Threaded Male Sight Windows
Model 341 - Low Pressure
Glass: Annealed Boro
Retaining Ring: Brass
Seals: Neoprene
Temp: 200F

Model    Material
   341    Brass

Reflectors are optional
  Model 341 Dimensions In Inches
Size A B C PSIG Wt oz.
1/4 5/8 17/32 3/4 50 2
3/8 7/8 15/32 7/8 50 2
1/2 1 19/32 7/8 50 2
3/4 1-1/8 11/16 1 50 3
1 1-3/8 15/16 1-1/8 50 4
1-1/4 1-7/8 1-1/4 1-1/4 32 6
1-1/2 2-1/8 1-1/2 1-1/4 24 8
2 2-3/8 1-1/2 1-1/4 23 20
Model 304 - Medium Pressure
Glass: Annealed Boro
Retaining Ring: Brass
Seals: Viton
®*
Temp: 400F

Model    Material
   304    303 Stainless
   316    316 Stainless
   320    Carbon Steel
  Model 304 Dimensions in Inches
Size A B C PSIG Wt. Oz.
3/8 7/8 15/32 1 300 2
1/2 1 19/32 1 275 2
3/4 1-1/8 11/16 1-1/8 250 3
1 1-3/8 15/16 1-1/4 200 4
1-1/4 1-7/8 1-1/4 1-3/8 150 8
1-1/2 2-1/8 1-9/16 1-3/8 100 12
2 2-1/2 1-1/4 1-1/2 100 1.3#
3 3-5/8 2 2-5/8 150 3.5#
Note: Model 316 and 320 are the same dimensions. Model 304 does not come in 3". Reflectors are optional
Model 322 - Medium Pressure
- Fused Glass
There is no glass-retaining ring or gasket due to the glass being fused to ID bore of the steel body. Glass is flush with hex face.

Model    Material
   322    Plated Steel
  Model 322 Dimensions in Inches
Size A B C PSIG @ 250F Wt Oz
1/4 5/8 11/32 5/8 125 1
3/8 3/4 7/16 23/32 125 1
1/2 15/16 9/16 25/32 125 2
3/4 1-1/16 3/4 1-1/16 125 2
1 1-3/8 15/16 1-1/16 125 3
1-1/4 1-3/4 1-3/16 1-7/32 125 6
1-1/2 2 1-7/16 1-7/32 125 7
2 2-3/4 1-7/8 1-9/32 125 10
Model 722 - High Pressure Fused Glass
There is no glass-retaining ring or gasket due to the glass being fused to ID bore of the steel body. Glass is flush with hex face.

Model    Material
   722    Plated Steel
    Model 722 Dimensions in Inches
Size A B C PSIG @ 69F Wt oz
1/4 5/8 5/16 5/8 2000 1
3/8 3/4 7/16 3/4 1850 1
1/2 15/16 19/32 7/8 1750 2
3/4 1-1/16 3/4 15/16 1500 2
1 1-3/8 15/16 1-1/16 1250 3
1-1/4 1-3/4 1-3/16 1-1/4 1000 6
1-1/2 2 1-7/16 1-1/4 750 7
2 2-3/4 1-7/8 1-3/8 500 10
  Models 304, 316, and 320 can have higher pressure and
  temperature ratings as an option with tempered
  borosilicate glass and stainless steel retaining rings. and   stainless steel retaining rings.
 
 
*Viton®
is a registered trademark of DuPont Dow Elastomers
 
Catalog Page 50
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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