BS | TROX HESCO Schweiz AG

Low-leakage inspection access door, variant BS-R

Low-leakage inspection access door, hinged on the left

Inspection window

Cylinder rim lock

Removable front locking lever (of double lever locking device)

Double lever locking device (interior lever, double leaf door)

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

Application

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

Description

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

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
R_W	R_W
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.

Type
BS Low-leakage inspection access door

Construction
R Right side
L Left side

Nominal size [mm]
B × H

Attachments
No entry: none
Z01 – Z03
Z05

Surface
       No entry: standard construction
P1       Powder-coated,       RAL CLASSIC colour
PS       Powder-coated, DB colour

       Gloss level
       RAL 9010 50 %
       RAL 9006 30 %
       All other RAL colours 70 %

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

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

Wall installation

① Frame
② Opening side
③ Fixing tab

Illustration shows right hinge

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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