Duplex Stainless Steel Butterfly valves has a short
circular body, a round disc, metal-to-metal or soft seats, top and
bottom shaft bearings, and a stuffing box. We are India's one the
most trusted and relaible name for Quality Duplex Stainless Steel
Butterfly Valves. We are the most prominent source of DSS butterfly
valves manufacturers, suppliers and exporters in India. A Butterfly
valve is a quarter-turn rotational motion valve, that is used to stop,
regulate, and start flow. Duplex Steel Butterfly valves are easy and
fast to open. In this design, 90° rotation of the handle provides
a complete closure or opening of the valve. We do manufacture and
supply large size Butterfly valves are usually equipped with a gearbox,
where gears is connected to the stem by the handwheel. This simplifies
the operation of the valve, but at the cost of gradual slow speed.
In Other Words, Duplex steel butterfly valve is a type of flow control
device, typically used to regulate a fluid flowing through a section
of pipe. These valve are similar in operation to a duples
steel ball valve. The mechanism of these valves is having a flat
circular plate, positioned in the center of the pipe. The plate has
a rod through it connected to an actuator on the outside of the duplex
steel valve. Rotating the actuator turns the plate of this valve either
parallel or perpendicular to the flow. Unlike a DSS ball valve, the
plate is always present within the flow, therefore a pressure drop
is always induced in the flow regardless of valve position in this
particular type of duplex steel valves
We are having many different kinds of duplex steel
butterfly valves in our manufacturing range, each valve is being adapted
for different pressures and different applications. We are manufacturing
Duplex steel Butterfly valve in various styles including eccentric
and high-performance valves. These are typical valves that uses a
flat plate to control the flow of fluide. Duplex steel Butterfly valves
are used typically on larger pipe lines, such as front and rear suctions
and tank to pump lines etc. A Duplex Stainless Steel Butterfly valve
is also a type of flow control device, used to make a fluid start
or stop flowing through a section of pipe. The valve is similar in
operation to a duplex stainless steel ball valve.
Duplex Stainless Steel Butterfly valves are especially well-suited
for the handling of large flows of liquids or gases atrelatively low
pressures and for the handling of slurries or liquids with large amounts
of suspended solids.Whether your application requires Pressure, Level,
Pump, or Flow Control, Neev brand Duplex Stainless Steel Butterfly
Valves is your best choice for Selection, Sales, and Service.
Types of Duplex steel Butterfly valves
The construction of Duplex steel Butterfly valve
body varies. A commonly used design Duplex steel in Butterfly valves
is the wafer type Butterfly valves that fits between two flanges.
Another type, the lug wafer design Butterfly valve, is held in place
between two flanges by bolts that join the two flanges and pass through
holes in the valve's outer casing of the valve. We do manufacture
Duplex steel Butterfly valves even with flanged, threaded and butt
welding ends, but they are not often demanded.
Duplex steel Wafer Double Offset Butterfly Valves
We are manufacturing and supplying Duplex steel Wafer Double Offset
Butterfly Valves according to ASTM Pressure Classes 150# Double Offset
Ends ooptions -Gear, Electric, Pneumatic Operator etc. in size range
from 2" NB to 80" NB for the pressure rating 150#.
We are manufacturing and supplying these valves according to ASTM
Pressure Classes 150# and 300# Double Offset Flanged Ends ooptions
-Gear, Electric, Pneumatic Operator etc. in size range from 2"
NB to 80" NB for the pressure rating 150# and up to 56"
NB for the pressure rating 300#.
Duplex steel Rubber Seated Butterfly Valves
We have manufacturing capacity up to DN 300 for this type of valves
and pressure rating 150. These DSS butterfly valves are Wafer Ends
and middle eccentric
We are also manufacturing Duplex stainless steel Flanged Rubber Seated
Butterfly Valves which is nothing but an advanced design to Duplex
steel Rubber Seated Butterfly Valves. We have manufacturing capaciity
up to 120" NB or DN 3000.
