D-SVL-EB-200-IIA

D-SVL-EB-200-IIA

Pressure Relief Valve

deflagration- and endurance burning-proof

Function and Description

The deflagration-proof and endurance burning-proof D-SVL-EB type PROTEGO® valve is a highly developed pressure relief valve for large flows with an integrated flame arrester PROTEGO® EB. It is primarily used as a safety device for flame transmission proof outbreathing on tanks, containers and process engineering apparatus. The valve offers reliable protectionagainst excess pressure and prevents product losses almost up to the set pressure; it also protects against atmospheric deflagration as well as endurance burning if stabilized burning occurs. The PROTEGO® flame arrester unit is designed to achieve minimum pressure drop with maximum safety. PROTEGO® D-SVL-EB valves are available for substances for substances of explosion 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) 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 superior to the conventional standard due to our state of the art manufacturing technology. This feature is ensured 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 the valve pallets from sticking when sticky products are used and to enable the use in corrosive fluids. After the excess pressure is discharged, the valve reseats and provides a tight seal.

If the set pressure is exceeded, explosive gas/product-vapour air mixtures are released to the atmosphere. If this mixture ignites, the integrated flame arrester PROTEGO® EB (3) prevents flame transmission into the tank. If additional mixture continues to flow and stabilized burning occurs, the integrated flame arrester unit prevents flashback as a result from endurance burning. The valve is protected and also fullfils its function under this severe service conditions. The spring loaded weather Hood opens as soon as the fusible element (4) melts.

The valve can be used up to an operating temperature of +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 ISO 16852 as well as other international standards.

Features and Advantages

  • requires only 10% overpressure to full lift
  • through 10% technology higher set pressures can be used which results in product loss reduction compared to conventional 10% and 100% overpressure technology vents (compare API 2000)
  • more design flexibility through higher reseating pressures; vents reseat when conventional vent is still discharging
    costly product or nitrogen
  • high performance seal reducing product loss below EPA’s 500ppm rule preventing environmental pollution
  • the valve disc is guided within the housing to protect against harsh weather conditions
  • can be used as protective system according ATEX in Areas subject to explosion hazards
  • PROTEGO® flame arrester unit provides protection against atmospheric deflagration and endurance burning
  • flame arrester unit integrated into the valve saves space, weight and reduces cost
  • flame arrester unit protected from clogging through product vapour
  • flame arrester unit has a low pressure drop
  • flame transmission proof condensate drain
  • maintenance friendly design
  • modular design enables individual FLAMEFILTER® and valve pallet to be replaced

Dimensions

DN DN2 a bc d e
200 / 8“400 / 16“ 705 / 27.76 846 / 33.31 802 / 31.57 1500 / 59.06 109 / 4.29
DN DN2 a bc d e
200 / 8“400 / 16“ 705 / 27.76 846 / 33.31 802 / 31.57 1500 / 59.06 109 / 4.29

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

D-SVL-EB-200-IIA

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Material selection for housing

Design   BC
HousingSteelStainless Steel
Heating jacket (D-SVL-EB-H-...)Steel Stainless Steel
Valve seat Stainless Steel Stainless Steel
SpacerPTFEPTFE
Flange ring Steel Stainless Steel
Weather hood Steel Stainless Steel
Flame arrester unitAA, B
Design   BC
HousingSteelStainless Steel
Heating jacket (D-SVL-EB-H-...)Steel Stainless Steel
Valve seat Stainless Steel Stainless Steel
SpacerPTFEPTFE
Flange ring Steel Stainless Steel
Weather hood Steel Stainless Steel
Flame arrester unitAA, B

Special materials upon request

Material combinations of flame arrester unit

Design   AB
FLAMEFILTER® cageSteel Stainless Steel
FLAMEFILTER® Stainless Steel Stainless Steel
Safety bar Stainless Steel Stainless Steel
Design   AB
FLAMEFILTER® cageSteel Stainless Steel
FLAMEFILTER® Stainless Steel Stainless Steel
Safety bar Stainless Steel Stainless Steel

Special materials upon request

Material selection for valve pallet

Design ABCDEF
Pressure 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
>+35 up to +60
>+14 up to +24
>+14 up to +35
>+5.6 up to +14
>+35 up to +60
>+14 up to +24
Valve palletAluminium Stainless Steel Stainless Steel Stainless Steel Stainless Steel Stainless Steel
SealingFEPFEP Metal to Metal Metal to MetalPTFEPTFE
Design ABCDEF
Pressure 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
>+35 up to +60
>+14 up to +24
>+14 up to +35
>+5.6 up to +14
>+35 up to +60
>+14 up to +24
Valve palletAluminium Stainless Steel Stainless Steel Stainless Steel Stainless Steel Stainless Steel
SealingFEPFEP Metal to Metal Metal to MetalPTFEPTFE

D-SVL-EB-200-IIA

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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; 150 lbs RFSF
EN 1092-1; Form B1
ASME B16.5; 150 lbs RFSF

other types upon request

Design Types and Specifications

The valve disc is weight-loaded.
There are two different designs:

Pressure relief valve, basic design

D-SVL-EB - –

Pressure relief valve with heating jacket

D-SVL-EB - H

Pressure relief valve, basic design

D-SVL-EB - –

Pressure relief valve with heating jacket

D-SVL-EB - H

Additional special devices available upon request

Settings

Pressure:

+2.0 mbar

+60 mbar

+0.8 inch W.C.

+24 inch W.C.

Higher pressure settings upon request.

D-SVL-EB-200-IIA

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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). Conversion to other densities and temperatures refer to Vol. 1: “Technical Fundamentals”.

D-SVL-EB-200-IIA

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D-SVL-EB-200-IIA

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