ARI Valve Corporation
Straightway control valve with screwed seatring
DN 15 - 100
  • Reversible pneumatic actuator
  • Actuator with rolling diaphragm
  • Control pressure max. 6 bar
  • Spindle protected from dirt and corrosion by EPDM-bellow
  • Maintenance-free O-ring sealing
  • Assembly of additional devices acc. to DIN IEC 60534-6
Unit of Measure

Model No.

N/A 445

Dia. Nominal

N/A 32 mm

Nominal Pressure

N/A PN 40

Body Material

N/A 1.4408


N/A Flanged


N/A Straightway


N/A DP 33

Standard Seat Dia.

N/A 28 mm

Standard Kvs Value

N/A 16 m3/h

Standard Stroke

N/A 20 mm

Diameter A

N/A 300 mm

Height [H]

N/A 476 mm


N/A 23 kg

Manual Operating Device- Dia. D1

N/A 300 mm

Manual Operating Device- Height H1

N/A 284 mm

Manual Operating Device- Weight

N/A 8 kg

Standard Valve Length- L

N/A 180 mm

Flange Dimension- Ø D

N/A 140 mm

Flange Dimension- Ø K

N/A 100 mm

Flange Dimension- n x Ø d1

N/A 4 x 18 mm


N/A Standard: - parabolic plug, metal sealed Special design: - Parabolic plug, soft sealed (max. 200°C)

Spindle Sealing

N/A PTFE-V-ring unit -10°C up to +220°C Graphite-packing -10°C up to +450°C Stainless steel bellow seal with safety stuffing box -60°C up to +450°C PTFE-packing -10°C up to +250°C

Flow Characteristic

N/A Linear Equal percentage


N/A Spindle Sealing

Positioning Ratio

N/A 50:1

Sealing: Seat/Plug- Leakage Class

N/A Metal / Metal- Leakage class IV acc. to DIN IEC 60534-4 Metal / Soft substance- Leakage class VI acc. to DIN IEC 60534-4


  • Compact design
  • Precision guided spindle
  • Roll hardened spindle
  • Plug sealing to conical edge of seat
  • Replaceable seat and plug
  • Screwed seatring
  • Kvs-values reducible 6 times
  • Positioning ratio 50:1
  • Spring- loaded PTFE-V-ring packing unit
  • Double wall bellow seal
  • Mechanical position indicator
  • Free of asbestos


  • Cooling water
  • Cooling brine
  • Warm water
  • Hot water
  • Steam
  • Gas
  • Alkalis
  • Acids
  • De-ionised water
  • Pure steam
    -other applications on request
  • C∈ -marking for applications acc. to Pressure Equipment Directive (identification obligation from ≥ DN32)


  • Standard: -
    parabolic plug, metal sealed

  • Special design: -
    Parabolic plug, soft sealed (max. 200°C)