Needle Valve

Features

  • A lighter weigh due to ductile iron casting
  • Double flanged design that directs flow perfectly and maintains minimum loss at fully-open position
  • 100% sealing due to straight-sided sealing components
  • Linear change of pressure/flow rate at any position due to ring-shaped flow through inlet to outlet
  • Ease of axial piston movement due to brass guides and thus low torque values
  • Safe double-seated valve shaft due to maintenance-free bushes
  • Stable piston in desired position due to self-locked gearbox
  • Usage of low capacity actuator due to low torque values
  • Suitable for manual/hydraulic/electric actuator usage
  • Energy dispersion (piston housing) parts that can be implemented for cavitation-free operation

 

Applied Standards

Face to face Dimensions EN 558-1 Series 15
Flange Dimensions EN 1092-2
ISO 7005-2
BS 4504
Coating DIN 30677
Test EN 12266-1 & -2
EN 1074-1 & -3

 

Pressure Classes and Diameters

PN10 - PN40 DN100- DN1600 mm

 

Test Pressures (According to EN 12266)

  PN10 PN16 PN25 PN40
Seat (bar) 11 17,6 27,5 44
Body (bar) 15 24 37,5 60

 

Materials

Body DI casting, GJS-500.7, EN 1563 (GGG50, DIN 1693)
Shaft Stainless steel, 1.4021 (X20Cr13)
Piston Stainless steel, 1.4021 (X20Cr13)
SS+St37.2 (for diameters larger than DN400)
Piston Rod Stainless steel, 1.4021 (X20Cr13)
Hub DI casting, GJS-500.7, EN 1563 (GGG50, DIN 1693)
Guide Brass or Bronze
Clamp Flange Stainless steel, AISI304
Piston Housing (optional) Stainless steel, AISI304
Sealing Ring Stainless steel, AISI304
Gasket EPDM + Polyurethane
Bolts 8x8 galvanized
Stainless steel, A2 (when in contact with water)
Internal – External Coating Blue electrostatic epoxy powder coating RAL 5005, other RAL colors are optional