SERIES S12

DOUBLE WINDOW SIGHT FLOW INDICATOR - CLASS 150 ASME THREADED

Plain CS, Bronze or SS
Plain
Rotator CS, Bronze or SS
Rotator
Flapper CS, Bronze or SS
Flapper
Drip Tube CS, Bronze or SS
Drip Tube

(Was Model 101, 141, 161)

Indication Types:

  • Plain – No indicator for unobstructed view of media flowing in any direction
  • Rotator – Paddlewheel indicator used for clear media to enhance flow indication in any direction
  • Flapper – Side flapper to indicate horizontal flows in one direction for fast moving liquids
  • Drip Tube – For vertical downward flows at low flowrates

Standard Connections:

  • 1/2″ to 2″ NPT (Female)

Standard Ratings:

CLASS 150 ASME (PSIG)
Material100°F200°F250°F300°F400°F500°F
Carbon Steel285260245---
Bronze225210195---
Stainless Steel275235225215195170

Note: Ratings are limited by standard glass and gasket types. For higher ratings, refer to drawings or consult our Sales Dept.

Standard Materials:

Standard Materials
WettedNon-Wetted
Body
Material		IndicatorFlapper/Rotor PinGasketsGlassCushionsGlass RetainersFastenersNameplate
Carbon SteelPTFE Rotor316SSNeopreneTempered BorosilicateKlingersil® C-4401Carbon SteelPlated Carbon SteelStainless Steel
Bronze316SS Flapper
Stainless Steel316SS Drip TubeGylon® 3504

Options:

  • Buna-N, Fluorocarbon (Viton®), Ethylene Propylene (EPDM), Graphite, Klingersil® C-4401
  • Polycarbonate Lens
  • SS Glass Retaining Rings
  • Glass Shields for Steam and Caustic Applications (See Matrix)
  • C of C, MTR, NACE Certifications when requested at time of quotation

Application Notes:

  • 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: The Bronze indicator is not suitable for potable water
  • Vacuum Service: No
  • Gaseous Service: Not designed 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 LLC. does not make chemical compatibility recommendations. Compatibility is the responsibility of the user and/or specifying party.

Replacement Parts:

  • Please contact our sales department

Alternate Equipment:

Model Number Matrix
Model Number Matrix