Type BS

Inspection access doors for filter chambers, air handling units or other enclosures with machinery or equipment

Rectangular single leaf inspection access doors that are robust and ensure only minimal leakage even in case of large differential pressures

  • Minimum width of 300 mm, minimum height of 300 mm
  • Maximum width of 800 mm, maximum height of 800 mm
  • Maximum pressure loading of 1000 Pa, in closing direction, up to nominal size 600 × 600 mm 2000 Pa
  • Air leakage rate of approx. 0.6 l/s or 2 m³/h at 1000 Pa, up to nominal size 600 × 600 mm approx. 1.1 l/s or 4 m³/h at 2000 Pa
  • Double skin door leaf made of galvanised sheet steel and with mineral wool infill
  • Door frame made of angle sections
  • Double lever locking device, can be operated from both sides
  • APT rubber seal, temperature resistant up to 90 °C
  • Available in standard sizes and many intermediate sizes


Optional equipment and accessories

  • Cylinder rim lock, mortice lock, inspection window and removable exterior locking lever
  • Powder-coated for outdoor installation

Low-leakage inspection access door, variant BS-R 00136715_0

Low-leakage inspection access door, hinged on the left

  • Application
  • Description

Application

  • Low-leakage inspection access doors of Type BS are used as separating elements for air handling units, filter chambers, or enclosures for machinery or electrical equipment
  • Robust construction with very low air leakage rate even in case of large differential pressures
  • Powder-coated construction with increased corrosion resistance
  • Maximum pressure on the opening side is 1000 Pa, up to nominal size 600 × 600 mm 2000 Pa

Special characteristics

  • U-value: 1.02 W/(m²K) at 8 W/(m²K) for internal spaces (air not in motion) and 25 W/(m²K) for outside (air in motion)
  • Optional door frame without fixing tabs (-21) but with flange holes

Nominal sizes

  • B: 500, 600 mm (intermediate sizes: 300 – 800 mm, in increments of 1 mm)
  • H: 500, 600 mm (intermediate sizes: 300 – 800 mm, in increments of 1 mm)
  • Any combination of B × H

Variants

  • R: Right hinge
  • L: Left hinge
  • 11: Angle section frame with welded fixing tabs
  • 21: Angle section frame without fixing tabs

Parts and characteristics

  • Door with perimeter seal
  • Double lever locking device
  • Absorption material
  • Hinges
  • Frame

Attachments

  • Locks, inspection window, front locking lever: for the improvement and extension of the range of applications

Construction features

  • Double skin door leaf; skin thickness of 1 mm and 1.25 mm (opening side), respectively
  • Stiffeners at the level of the double lever locking devices
  • Double lever locking device, can be operated from both sides
  • Seal is temperature resistant up to 90 °C
  • Maximum pressure loading of 1000 Pa (in closing direction), up to nominal size 600 × 600 mm 2000 Pa; air leakage rate of approx. 0.6 l/s or 2 m³/h at 1000 Pa, up to nominal size 600 × 600 mm approx. 1.1 l/s or 4 m³/h at 2000 Pa

Materials and surfaces

  • Door leaf and stiffeners made of galvanised sheet steel
  • Absorption material is mineral wool
  • Door frame made of galvanised steel 50 × 50 × 4 mm
  • Double lever locking device made of aluminium diecast
  • APT rubber seal
  • P1: Powder-coated, RAL CLASSIC colour
  • PS: Powder-coated, NCS or DB colour


Mineral wool

  • To DIN 4102, fire rating class A2, non-combustible
  • RAL quality mark RAL-GZ 388
  • Biosoluble according to TRGS 905 and EU directive 97/69/EG
  • Inert to fungal and bacterial growth

Maintenance

  • Maintenance-free as construction and materials are not subject to wear
  • Contamination should be removed as it may lead to corrosion and to increased closed door air leakage

Technical information

Function, Technical data, Specification text, Order code, Related products

  • Function
  • Technical data
  • Specification text
  • Order code
Schematic illustration of BS 00106791_0.
① Door
② Frame (angle section 50 × 50 × 4 mm)
③ Absorption material
④ Seal
⑤ Double lever locking device


Functional description

Low-leakage inspection access doors are low-leakage separating elements for rooms or other enclosures.

When the door is being closed, i.e. when the double locking levers are being turned, the perimeter seal is fully pressed against the frame. As a consequence, the air leakage rate is extremely low even in case of high differential pressures.

Nominal sizes

300 × 300 – 800 × 800 mm

Maximum pressure on the opening side

1000 Pa, up to nominal size 600 × 600 mm 2000 Pa

Weighted sound reduction index

43 – 46  dB


Weighted sound reduction index

Centre frequency fm [Hz] Centre frequency fm [Hz]
125 250 500 1000 2000
RW RW
dB dB

26

38

44

46

46


Low-leakage inspection access doors as separating elements for air handling units, filter chambers, or enclosures for machinery or electrical equipment.

Ready-to-install component that consists of a door leaf with double lever locking device, absorption material, seal and hinges, and a frame.

Air leakage rate on the opening side is approx. 0.6 l/s or 2 m³/h at 2000 Pa.

Special characteristics

  • U-value: 1.02 W/(m²K) at 8 W/(m²K) for internal spaces (air not in motion) and 25 W/(m²K) for outside (air in motion)
  • Optional door frame without fixing tabs (-21) but with flange holes

Materials and surfaces

  • Door leaf and stiffeners made of galvanised sheet steel
  • Absorption material is mineral wool
  • Door frame made of galvanised steel 50 × 50 × 4 mm
  • Double lever locking device made of aluminium diecast
  • APT rubber seal
  • P1: Powder-coated, RAL CLASSIC colour
  • PS: Powder-coated, NCS or DB colour


Mineral wool

  • To DIN 4102, fire rating class A2, non-combustible
  • RAL quality mark RAL-GZ 388
  • Biosoluble according to TRGS 905 and EU directive 97/69/EG
  • Inert to fungal and bacterial growth

Technical data

  • Nominal sizes: 300 × 300 – 800 × 800 mm
  • Maximum pressure on the opening side is 1000 Pa, up to nominal size 600 × 600 mm 2000 Pa
  • Weighted sound reduction index: 43 – 46  dB

This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design programme.

Order example: BS–L/500×650/Z03

Variant

Left hinge

Nominal size

500 × 650 mm

Attachments

With inspection window

Surface

Standard construction


 

Dimensions and weight, Product details

  • Dimensions and weight
  • Product details
BS 00147280_0

Illustration shows right hinge

BS, weights

H B [mm]
H 400 500 600 800
mm kg

400

12

15

18

24

500

13

16

19

25

600

13

17

20

26

800

14

18

21

27


Double lever locking device on angle section door frame 00103903_0


Installation details

  • Installation details

Installation and commissioning

  • Align the frame precisely before mortaring it in
  • When the door is closed, the perimeter seal must be in full contact with the frame

No. of fixing tabs on each side

Sizes n
mm Qty

300 – 499

1

500 – 800

2


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For general question regarding products or services you can also call:
Tel.: +60 6 678 8188 | Fax: +60 6 678 8288 (388)