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Datasheet generated 2026-10-08
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Danfoss SAVD safety pressure-reduction controller, PN 25, DN 40, kVS 16 m³/h, setting 2 – 8 bar, external thread G 2 A, free mounting (003H6973)

Danfoss · HVAC & Refrigeration · Balancing Valves · Denmark · danfoss.com
Part Number
003H6973  ·  HS 8481.80
Danfoss SAVD safety pressure-reduction controller, PN 25, DN 40, kVS 16 m³/h, setting 2 – 8 bar, external thread G 2 A, free mounting (003H6973)

Danfoss SAVD (003H6973) — self-acting safety pressure-reduction controller, PN 25, DN 40, free mounting, for district heating and central-heating circuits. The SAVD is a self-acting safety pressure-reduction controller that requires no auxiliary energy: it reduces and limits the downstream pressure, closing on rising outlet pressure, using a control valve and a spring-loaded actuator diaphragm. As a safety controller (SAV pressure-reduction) it provides the self-acting overpressure protection required for district-heating substations, independent of any electric control. kVS 16 m³/h; adjustable pressure setting range 2 – 8 bar; maximum differential pressure 16 bar. Medium temperature 2–150 °C; leakage 0.05% of kVS (IEC 534); Valve body ductile iron EN-GJS-400-18-LT (GGG 40.3), valve seat stainless steel 1.4571, valve cone dezincing free brass CuZn36Pb2As, actuator diaphragm EPDM. Connection external thread G 2 A (ISO 228/1). OEM P/N 003H6973, EAN 5710104031224. Technical data quoted verbatim from store.danfoss.com (code 003H6973).

Technical Specifications

Code number003H6973
TypeSAVD
FunctionSafety press. reduction controller (SAV)
Product groupPressure and flow controllers
DescriptionSelf-acting safety pressure-reduction controller (district heating), adjustable setting, free mounting
Valve sizeDN 40
Pressure classPN 25
kVS value16 m³/h
Connectionexternal thread G 2 A (ISO 228/1)
Pressure setting range2 – 8 bar (adjustable)
Max. differential pressure16 bar
PN alternative (safety function VSP)PN 16
ApplicationDistrict Heating
MediumDistrict heating/cooling circulation water / glycolic water up to 30% (pH 7–10)
Medium temperature2 – 150 °C
Leakage (IEC 534)0.05% of kVS
Mounting versionFree
Stem positionNormally open
Valve bodyDuctile iron EN-GJS-400-18-LT (GGG 40.3)
Valve seatStainless steel, mat. No. 1.4571
Valve coneDezincing free brass CuZn36Pb2As
Actuator diaphragmEPDM
EU RoHS complianceYes with exemptions (6(c))
REACH Candidate List substanceLead (CAS no. 7439-92-1)
Net weight9.405 Kilogram
Gross weight9.864 Kilogram
Packed volume31.862 Liter
EAN5710104031224
HS code8481.80

Properties

MaterialValve body ductile iron EN-GJS-400-18-LT (GGG 40.3); valve seat stainless steel 1.4571; valve cone dezincing free brass CuZn36Pb2As; actuator diaphragm EPDM
Pressure ratingPN 25 (max. differential pressure 16 bar)
Temperature range2 – 150 °C (medium)
Thread standardISO 228/1
MOQ1

Compatibility

Danfoss SAVD for DN 40 district-heating circuits, PN 25, free mounting. Size by the design flow (kVS 16 m³/h) and set the reduced-pressure setpoint within 2 – 8 bar. Confirm the connection (external thread G 2 A (ISO 228/1)) and pressure class (PN 25) against the pipework. Where the local code requires certified overpressure protection (SÜV/SAV), the SAVD provides it self-actingly. Genuine Danfoss part — specify order code 003H6973.

Attached Documents