PURPOSE

Butterfly valve is a flow regulating disc valve, rotary valves in which a disc – shaped closure member is rotated through 90º, or about to open or close the flow passage. The main function of these valves is to control the flow of liquids through a section of pipe. Butterfly valves are mainly used in waste treatment systems.

OPERATING PRINCIPLES:

Butterfly Valve movement of the disc will depend on whether the valve is open or closed either partially or completely. If the valve is opened partially, it means that the disc will not be rotated a full one quarter turn, thus it cannot provide unrestricted passage. This means that, smaller amounts of fluid or air will pass through. However, if the valve is opened completely, the disc will be rotated 90 degrees then larger amounts of air or fluid will pass through.

JD. Controls Wafer Type Butterfly Valve have been developed with extensive application, design and manufacturing expertise. J. D. High Performance Slim-Seal, Concentric design Butterfly Valves are reliable, maintenance free shutoff with permanently gas-tight seal with an integrally moulded or replaceable elastomer body liner. J. D. Butterfly Body having two nos. flange locating holes for sizes up to 12 and from size 14 and above 04 nos. for easy alignment of valve during installation. Flange locating hole confirm to as per ANSI B 16.5 Class 125 & Class 150 / BS 10 Table D, E, F / PN 6, PN 10, PN 16 or other international standard. J. D. High performance butterfly valves are also available with Full-Lugs type body with raised faces and flanged ends connection.

JD. Butterfly Valve, Wafer Type, Slim-Seal design, maintenance free shutoff. This butterfly valves excess other conventional valves such as gate valve and globe valves in all aspects, especially in terms of light weight, less number of component, no flange gaskets required and economical operation and maintenance costs.

JD. Slim Seal design Butterfly Valves body seat mechanism have a very low torque, tight shut off with zero leakage, compact actuator selection, and long life smooth easy operation. The slim-seal, center disc design valves are widely available with different combination of body, seat & disc materials to satisfy the need of most industrial application.

Salient Features :

  • Concentric, Slim-Seal Design
  • Greater Sealing Capacity
  • Soft Seat Design
  • Lower Torque with any fluid
  • Permanently tight closure
  • Bi-Directional Valve
  • Optimum operation under Vacuum Condition
  • Suitable for On-off as well as Throttling Service
  • Materials for almost all media
  • Short Face To Face Dimension
  • Wafer Design Body
  • Long Service Life
  • Smooth, Easy Operation
  • Maintenance Free Version
  • Less Weight, Easy To Install

Special Options :

  • Off Set Disc Design Butterfly Valve for high pressure & temperature service.
  • Moulded / Replaceable Seat option
  • Gear / Pneumatic Rotary Actuator Operated
  • P.T.F.E. (PFA/FEP) Lined Butterfly Valve
  • Flanged End, Butterfly Valve
  • Damper Type Butterfly Valve for High Temperature Air Service
  • Off Set Disc Design Butterfly Valve for high pressure & temperature service

Material of Construction:

Cast Iron           : IS 210 Gr FG 200
Cast Carbon Steel           : ASTM A 216 Gr WCB
Cast Stainless Steel        : ASTM A 351 Gr CF 8/CF 8M
Forged Carbon Steel       : ASTM A 105
Forged Stainless Steel     : ASTM A 182 Gr F304 / F316
Seat & Seals      : PTFE, Reinforced PTFE
Design Type      : Single Piece/ Two Piece/Three Piece
End Connection  : Wafer Type To suit to ANSI B 16.5 (150#)
Double Flanged  : AS PER ANSI B 16.5 (150#)
Pressure Rating  : ASA 125#, 150#
Engineering Option         : Gear Operated, Electrical Actuated & Pneumatic Actuated
Size Range        : 50 mm to 300 mm

Design & Testing International Standard:

Valve Design      : BS 5155 / API 609
Pressure Testing      : BS 6755-I / API 598
Face To Face      : ANSI B 16.10
Flange Drilling    : ANSI B 16.5 / BS 10 Table / DIN / IS 6392
Pressure Rating       : PN 10 / PN 16
Size Range          : 40NB to 600NB
Operation           : Up to 250NB Flow-Control Lever Operated and above Gear
Operated. On special request Gear Operation also available from
80NB size.

Standard Test:

Body Test: 1.5 times the working pressure with water. This test is performed after valve assembly and with disc in half position open, it is called as a body hydro test.

Seat Test: 1.5 times the working pressure with water.

Function / Operation Test: At the time of final inspection, each valve and its actuator (Flow-Control Lever / Gear / Pneumatic Actuator), under goes a complete operating test (Open/Close). This test carried out without pressure and at ambient temperature. It ensures the correct operation of the valve / actuator assembly with accessories such as solenoid valve, limit switches, air filter regulator etc.

 

Special Test: On request, any other test can be carried out according to special instruction by client.

Application:

  • Water Treatment Plant
  • Paper Industry
  • Sugar Industry
  • Breweries
  • Chemical Industry
  • Waste Effluent Treatment Plant
  • Drilling Rigs
  • Gas Plant
  • Cooling Water Circulation
  • Heating & Air Conditioning
  • Pneumatic Conveyors
  • Compressed Air.
  • Fire Exposure.
  • Pharmaceuticals.