ST | TROX HESCO Schweiz AG

Low-leakage steel door, variant ST-R/Z15

Steel door with inspection window, pressure relief valve and cylinder rim lock(Profile cylinder on the opening side, cylinder rim lock on the closing side)

Inspection window

Cylinder rim lock

Pressure relief valve

Removable front locking lever (of double lever locking device)

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

ST

Single and double leaf hinged doors for plant rooms, storage rooms, air handling units, filter chambers, or enclosures for machinery or electrical equipment

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

Maximum width of 1100 mm, maximum height of 2115 mm
Maximum pressure loading of 1000 Pa, in closing direction; reinforced construction for up to 2000 Pa
Air leakage rate of approx. 0.6 l/s or 2 m³/h at 1000 Pa (for each door leaf)
Double skin door leaf made of galvanised sheet steel and with mineral wool infill
Door frame made of angle sections or U-channel sections
Two double lever locking devices, 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

Sound insulating lining
Reinforced construction
Any combination of cylinder rim lock, mortice lock, pressure relief valve, inspection window and removable exterior locking levers
Powder-coated for outdoor installation

Application

Application

Low-leakage steel doors of Type ST are used as separating elements for walk-in plant rooms, storage rooms, 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 (2000 Pa for reinforced construction)

Special characteristics

Variants with additional sound insulating lining (X construction variants) provide good sound absorption
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

ST (single leaf)

B: 500, 600, 800 and 940 mm (intermediate sizes 400 – 1100 mm in increments of 1 mm)
H: 1500, 1600, 1800 and 1940 mm (intermediate sizes 800 – 2115 mm in increments of 1 mm)
Any combination of B × H

ST-D (double leaf)

B: 1080, 1280, 1680 and 1960 mm (intermediate sizes 1080 – 2280 mm in increments of 1 mm)
H: 1500, 1600, 1800 and 1940 mm (intermediate sizes 800 – 2115 mm in increments of 1 mm)

Any combination of B × H

Description

Variants

ST: Low-leakage steel door
ST-V: Low-leakage steel door with reinforced leaf
ST-X: Low-leakage steel door with sound insulating lining
ST-X-V: Low-leakage steel door with sound insulating lining and reinforcing elements
ST-D: Double leaf low-leakage steel door
ST-D-V: Double leaf low-leakage steel door with reinforced leaves
ST-D-X: Double leaf low-leakage steel door with sound insulating lining
ST-D-X-V: Double leaf low-leakage steel door with sound insulating lining and reinforcing elements
R: Right hinge
L: Left hinge

Parts and characteristics

Door with perimeter seal
Double lever locking devices
Absorption material
Hinges
Door frame

Attachments

11: Angle section frame with welded fixing tabs
13: U-channel frame 115 × 40 × 4 mm
15: U-channel frame 240 × 40 × 4 mm with welded fixing tabs
21: Angle section frame without fixing tabs
Locks, inspection window, pressure relief valve, 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
Additional central stiffener from H = 1800 mm
Double lever locking devices can be operated from both sides
Seal is temperature resistant up to 90 °C
Maximum pressure loading of 1000 Pa, in closing direction

Materials and surfaces

Door leaf and stiffeners made of galvanised sheet steel
Reinforced construction (V): Screw-fixed stiffeners
Absorption material is mineral wool
Door frame made of galvanised steel
Double lever locking devices made of aluminium diecast
APT rubber seal
Sound absorbing Bitumen K57 slabs
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 and hence hygienically safe according to the German TRGS 905 (Technical Rules for Hazardous Substances) and EU directive 97/69/EC
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 ST 00106772_0..

① Door
② Door frame (angle section 50 × 50 × 4)
③ Skin thickness 1 mm
④ Skin thickness 1.25 mm
⑤ Stiffener (additional central stiffener from H = 1800 mm)
⑥ Absorption material
⑦ Seal
⑧ Double lever locking device

Functional description

Low-leakage steel 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 (single leaf)	400 × 800 to 1100 × 2115 mm
Nominal sizes (double leaf)	1080 × 800 to 2280 × 2115 mm
Maximum pressure on the opening side	1000 Pa (reinforced construction: 2000 Pa)
Weighted sound reduction index (with sound absorbing infill)	Single leaf door 43 – 46 dB, double leaf door 44 – 47 dB, doors on both sides of the wall opening 58 – 61 dB

Weighted sound reduction index

Variant	Centre frequency fm [Hz]
Variant	125	250	500	1000	2000
Variant	R_W
Variant	dB
ST-X, ST-X-V	26	38	44	46	46
ST-D-X, ST-D-X-V	28	41	45	49	46
2 × ST-X, ST-X-V, doors on both sides of the wall opening	48	52	59	62	65

Low-leakage steel doors as separating elements for walk-in plant rooms, storage rooms, 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 devices, 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 1000 Pa (single leaf door).

