Flapper : Horizontal & Upward Vertical Flow

Flapper models are recommended for applications involving transparent or slightly opaque solutions. Also, they are frequently specified for flow indication of gases. The position of the "hinged flapper" indicates variation in flow rate. When it is not necessary to visualize flow action, models without a flapper component are available. Plain (No-flapper) models are identified by model numbers carrying (NF) designations.

Threaded end connection styles:

Medium Pressure
150 PSIG Nominal Rated
100-S & 100-S(NF) 150 Class Full ASME Rated
100-SFA & 100-SFA(NF)

High Pressure
600, 1000, 2000, 3000, PSIG Nominal Rated
S-100HP-600 & S-100HP(NF)-600
S-100HP-1000 & S-100HP(NF)-1000
S-100HP-2000 & S-100HP(NF)-2000
S-100HP-3000 & S-100HP(NF)-3000

Flanged end connection styles:

Medium Pressure
150 Class Full ASME Rated
910-FA & 910-FA(NF)

High Pressure
300 Class Full ASME Rated
F-910HPA-300 & F-910HPA(NF)-300
600 Class Full ASME Rated
F-910HPA-600 & F-910HPA(NF)-600
900 & 1500 Class Full ASME Rated
Available. Consult factory for specific application