Duplex Steel API Flanged Butterlfy Valve
Duplex Steel API Lug Wafer Butterfly Valve
Duplex Steel Triple Offset Flange Butterfly Valve
Duplex Steel Triple Offset Wafer Butterfly Valve
Duplex Steel API Wafer Butterfly Valve
Duplex Steel Worm Gear Butt-Weld Butterfly Valve
Duplex Steel Worm Gear Eccentric Butterfly Valve
Typical applications of Duplex steel Butterfly valves
We are manufacturing Duplex Steel Butterfly valve
which can be used in many different fluid services and they perform
well in slurry applications. The following are some typical applications
of Duplex Steel Butterfly valves manufactured and supplied by Neev
1.High stress corrosion and corrosion applications.
2.High pitting and crevice corrosion applications.
3.Stress corrosion cracking in a chloride environmental applications
4 .Slurry and similar services applications
5 . Vacuum service applications
6 . High-pressure and high-temperature steam applications
Advantages of Duplex stainless steel Butterfly valves
Compact design requires considerably less space, compared to other
1.Duplex steel Butterfly valves are comparitively light in weight
2.Duplex steel Butterfly valves are quick to operate, requires less
time to open or close the flow.
3.We can manufacture Duplex steel Butterfly valves in very large sizes.
4.Duplex steel Butterfly valves enjoy Low-pressure drop and high-pressure
6. Duplex stainless steel Butterfly valves maintenance costs are usually
low because there are a minimum number of moving parts and there are
no pockets to trap fluids.
5.Duplex steel Butterfly Butterfly valves possess many advantages
over gate, globe, plug, and ball valves, especially for large valve
Disadvantages of Duplex steel Butterfly valves
Throttling service in Duplex steel butterfly valve is limited to low
Cavitation and choked flow are two potential concerns in Duplex steel
Disc movement of Duplex steel butterfly valve is unguided and affected
by flow turbulence.
Open and close the Duplex steel Butterfly valves frequently other
wise it will get jamed..
1. Please make sure that the pipeline and flange faces are cleaned
properly because any foreign material such as metal filings, welding
slag, pipe scale, welding rods, etc. can limit disc movement or damage
the disc or seat.
2.Gaskets are not required on resilient seated butterfly valves because
they extend to both faces of these DSS valves.
3.Align the pipe-work, and spread the flanges enough to allow the
duplex stainless steel butterly valve body to be easily inserted between
the flanges without contacting the run pipe flanges.
Check that the butterfly valve disc has been set to about 10% open
so it doesn't become jammed in the fully seated position.
4.Insert the valve between the flanges taking care not to damage the
seat faces. Always lift the valve by the locating holes or by using
a nylon sling on the neck or the body. Never lift the DSS Butterfly
valve by the actuator or operator mounted on these valve.
5.Place the butterfly valve between the flanges, centre it, insert
the bolts and hand-tighten them. Carefully open the disc, making sure
the disc does not contact the inside of the adjacent pipes.
6.Very slowly close the valve disc to ensure disc edge clearance from
the adjacent pipe flange.
7.Fully open the disc and tighten all flange bolts.
8.Repeat a full close to full open rotation of the disc to ensure
9. Duplex steel Butterfly valves
Shipment & Storage of Duplex steel Butterfly valves
1. All Duplex steel butterfly valves position discs at 10% open
so that they are unseated..
2. The faces of each duplex steel butterfly valve are being covered
to prevent damage to the seat face, disc edge, or valve interior.
3.We Store all Duplex steel Butterfly valves indoors, preferably with
ambient temperatures between 5°C and 30°C.
4.Ship and store valves so that no heavy loads are applied to the
We are manufacturing these duplex steel butterfly valves with strict
quality control and completely as per technical specifications for
all the industrial sectors for various applications.
Oil & Gas
Pipe Line Projects
Countries where Neev Valves can supply Duplex Steel Butterfly Valves
Neev Valves Welcomes Distributors for Duplex Steel Butterfly Valves