Special characteristics

Variants with additional sound insulating lining (X construction variants) provide good sound absorption
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
Reinforced construction (V): Screw-fixed stiffeners
Absorption material is mineral wool
Door frame made of galvanised steel
Double lever locking devices made of aluminium diecast
APT rubber seal
Sound absorbing Bitumen K57 slabs
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 and hence hygienically safe according to the German TRGS 905 (Technical Rules for Hazardous Substances) and EU directive 97/69/EC
Inert to fungal and bacterial growth

Technical data

Nominal sizes (single leaf): 400 × 800 – 1100 × 2115 mm
Nominal sizes (double leaf): 1080 × 800 – 2280 × 2115 mm
Maximum pressure on the opening side: 1000 Pa (reinforced construction: 2000 Pa)
Weighted sound reduction index (with sound absorbing infill): single leaf door 43 – 46 dB, double leaf door 44 – 47 dB, on the left and right of the wall opening 58 – 61 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
ST Low-leakage steel door

Hinge
R Right side
L Left side

Sound insulating lining
No entry: none
X With

Construction of door
No entry: standard construction
V Reinforced door leaf

Nominal size [mm]
B × H

Door frame
11       Angle section 50/50/4, with welded fixing tabs
13       U-channel 115/40/4, with welded fixing tabs
15       U-channel 240/40/4, with welded fixing tabs
21       Angle section, without welded fixing tabs (alternatively with flange holes, surcharge)

Attachments
No entry: none
Z01 – Z23

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: ST–R/800×1800/21/Z06

Hinge	Right side
Sound insulating lining	Without
Construction of door	Standard construction
Nominal size	800 × 1800 mm
Door frame	Angle section, without fixing tabs
Attachments	Standard construction with inspection window and cylinder rim lock
Surface	Standard construction

Order example: ST–D/1680×1800/21/Z06

Number of door leaves	Double leaf low-leakage steel door
Sound insulating lining	Without
Construction of door	Standard construction
Nominal size	1680 × 1800 mm
Door frame	Angle section, without fixing tabs
Attachments	Standard construction with inspection window and cylinder rim lock
Surface	Standard construction

Variants, Dimensions and weight, Product details

Low-leakage steel door, variant ST-R/Z15

Steel door with inspection window, pressure relief valve and cylinder rim lock(Profile cylinder on the opening side, cylinder rim lock on the closing side)

Variant

Low-leakage steel door

Parts and characteristics

Door with perimeter seal
Double lever locking devices
Absorption material
Hinges
Door frame

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
Additional central stiffener from H = 1800 mm
Double lever locking devices can be operated from both sides
Seal is temperature resistant up to 90 °C
Maximum pressure loading of 1000 Pa, in closing direction); air leakage rate of 0.6 l/s or 2 m³/h

ST-V

Variant

Low-leakage steel door with reinforced leaf

Parts and characteristics

Reinforced door leaf with perimeter seal
Double lever locking devices
Absorption material
Hinges
Door frame

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
Additional central stiffener from H = 1800 mm
Screw-fixed stiffeners
Double lever locking devices can be operated from both sides
Seal is temperature resistant up to 90 °C
Maximum pressure loading of 2000 Pa, in closing direction); air leakage rate of 1.1 l/s or 4 m³/h

ST-X

Variant

Low-leakage steel door with sound insulating lining

Parts and characteristics

Door with perimeter seal
Double lever locking devices
Absorption material
Sound insulating boards fitted to the inside of the door skins
Hinges
Door frame

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
Additional central stiffener from H = 1800 mm
Double lever locking devices can be operated from both sides
Seal is temperature resistant up to 90 °C
Maximum pressure loading of 1000 Pa, in closing direction); air leakage rate of 0.6 l/s or 2 m³/h

ST-X-V

Variant

Low-leakage steel door with sound insulating lining and reinforcing elements

Parts and characteristics

Reinforced door leaf with perimeter seal
Double lever locking devices
Absorption material
Sound insulating boards fitted to the inside of the door skins
Hinges
Door frame

