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37 ■ Easy Piping Maintenance It is not necessary to remove fluid from the pipe line. ■ Strong In Pulsating Pressure    3 Times Stronger than a Major Competitor. ■ Same Features as Type57  a) Protection for Over-Tightening Constant Stem Torque. b) New Designed Disc and Seat (Liner). ・ Longer Life   ・ Lower Sealing Torque   ・ Higher Cv Value c) Plastic Gear Box.   ・ Extremely Corrosion Resistant   ・ Easy Operation d) Stem Retainer (Safety device). ・ Prevention of Removal of     Stem under Pressure (Safe Installation of Accessories) BUTTERFLY VALVE TYPE 57L (Lug Style) FEATURES SPECIFICATIONS Body material Standard Working Temperature ℃(°F) Max. Working Pressure MPa{kgf/cm2}[PSI} 80mm - 250mm (3inch - 10inch) Poly dieyclo penta diene (PDCPD) JIS, DIN −5 - 100 (20 - 210) 1.0MPa{10.2kgf/cm2}[150PSI] WORKING PRESSURE VS. TEMPERATURE 1.0 0.5 0.0 -5 (20) 60 80 100 120 [150] [70] -40 -20 0 20 40 (-40) (-5) (30) (70) (105) (140) (175) (210) (250) Temperature℃(゜F) PDCPD /PVDF PDCPD /PVDF PDCPD /PP PDCPD /PP LUG-BUTTERFLY VALVE TYPE57L(WAFER) Nominal Size:80mm(3inch) - 250mm(10inch) Working Pressure MPa[PSI] {10.2} {5.1} -40 -20 0 20 40 60 80 100 120 (-40) (-5) (30) (70) (105) (140) (175) (210) (250) EPDM FKM NBR UR CSM FKM-F FKM-C ●PDCPD - JIS and DIN Standard DIAPHRAGM VALVE BUTTERFLY BALL VALVE VALVE SWING CHECK VALVE BALL CHECK, BALL FOOT VALVE AUTOMATIC WATER GATE VALVE GAUGE VALVE STOP VALVE FEEDING VALVE ROTARY ANGLE VALVE CONSTANT FLOW ALFALFA VALVE VALVE Y-SEDIMENT NEEDLE VALVE STRAINER AIR RELEASE VALVE WAFER CHECK VALVE