Butterfly Valve

Features

  • Double flange and double eccentricity design,
  • A lighter weigh due to ductile iron casting,
  • Maintenance free long life cycle,
  • Special hydraulic profile with low pressure loss,
  • Due to low torque value, ease of open-close applications,
  • 100% sealing on both sides,
  • Stainless steel sealing surface preventing gasket from sticking to the surface and protection against corrosion by cavitation,
  • Self-locking worm gearbox not requiring maintenance,
  • Adjusting torque value and number of cycle with additional gearboxes according to their class of valve and pressure,
  • Possibility to repair gasket without removing valve from the pipeline.

 

Applied Standards

Design EN 593
AWWA C504
Face to face dimensions EN 558-1 Series 14 (DIN 3202 F4)
EN 558-1 Series 13 (BS 5155 Short)
Flange Dimensions EN 1092-2
ISO 7005-2
BS 4504
DIN 2501
Coating DIN 30677
Test EN 12266-1 & -2
EN 1074-1 & -2

 

Pressure Classes and Diameters

PN10 - PN16 DN150 - DN3000 mm
PN25 DN150 - DN2200 mm
PN40 DN150 - DN2200 mm

 

Test Pressures (According to EN 12266)

  PN10 PN16 PN25 PN40
Seat (bar) 11 18 27,5 44
Body (bar) 17 25 37,5 60

 

Materials

Body DI casting, GJS-400.15 / GJS-500.7, EN 1563 (GGG40 – 50, DIN 1693),
Stainless steel casting, AISI 304-316 (optional)
Obturator DI casting, GJS-400.15 / GJS-500.7, EN 1563 (GGG40 - 50, DIN 1693),
Stainless steel casting, AISI 304-316 (optional)
Spindle Stainless steel, 1.4021 (X20Cr13)
AISI 304-316 (optional)
Bearings Bronze, GBzSnPb4
Teflon (optional)
Body Sealing Stainless steel fillet weld with precision machining, AISI 316L
Gasket Natural rubber, EPDM or NBR
Seal Clamp Ring DI casting, GJS-400.15 / GJS-500.7, EN 1563 (GGG40 – 50, DIN 1693),
Stainless steel casting, AISI 304-316 (optional)
Bolts & Nuts Galvanized steel, quality 8.8
Stainless steel, quality A2 (optional)
Internal-External Coating Blue electrostatic epoxy powder coating RAL 5010, other RAL colors optional,
Rubber lining against sea water and chemicals (optional).

 

Types of Actuators:

  • Handwheel,
  • Handwheel with extension spindle,
  • Electric Actuator,
  • Pneumatic Actuator,
  • Hydraulic Actuator,
  • Bracket and extension spindle are used then operated by hand or actuator.

 

Accessories

  • Handwheel,
  • Electric actuator,
  • Expansion shaft,
  • Street box,
  • Bracket,
  • Pneumatic actuator.

 

Technical Documents
Butterfly Valves
Dimensions and Sizing Chart of Butterfly Valves