Flow regulation made to measure – static or dynamic!

Dynamic: ASTRA<sup>®</sup> DC

Dynamic: ASTRA® DC

Dynamic combination valve comprised of a volume flow regulator which can also be set externally, a differential pressure regulator and a modulating control valve – for maximum energy efficiency under changing conditions (with electric actuator – for variable valve positioning).

Maximum convenience with minimal energy consumption because the volume flow is optimally regulated (optimised flow and pump pressure):

  • Perfect control of the system because regulation is fully modulating with full valve authority and maximum ΔT – regardless of any fluctuations in the differential pressure
  • Maximum ΔT through dynamic, rapid response and increased system stability
  • Optimal handling because the time to specify all components for hydraulic balancing is reduced to a minimum (only volume flow data required)
  • Perfect plant management through high control performance in all parts of the system
  • High flexibility because the installed system can be converted at any time
  • Cost savings because no other control valves are required in the system (fewer control valves in total owing to combined 3-in-1 design)
  • Rapid start-up because the system is automatically regulated
  • Perfect control of the system (e.g. differential pressure can be measured)
  • Increased convenience with energy savings for final consumers through high-precision temperature control
  • Longer service life because of economized movements
  • High valve authority through constant differential pressure across the modulating self-regulating unit
  • High flexibility because the volume flow can also be set externally
  • High precision through 20 – 40 mm valve stroke
  • Precise presetting with continuous scale
  • Standard measuring instrument connections for differential pressure

A program DVD can be ordered by phone +49 5207 / 994-0,
fax +49 5207 / 994-297 or E-Mail.


Dynamic: ASTRA<sup>®</sup> D

Dynamic: ASTRA® D

Dynamic volume flow limiter – for automatic hydraulic balancing in heating, cold water, cooling and air conditioning systems.

  • Maximum energy saving because the volume flow is limited independently of the differential pressure across the valve – through integrated, automatic unit with replaceable volume flow orifice plate and internal diaphragm (avoids oversupply)
  • Optimal hydraulic balancing because the volume flow is continuously limited
  • Cost and energy savings through wafer flange (particularly important when existing systems are refurbished)
  • Lower operating costs and accurate settings through defined limitation of the volume flow (no manual readjustment and no complicated start-up because the units are adjusted at the factory)
  • Precise control of individual consumers by the volume flow limiter
  • Standard measuring instrument connections for differential pressure

A program DVD can be ordered by phone +49 5207 / 994-0,
fax +49 5207 / 994-297 or E-Mail.


Static: ASTRA<sup>®</sup> Plus

Static: ASTRA® Plus

High performance for you through the latest ARI technology:

  • Ideal regulating properties through equal percentage characteristic up to a stroke of approx. 45% (linear characteristic curve in the regulating range above 45% stroke)
  • Exact adjustment accuracy through documented flow characte-ristic (in accordance with IEC 534 / VDMA 24423; measurement by „Delft Hydraulics“)
  • Tight shut-off through regulating plug with metal seal
  • Two-fold safety through metal bellows with safety packing (DN 15 – 200 mm)
  • V-port plugs withstanding high dynamic forces within the entire stroke (ASTRA® Plus DN 250 – 400)

Cost-effectiveness through simple handling:

  • Fine adjustment through user-friendly digital display design: accurate to 1/10 handwheel rotation; zero point adjustment can be fixed reliably; easy to read from above (position indicator at DN 250 – 400)
  • Cost savings through freedom from maintenance
  • Cost effectiveness through quality: exact compliance with your quality standards from the time you place your order through quality assurance in accordance with DIN ISO 9001
  • Easy operation even in cramped spaces through upright handweel
  • Variable measuring instrument connections (angle connections can be fitted)
  • Fast and easy to insulate through screw-down globe valve (in accordance with German energy saving regulations (EnEV))
  • Easily accessible measuring instrument connections above the flange

A program DVD can be ordered by phone +49 5207 / 994-0,
fax +49 5207 / 994-297 or E-Mail.


Static: ASTRA<sup>®</sup> 

Static: ASTRA®

High performance for you through the latest ari technology:

  • Ideal regulating properties through equal percentage characteristic up to a stroke of approx. 45% (linear characteristic curve in the regulating range above 45% stroke)
  • Exact adjustment accuracy through documented flow characteristic (in accordance with IEC 534 / VDMA 24423; measurement by „Delft Hydraulics“)
  • Tight shut-off through regulating plug with ptfe soft seal (also suitable for contaminated media)
  • Reliable seal through integrated, well-established and tested double seal system
    (EDD / ASTRA® DN 15 – 200)
  • V-port plugs withstanding high dynamic forces within the entire stroke (DN 250 - 400)

Cost-effectiveness through simple handling:

  • Fine adjustment through user-friendly digital display design: accurate to 1/10 handwheel rotation; zero point adjustment can be fixed reliably; easy to read from above (position indicator at DN 250 – 400)
  • Cost savings through maintenance free design
  • Cost effectiveness through quality: exact compliance with your quality standards from the time you place your order through quality assurance in accordance with DIN ISO 9001
  • Variable measuring instrument connections (angle connections can be fitted)
  • Easy operation even in cramped spaces through upright handweel
  • Fast and easy to insulate through screw-down globe valve (in accordance with German energy saving regulations (EnEV))
  • Easily accessible measuring instrument connections above the flange
  • Dew point barrier integrated in the insulating cap
  • User-friendly through standard „open / closed“ display

A program DVD can be ordered by phone +49 5207 / 994-0,
fax +49 5207 / 994-297 or E-Mail.