John C. Ernst Co, Inc.
John C. Ernst Co, Inc.
21 Gail Court
Sparta, NJ 07871-3438
USA

Toll Free: 888.943.5000
Phone: 973.940.1600
Fax: 973.940.1620
Email: sales@johnernst.com
Website: www.johnernst.com
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Flapper
Carbon Steel
Unit of Measure

Specifications

Series

 N/A S12B

Former JCE Model Number

 N/A 102

Size

 N/A 1/2 in

End Connections

 N/A Female NPT

Type

 N/A Flapper

Window

 N/A Double

Visible Diameter/Length

 N/A 1.188 in

Weight

 N/A 3.00 lbs

Packaging Material

 N/A Cardboard Box

Flapper Material

 N/A 316 Stainless Steel

Standard Wetted Materials

Body Material

 N/A Carbon Steel

Gasket Material

 N/A Neoprene

Indicating Device

 N/A Flapper

Rotator/Flapper Pin

 N/A 316 Stainless Steel

Lens

 N/A Annealed Borosilicate

Standard Non-Wetted Materials

Glass Retaining Rings

 N/A Brass

Standard Ratings

Pressure Rating @ 250 ºF

 N/A 150 PSIG

Dimensions

Length

 N/A 3.75 in

Width

 N/A 3.13 in

Height

 N/A 2.50 in

Application Notes

Application Notes

 N/A
  • Saturated Steam Service: Upgraded gaskets and mica shields are recommended for saturated steam service. All ratings stated on our website and in our literature are non-steam ratings unless specified otherwise. Always contact our sales office for saturated steam ratings when needed.
  • Potable Water: This Bronze indicator is not acceptable for potable water
  • Vacuum Service: Acceptable except when using with hard gaskets
  • Gaseous Service: Not acceptable for lightweight gases
  • Corrosion: Before ordering, verify all materials of our sight flow indicators are compatible with the service media(s), intermittently used cleaners, the environment, and cleaning processes in conjunction with the temperatures and pressures of the application(s) and future applications. John C. Ernst Co. does not make chemical compatibility recommendations. Compatibility is the responsibility of the user and/or specifying party.

Replacement Parts

Replacement Parts

 N/A Please contact our sales department