MAXOS

SHANMAN ENINEERING Sdn Bhd is proud to announce that we have been given the task and responsibility to assist in Sales and Marketing and together with technical support on behalf of AUER Lighting Gmbh for their range of MAXOS Safety Sight and Level Gauge Glasses Special-tempered Made in Germany. Shanman will also use Maxos Products for their level gauge housings produced. Primarily Shanman Will cover S E Asia and Oceania Markets along with neighboring countries. Please get in touch with us for your requirements.

The complete safety sight and
level gauge glass program

MAXOS® safety sight and level gauge glasses have proved themselves universally where visual process control is essential. This includes pressure vessels subjected to thermal and chemical loads and liquid level gauge applications.

A high safety level is secured through the use of special borosilicate glass of high chemical durability, exceptional purity and homogeneity. The low thermal expansion of our SUPRAX® 8488 borosilicate glass, combined with thermal prestressing (tempering) creates a high resistance to sudden temperature changes.

The material properties values and tight dimensional tolerances are guaranteedby production and quality controls. With these exceptional safety characteristics, MAXOS® safety sight and level gauge glasses can be used under extreme operational conditions. It is therefore mainly these safety aspects which influence responsible technicians again and again to choose MAXOS®.

MAXOS® product range

Special tempered reflex and transparent level gauge glasses and disc
sight glasses can be supplied in accordance to:

• DIN 7080/7081
• BS 3463
• JIS B 8211
• MIL – G – 16356 D

• Auer USA specification
• H igh pressure
• C ustomer specification
• Aluminosilicate glass on request

Glass type SUPR AX® 8488

Coefficient of expansion α 20 °C/300 °C 4.3 x 10–6 K–1
Transformation temperature 540 °C
Glass temperature for the viscosities dPas (Poise) 1013.0 560 °C
107.6 800 °C
104.0 1200 °C
Density at 25 °C 2.3 g/cm3
Modulus of elasticity 67 x 103 N/mm2
Poisson‘s ratio μ 0.20
Thermal conductivity λ at 90 °C 1.2 W/ M-K
Refractive index nd (λ = 587.6 nm) 1.484
Photoelastic parameter K 3.2 x 10–6 mm2/N
Chemical
characteristics		 Hydrolytic
resistance		 Acid
resistance		 Alkali
resistance
Test acc. to DIN ISO 719 DIN ISO 1776 DIN ISO 695
max. abrasion
acc. to DIN ISO		 0.1 <100 μg Na2O
each 100 cm2		 >75–175 mg
each 100 cm2
MAXOS®
max. abrasion		 0.050 <60 μg Na2O
each 100 cm2		 <100 mg
each 100 cm2
MAXOS® HGB 1 – class A2

The abrasion of MAXOS® glass in watery phase for
several temperatures as a function of the ph-value.

MAXOS® – a registered trademark of Auer Lighting GmbH
SUPRAX® – a registered trademark of SCHOTT AG

MAXOS ® Level Gauge Glasses

Long form reflex and transparent

Bending strength is determined by the surface compressive stress and the
inherent resistance of the glass. The inherent resistance is heavily dependent
upon the surface quality.

For safety reasons, the stress to the glasses caused by internal forces, thermal stress and vessel pressure have to be totally absorbed by the surface compressive stress so that a tensile stress of the glass surface is prevented.

Bending strength (typical values)

Standard level gauge glasses
≥ 150 N/mm2 21,000 psi
Average
170 N/mm2 25,000 psi		 High pressure level gauge glasses
≥ 180 N/mm2 26,000 psi
Average
200 N/mm2 29,000 psi

Temperature

Thermal shock resistance Δ T 265 K
Max. permissible temperature 300 °C (572 °F)
Protected with mica 320 °C (608 °F)

Application conditions Maximum permissible pressure Maximum permissible
temperature
bar psi °C °F
Saturated steam or hot water in direct contact with reflex or transparent sight glasses 35 500 243 470
Saturated steam or hot water in contact with transparent sight glasses protected with mica 103 1,500 320 608
Non-corrosive, non-steam service and no technically significant glass attack, with reflex or transparent glasses 280 4,000 320 608
Transparent sight glasses in contact with medias with no technically significant glass attack 345 5,000 38 100
High pressure transparent sight glasses in special armatures (gauges) 414 6,000 38 100

Special tempered MAXOS® glass under polarized light.

MAXOS ® Disc Sight Glasses

Technical charateristics

Bending strength ≥ 160 N/mm2 23,000 psi
Surface compressive stress ≥ 100–140 N/mm2 14,500–20,000 psi
Parallelism ≤ 0.20 mm 0.008 inches
Flatness*) Diameter: up to 100 mm ≤ 0.05
above 100 up to 150 mm ≤ 0.08
above 150 up to 200 ≤ 0.12
above 200 mm ≤ 0.15
Thermal shock resistance Δ T 265 K
Max. permissible temperature 300 °C 572 °F
Protected with mica 320 °C 608 °F

*) Measurements of flatness are taken only in the sealing area.

