Nederman

B-Flap I-Explosion Isolation Flap Valve

B-Flap I-Explosion Isolation Flap Valve

Explosion Isolation Flap Valve B-Flap I - protective system.

Flow-Actuated Flap Valve type B-Flap I is designed as explosion pressure resistance equipment, which is able to
prevent a transmission of dangerous effects of explosion pressure wave and flames front to upstream areas. Product
has been designed in accordance with European Directive 2014/34/EU and certified by EN 16447 and EN 15089.

B-Flap I can be used in PULL acc. EN 16447 and PULL /PUSH or Reverse flow applications acc. EN 15089.

Description:
Welded construction in RAL 3000 painted carbon steel. Stainless steel without a surface finish only on special request.

Function:
In case of an explosion in the downstream equipment (e.g. dust collector) a pressure wave will force to close the Flap plate and lock in position. When Flap plate is closed it makes an effective barrier against approaching flame front. This prevent the explosion from being transmitted to upstream work areas.

  • Inside valve, zones 20 or 2
  • Outside valve, zone 21,22, no zone

Technical data
Certifications CE, EX
Material Painted carbon steel
Operating temperature range -40°C to 80°C
Ambient temperature range -40°C to 80°C (-20°C to 60°C for versionswith electrical accessories)
Dust Concentration in duct 500 g/m3
Max velocity in duct (m/s) 35
Minimum velocity in duct 0
Install type Pull

Models31

    B-Flap I K-ZKL-100-ST1 Explosion Isolation Flap Valve

    ArtNo: 73007996

    Diameter (mm)
    100
    Weight (kg)
    9
    Min vessel size (m3)
    0,46
    Note
    B-FLAP I, sizes 100-400, St1 marked, may be used on light metal dust (aluminum, etc..)
    Explosion Class ATEX
    St1
    Minimum vessel size, pull (m3)
    0,46
    Kst (bar m/s)
    200
    Maximum reduced pressurem, Pred (bar)
    0,6
    B-Flap I K-ZKL-125-ST1 Explosion Isolation Flap Valve

    ArtNo: 73007998

    Diameter (mm)
    125
    Explosion Class ATEX
    St1
    Kst (bar m/s)
    200
    Min vessel size (m3)
    0,46
    Minimum vessel size, pull (m3)
    0,46
    Maximum reduced pressurem, Pred (bar)
    0,6
    Note
    B-FLAP I, sizes 100-400, St1 marked, may be used on light metal dust (aluminum, etc..)
    Weight (kg)
    11
    B-Flap I K-ZKL-150-ST1 Explosion Isolation Flap Valve

    ArtNo: 73008000

    Diameter (mm)
    150
    Weight (kg)
    13
    Min vessel size (m3)
    0,46
    Note
    B-FLAP I, sizes 100-400, St1 marked, may be used on light metal dust (aluminum, etc..)
    Explosion Class ATEX
    St1
    Minimum vessel size, pull (m3)
    0,46
    Kst (bar m/s)
    200
    Maximum reduced pressurem, Pred (bar)
    0,6
    B-Flap I K-ZKL-200-ST1 Explosion Isolation Flap Valve

    ArtNo: 73008002

    Diameter (mm)
    200
    Weight (kg)
    18
    Min vessel size (m3)
    0,46
    Note
    B-FLAP I, sizes 100-400, St1 marked, may be used on light metal dust (aluminum, etc..)
    Explosion Class ATEX
    St1
    Minimum vessel size, pull (m3)
    0,46
    Kst (bar m/s)
    200
    Maximum reduced pressurem, Pred (bar)
    0,6
    B-Flap I K-ZKL-250-ST1 Explosion Isolation Flap Valve

    ArtNo: 73008004

    Diameter (mm)
    250
    Weight (kg)
    40
    Min vessel size (m3)
    0,9
    Note
    B-FLAP I, sizes 100-400, St1 marked, may be used on light metal dust (aluminum, etc..)
    Explosion Class ATEX
    St1
    Minimum vessel size, pull (m3)
    0,9
    Kst (bar m/s)
    200
    Maximum reduced pressurem, Pred (bar)
    0,45
    B-Flap I K-ZKL-300-ST1 Explosion Isolation Flap Valve

