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By certification 
Design Standard:
Basic Design: BS 5351
Face to Face (End to End): ANSI B16.10, EN 558-1
End Connection: ANSI B16.5, B16.11, B1.20.1
Test: API 598, BS 6755, API 607
Products Range:
Size: 1/2" ~ 4"
Size: 1/2" ~ 4"; DN15 - DN100
Rating: ANSI 800lb ~ 2500lb; 1000 WOG ~ 3000 WOG
Body Materials: Carbon steel (A105, LF2), Stainless steel (F304, F316, F321, F51, F53)
Trim (Ball) : A105+ENP, 13Cr, F304, F316
Seat: PTFE, RPTFE, TFM1600, DEVLON, MOLON, Metal/Metal, NYLON, PEEK, VITON
End Connection: S.W. (Socket Welded) or NPT.
Operation: Manual / Lever, Gear, Pneumatic Actuator, Electric Actuator
Design Feature:
Full port or Reduce port
Fire safe design
Blowout-proof stem
Anti-static
Low emission control
ISO 5211 top flange
Optional locking device
Application:
Refinery
Chemical
Petrochemical
Power plant
Pharmaceutical
Corrosive fluids, Natual Gas Pipelines, Oil Pipelines, Refineries, Water pump stations
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