Double Flanged End Butterfly Valve

Double Flanged End Butterfly Valve Manufacturer - Exporter, Supplier, Stockist, Importer

Double Flanged End Butterfly Valve - Flow Control Lever,  Worm Gear, Pneumatic , Motorized, Electrical Actuator Operated
Zero Leakage Super Seal Butterfly Valve Flanged End

A one product has different names:

Double Flanged End Butterfly Valve
Double Flanged End, Center Disc Design Butterfly Valve with Flow Control Lever Operated
Double Flanged End, Replaceable Seat Type Butterfly Valve with Worm Gear Actuator Operated
Double Flanged End, Concentric Disc, Butterfly Valve with Pneumatic Actuator Operated
Double Flanged End, Resilient Seated Butterfly Valve with Electrical Actuator Operated
Double Flanged End Butterfly Valve with Motorized Actuator Operated
Tight Shut Off, Zero Leakage Butterfly Valve with Double Flanged End
Slim Seal Design, Integral Flange Type Butterfly Valve
Center Disc, Slim Seal Design Butterfly Valve with Flanged End
Concentric Disc Butterfly Valve with Flanged End
Zero Leakage Type, Rubber Lined Seat, Butterfly Valve with Flanged End
Resilient Seated Butterfly Valve with Flanged End

Double Flanged End Butterfly Valve Single Piece Cast Body: Design confirms to as per BS 5155 / API 609 / AWWA C 504 / ASME B 16.10

Butterfly Valve Flange Drilling:  As Per ANSI B 16.5, Class 125/Class 150/Class 300/BS 10 Table D/ Table E/ Table F/ Table

Double Flanged End Butterfly ValvePressure Rating: Class 125, Class 150, Class 300, PN6, PN10, PN16, PN25

Manufacturing Size Range of Flanged End Type Butterfly Valve:  DN50/50mm/2”/Two Inch, DN65/65mm/2-1/2”/Two and Half Inch, DN80/80mm/3”/Three Inch, DN100/100mm/4”/Four Inch, DN125/125mm/5”/Five Inch, DN150/150mm/6”/Six Inch, DN200/200mm/8”/Eight Inch, DN250/250mm/10”/Ten Inch, DN300/300mm/12”/Twelve Inch, DN350/350mm/14”/Fourteen Inch, DN400/400mm/16”/Sixteen Inch, DN 450/450mm18”/Eighteen Inch, DN500/500mm/20”/Twenty Inch, DN550/550mm/22”/Twenty Two Inch, DN600/600mm/24”/Twenty Four Inch Size and more big size of Butterfly Valve can manufacutrer on order basis.

Slim Seal Design, Center Disc, Double Flanged End Butterfly Valve Flow Control Lever Operated - Model Series: FBFSP1/6
Slim Seal Design, Center Disc, Double Flanged End Butterfly Valve Gear Operated - Model Series: FBFSP1G/6G
Slim Seal Design, Center Disc, Double Flanged End Butterfly Valve Pneumatic Actuator Operated - Model Series: FBFSP1P/6P

Double Flanged End Butterfly Valve

Why product name is “DOUBLE FLANGED END BUTTERFLY VALVE”, because a butterfly valve casted body have integral flanges (not fabricated/welded on body as photograph) as like standard flange type gate, globe, check or ball valve. Advantage of flange type butterfly valve is easy to mount without using long bolt – stud as wafer type (flangeless) butterfly valve, also can use and easy to mount at dead end of pipe line.  

Fabricated body double flange type butterfly valve manufacture by in size above 600NB/600mm/24” with Double Off-Set Disc Design (Eccentric Disc) Butterfly Valve.

Flange type, concentric disc, rubber seated, slim seal design butterfly valve gives best performance in low pressure and medium temperature application. These types of valves gives class one performance in application of Water, ETP – Effluent Treatment Plant, Sea Water, Salt Water, DM Plant, Fire Fighting Line, Raw Water Line, Filter Press, Air Silo, Process Chemical Service, Corrosive Chemical, Fire Water Pump Line, and Cooling Water Media.

All types of Tight Shut off, Centric Disc,  Rubber Seated Butterfly Valves are cheapest, light weight, easy available, no flange gaskets, easy to install, high performance, ready stock product, major all operation available and easy to manufacture.

One more question sometimes arise why we have to use double flanged end type butterfly valve in place of Rising Stem Gate Valve, Bolted Bonnet Globe Valve , Full Bore Ball Valve or Plug Valves. The answer is main low cost, second light in weight, third low torque which saves cost of actuators and fourth tight shutoff - zero leakage in soft rubber seated valve. If pressure and temperature limit cover in range of butterfly valves then it is best selection forever.

Why Butterfly Valves are low cost, have cheap rate compare other types of metal valves? The reason is butterfly valve body materials not come in direct contact with flow media, so no need to use any high quality steel materials, cast iron or ductile iron also good for any service. Only the disc material we have required to use high grade of steel to best suitable process media application. Mostly in all valve main body parts always heavy and that cost also much high, here due to saving of body material cost total butterfly valve cost goes down. Selection of elastomer rubber seat is base on process media application and its temperature.

Nitrile, Neoprene, EPDM, NBR, Buna-N, Hypalon, Ebonite, Silicon, Viton are seat options as a rubber elastomer for Double Flanged End Butterfly Valves.

