pressure range: 10 up to 300 mbar
vacuum range: -3 up to -7 mbar

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PM-HF

pressure range: 10 up to 1034 mbar
vacuum range: -2.2 up to -7 mbar

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Pressure and Vacuum Relief Valves, in-line

Pressure or Vacuum Relief Valves

DZ/E

pressure range: 2 up to 60 mbar
vacuum range: -2 up to -60 mbar

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DZ/E-F

pressure range: 60 up to 500 mbar
vacuum range: -60 up to -500 mbar

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DZ/EA

pressure range: 5 up to 50 mbar
vacuum range: -5 up to -50 mbar

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DZ/EA-F

pressure range: 60 up to 500 mbar
vacuum range: -60 up to -500 mbar

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DZ/T

pressure range: 2 up to 60 mbar
vacuum range: -2 up to -60 mbar

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DZ/T-F

pressure range: 60 up to 500 mbar
vacuum range: -60 up to -500 mbar

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R/KSM

pressure range: 5 up to 100 mbar
vacuum range: -5 up to -100 mbar

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Pressure and Vacuum Relief Valves

DV/ZT

pressure range: 2 up to 60 mbar
vacuum range: -2 up to -60 mbar

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DV/ZT-F

pressure range: 60 up to 500 mbar
vacuum range: -3.5 up to -50 mbar

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DV/ZU

pressure range: 2 up to 60 mbar
vacuum range: -3.5 up to -50 mbar

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DV/ZU-F

pressure range: 60 up to 500 mbar
vacuum range: -3.5 up to -50 mbar

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DV/ZW

pressure range: 2 up to 60 mbar
vacuum range: -3.5 up to -50 mbar

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DV/ZW-F

pressure range: 60 up to 500 mbar
vacuum range: -3.5 up to -50 mbar

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Blanketing Valve

ZM-R

pressure range: up to 500 mbar
vacuum range: up to -200 mbar

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Pressure and Vacuum Relief Valves with Flame Arrester, end-of-line

Pressure Relief Valves, pallet type

P/EBR

pressure range: 3.5 up to 210 mbar

Explosion Group: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3

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P/EB

pressure range: 3.5 up to 210 mbar

Explosion Group: IIA1 , D / IIA

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P/EB-E

pressure range: 3.5 up to 210 mbar

Explosion Group: IIA1 , D / IIA , C / IIB1

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P/EBR-E

pressure range: 3.5 up to 210 mbar

Explosion Group: IIA1 , D / IIA , C / IIB1

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D-SVL-EB-200-IIA

pressure range: 2 up to 60 mbar

Explosion Group: IIA1 , D / IIA

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BE/HR-D

pressure range: 2 up to 35 mbar

Explosion Group: IIA1 , D / IIA

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Vacuum Relief Valves, pallet type

SV/E


vacuum range: -2 up to -60 mbar

Explosion Group: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3 , B / IIB , B / IIC

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Pressure/Vacuum Relief Valves, pallet type

PV/EB

pressure range: 2 up to 210 mbar
vacuum range: -3.5 up to -35 mbar

Explosion Group: IIA1 , D / IIA

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PV/EB-E

pressure range: 2 up to 210 mbar
vacuum range: -3.5 up to -35 mbar

Explosion Group: IIA1 , D / IIA , C / IIB1

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PV/EBR

pressure range: 2 up to 210 mbar
vacuum range: -3.5 up to -50 mbar

Explosion Group: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3

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PV/EBR-E

pressure range: 2 up to 210 mbar
vacuum range: -3.5 up to -50 mbar

Explosion Group: IIA1 , D / IIA , C / IIB1

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VD/SV-AD and VD/SV-ADL

pressure range: -3.5 up to 35 mbar
vacuum range: -2 up to -35 mbar

Explosion Group: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3

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VD/SV-HR

pressure range: 3.5 up to 35 mbar
vacuum range: -2 up to -35 mbar

Explosion Group: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3

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VD/SV-HRL

pressure range: 3.5 up to 35 mbar
vacuum range: -2 up to -35 mbar

Explosion Group: IIA1 , D / IIA

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VD-SV-EB

pressure range: 2 up to 60 mbar
vacuum range: -2 up to -60 mbar

Explosion Group: IIA1 , D / IIA

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VD/TS

pressure range: 3.5 up to 50 mbar
vacuum range: -2 up to -25 mbar

Explosion Group: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3

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Pressure/Vacuum Relief Valves, Diaphragm Valves

UB/SF

pressure range: 3.5 up to 140 mbar
vacuum range: -3.5 up to -35 mbar

Explosion Group: D / IIA , C / IIB1 , C / IIB2 , C / IIB3

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UB/SF-IIA1

pressure range: 3.5 up to 150 mbar
vacuum range: -3.5 up to -35 mbar

Explosion Group: IIA1

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UB/DF

pressure range: 3.5 up to 140 mbar

Explosion Group: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3

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UB/VF


vacuum range: -3.5 up to -35 mbar

Explosion Group: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3

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Pressure Relief Valves, High Velocity Valves

DE/S-IIB

pressure range: 100 up to 500 mbar

Explosion Group: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3 , B / IIB

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DE/S-IIB3

pressure range: 100 up to 500 mbar

Explosion Group: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3

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DE/S-MK VI

pressure range: 60 up to 350 mbar

Explosion Group: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3 , B / IIB , B / IIC

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DE/S-MK VI - IIB3

pressure range: 60 up to 350 mbar

Explosion Group: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3 , B / IIB

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