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PROTEGO
Excellence in Safety and Environment

VD/SV-HRL

Pressure/Vacuum Relief Valvedeflagration- and endurance burning-proof

Features

10% Technology
for minimum pressure increase up to full lift Lift Lift is the actual travel of the valve pallet from the main valve out of the closed position.
Extreme Tightness
resulting in lowest possible product Product Includes equipment, protective systems, devices, components and combinations of these. losses and reduced environmental pollution
Optimum Pressure Maintenance
based on 10% technology , 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. is close to opening pressure for optimum pressure maintenance Maintenance Combination of all technical and administrative actions, including supervision actions, intended to maintain or restore a unit in working order. in the system as compared to conventional 40% or 100% technology
More Efficient Opening and Closing
valve opens later and closes earlier than conventional valves
Guided Valve Pallet
valve pallet Valve pallet Valve pallet is the generic term for the assembly that rests on the valve seat. is guided inside the housing Housing A housing is a solid shell, which surrounds a content, either protecting the content from external influences, or protecting the environment from the content. to protect against harsh weather conditions
Protective System According to ATEX
can be used as a protective system Protective system All devices, with the exception of components (see A.6) of the equipment, intended to immediately stop explosions and/or to limit the area affected by an explosion and separately placed on the market as autonomous systems. in areas with potentially explosive atmosphere Explosive atmosphere A mixture of air and flammable substance in the form of gases, vapors, mists or dusts under atmospheric conditions in which, after ignition, spreads to the entire unburned mixture. in accordance with ATEX
Safety Against Endurance Burning
Protection against Atmospheric Deflagration and Endurance Burning
Intergrated Flame Arrester
integrated PROTEGO® flame arrester unit PROTEGO® flame arrester unit The PROTEGO® flame arrester unit is the main component of a flame arrester. It prevents flame propagation. saves space and weight and reduces costs
Modular Design
allows replacement and cleaning of single FLAMEFILTER®
Function and Description

combined pressure and vacuum relief valve

The atmospheric deflagration Deflagration Explosion propagating at subsonic velocity (EN 1127-1:1997). and endurance burning Endurance burning Stabilized burning for an unlimited time. -proof VD/SV-HRL type PROTEGO® valve is a highly developed combined pressure/vacuum relief valve Pressure/vacuum relief valve Pressure/vacuum relief valve is an umbrella term that includes pressure or vacuum relief valve as well as pressure and vacuum relief valve. for high flow capacities with an integrated flame arrester. It is primarily used as a device Device A device is a pipe component that influences the media flow by opening, closing, or partially shutting off the flow channel or by dividing or mixing the media flow. for flame transmission proof in-breathing and out-breathing on tanks, containers, and process equipment Equipment Machines, appliances, fixed or mobile devices, control parts and accessories, and warning and prevention systems, whether separate or combined, intended for the generation, transfer, storage, measurement, control, and conversion of energy, and for the processing of materials, which have their own potential source of ignition and may cause an explosion. . The valve offers reliable protection against overpressure Overpressure Overpressure refers to an increase in pressure in a system or vessel above the normal operating pressure. and vacuum Vacuum Vacuum is the pressure in an enclosed space that is lower than the ambient pressure. , prevents the in-breathing of air and product losses almost up to the set pressure, and protects against atmospheric eflagration and endurance burning if stabilized burning Stabilized burning Steady burning of a flame stabilized at, or close to the flame arrester element. occurs.

10%-Technology

The PROTEGO® flame arrester unit is designed to achieve minimum pressure drop with maximum safety. The PROTEGO® VD/SV-HRL device is available for substances of explosion Explosion Abrupt oxidation or decomposition reaction producing an increase in temperature, pressure, or in both simultaneously. group IIA (NEC group D MESG > 0.9 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) or maximum allowable working vacuum (MAWV) 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.

advanced manufacturing technology

The tank pressure Tank pressure Tank pressure is the pressure within a tank. is maintained up to the set pressure with a tightness that is above The normal standards due to our tate-of-the-art manufacturing technology. This feature is ensured by valve seats made of high quality stainless steel and with individually lapped valve pallets (1), or with an air cushion seal Seal A seal prevents or limits unwanted transfer of product from one container to another. Seal is used as superordinate term for all types of sealing elements. (2), in conjunction with high quality FEP diaphragm Diaphragm A diaphragm is a thin layer of material, which has a large surface area. . 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 of corrosive fluids. After the overpressure s released, the valve re-seats and provides a tight seal.

Main component - PROTEGO® flame arrester

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) revents flame transmission into the tank. If additional mixture continues to flow and stabilized occurs, the integrated flame arrester prevents flashback Flashback Phenomenon occurring in a flammable mixture of air and gas when the local velocity of the combustible mixture becomes less than the flame velocity, causing the flame to travel back to the point of mixture. as a result of endurance burning. The valve is protected and also fulfils its function under thesesevere conditions. The spring Spring A spring is a spiral of wire which returns to its original shape after it is pressed or pulled. -loaded weather hood Weather hood A weather hood is a cover to protect the internal components of a device from environmental influences. opens as soon as the melting element Melting element The melting element is a component that consists of a housing with a lower and upper part. (4) melts.

Many Individual Certifications

The valve can be used at an operating temperature Operating temperature Temperature reached when the equipment is operating under design conditions. of up to +60°C /140°F and meets he requirements of European tank design standard EN 14015 (Appendix L) and ISO 28300 (API 2000). EU conformity according to the currently valid ATEX directive. Approvals according to other national/international regulations on request.
Product Data and Features

Selection of explosion group

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.

other types upon request

Design Types and Specifications

Any combination of vacuum and pressure levels can be set for the valve
The valve discs are weight-loaded.
Pressure/vacuum relief valve, basic designVD/SV-HRL

Additional special devices available upon request

Settings

Pressure:+3.5 mbar+35 mbar
+1.4 inch W.C.+14 inch W.C.
Vacuum:-2.0 mbar-35 mbar
-0.8 inch W.C.-14 inch W.C.

Higher and lower settings upon request

Material selection for housing

Design AB
HousingSteelStainless Steel
Valve saetsStainless SteelStainless Steel
Gasket
PTFE
PTFE
Weather hoodSteelStainless Steel
Flame arrester unit Flame arrester unit Flame arrester casing with FLAMEFILTER® set. A, BB

Special materials upon request

Material combinations of flame arrester unit

Ausführung AB
FLAMEFILTER® cageSteelStainless Steel
FLAMEFILTER®Stainless SteelStainless Steel

Special materials upon request

Material selection for pressure 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 +35
>+5.6 up to +14		>+14 up to +35
>+5.6 up to +14
Valve palletAluminiumStainless SteelStainless SteelStainless Steel
SealingFEPFEPMetal to MetalPTFE

Special material as well as higher set pressure upon request

Material selection for vacuum valve pallet

Design ABCD
Vacuum range [mbar]
[inch W.C.]		-2.0 up to -3.5
-0.8 up to -1.4		<-3.5 up to -14
<-1.4 up to -5.6		<+14 up to +35
<-5.6 up to -14		<-14 up to -35
<-5.6 up to -14
Valve palletAluminiumStainless SteelStainless SteelStainless Steel
SealingFEPFEPMetal to MetalPTFE

Special material as well as higher set vacuum Set vacuum Internal negative gauge pressure at which a vacuum valve first opens. upon request

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”.

Detail X

Detail X

Applications