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Manufacturer of Smit Valve
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Butterfly Valves

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Butterfly Valves Manufacturers In India

Butterfly Valves Manufacturers in India

We are largest valves manufacturers in India and metal disc mounted on a rod. When the valve is closed, the disc is turned so that it completely blocks off the passageway. When the valve is fully open, the disc is rotated a quarter turn so that it allows unrestricted passage. The valve may also be opened incrementally to regulate flow. There are different kinds of Butterfly Valves, each adapted for different pressures and different usage.When the butterfly valve is closed, the disc is turned so that it totally shut off the passageway. When the Butterfly Valves is fully open, the disc is rotated at a quarter turn so that it allows unrestricted passage. The butterfly valve may also be opened incrementally to regulate flow. There are different kinds of butterfly valves, that are adapted for different pressures and different usage. A Butterfly valve is a rotational motion valve with a quarter turn. It is used to stop, regulate, and start flow.

Butterfly Valves Features

  • Seat liner extending on to the contact faces ensures perfect sealing and eliminates the use of flanges gaskets.
  • Unique triple sealing system for sheft sealing and prevents extemal substances from entering the stem bore.
  • The thin profile, spherically machined hand polished disc provides a very high Cv and greater pressure recovery plus superior abrasion and erosion resistance in slurry or dry media applications.
  • A fully universal body design ensure fitments of the valve between companion flanges of all standards (viz : ANSI, BS, DIN, JIS, IS etc.)
  • Take less space than ball valves
  • Form a tight closing seal
  • A rubber seated butterfly valves requires high torque to remove the vane from the seat
  • Have lower pressure limits
  • Typically used as control valves
  • Less expensive

Butterfly Valves are easy and quick to open. A right angle rotation of the handle provides a complete closure or opening of the butterfly valve. Large Butterfly Valves are usually comprised of a gearbox, where the hand wheel by gears is joined to the stem. This gives ease to the operation of the Butterfly Valve, but at the expense of speed.Smit Valves have a short circular body, soft seats, shaft bearings, and a stuffing box. The construction of a Butterfly valve body varies in design. A mostly used design is the wafer type that fits between two flanges. The lug wafer design is another common design that joins the two flanges and passes through the holes. Butterfly valves are even available with threads that are flange and have butt welding ends, but they are not used often. Butterfly valves comprises of advantages like over gate, globe, plug, and ball valves. These advantages are especially for large valve applications. The best and obvious advantages are saving of weight, space and cost. The maintenance costs are generally down because there is less number of mobile parts and there are no pockets to store fluids.Valves are especially well for the handling of large flows of liquids or gases.

Valves are built on the principle of a pipe damper. The flow control component is a disk of approximately the same diameter of the adjoining pipe, which rotates on either vertically or horizontally. When the disk lies collateral to the piping run, the butterfly valve is fully opened. When the disk approaches the 90 degree angle, the valve is shut.

Technical Specification

Part Name Material Option
Valve Type Centric Disc Design Butterfly Valves with a single piece Rubber lined body
Body Type Short water (sandwiched between flanges)
Seat Type Integrally moulded with the Body / Replaceable
End Connecting Water Sandwiched
Pressure Rating PN 10 / PN 16
Operating Type Range 25o C to 200o C (depending on MOC)
Seal Leakage Tight shut off
Operating Hand lever for sizes from 40NB to 300NB worm Gear Boxes for sizes from 40NB to 1200NB Pneumatic / Electrical Actuator operation - optional
Size Range 40NB to 1200 NB

Conformity to codes and standards

General design & manufacturing API 609 category A / BS 5155 / IS : 13095 / MSS SP - 67
Valve face to face dimensions Short water or Water lugged as per ISO 5752 Tab 5 & API 609 Category "A"
Top flange drilling ISO 5211 part II
Valve inspection and Testing API 598
Flange standard conformity ANSI 150, DIN PN 6/10/16, JIS 5K/10K/16K, BS 10 Tab D & E, IS 6392 PN 0.6/1.0/1.6
Butterfly Valves Manufacturers

Materials

Part Name Material Option
Body CAST IRON / CAST STEEL / S.S.304 - 316
Disc CAST IRON / CAST STEEL / S.S.304 - 316
Spindle SS 410 / 304 / 316
Body Lining NITRILE / E.P.D.M. / NEOPRENE / SILICON / VITON
'O' Ring NITRILE / E.P.D.M.
Pin S.S. 304 / 316
Lever M.S. FABRICATED

Hydraulic Test Pressure

BODY 16KG / CM2
SEAT 10KG / CM2
MFG. STD. BS - 5155
INSP. STD. BS - 6755

Specification (Gear Operated)

SIZE 250 300 350 400 450 500 600
A 266 300 320 385 405 465 540
B 196 230 272 302 325 405 460
C 316 365 125 480 525 580 695
D 244 292 340 385 425 472 572
E 285 285 300 305 305 305 370
F 350 350 350 500 500 500 450
G 119 119 116 140 140 140 240
H 68 68 83 75 75 75 115
I 318 318 318 409 409 409 478
L 68 78 92 102 114 127 154

Specification (Lever Operated)

SIZE 40 50 65 80 100 125 150 200
A 112 103 110 118 148 164 176 230
B 52 70 76 85 102 115 130 156
C 83 98 110 126 156 176 206 270
D 38 46 59 71 90 120 145 194
E 53 65 65 65 65 65 65 285
F 185 185 185 225 225 225 328 350
L 33 43 46 46 52 56 56 60
Butterfly Valves

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