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  3. HVAC Valves
  4. Herz F-4006 Flanged PICV - Cast Iron, PN16, DN50-DN125, 3 Test Points (AHU / Chilled Water)
  5. HVAC Valves
Herz F-4006 Flanged PICV - Cast Iron, PN16, DN50-DN125, 3 Test Points (AHU / Chilled Water)

Herz F-4006 Flanged PICV - Cast Iron, PN16, DN50-DN125, 3 Test Points (AHU / Chilled Water)

PN16 flanged PICV for large AHU chilled/heating water flow control. Cast iron body, DN50–DN125, 3.75–100 m³/h. 3 test points to measure differential pressure and flow rate across the valve. Actuators are an accessory product and can be supplied to suit different control signals.
  • Valve Size/Flow Rate
Product Code:
N/A
Brand: Herz
Product Features:
  • HERZ F 4006 pressure independent balancing and control valve (PIBCV) in flanged design
  • Cast iron body (EN-GJL-250), PN16 flanges to EN 1092-2
  • Linear control valve with integrated differential pressure controller
  • Maximum flow set by limiting the valve stroke, so flow stays constant when system pressure changes and no rebalancing is needed
  • 3 test points: P1–P3 checks the minimum differential pressure, and P1–P2 calculates flow from the kv values
  • Minimum differential pressure 40 kPa, maximum differential pressure 4 bar
  • Max. operating pressure 16 bar. Operating temperature 2°C to 110°C (down to -20°C with frost protection); liquids only, not steam.
  • Suitable for water and glycol mixes of 25–50%
  • EPDM diaphragm and gaskets, brass and stainless steel cones, seat and stem
  • Recommended presetting range 20–80% of nominal flow
  • Actuators are ordered separately. DN50–DN100 mount with an adapter, and DN125 mounts directly.
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The HERZ F 4006 is a pressure independent balancing and control valve (PICV) in a cast iron flanged body, built for air handling units, large coils and plant room circuits. It combines a linear control valve with an integrated differential pressure controller, so the flow set on the valve stays constant whatever happens to the system pressure. That removes the need for separate balancing valves and re-balancing when the system changes.

Flow is set by limiting the valve stroke with an adjustable nut, and can be checked on site through three test points. P1–P3 confirms the valve has its minimum 40 kPa differential pressure, and P1–P2 gives the flow from the kv table on the data sheet. With an actuator fitted, the full stroke is available for control, so 0–10 V actuators keep their full control range at any flow setting.

The valve suits heating and chilled water, including glycol mixes of 25–50%, up to 16bar and 110°C. Sizes run from DN50 (3.75–15 m³/h) to DN125 (25–100 m³/h), with PN16 flanges to EN1092-2. HERZ actuators are available in 24V modulating and 230V 3-point versions to suit your BMS.

FlowQuip supplies HERZ products in New Zealand. For project pricing, actuator selection or valve sizing, contact our team.

Accessories Products

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