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
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: -200°C to +60°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
Vacuum Relief Valves, weight pallet type
Pressure and Vacuum Relief Valves, weight pallet type
Pressure and Vacuum Relief Valves, in-line
Pressure or Vacuum Relief Valves
Pressure and Vacuum Relief Valves
Blanketing Valve
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
P/EB-E
pressure range: 3.5 up to 210 mbar
Explosion Group: IIA1 , D / IIA , C / IIB1
P/EBR-E
pressure range: 3.5 up to 210 mbar
Explosion Group: IIA1 , D / IIA , C / IIB1
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
Pressure/Vacuum Relief Valves, pallet type
PV/EBR-E-IIB3
pressure range: 2 up to 210 mbar
vacuum range: -3.5 up to -50 mbar
Explosion Group: IIA1 , D / IIA , C / IIB3
PV/EB
pressure range: 2 up to 210 mbar
vacuum range: -3.5 up to -35 mbar
Explosion Group: IIA1 , D / IIA
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
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
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
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
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
VD/SV-HRL
pressure range: 3.5 up to 35 mbar
vacuum range: -2 up to -35 mbar
Explosion Group: IIA1 , D / IIA
VD-SV-EB
pressure range: 2 up to 60 mbar
vacuum range: -2 up to -60 mbar
Explosion Group: IIA1 , D / IIA
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
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
UB/SF-IIA1
pressure range: 3.5 up to 150 mbar
vacuum range: -3.5 up to -35 mbar
Explosion Group: IIA1
UB/DF
pressure range: 3.5 up to 140 mbar
Explosion Group: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3
UB/VF
vacuum range: -3.5 up to -35 mbar
Explosion Group: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3
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
DE/S-IIB3
pressure range: 100 up to 500 mbar
Explosion Group: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3
DE/S-MK VI - IIB3
pressure range: 60 up to 350 mbar
Explosion Group: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3
DE/S-MK VI - IIC
pressure range: 60 up to 350 mbar
Explosion Group: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3 , B / IIB , B / IIC