Double Eccentric Butterfly Valve with Pneumatic Actuator with PTFE Lined

• Driving Mode: Pneumatic
• Connection Form: Flange
• Structure: Centre Sealing
• Seal Form: Auto Sealed
• Valve Stem: Normal
• Work Pressure: Low Pressure (Pn<1.6mpa)
• Model NO.: B088
• Working Temperature: Normal Temperature (-40°C<T<120°C)
• Material of Seal Surface: Metal Hard Sealed
• Valve Body: Casting
• Application: Industrial Usage, Water Industrial Usage, Household Usage
• Size: Dn700-Dn1200
• Transport Package: Excellent Plywood Cases
• Specification: CE, SGS, ISO, API
• Trademark: Afcon
• Origin: Dezhou, Shandong Province
• Production Capacity: 5000PCS/Month

Product Description

Double Eccentric Butterfly Valve with Pneumatic Actuator with PTFE lined
The double offset design assures reduced seat wear and bidirectional, zero leakage shut off throughout the full pressure range.

At the initial point of disc opening, the offset disc produces a cam-like action, pulling the disc from the seat. This cam-like action reduces seat wear and eliminates seat deformation when the disc is in the open position. When open, the disc does not contact the seat, therefore seat service life is extended and operating torques are reduced. As the valve closes, the cam-like action converts the rotary motion of the disc to a linear type motion to effectively push the disc onto the seat.
The wiping action of the disc against the seat prevents undesirable material build-up from slurries or suspended solids.
STANDARD PRODUCTION RANGE

FLANGE	ANSI Class 150	ANSI Class 300	ANSI Class 600
RATING-PSI	285	740	1440
RATING-BAR	20	50	100
SIZE-INCH	2-60	2-48	2-24
SIZE-MM	50-1500	50-1200	50-600
TESTING	API 598
FACE TO FACE SPECIFICATIONS	ANSI B16.1/API 609/MSS-SP-68/ISO 5752
END FLANGE SPECIFICATIONS	ASME B16.5:Class 150,300,600 JIS B2210:10K,16K,20K DIN ISO PN10,PN16,PN25,PN40
CONNECTION	WAFER, LUG, DOUBLE FLANGED
ACTUATOR-MANUAL	LEVER HANDLR, WORM GEAR OPERATOR
ACUTATOR AUTOMATIC	ELECTRIC MOTOR, PNEUMATIC DOUBLE ACTING, PNEUMATIC SPRING RETURN

Main Materials

FLANGE	ANSI Class 150	ANSI Class 300	ANSI Class 600
BODY	Carbon Steel (A216 WCB) 316 SS (A351 CF8M)
DISC	316 SS (A351 CF8M)
STEM	17/4PH (A564-630)
SEAT	PTFE, RTFE, 316 SS, Inconel, PTFE+316SS, RTFE+316SS
SHAFT BEARING	316 SS+RTFE Impregnated, 316 SS+Graphite Impregnated
PACKING SEAL	PTFE, Graphite

Seat Materials and Rating

PTFE	Class VI, bubble tight
RTFE	Class VI, bubble tight
316 SS	Class V
INCONEL	Class V
PTFE+316SS	Class VI, bubble tight                                                       Class V w/Preferred Flow After Fire
RTFE+316SS	Class VI, bubble tight                                                     Class V w/Preferred Flow After Fire