VMA 2-Way Seated Valve

Brand: Danfoss

VMA is 2-way seated valve primarily for use in district heating systems. It can be combined with:
  • ABV thermohydraulic actuators
  • VMA DN 15 can additionally be combined with self-acting thermostatic actuators RAVI, RAVK and RAVV
All sizes have external thread for flat packing (DIN 7603)

Specifications

Brand

Applications

  • District Heating
  • Heating Systems

Approvals & Certifications

  • Conical Extension Thread - EN 10226-1

BSP Connection

  • G 3/4” A Male
  • 1/2” BSPT Male

Cone Material

  • Valve Cone: EPDM

Connection Style

  • Cylindrical External Thread According to ISO 228/1
  • Tailpieces: Weld-On & External Thread

Control Functions Characteristics

  • Approximately Linear

Differential Pressure

  • psi: 14.5 to 72.52 (kPa: 100 to 500, bar: 1 to 5) - RAVI/RAVV
  • psi: 58.02 to 101.5 (kPa: 400 to 700, bar: 4 to 7) - ABV
  • psi: 7.25 to 43.51 (kPa: 50 to 300, bar: 0.5 to 3) - RAVK

Enclosure, Body Material

  • Valve: Dezincing Free Brass

Flow Rate

  • 0.25 to 2.5 m³/hour (Kvs)

Materials of Construction

  • Valve Insert & Valve Stuffing Box: Dezincing Free Brass

Measuring Range

  • Medium PH: 7 to 10

Media

  • Circulation Water, Glycolic Water up to 30 %

Nominal Pressure

  • psi: 232.1 (bar: 16, kPa: 1,600)

Process Temperature

  • 2° to 130° C (35.6° to 266° F)

Ratio

  • Control Ratio:1:50

Seat / Seal Material

  • Seat: 303 Stainless Steel, 1.4305

Spindle Material

  • Dezincing Free Brass

Valve Size

  • 1/2” (15 mm)

  • District Heating Systems

Documentation

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