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
Additional central stiffener from H = 1800 mm
Screw-fixed stiffeners
Double lever locking devices can be operated from both sides
Seal is temperature resistant up to 90 °C
Maximum pressure loading of 2000 Pa, in closing direction); air leakage rate of 1.1 l/s or 4 m³/h

ST-D

Variant

Double leaf low-leakage steel door

Parts and characteristics

Two door leaves, both with a perimeter seal
Centre mullion
Double lever locking devices
Absorption material
Hinges
Door frame

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
Additional central stiffener from H = 1800 mm
Double lever locking devices can be operated from both sides
Seal is temperature resistant up to 90 °C
Maximum pressure loading of 1000 Pa, in closing direction); air leakage rate of 1.1 l/s or 4 m³/h

ST-D-V

Variant

Double leaf low-leakage steel door with reinforced leaves

Parts and characteristics

Two door leaves, both with reinforcing elements and a perimeter seal
Centre mullion
Double lever locking devices
Absorption material
Hinges
Door frame

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
Additional central stiffener from H = 1800 mm
Screw-fixed stiffeners
Double lever locking devices can be operated from both sides
Seal is temperature resistant up to 90 °C
Maximum pressure loading of 2000 Pa, in closing direction); air leakage rate of 2.2 l/s or 8 m³/h

ST-D-X

Variant

Double leaf low-leakage steel door with sound insulating lining

Parts and characteristics

Two door leaves, both with a perimeter seal
Centre mullion
Double lever locking devices
Absorption material
Sound insulating boards fitted to the inside of the door skins
Hinges
Door frame

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
Additional central stiffener from H = 1800 mm
Double lever locking devices can be operated from both sides
Seal is temperature resistant up to 90 °C
Maximum pressure loading of 1000 Pa, in closing direction); air leakage rate of 1.1 l/s or 4 m³/h

ST-D-X-V

Variant

Double leaf low-leakage steel door with sound insulating lining and reinforcing elements

Parts and characteristics

Two door leaves, both with reinforcing elements and a perimeter seal
Centre mullion
Double lever locking devices
Absorption material
Sound insulating boards fitted to the inside of the door skins
Hinges
Door frame

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
Additional central stiffener from H = 1800 mm
Screw-fixed stiffeners
Double lever locking devices can be operated from both sides
Seal is temperature resistant up to 90 °C
Maximum pressure loading of 2000 Pa, in closing direction); air leakage rate of 2.2 l/s or 8 m³/h

① Stiffeners (additional central stiffener from H = 1800 mm)

Illustration shows right hinge

ST, width, dimensions

B	B₁
mm	mm
<500	B + 30
500	530
600	630
800	830
940	970

ST, height, dimensions

H	H₁	X
mm	mm
<1500	H + 30	249.5
1500	1530	349.5
1600	1630	349.5
1800	1830	349.5
1940	1970	349.5

ST-D, width, dimensions

B	B₁	B₂
mm	mm
B < 1080	(B – 20) ∕ 2	B + 30
1080	530	1110
1280	630	1310
1680	830	1710
1960	970	1990

ST, ST-V, weights

H	B [mm]
H	500	600	800	940
mm	kg
1500	33	40	53	62
1600	34	41	54	64
1800	35	42	56	66
1940	36	43	57	67

ST-X, ST-X-V, weights

H	B [mm]
H	500	600	800	940
mm	kg
1500	36	43	58	68
1600	37	44	59	70
1800	38	46	61	71
1940	39	46	62	73

ST-D, ST-D-V, weights

H	B [mm]
H	1080	1280	1680	1960
mm	kg
1500	66	78	102	120
1600	68	81	106	123
1800	70	83	109	127
1940	72	86	113	131

ST-D-X, ST-D-X-V, weights

H	B [mm]
H	1080	1280	1680	1960
mm	kg
1500	72	86	113	131
1600	75	88	116	135
1800	77	91	119	139
1940	80	95	124	145

Double lever locking device on angle section door frame

Installation details

Installation of angle section door frame

① Angle section door frame
② Opening side
③ Fixing tabs (flange holes as an alternative)

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

Angle section frame, no. of fixing tabs or flange holes

H	ST	ST-D
mm	–
1500	6	8
1600	6	8
1800	8	10
1940	8	10

U-channel door frame, dimensions

Order code detail	A
Order code detail	mm
13	115
15	240

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