Standard Features
Quarter turn operation
Full port for maximum flow and minimum pressure drop
Can be operated in partial open position for flow control
Double seal allows the valve to be operated in both directions
Blowout proof stem
600 PSIG non-shock cold working pressure rating for 1/4″ to 2″ size
450 PSIG non-shock cold working pressure rating for 2 1/2″ to 4″ size
1000 PSIG non-shock cold working pressure (691BSS)
Can be used for air service
691B/BSS is lockable with a padlock
691A is spring loaded auto return
Construction Details
Body: Forged brass
Ball: Hard chrome plated
Seal: PTFE 
Certifications & Listings
UL 842 listed for flammable liquids (except 691BSS); UL 125 listed for LP gas shut-off (except 691BSS); CSA Listed (File No. 112439, Model S.95) (except 691BSS)