Danfoss VFG 21 Pressure-Relief Globe Valve Body DN20 PN 16 Kvs 6.3 m³/h (2-Way flanged)
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Product Description
Danfoss VFG 21 2-way flanged globe (seat) valve body, OEM order code 065B2503. Nominal size DN20, pressure class PN 16, flow coefficient Kvs 6.3 m³/h. The VFG 21 is a two-way pressure-relieved valve body (function "Pressure relief"), the body element of Danfoss pressure / differential-pressure / flow controllers. It pairs with a matched self-acting (AFA / AFP / AFT / AVT) or electric (AMV / AME) actuator to form a temperature, pressure, differential-pressure or flow controller. Grey cast iron EN-GJL-250 (GG-25) body with stainless-steel, mat. no. 1.4404 cone and stainless-steel, mat. no. 1.4021 seat, EPDM sealing, linear optimized flow characteristic, 6 mm stroke, spindle normally open. Rated for district heating media at 2 °C to 150 °C, maximum differential pressure 16 bar. Data quoted verbatim from store.danfoss.com (code 065B2503).
Technical Specifications
- Brand
- Danfoss
- Part number
- 065B2503
- Type
- VFG 21
- Product group
- Pressure flow controllers
- Application
- District Heating
- Valve size
- DN 20
- Pressure class
- PN 16
- Nominal pressure
- 16 bar
- Kvs value
- 6.3 m³/h
- Connection type
- Flange
- Number of ports
- 2
- Function
- Pressure relief
- Flow characteristic
- Linear optimized
- Spindle position
- Normally open
- Stroke
- 6 mm
- Differential pressure (max)
- 16 bar
- Cavitation factor
- 0.6
- Media temperature
- 2 °C to 150 °C
- Permissible media
- District heating/cooling circulation water
- Medium alternative
- Glycolic water up to 30%
- Media pH range
- 7 to 10
- Leakage through port (max)
- 0.01 % Kvs
- Valve body material
- Grey cast iron EN-GJL-250 (GG-25)
- Valve cone material
- Stainless steel, mat. No. 1.4404
- Valve seat material
- Stainless steel, mat. No. 1.4021
- Sealing material
- EPDM
- Net weight
- 6.63 Kilogram
- Gross weight
- 6.85 Kilogram
- EAN
- 5702421804209
- HS code
- 8481.80 (taps, cocks, valves for pipes)
Standards & Compliance
- Size / Series
- DN 20
- Material
- Grey cast iron EN-GJL-250 (GG-25); cone Stainless steel, mat. No. 1.4404; seat Stainless steel, mat. No. 1.4021; seal EPDM
- Pressure Rating
- PN 16 (16 bar); max differential pressure 16 bar
- Temperature Range
- 2 °C to 150 °C
- HS Code
- 8481.80
Compatibility & Fitment
Valve body for Danfoss pressure / flow control-valve assemblies. Combine the VFG 21 DN20 body with a matched self-acting (AFA / AFP / AFT / AVT) or electric (AMV / AME) actuator sized for the required duty. Select the body by nominal size (DN20), pressure class (PN 16) and flow coefficient (Kvs 6.3 m³/h); verify actuator stroke 6 mm and media compatibility before ordering.
Product Documentation
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Technical guides
- Cross-Referencing Danfoss Refrigeration Components by IMPA and OEM Code
- Danfoss Product Code Decoder — 003Z, 013G, 017B, 023U, 027L, 032F, 060G, 060H, 065B, 065Z, 068Z, 084H, 132F, 148B Series (Complete Reference)
- Danfoss Maneurop MTZ Reciprocating Compressors — Model Range, Voltage Codes and Replacement Guide
Catalogue entry last verified: 2026-08-24. A manufacturer datasheet is attached to this entry — confirm application-critical values against it.
Frequently asked questions
- Where can I buy 065B2503?
- 065B2503 can be ordered from cballast.com as a Danfoss catalogue item: request a quotation on this page or email sales@cballast.com, and the order ships worldwide.
- What is the manufacturer part number for this Danfoss product?
- The manufacturer part number is 065B2503.
- What is the HS code for 065B2503?
- The customs tariff (HS) code for 065B2503 is 8481.80.
- Who manufactures 065B2503?
- 065B2503 is a Danfoss product in the Valves range.
- Is a datasheet available for 065B2503?
- Yes — the 065B2503 datasheet can be viewed and downloaded on this page.
- What is the minimum order quantity for 065B2503?
- The minimum order quantity is 1.
- Is 065B2503 available?
- Yes — 065B2503 is available to order: fulfilment is from supplier stock in cBallast's European network, dispatched directly from the warehouse to the customer, with the exact lead time stated in the quotation (reply within 24 hours).