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Datasheet generated 2026-10-07
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Danfoss PCV-VFQ 21 self-acting control valve assembly kit — PN 25, DN 200, Kvs 450 m³/h, Flange, dp 0.5–10 bar (003G1546)

Danfoss · HVAC & Refrigeration · Balancing Valves · Denmark · danfoss.com
Part Number
003G1546  ·  HS 8481.80
Danfoss PCV-VFQ 21 self-acting control valve assembly kit — PN 25, DN 200, Kvs 450 m³/h, Flange, dp 0.5–10 bar (003G1546)

Danfoss PCV-VFQ 21 pre-assembled self-acting control valve (OEM designation "Assem.kit PCV-VFQ21 PN25 200/450 flange"). Shipped as a factory assembly kit combining a Danfoss AF-series rolling-diaphragm actuator with a VFQ 21 grey cast-iron globe body, ready to install as one unit for flow (quantity) limitation. No external power or control signal is required — pipe pressure acting on the 630 cm² diaphragm limits the maximum volume flow to the set value. Valve size DN 200; PN 25; Kvs 450 m³/h; Flange connection; differential-pressure setting 0.5–10 bar; control ratio 550:1; media District heating/cooling circulation water (Glycolic water up to 30%), 2 °C to 150 °C. Body Cast steel EN-GP-240-GH (GS-C 25); stem Normally closed; leakage rate 0.05 % Kvs. OEM P/N 003G1546. EAN 5702421814048. Technical data quoted verbatim from store.danfoss.com (code 003G1546).

Technical Specifications

Code number003G1546
TypePCV-VFQ 21
Product groupPilot - controlled valves
Gross weight328.5 Kilogram
Net weight328.5 Kilogram
Volume494.4 Liter
Actuator size [cm²]630 cm²
Cavitation factor0.2
Cavitation factor 100%0.16
Cavitation factor 25%0.31
Cavitation factor 50%0.31
Cavitation factor 75%0.2
China RoHS complianceOut of scope
Connection typesFlange
Contains batteriesNo
Control ratio550:1
DescriptionAssem.kit PCV-VFQ21 PN25 200/450 flange
Diameter [mm]200 mm
Differential pressure range [bar] [Min]0.5 bar
Differential pressure setting [bar] [Max]10 bar
Differential pressure setting [bar] [Min]0.5 bar
EU RoHS complianceOut of scope
Flow characteristicLinear optimized
FunctionPCV Assembly kit
Kvs values [m³/h]450 m³/h
Leakage rate [% Kvs]0.05
Media pH [Max]10
Media pH [Min]7
Media temperature [°C] [Max]150 °C
Media temperature [°C] [Min]2 °C
Medium alternativeGlycolic water up to 30%
Mounting versionFree
Number of ports2
Permissible mediaDistrict heating/cooling circulation water
Pressure classPN 25
Pressure nominal [bar]25 bar
REACH Candidate List substancesLead (CAS no. 7439-92-1)
Sealing materialEPDM
Stem positionNormally closed
Valve body materialCast steel EN-GP-240-GH (GS-C 25)
Valve cone materialStainless steel, mat. No. 1.4021
Valve seat materialStainless steel, mat. No. 1.4313
Valve sizeDN 200
EAN5702421814048
HS code8481.80

Properties

MaterialValve body Cast steel EN-GP-240-GH (GS-C 25); sealing EPDM
Pressure ratingPN 25
Temperature range2 °C to 150 °C
Standard sizePCV-VFQ 21
Thread standardFlange
MOQ1

Compatibility

The PCV-VFQ 21 kit is a complete self-acting control valve (AF actuator + VFQ 21 grey cast-iron globe body) and needs no separate body order. Valve DN 200, PN 25, Kvs 450 m³/h, Flange. An impulse tube set (003G13xx/14xx) connects the actuator diaphragm to the pressure tapping. Confirm DN, PN, Kvs and the differential-pressure setting range 0.5–10 bar against the AF-range / PCV data sheet before ordering.

Attached Documents