Dimensional tolerances

(DIN 7080)

Diameter

up to 135 mm        ± 0.5 mm
150 to 200 mm     ± 0.8 mm
above 200 mm     ± 1.0 mm

Thickness

up to 20 mm                + 0.50 mm / – 0.25 mm
above 20 mm               + 0.80 mm / – 0.40 mm

Calculation of the glass thickness

All MAXOS® glasses are marked with a
production code number.

Available sizes
Special dimensional design on request, e.g. Ø min. 30 – max. 265 mm
and thickness min. 10 – max. 30 mm.

Dimensions
d1 x s
(mm)		 Inspection
aperture
d2 (mm)		 Permissible
pressure
in bar		 Dimensions
d1 x s
(inch)		 Inspection
aperture
d2 (inch)		 Permissible
pressure
in psi
30 x 15 20 200 1.181 x 0.591 0.787 2900
31.6 x 12.75 20 150 1.244 x 0.502 0.787 2175
34 x 17 24 200 1.339 x 0.669 0.945 2900
35 x 7 25 25 1.378 x 0.276 0.984 363
40 x 10 30 40 1.575 x 0.394 1.181 580
40 x 12 30 50 1.575 x 0.472 1.181 725
45 x 10 32 40 1.772 x 0.394 1.260 580
45 x 12 32 50 1.772 x 0.472 1.260 725
50 x 10 35 25 1.969 x 0.394 1.378 363
50 x 12 35 40 1.969 x 0.472 1.378 580
55 x 10 40 25 2.165 x 0.394 1.575 363
60 x 10 45 16 2.362 x 0.394 1.772 232
60 x 12 45 25 2.362 x 0.472 1.772 363
60 x 15 45 40 $2.362 x 0.591 1.772 580
60 x 20 45 95 2.362 x 0.787 1.772 1377
63 x 8 48 8 2.480 x 0.315 1.890 116
63 x 10 48 16 2.480 x 0.394 1.890 232
63 x 12 48 25 2.480 x 0.472 1.890 363
63 x 15 48 40 2.480 x 0.591 1.890 580
65 x 10 50 12 2.559 x 0.394 1.969 174
65 x 15 50 40 2.559 x 0.591 1.969 580
70 x 12 55 16 2.756 x 0.472 2.165 232
70 x 15 55 25 2.756 x 0.591 2.165 363
75 x 12 60 16 2.953 x 0.472 2.362 232
80 x 10 65 10 3.150 x 0.394 2.559 145
80 x 12 65 16 3.150 x 0.472 2.559 232
80 x 15 65 25 3.150 x 0.591 2.559 363
80 x 20 65 40 3.150 x 0.787 2.559 580
90 x 10 70 8 3.543 x 0.394 2.756 116
92 x 10 72 8 3.622 x 0.394 2.835 116
95 x 10 75 6 3.740 x 0.394 2.953 87
95 x 15 75 16 3.740 x 0.591 2.953 232
100 x 10 80 7 3.937 x 0.394 3.150 101
100 x 12 80 10 3.937 x 0.472 3.150 145
100 x 15 80 16 3.937 x 0.591 3.150 232
100 x 20 80 25 3.937 x 0.787 3.150 363
100 x 25 80 40 3.937 x 0.984 3.150 580
110 x 12.5 85 10 4.331 x 0.492 3.346 145
113 x 15 88 10 4.449 x 0.591 3.465 145
115 x 15 90 10 4.528 x 0.591 3.543 145
120 x 15 95 10 4.724 x 0.591 3.740 145
125 x 15 100 10 4.921 x 0.591 3.937 145
125 x 20 100 16 4.921 x 0.787 3.937 232
125 x 25 100 25 4.921 x 0.984 3.937 363
125 x 30 100 40 4.921 x 1.181 3.937 580
130 x 15 105 10 5.118 x 0.591 4.134 145
135 x 25 110 25 5.315 x 0.984 4.331 363
150 x 10 125 2 5.906 x 0.394 4.921 29
150 x 15 125 8 5.906 x 0.591 4.921 116
150 x 20 125 10 5.906 x 0.787 4.921 145
150 x 25 125 16 5.906 x 0.984 4.921 232
150 x 30 125 25 5.906 x 1.181 4.921 363
175 x 20 150 10 6.890 x 0.787 5.906 145
175 x 25 150 16 6.890 x 0.984 5.906 232
175 x 30 150 25 6.890 x 1.181 5.906 363
200 x 20 175 8 7.874 x 0.787 6.890 116
200 x 25 175 10 7.874 x 0.984 6.890 145
200 x 30 175 16 7.874 x 1.181 6.890 232
250 x 20 225 4 9.843 x 0.787 8.858 58
250 x 25 225 8 9.843 x 0.984 8.858 116
250 x 30 225 10 9.843 x 1.181 8.858 145
265 x 30 240 8 10.433 x 1.181 9.449 116