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                Sude is totally committed to providing highest quality valves and outstanding service to our customers. Complete customer satisfaction is our goal.

                Incorporating the latest in valve manufacturing technologies Sude assures a consistent, high quality valve that will provide years of trouble-free service.

                 A butterfly valve is from a family of valves called quarter turn valves. The "butterfly" is a 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 open, the disc is rotated a quarter turn so that it allows unrestricted passage.

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Features

Concentric Disc Design

  • Developed for water services up to 10 Kgf/cm (150 psi.)
  • Handles flow in either direction.
  • Body fully protected from corrosion by liner.
  • Low pressure drops (good CV characteristics).
  • Streamlined concentric disc minimizes turbulence and erosion.
  • Self-Cleaning seat area.
  • May be installed with shaft horizontal or vertical.
  • Greater thickness of liner at seating area offers longer service life.
  • Flange gaskets not required.

Eccentric Disc Design

  • Developed for oil cargo services up to 16 Kgf/cm (240 psi).
  • Accepts flow in one direction only.
  • Not usually fully lined.
  • Higher pressure drops especially in sizes under 150 mm.
  • Eccentric Disc generates more turbulence and erosion.
  • Seating areas not self-cleaning.
  • Should be installed with shaft horizontal.
  • Smaller higher stressed seating area prone to give shorter service life.
  • Flange gaskets required. No control over bolt pressure on gaskets.

Compared with Conventional Valve

  • Light and Compact: Butterfly Valves offer savings in weight, length and headroom. Design is more compact and costs are reduced.
  • Easy Maintenance: The simple design of Butterfly Valves facilities quick dismantling and parts replacement. maintenance cost savings are considerable.
  • Smooth & Quick Operation: 900 turn for Open/Shut operation. Leaver action simple one-man function. Gear operation is three to five times faster than standard gate valves.
  • Low Cost: substantially cheaper than convential Valves.

Valve Features and Benefits

  • One Piece Ductile Iron Body Casting Ensures High Strength with Minimum Weight. Compatible with ANSI 125/150
  • Top Actuator Mounting Pad to ISO-5211 Direct Mount Capabilities.
  • O-Ring Give Positive Sealing in Both Directions
  • PTFE Bushings for Shaft Support and Positive Alignment
  • One Piece Shaft Ensures Positive Disc Positioning
  • Precision Machined Disc Ensures Tight Shut-off with Minimum Torque and Longer Seat Life.
  • Phenolic Backed Cartridge Seat is Stretch Resistant, Non- Collapsible and Blowout Proof
  • Seat Face Negates Need for Gaskets



Applications

  • Water Treatment Plant
  • HVAC Application

Technical Specification

Series

:

1250 Series

Description

:

Motorised Operated Butterfly Valve

Material Specifications for PN10 Rating Butterfly Valve

Available Sizes

:

DN50 to DN300

Pressure Range

:

PN10

Body Material

:

Cast Iron to BS 145 Gr. 200

Body Liner

:

Nitrile Rubber or EPDM

Disc Material

:

Cast Iron to BS 1452 Gr.250

Shaft Material

:

BS970 – 080M40

Characteristic

:

ON-OFF / Linear Control up to 60° Opening

Pressure Temperature

:

Nitrile - 70°C / EPDM - 90°C

Material Specifications for PN16 Rating Butterfly Valve

Available Sizes

:

DN50 to DN600

Pressure Range

:

PN16

Body Material

:

Cast Iron to BS 1452 Gr. 220 / SG Iron to BS 2789 Gr 420/12 / SS to ASTM A 351 Gr CF8/CF8 m / CS to ASTM A 216 Gr WCB

Body Liner

:

Black Nitrile EPDM (General purpose)

Disc Material

:

SG Iron to 2789 Gr 420/12 nylon coating / AI. Bronze to BS 1400 Gr. AB2 or AB1 / SS to ASTM A 351 Gr. CF8/CF8 m edge polished

Shaft Material

:

AISI 410 PTFE coated for permanent dry lubrication

Bearings

:

PTFF Sheet bearings provided for valves with SS discs. Sizes 350 to 600 mm have Phosphor Bronze bearings as standard

Working Temperature Range

For Oils, Fuels, Water, Air, Gases, Powders, Pellets, Slurries etc.,

:

Hydrocarbons

(Except Aromatics) 10°C to 90°C

Other Liquids 10°C to 80°C

Dry Services 10°C to 60°C

Working Temperature Range

For Brines, Sea water, Estuary water, Marine Bilge & Ballast Systems

:

Liquids 10°C to 80°C

Working Temperature Range

For Steam, Water, Hot Gases, Powders, Slurries and aqueous slurries of an abrasive nature

:

Liquids 10°C to 120°C

Dry Services 10°C to 100°C

Assembled with

:
  1. Single Phase 230 V AC Actuator Alternatively 24 V AC & 110 V AC OR
  2. Three Phase 415 V AC Actuator
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