    ArtNo: 73008006

    Diameter (mm)
    300
    Weight (kg)
    50
    Min vessel size (m3)
    0,9
    Note
    B-FLAP I, sizes 100-400, St1 marked, may be used on light metal dust (aluminum, etc..)
    Explosion Class ATEX
    St1
    Minimum vessel size, pull (m3)
    0,9
    Kst (bar m/s)
    200
    Maximum reduced pressurem, Pred (bar)
    0,45
    B-Flap I K-ZKL-315-ST1 Explosion Isolation Flap Valve

    ArtNo: 73008008

    Diameter (mm)
    315
    Weight (kg)
    53
    Min vessel size (m3)
    0,9
    Note
    B-FLAP I, sizes 100-400, St1 marked, may be used on light metal dust (aluminum, etc..)
    Explosion Class ATEX
    St1
    Minimum vessel size, pull (m3)
    0,9
    Kst (bar m/s)
    200
    Maximum reduced pressurem, Pred (bar)
    0,45
    B-Flap I K-ZKL-355-ST1 Explosion Isolation Flap Valve

    ArtNo: 73008010

    Diameter (mm)
    355
    Weight (kg)
    61
    Min vessel size (m3)
    0,9
    Note
    B-FLAP I, sizes 100-400, St1 marked, may be used on light metal dust (aluminum, etc..)
    Explosion Class ATEX
    St1
    Minimum vessel size, pull (m3)
    0,9
    Kst (bar m/s)
    200
    Maximum reduced pressurem, Pred (bar)
    0,45
    B-Flap I K-ZKL-400-ST1 Explosion Isolation Flap Valve

    ArtNo: 73008012

    Diameter (mm)
    400
    Weight (kg)
    77
    Min vessel size (m3)
    0,9
    Note
    B-FLAP I, sizes 100-400, St1 marked, may be used on light metal dust (aluminum, etc..)
    Explosion Class ATEX
    St1
    Minimum vessel size, pull (m3)
    0,9
    Kst (bar m/s)
    200
    Maximum reduced pressurem, Pred (bar)
    0,45
    B-Flap I K-ZKL-100-N-ST1 Explosion Isolation Flap Valve AISI 304

    ArtNo: 73008021

    Diameter (mm)
    100
    Weight (kg)
    9
    Min vessel size (m3)
    0,46
    Note
    Stainless Steel
    Explosion Class ATEX
    St1
    Minimum vessel size, pull (m3)
    0,46
    Kst (bar m/s)
    200
    Maximum reduced pressurem, Pred (bar)
    0,6
    B-Flap I K-ZKL-100-N-ST2 Explosion Isolation Flap Valve AISI 304

    ArtNo: 73008022

    Diameter (mm)
    100
    Weight (kg)
    9
    Min vessel size (m3)
    0,46
    Note
    Stainless Steel
    Explosion Class ATEX
    St2
    Minimum vessel size, pull (m3)
    0,46
    Kst (bar m/s)
    300
    Maximum reduced pressurem, Pred (bar)
    0,6
    B-Flap I K-ZKL-125-N-ST1 Explosion Isolation Flap Valve AISI 304

    ArtNo: 73008023

    Diameter (mm)
    125
    Weight (kg)
    11
    Min vessel size (m3)
    0,46
    Note
    Stainless Steel
    Explosion Class ATEX
    St1
    Minimum vessel size, pull (m3)
    0,46
    Kst (bar m/s)
    200
    Maximum reduced pressurem, Pred (bar)
    0,6
    B-Flap I K-ZKL-125-N-ST2 Explosion Isolation Flap Valve AISI 304

    ArtNo: 73008024

    Diameter (mm)
    125
    Weight (kg)
    11
    Min vessel size (m3)
    0,46
    Note
    Stainless Steel
    Explosion Class ATEX
    St2
    Minimum vessel size, pull (m3)
    0,46
    Kst (bar m/s)
    300
    Maximum reduced pressurem, Pred (bar)
    0,6
    B-Flap I K-ZKL-150-N-ST1 Explosion Isolation Flap Valve AISI 304

    ArtNo: 73008025

    Diameter (mm)
    150
    Weight (kg)
    13
    Min vessel size (m3)
    0,46
    Note
    Stainless Steel
    Explosion Class ATEX
    St1
    Minimum vessel size, pull (m3)
    0,46
    Kst (bar m/s)
    200
    Maximum reduced pressurem, Pred (bar)
    0,6
    B-Flap I K-ZKL-150-N-ST2 Explosion Isolation Flap Valve AISI 304