Sometimes we think how to assemble a butterfly valve, it may be very difficult but it is wrong thinking. Design construction and assembly of Butterfly Valve is very simple. By the help only major four parts total assembly complete of butterfly valve. Main parts of Double Flanged End Butterfly Valve are Body, Seat, Disc and Spindle/Stem. First duly machined body renewable seat or bonded seat fixed on body, second insert a disc on centre of valve body, third enter a spindle from top side centre of body (if spindle is in two part then one from top and another from bottom) now last fourth bolting or pinning joint of disc and spindle to rotate disc along with stem. At present bare stem double flanged end butterfly valve is ready; we can mount flow control hand lever, gear or any actuator to suit our process application.

Nivz Valve & Automation also manufacture and exporter of slim seal body double flange type butterfly valves in various body material like CF8/CF3/CF8M/CF3M/CN7M/SS304L, SS 316L, SS317L, NAB2, Alloy20, Nickel Aluminium Bronze, Hastelloy C22/276, Monel, Duplex Steel & Super Duplex Steel for Sea Water, Salt Water, Sulphuric Acid & Corrosive Chemical application.

We have broad experience of valve in a corrosive application. Nivz supplying butterfly valves with Stainless Steel Hand Lever, Stainless Steel Gear Actuator and Stainless Pneumatic Actuator body for very corrosive application on customer order basis.

Nivz Valves - Double Flanged End Butterfly Valve Manufacturer - Exporter, Supplier, Stockist, Importer.

Butterfly Valve Various Operation Options:

A Nivz standard double flange end butterfly valve supply with eight bare stem or flow control lever operated. Size range up to DN 200 (8”) supply with flow control lever, above with quarter turn worm gear actuator operation.


Some more options in valve automations as list below:

Our technical team have more than 18 years of experience industrial process valve automation & system. We are one of the leading Butterfly Valve Manufacturers, Exporters, Supplier and Stockiest.

A complete necessary accessories also available for automatic flange type butterfly valves like Manual Override Gear Box, Solenoid Valve (5 x 2 Way / 4 Way x 5 Port OR 3 X 2 Way), Air Filter Regulator, Silencer,  Elector Pneumatic Valve Petitioners, Air Receive Tank, Air Compressor, Relay, Pneumatic Tubing & Connector Fittings etc.

Butterfly Valve Tightness Check

Salient Features of Double Flange Center Disc Butterfly Valve

Application of Double Flange End Butterfly Valve

Design & Testing International Standard of Flanged Butterfly Valve

Design Standard : BS 5155 / API 609
Inspection & Testing Standard : BS EN 12266 - I (BS 6755-I) / API 598 / ISO 5208
Flange To Flange Distance : As Per ANSI B 16.10 / BS 5155 / API 609
End Connection : Double Flanged End  (Flange Integral Cast)
  : ANSI B 16.5, Class 150
  : BS 10 Table D / E / F / H
  : PN 6 / PN 10 / PN 16 / PN 25
  : DIN Standard / JIS Standard / IS Standard
Manufacuring Size Range : 2" (DN50) to 24"(DN 600)
Pressure Rating of Valve : 125 Class / 150 Class
  : PN 10 / PN 16 / PN 25
Valve Operation : Manual Flow Control Lever / Worm-Gear Actuator Operated
  : Pneumatic Quarter Turn Rotary Actuator (Single Acting Spring Return / Double Acting)
  : Motorized Electrical Actuator Operated (Single or Three Phase Power Supply)
Valve Seat Leakge : Leakage Class VI (Zero Leakage)

MOC (Bill of Material - BOM) for Double Flange End Butterfly Valve

Body & Disc Material : ASTM A 126 GR. B / IS 210 GR. FG 200/220/260 (Cast Iron) / Ductile Iron / Nodular C.I.
  : ASTM A 216 GR. WCB (Cast Carbon Steel)
  : ASTM A 351 GR. CF 8 / CF 8M (SS 304 / SS 316)
  : ASTM A 351 GR. CF 3 / CF 3M (SS 304L / SS 316L)
  : ASTM A 351 GR. CN7M (Alloy 20)/ ASTM A351 Gr. CF8C
  : ASTM A351 Gr. CD4Mcu / ASTM A351 Gr. CK3MCuN
  : ASTM A352 Gr. LCA / LCB / LCC (Low Temperature Carbon Steel)
  : Aluminium Bronze / Hastelloy C - 22/276 / Super Duplex Steel
  : NACE MR0175 / NACE MR
Spindle/Stem Material : ASTM A 276 T - 304 / 316 (SS 304 / SS 316)
  : ASTM A 276 T - 304L / 316L (SS 304L / SS 316L)
  : ASTM A 276 T - 410 (S.S. 410 - 13% Cr. Steel)
  : Alloy 20 / Hastelloy / Monel
  : Duplex Steel / Super Duplex Steel
Seat (Bonded / Moulded Type) : NBR, Buna-N,
  : Nitrile, EPDM, Neoprene, Hypalon, Ebonite
  : Silicon, Viton,

Dimensions / Catalogue of Double Flange End Butterfly Valve

Dimensions, Catalogue of Double Flanged End Butterfly Valve

download double flange type drawing catalogue with dimensions