80 & 81 Series Resilient Seated Butterfly Valves
Resilient Seated Butterfly Valve
81 Series: LUG, CARTRIDGE SEAT TYPE
80 Series: WAFER, CARTRIDGE SEAT TYPE
Size : Cartridge design seat type : 2″~24″
Type: Wafer, Lug
NSF / ANSI 61, 372 Certified
Pressure Rating: Class 125/150
Body Material: Cast Iron, Ductile Iron, and Stainless Steel.
Seat Type: Cartridge Type
Operation: Lever, Gear, Actuators
Drilling: ANSI 125/150, JIS 10K, DIN PN 10/16
▪One-piece body construction of Ductile Iron, Cast Iron, or Stainless
Steel design complies with API 609, MSS SP 67, and ISO 5752.
▪ISO 5211 mounting pad with square or key type stem shaft permits direct mount actuation for both Manual (Lever & gear), pneumatic and electric operations.
▪Teflon stem bushing to assure long life even during an extended period of activity.
Lowers operating torque for easy manual operation and maximize shaft support.
▪High strength two-piece stem eliminates taper pins or disc screws which often fail prematurely through abrasion, corrosion or fatigue.
▪All disc castings are spherically machined & polished for extended seat life
& bubble tight shut off.
▪Seat type available in both encapsulated phenolic or Aluminum backed
Cartridge seat. Cartridge design seat permits easy to change without special tools.
▪Reduced Disc option for lower pressure applications, requiring lower torque and smaller actuators.
▪Conform to API 598 and MSS SP 61. Shell tested to 150% and seat tested
to 110% of maximum working pressure.
Every ST&H valve is pressure tested & Quality Inspected.
▪Full Rated Disc, Lug body valves are rated for 150 PSI in dead-end service.
Top flange mounting pad: ISO 5211
Basic Design: API 609, MSS-SP-67, BS 5155, ISO 5752, DIN 3202
Shell/Seat Test: API 598, MSS-SP-61
Shell Test : DI (400 psig), CI (350 psig)
Closure Test : 165 PSIG
Full Disc Max. Pressure Shutoff Rating: 150 PSI
Reduced Disc Max Pressure Shutoff Pressure Rating: 50 PSI