    ArtNo: 73008026

    Diameter (mm)
    150
    Weight (kg)
    13
    Min vessel size (m3)
    0,46
    Note
    Stainless Steel
    Explosion Class ATEX
    St2
    Minimum vessel size, pull (m3)
    0,46
    Kst (bar m/s)
    300
    Maximum reduced pressurem, Pred (bar)
    0,6
    B-Flap I K-ZKL-200-N-ST1 Explosion Isolation Flap Valve AISI 304

    ArtNo: 73008027

    Diameter (mm)
    200
    Weight (kg)
    18
    Min vessel size (m3)
    0,46
    Note
    Stainless Steel
    Explosion Class ATEX
    St1
    Minimum vessel size, pull (m3)
    0,46
    Kst (bar m/s)
    200
    Maximum reduced pressurem, Pred (bar)
    0,6
    B-Flap I K-ZKL-200-N-ST2 Explosion Isolation Flap Valve AISI 304

    ArtNo: 73008028

    Diameter (mm)
    200
    Weight (kg)
    18
    Min vessel size (m3)
    0,46
    Note
    Stainless Steel
    Explosion Class ATEX
    St2
    Minimum vessel size, pull (m3)
    0,46
    Kst (bar m/s)
    300
    Maximum reduced pressurem, Pred (bar)
    0,6
    B-Flap I K-ZKL-250-N-ST1 Explosion Isolation Flap Valve AISI 304

    ArtNo: 73008029

    Diameter (mm)
    250
    Weight (kg)
    40
    Min vessel size (m3)
    0,9
    Note
    Stainless Steel
    Explosion Class ATEX
    St1
    Minimum vessel size, pull (m3)
    0,9
    Kst (bar m/s)
    200
    Maximum reduced pressurem, Pred (bar)
    0,45
    B-Flap I K-ZKL-250-N-ST2 Explosion Isolation Flap Valve AISI 304

    ArtNo: 73008030

    Diameter (mm)
    250
    Weight (kg)
    40
    Min vessel size (m3)
    0,9
    Note
    Stainless Steel
    Explosion Class ATEX
    St2
    Minimum vessel size, pull (m3)
    0,9
    Kst (bar m/s)
    300
    Maximum reduced pressurem, Pred (bar)
    0,35
    B-Flap I K-ZKL-300-N-ST1 Explosion Isolation Flap Valve AISI 304

    ArtNo: 73008031

    Diameter (mm)
    300
    Weight (kg)
    50
    Min vessel size (m3)
    0,9
    Note
    Stainless Steel
    Explosion Class ATEX
    St1
    Minimum vessel size, pull (m3)
    0,9
    Kst (bar m/s)
    200
    Maximum reduced pressurem, Pred (bar)
    0,45
    B-Flap I K-ZKL-300-N-ST2 Explosion Isolation Flap Valve AISI 304

    ArtNo: 73008032

    Diameter (mm)
    300
    Weight (kg)
    50
    Min vessel size (m3)
    0,9
    Note
    Stainless Steel
    Explosion Class ATEX
    St2
    Minimum vessel size, pull (m3)
    0,9
    Kst (bar m/s)
    300
    Maximum reduced pressurem, Pred (bar)
    0,35
    B-Flap I K-ZKL-315-N-ST1 Explosion Isolation Flap Valve AISI 304

    ArtNo: 73008033

    Diameter (mm)
    315
    Weight (kg)
    53
    Min vessel size (m3)
    0,9
    Note
    Stainless Steel
    Explosion Class ATEX
    St1
    Minimum vessel size, pull (m3)
    0,9
    Kst (bar m/s)
    200
    Maximum reduced pressurem, Pred (bar)
    0,45
    B-Flap I K-ZKL-315-N-ST2 Explosion Isolation Flap Valve AISI 304

    ArtNo: 73008034

    Diameter (mm)
    315
    Weight (kg)
    53
    Min vessel size (m3)
    0,9
    Note
    Stainless Steel
    Explosion Class ATEX
    St2
    Minimum vessel size, pull (m3)
    0,9
    Kst (bar m/s)
    300
    Maximum reduced pressurem, Pred (bar)
    0,35
    B-Flap I K-ZKL-355-N-ST1 Explosion Isolation Flap Valve AISI 304

