Molded Annular Edge Glass Circles
Maxos Molded Annular Edge replacement glass has outstanding Quality and Clarity characteristics. It has a standard thickness of 3/4" and is made of borosilicate.

Model 540M - Annealed
This glass is used for the lower pressure applications

Model 541M - Tempered
This tempered glass is used for higher pressure applications.
 
Model Diameter PSIG
540M-1
540M-2
540M-3
540M-4
540M-5
4"
5"

6"

6-3/4"

8-3/8"
150
100

60
45
30
541M-1
541M-2
541M-3
541M-4
541M-5
4"
5"
6"
6-3/4"
8-3/8"
450
300
180
135
90
Flat Gauge Glass - Reflex & Transparent

 See Shields.
 See Gaskets.

  Also available is 30mm wide
  Reflex and Transparent
  Gauge Glass and Almax II
  Aluminosilicate.

Model 545 - Reflex
Width: 1.300-1.339"
Thickness: .661"-.689"
Flatness: .005"

Model 546 - Transparent
Width: 1.300-1.339"
Thickness: .661"-.689"
Flatness: .005"

Model 547 HP Transparent.
Same as 546 except Flatness: .002"
  Maxos Flat Gauge Glass is manufactured from a special 8488 formulated borosilicate glass, characterized by low coefficient of expansion, high chemical durability, and exceptional homogeneity.

These glasses are used in armored gauges as shown on page 37 and 38.
      Pressure and Temperature Ratings
  Model   Glass Size   Length Inches Steam Boiler, No Mica, Max Pressure at 470F Steam Boiler, Mica Protected Max Pressure at 608F Non-Steam Service Max Max Pressure at 100F
545-1
545-2
545-3
545-4
545-5
545-6
545-7
545-8
545-9
1
2
3
4
5
6
7
8
9
4-1/2
5-1/2
6-1/2
7-1/2
8-5/8
9-7/8
11
12-5/8
13-3/8
500
PSIG
    Mica Not used with Reflex Gauge Glass   4000
PSIG
546-1
546-2
546-3
546-4
546-5
546-6
546-7
546-8
546-9
1
2
3
4
5
6
7
8
9
4-1/2
5-1/2
6-1/2
7-1/2
8-5/8
9-7/8
11
12-5/8
13-3/8
500
PSIG
1000
SIG
4000
PSIG
547-1
547-2
547-3
547-4
547-5
547-6
547-7
547-8
547-9
1
2
3
4
5
6
7
8
9
4-1/2
5-1/2
6-1/2
7-1/2
8-5/8
9-7/8
11
12-5/8
13-3/8
500
PSIG
1500
PSIG
5000
PSIG

 
Catalog Page 44
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John C. Ernst Co., Inc.
Sparta, NJTel: 973-940-1600Fax: 973-940-1620
Toll Free: 1-888-463-7678

Email: info@johnernst.com

Mailing Address
21 Gail Court
Sparta, NJ 07871
Physical Address
21 Gail Court
Sparta, NJ 07871