Duplex Stainless Steel Butterfly Valves

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#.

Duplex steel Double Offset Flanged Butterfly Valves

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

Duplex stainless steel Flanged Rubber Seated Butterfly Valves

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 Valves:
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 valves
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 recovery charachtristics.
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 applications.

Disadvantages of Duplex steel Butterfly valves

Throttling service in Duplex steel butterfly valve is limited to low differential pressure
Cavitation and choked flow are two potential concerns in Duplex steel butterfly valves.
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..

Duplex steel Butterfly valves Installation Procedures

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 proper clearances.
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 bodies.

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 Industries		Nuclear Power Projects
Petroleum Refineries		Hydro Power Projects		Chemical Industries
	Pharmaceutical Industries		Offshore Industries
Process Industries		Pipe Line Projects		Marine Industries