cBallast
Industrial Parts Catalog
Datasheet generated 2026-10-07
sales@cballast.com
cballast.com

Danfoss PCV-VFG 21 self-acting control valve assembly kit — PN 25, DN 150, Kvs 320 m³/h, Flange, dp 0.5–12 bar (003G1525)

Danfoss · HVAC & Refrigeration · Balancing Valves · Denmark · danfoss.com
Part Number
003G1525  ·  HS 8481.80
Danfoss PCV-VFG 21 self-acting control valve assembly kit — PN 25, DN 150, Kvs 320 m³/h, Flange, dp 0.5–12 bar (003G1525)

Danfoss PCV-VFG 21 pre-assembled self-acting control valve (OEM designation "Assem.kit PCV-VFG21 PN25 150/320 flange"). Shipped as a factory assembly kit combining a Danfoss AF-series rolling-diaphragm actuator with a VFG 21 grey cast-iron globe body, ready to install as one unit for differential-pressure / pressure control. No external power or control signal is required — pipe pressure acting on the 630 cm² diaphragm holds the set differential pressure across the load. Valve size DN 150; PN 25; Kvs 320 m³/h; Flange connection; differential-pressure setting 0.5–12 bar; control ratio 400:1; 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 003G1525. Technical data quoted verbatim from store.danfoss.com (code 003G1525). Used in commercial refrigeration, provision-room cooling and reefer plant rooms across HFC, HFO and CO2 (R744) refrigerants.

Technical Specifications

Code number003G1525
TypePCV-VFG 21
Product groupPilot - controlled valves
Gross weight209 Kilogram
Net weight209 Kilogram
Volume528 Liter
Actuator size [cm²]630 cm²
Cavitation factor0.3
Cavitation factor 100%0.22
Cavitation factor 25%0.47
Cavitation factor 50%0.38
Cavitation factor 75%0.3
China RoHS complianceOut of scope
Connection typesFlange
Contains batteriesNo
Control ratio400:1
DescriptionAssem.kit PCV-VFG21 PN25 150/320 flange
Diameter [mm]150 mm
Differential pressure range [bar] [Max]12 bar
Differential pressure range [bar] [Min]0.5 bar
EU RoHS complianceOut of scope
Flow characteristicLinear optimized
FunctionPCV Assembly kit
Kvs values [m³/h]320 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 150
EAN5702421813751
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-VFG 21
Thread standardFlange
MOQ1

Compatibility

The PCV-VFG 21 kit is a complete self-acting control valve (AF actuator + VFG 21 grey cast-iron globe body) and needs no separate body order. Valve DN 150, PN 25, Kvs 320 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 0.5–12 bar against the AF-range / PCV data sheet before ordering.

Attached Documents