OFFSET SPHERICAL BUTTERFLY VALVE

OFFSET DISC DESIGN
We, “JOGANI” are a leading manufacturer and Exporters of OFFSET BUTTERFLY VALVE. Offset Butterfly valves means that the stem does not pass through the center line of the disc, but instead behind it, opposite of flow direction. When the stem is located right behind the center line of the disc, the valve is called single-offset. This design was developed to reduce the disc contact with the seal before full closure of the valve with the aim of improving service life of the valve. Today, single-offset valves have given way to double offset and triple offset butterfly valves.
In a Double-Offset Butterfly Valve, the stem is located behind the disc with an additional offset to one side. This double eccentricity of the stem enables the rotating disc to rub over the seat for only about one to three degrees.
In a Triple Offset Butterfly Valve is often used in critical applications and is designed similar to a double offset butterfly valve. A triple offset butterfly valve is more efficient and allows for less wear. Triple offset valves are often made of metal seats to create a bubble-tight shut-off. The metal seats allow butterfly valves to be used in higher temperature ranges.
High performance butterfly valve designs use the pressure in the pipeline to increase the interference between the seat and the disc edge. These butterfly valves have higher pressure ratings and are prone to less wear.
"JOGANI" OFFSET BUTTERFLY VALVE design is developed with following and using international Standard for Having an International Competency with Global Manufacturers.
We "JOGANI" follow an international standards and designs to get 100% superior quality with workmanship & service to maintain trust of our Clients and repeat order.
TECHNICAL DETAIL
DESIGN TYPE
OFFSET DESIGN
DOUBLE OFFSET DESIGN
TRIPLE OFFSET DESIGN
MFG. STANDARD
BS 5155, API 609 & AWWA 504
TESTING STANDARD
API 598/ BS 6755 Part-I
FACE TO FACE STANDARD          
BS 5155, API 609 & AWWA 504 / ANSI B 16.10
PRESSURE & TEMPERATURE RATING
ASME B 16.34
PRESSURE CLASS
150#, 300#
PN10, PN 16
VALVE SIZE
 
1½” To 40”
(40 mm TO 1000 mm)
END CONNECTIONS
WAFER TYPE
FLANGE DRILLING
150#, 300#
PN10, PN 16
BS 10 TABLE D / E / F / H
VALVE SEAT LEAKAGE
CLASS VI (Zero Leakage)
MATERIAL OF CONSTRUCTIONS
CI TO IS 210 GR. FG 200
ASTM A 216 GR. WCB
ASTM A 351 GR. CF8 / CF8M / CF3 / CF3M
**Also Other Special Alloy available on request.
OPERATIONS
HAND WHEEL / GEAR
PNEUMATIC / ELECTRICAL ACTUATOR
**Also Other Special Operation available on request.