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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S12 Series Flapper Type Carbon Steel, Stainless Steel or Bronze Sight Flow Indicators
Unit of Measure
Items 100A&B Series - Double Window Sight Flow Indicator - Plain
S12B-CA-02A-AAX-5
Sight Flow Indicator 		100A&B Series - Double Window Sight Flow Indicator - Rotator
S12B-CB-02A-AAX-5
Sight Flow Indicator 		100A&B Series - Double Window Sight Flow Indicator - Rotator
S12B-DB-02A-FAX-5
Sight Flow Indicator 		100A&B Series - Double Window Sight Flow Indicator - Drip Tube
S12B-CM-02A-AAX-5
Sight Flow Indicator 		100A&B Series - Double Window Sight Flow Indicator - Drip Tube
S12B-DM-02A-FAX-5
Sight Flow Indicator
Series N/A S12B
Size N/A 1/4 in
End Connections N/A Female NPT
Body Material N/A Bronze N/A Bronze N/A 316 Stainless Steel N/A Bronze N/A 316 Stainless Steel
Gasket Material N/A Neoprene N/A Neoprene N/A PTFE 3545 N/A Neoprene N/A PTFE 3545
Rotor Material N/A N/A 316 Stainless Steel N/A 316 Stainless Steel N/A N/A
Indicating Device N/A Plain N/A Rotor N/A Rotor N/A Drip Tube N/A Drip Tube
Type N/A Plain N/A Rotor N/A Rotor N/A Drip Tube N/A Drip Tube
Window N/A Double
Rotator/Flapper Pin N/A None N/A 316 Stainless Steel N/A 316 Stainless Steel N/A None N/A None
Lens N/A Annealed Borosilicate
Glass Retaining Rings N/A Brass
Visible Diameter/Length N/A 0.81 in
Pressure Rating @ 250 ºF N/A 150 PSIG N/A 150 PSIG N/A N/A 150 PSIG N/A
Length N/A 3.00 in
Width N/A 2.00 in
Height N/A 1.75 in
Weight N/A 1.50 lbs
Packaging Material N/A Cardboard Box
Options N/A
  • Buna-N, Fluorocarbon (FKM), Ethylene Propylene (EPDM), PTFE 3504/3545, Graphite, Non-Asbestos C4401 and Neoprene Gaskets
  • Tempered Borosilicate, Annealed Borosilicate and Polycarbonate
  • Gaseous Indicators
  • Exotic Body Materials
  • Various Lens Materials
  • SS Glass Retaining Rings
  • Socket Weld Connections
  • Butt Weld Connections (need schedule and length)
  • Glass Shields for Steam and Caustic Applications
  • C of C, MTR, NACE Certifications when requested at time of quotation
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 N/A Please contact our sales department
Pressure Rating @ 500 ºF N/A N/A N/A 150 PSIG N/A N/A 150 PSIG
Pressure Rating @ 100 ºF N/A
Flapper Material N/A
Drip Tube Material N/A N/A N/A N/A 316 Stainless Steel N/A 316 Stainless Steel