    ArtNo: 73008035

    Diameter (mm)
    355
    Weight (kg)
    61
    Min vessel size (m3)
    0,9
    Note
    Stainless Steel
    Explosion Class ATEX
    St1
    Minimum vessel size, pull (m3)
    0,9
    Kst (bar m/s)
    200
    Maximum reduced pressurem, Pred (bar)
    0,45
    B-Flap I K-ZKL-355-N-ST2 Explosion Isolation Flap Valve AISI 304

    ArtNo: 73008036

    Diameter (mm)
    355
    Weight (kg)
    61
    Min vessel size (m3)
    0,9
    Note
    Stainless Steel
    Explosion Class ATEX
    St2
    Minimum vessel size, pull (m3)
    0,9
    Kst (bar m/s)
    300
    Maximum reduced pressurem, Pred (bar)
    0,35
    B-Flap I K-ZKL-400-N-ST1 Explosion Isolation Flap Valve AISI 304

    ArtNo: 73008037

    Diameter (mm)
    400
    Weight (kg)
    77
    Min vessel size (m3)
    0,9
    Note
    Stainless Steel
    Explosion Class ATEX
    St1
    Minimum vessel size, pull (m3)
    0,9
    Kst (bar m/s)
    200
    Maximum reduced pressurem, Pred (bar)
    0,45
    B-Flap I K-ZKL-400-N-ST2 Explosion Isolation Flap Valve AISI 304

    ArtNo: 73008038

    Diameter (mm)
    400
    Weight (kg)
    77
    Min vessel size (m3)
    0,9
    Note
    Stainless Steel
    Explosion Class ATEX
    St2
    Minimum vessel size, pull (m3)
    0,9
    Kst (bar m/s)
    300
    Maximum reduced pressurem, Pred (bar)
    0,35
    B-Flap I K-ZKL-450-N-ST1 Explosion Isolation Flap Valve AISI 304

    ArtNo: 73008039

    Diameter (mm)
    450
    Weight (kg)
    88
    Min vessel size (m3)
    1,6
    Note
    Stainless Steel
    Explosion Class ATEX
    St1
    Minimum vessel size, pull (m3)
    1,6
    Kst (bar m/s)
    200
    Maximum reduced pressurem, Pred (bar)
    0,35
    B-Flap I K-ZKL-500-N-ST1 Explosion Isolation Flap Valve AISI 304

    ArtNo: 73008040

    Diameter (mm)
    500
    Weight (kg)
    101
    Min vessel size (m3)
    1,6
    Note
    Stainless Steel
    Explosion Class ATEX
    St1
    Minimum vessel size, pull (m3)
    1,6
    Kst (bar m/s)
    200
    Maximum reduced pressurem, Pred (bar)
    0,35
    B-Flap I K-ZKL-560-N-ST1 Explosion Isolation Flap Valve AISI 304

    ArtNo: 73008041

    Diameter (mm)
    560
    Weight (kg)
    157
    Min vessel size (m3)
    6
    Note
    Stainless Steel
    Explosion Class ATEX
    St1
    Minimum vessel size, pull (m3)
    6
    Kst (bar m/s)
    200
    Maximum reduced pressurem, Pred (bar)
    0,45
    B-Flap I K-ZKL-630-N-ST1 Explosion Isolation Flap Valve AISI 304

    ArtNo: 73008042

    Diameter (mm)
    630
    Weight (kg)
    180
    Min vessel size (m3)
    6
    Note
    Stainless Steel
    Explosion Class ATEX
    St1
    Minimum vessel size, pull (m3)
    6
    Kst (bar m/s)
    200
    Maximum reduced pressurem, Pred (bar)
    0,45

Accessories for this product 3

Position sensor ATEX version (zone 21, 22, no zone)
ArtNo: 73002043

B-Flap locking sensor kit (sensor NE5 + relay Type 917 + J box)

Position sensor standard version (no zone)
ArtNo: 73002168

B-Flap locking sensor kit (sensor 24VDC + cable 20m)

Position and Dirt sensors ATEX version (zone 21, 22, no zone)
ArtNo: 73008049

B-Flap position and dirt sensors kit (sensor NE5 + sensor CCB10 + relay Type 917 + J box)