Double Offset Butterfly Valves
Industrial valves normally require wider temperature and pressure ranges, which conventional resilient seated butterfly valve can not comply, this has led to development of high-performance double offset butterfly valves, with double offset design, which has an advantage of light weight, compact design, cost effective and low operation torque.
Industrial valves normally require wider temperature and pressure ranges, which conventional resilient seated butterfly valve can not comply, this has led to development of high-performance double offset butterfly valves, with double offset design, which has an advantage of light weight, compact design, cost effective and low operation torque.
We supply bi-directional double offset butterfly valves with PTFE seats. The low friction and low operation torque both contribute to a longer life design. All the parts are replaceable and in-line maintenance is available.
Design Standard: API609, ASME B16.34
Size Range: 2"~120" (DN50~DN3000)
Pressure Rating: ASME CLASS 150-600
Body Material: Carbon Steel, Stainless Steel, Alloy Steel, etc.
End Connection: Wafer, Lug, RF
Operation: Lever, Gear, Pneumatic, Electric, Hydraulic, etc.
Brand: Neway
Petrochemical plant, Refinery, Offshore platform, Power plant, LNG, Steel Mills, Commercial, Pulp and Paper, Hydrocarbon Processing, Industrial, etc.
The double offset shaft and disc arrangement provides camming action to the disc which disengages from the seat at minimal rotation. This design minimizes wear points at the top and bottom of the seat typical with conventional butterfly valves.
1st offset: Shaft is positioned downstream of the centerline of the seat.
2nd offset: Shaft is off center of the vertical axis of the seat.
Compact & Light Design:
Double offset butterfly valve is designed as API 609, due to its compact & light design, it is an economical substitute for gate, globe and ball valves. Below is a comparison table based on a 6’’ valve.
Advanced Manufacturing
Advanced Quality Control
Q: Is this double offset butterfly valve Fire Safe Design?
A: Yes, Fire Safe valve seat with dual seal including primary PTFE seat insert and metal seat. In the event that the PTFE inset is destroyed, the secondary metal seat provides effective shut-off. The DOV fire safe certificate approved by Lloyd’s Register.
Q: Can this offset butterfly valve meet zero leakage?
A: Disc-Seat sealing is achieved by torque force evenly loaded on disc laminated seal edge, which has resilient function to assure Zero Leakage in both hydrostatic or air test per API 598.
