EF/V-IIB3

EF/V-IIB3

Detonation Flame Arrester

Detonation-proof foot valve for suction lines

Function and Description

The PROTEGO® EF/V-IIB3 detonation-safe foot valve protects the suction line in a storage tank. The nearly service-free device is installed at the end of the emptying line within the tank. When a pump draws, the valve opens at an approximate underpressure of 30 mbar / 12 inch W.C. . When the pump is turned off, the device functions as a check valve and prevents the line from emptying. This is very helpful when the pump is restarted.

Combustible mixtures can arise in filling and drain lines of storage containers that are not always filled with product. With the ignition of the explosive atmosphere, highly accelerated pipe deflagration or detonations can arise. The detonation-proof foot valve prevents the combustion from being transmitted into the tank and destroying it. The design of the foot valve ensures that the strainer is always filled with residual product. Together with the special valve design, this combination prevents flame flash back from the inside out.

The application limits for the device are a product vapour/air mixture temperature up to +60°C / 140°F and an absolute pressure up to 1.1 bar / 15.9 psi. This covers all of the possible operating conditions of empty lines for flammable liquids.

The device protects against nearly all flammable liquids, and is permitted for explosion group IIB3 (C MESG ≥ 0.65 mm).

Type-approved in accordance with the current ATEX Directive and EN ISO 16852 as well as other international standards.

Features and Advantages

  • almost service-free
  • the check valve makes it easier to start the pump
  • provides protection from deflagrations and stable detonations
  • applicable to nearly all flammable liquids
  • meets TRbF * 20 requirements
  • the special strainer prevents solid particles from entering

*TRbF = technical regulations for flammable liquids

Dimensions

To select the nominal size (DN), please use the flow capacity chart on the following pages

DN25 / 1"32 / 1¼“40 / 1½“50 / 2"65 / 2½“80 / 3"100 / 4"125 / 5"150 / 6"200 / 8"250 / 10"
a125 / 4.92125 / 4.92135 / 5.31135 / 5.31160 / 6.29160 / 6.29200 / 7.87235 / 9.25260 / 10.24400 / 15.75450 / 17.72
b85 / 3.3585 / 3.3585 / 3.3585 / 3.3595 / 3.7495 / 3.74125 / 4.92130 / 5.12135 / 5.31175 / 6.89200 / 7.87
c155 / 6.10155 / 6.10180 / 7.09180 / 7.09210 / 8.27210 / 8.27250 / 9.84310 / 12.20365 / 14.37480 / 18.90565 / 22.24
DN25 / 1"32 / 1¼“40 / 1½“50 / 2"65 / 2½“80 / 3"100 / 4"125 / 5"150 / 6"200 / 8"250 / 10"
a125 / 4.92125 / 4.92135 / 5.31135 / 5.31160 / 6.29160 / 6.29200 / 7.87235 / 9.25260 / 10.24400 / 15.75450 / 17.72
b85 / 3.3585 / 3.3585 / 3.3585 / 3.3595 / 3.7495 / 3.74125 / 4.92130 / 5.12135 / 5.31175 / 6.89200 / 7.87
c155 / 6.10155 / 6.10180 / 7.09180 / 7.09210 / 8.27210 / 8.27250 / 9.84310 / 12.20365 / 14.37480 / 18.90565 / 22.24

Dimensions in mm / inches

EF/V-IIB3

Material selection for housing

Design  ABCD
Housing Steel Stainless Steel Steel Stainless Steel
Valve Stainless Steel Stainless Steel Stainless Steel Stainless Steel
Gasket (Valve)PTFEPTFE PTFEPTFE
Gasket (Housing)FPMFPM PTFEPTFE
StrainerStainless SteelStainless SteelStainless SteelStainless Steel
Design  ABCD
Housing Steel Stainless Steel Steel Stainless Steel
Valve Stainless Steel Stainless Steel Stainless Steel Stainless Steel
Gasket (Valve)PTFEPTFE PTFEPTFE
Gasket (Housing)FPMFPM PTFEPTFE
StrainerStainless SteelStainless SteelStainless SteelStainless Steel

Special materials upon request

EF/V-IIB3

Selection of explosion group

MESGExpl. Gr. (IEC / CEN)Gas Group (NEC)
> 0,90 mmIIAD
≥ 0,65 mmIIB3C
MESGExpl. Gr. (IEC / CEN)Gas Group (NEC)
> 0,90 mmIIAD
≥ 0,65 mmIIB3C

Special approvals upon request

Specification of max. operating temperature

≤ 60°C / 140°FTmaximum allowable operating temperature in °C
-Designation
≤ 60°C / 140°FTmaximum allowable operating temperature in °C
-Designation

higher operating temperatures 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 connections upon request

EF/V-IIB3

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”.

EF/V-IIB3
EF/V-IIB3