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Wafer Type Butterfly Valves

Normex Butterfly Valve  (Now  available  with ISI mark)
 

 

The control application in pumping systems attracted Normex to come out with control Valves i.e. Butterfly Valve. The Normex Butterfly Valve superseded the Gate Valve, Ball Valve and Globe Valve in most spheres of applications. Gas tight sealing with excellent control characteristics and uni directional flow has qualified Normex Valves by most of the industries. The centrally mounted disc, shafts and bearings has minimised head loss.Itís low weight and compact design has achieved acceptability in industries like Chemical and Petrochemicals, Watertreatment, Agriculture and many more.......
 

Wafer Type Butterfly Valves

n Excellent flow control in quarter turn operation 

n Low pressure drop

n Low weight, low maintenance, long service life

n 100% tight shut of

 
   

Quality Features

  • Excellent flow control in quarter turn operation.
  • Compact, space saving design.
  • Bi-directional1 00% tight shut off.
  • Low weight, low maintenance, long service life,
  • Easy automation / retrofit possible.
  • Stream lined valve disc for lower pressure drop.
  • Both shafts mounted in bearing supports for
    easy operating torques.
  • Suitable for mounting between all standard
    flanges.
  • Gasket packing not required to install between
    flanges.
  • Sizes: 40mm to 400mm

 

 

Applications

 

1. Water treatment plants

2. Water distribution systems

3. Power Stations

4. Chemical/Petrochemical Industries

5. Steel Mills

6. Sugar Factories / Breweries

7. Sewage Plants

8. Process Industries

9. Seawater and Brine Pumping

10. Food Processing Industries

11. Mining Industries

 

 

Quality Features

 

Wafer Type Butterfly Valves

Actuator mounted

Wafer Type Butterfly Valves

Gear box

 mounted

n Excellent flow control in quarter turn operation

n Compact space saving design

n Bidirectional 100% tight shut off.

n Low weight, low maintenance, long service life.

n Easy automation / retrofit possible.

n Stream lined valve disc for lower pressure drop.

n Both shafts mounted in bearing supports for easy operating torques.

n Replaceable / Bonded seat options.

n Suitable for mounting between all standard flanges

n Gasket packing not required to install between flanges.

 

 

 

 

Parts list & Materials

Wafer Type Butterfly Valves

Part

Description

Std. mode of 

construction

Options

1

Body

Cast Iron, GG - 25/

IS - 210 FG - 260/

BS - 1452 Gr. 260

SG Iron GGG 40

Cast Steel (WCB)
Stainless Steel CF8 / CF8M

2

Disc

SG Iron, GGG 40

IS - 1865 SG  400/12/

BS - 2789 Gr. 240/12

Cast Steel (WCB)
Stainless Steel CF8/CF8M
Aluminium Bronze IS 305 Gr2

3

Seat

EPDM

Black Nitrile, Neoprene, Viton, Silicon, Hypalon or as per customer's requirements.

4

Shafts

AISI 410

SS304/SS316

5

Bearings

Self lubricating
Phosphor Bronze

PTFE

6

'O' Rings

Nitrile

EPDM, Neoprene

7

Bush

Polyacetal (Delrin)

PTFE

8

Taper Pin

AISI 304/410

AISI 316

9

Plug

Carbon Steel

---

10

Hand Lever

MS

CI / SGI / SS

 

Dimension Chart

 

Size(DN)

A

L

D

T

E

Wt(Kg)

40

33

76

103

240

2.2

50

43

82

113

240

2.7

65

46

88

121

240

3.2

80

46

96

129

240

3.5

100

52

110

147

240

5.0

125

56

122

160

240

6.3

150

56

148

170

330

8.5

200

60

174

200

330

12.0

250

68

212

245

500

22.9

300

78

239

270

-

29.0

350

78

260

321

 

 

400

100

298

345

 

 

450

108

326

373

 

 

 

Wafer Type Butterfly Valves

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Technical Data

 

Pressure Rating
PN 10 & PN 16
Pressure Testing a) Body : 1.5 x PN
b) Seat :  1.1 x PN
Temperature (-) 40o C to 200o C
Face to Face Dimension ISO - 5752 / IS - 13095 / BS - 5155
To suit flanges drilled as per IS, ANSI, BS,
DIN Standards.
Operation Bi-directional
Painting Epoxy coated

 

 

Technical Comparison

 

NORMEX BUTTERFLY VALVE

&

CONVENTIONAL GATE VALVE

Normex Butterfly Valve

Conventional Gate Valve

Compact size, short in length saves space. Lower in weight.

Bulky design, longer in length & higher in weight.

Can be used as On-Off as well partial opening or partial closing is possible.

Can be used only as On-Off. Double flanged design. Flanges are required to be drilled for the specific standard.

Flangless - fits between two flanges of any standards like IS, BS or ASA.
No drilling selection is required. Any valve off-the-shelf can be used for any drilling standards.

Once drilled cannot be fit to other standard flanges. Hence off-the-shelf avalibility is poor.

Quarter turn operation - valve opening to closing position is just quarter turn.
Hence on-off operation very easy.

Multi turn operation - valve opening to closing requires at least 12 turns (depending on valve size) hence process is very tidious.

Any position of the valve viz, on, off or intermediate can be known visually.

Valve position is not known especially in non rising spindle design.

100% leakproof over the life.

Leakproofness not guaranteed.

As it fits between two pipe flanges, only one set of bolts is enough for installation.

Two set of bolts are required for installation - one set for each flange.

Lower priced - saves your cost.

Higher price.

*For more details contact Normex

 
 
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