Danfoss NRV 28S E Check Valve 35 mm ODF Angleway
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Product Description
Danfoss NRV 28s E piston-type check valve (non-return valve), OEM P/N 020-3056. Controls unidirectional refrigerant flow to prevent back-flow in commercial refrigeration and air-conditioning systems. Angleway pattern, Solder, ODF, 35 mm (1 3/8 in), inlet and outlet. This "E" version is rated to a maximum working pressure of 49 bar (710 psig) with a media temperature range of -50 to 155 °C (-58 to 311 °F). NRV uses the standard spring (min. opening pressure differential 0.04 bar / 0.58 psi). Kv 16.5 m³/h (Cv 19.07 gal/min). Single flow with built-in damping piston. Refrigerant compatibility per the NRV/NRVH datasheet — verify against your system charge. Price on quote.
Technical Specifications
- Brand
- Danfoss
- Part number
- 020-3056
- Model
- NRV 28s E piston-type check valve (non-return valve)
- Category
- HVAC & Refrigeration — Check Valves
- Direction
- Angleway
- Connection
- Solder, ODF, 35 mm (1 3/8 in), inlet and outlet
- Max working pressure (PS/MWP)
- 49 bar (710 psig)
- Media temperature range
- -50 to 155 °C (-58 to 311 °F)
- Min. opening pressure differential
- 0.04 bar (0.58 psi)
- Kv
- 16.5 m³/h (Cv 19.07 gal/min)
- Flow
- single flow, with built-in damping piston
- EAN
- 5702428551656
- Materials
- Connection tube copper; solder ring brass; sealing disk brass; piston stainless steel; spring brass; valve body brass; guide brass; washer PTFE with glass fibre
- Approvals
- CE, EAC, PED (Art. 4 par. 3)
- Refrigerants
- R134a, R22/R407C, R290, R32, R404A/R507A, R407A, R407F, R407H, R410A, R448A, R449A, R449B, R450A, R452A, R452B, R454A, R454B, R454C, R455A, R513A, R515B, R516A, R600, R600a, R1233zd(E), R1234ze(E), R1234yf, R1270
- Net weight
- 1.303 Kilogram
- Type
- NRV 28s E
- Product group
- Check valves
- Approval
- CE
- Body material
- Brass
- CE mark
- Yes
- China RoHS compliance
- Yes with exemptions
- Connection Code
- (3001:X:35); (3002:X:35)
- Connection material
- Copper
- Connection notes
- Oversize
- Cv value [gal/min]
- 19.07 gal/min
- Design
- Piston
- EU RoHS compliance
- Yes with exemptions
- EU RoHS exemption clause
- 6(c)
- Flow direction
- Single-flow
- Flow direction indicator
- Embossed 1-way arrow
- Fluid Group
- 1
- Ignition source assessment
- Yes
- Inlet connection type
- Solder, ODF
- Inlet size [in]
- 1 3/8 in
- Inlet size [mm]
- 35 mm
- Kv value [m³/h]
- 16.5 m³/h
- Lubricants compatibility
- Oilfree applications
- Max. Working Pressure [bar]
- 49 bar
- Max. Working Pressure [psig]
- 710 psig
- Min. Pressure drop [bar]
- 0.04 bar
- Min. Pressure drop [psi]
- 0.6 psi
- Oil free refrigerants
- R516A
- Outlet connection type
- Solder, ODF
- Outlet size [in]
- 1 3/8 in
- Outlet size [mm]
- 35 mm
- PED category
- II
- Rated cap cond, Hot gas [IMP]
- tcond=86 °F
- Rated cap cond, Hot gas [SI]
- tcond=30 °C
- Rated cap cond, Liq. cap [IMP]
- tcond=86 °F
- Rated cap cond, Liq. cap [SI]
- tcond=30 °C
- REACH Candidate List substances
- Lead (CAS no. 7439-92-1)
- Temperature range [°C] [max]
- 155 °C
- Temperature range [°C] [min]
- -50 °C
- Temperature range [°F] [max]
- 311 °F
- Temperature range [°F] [min]
- -58 °F
- UL approval file name
- REFRIGERANT VALVE 53R0
- UL approved refrigerants
- R1233zd(E)
Standards & Compliance
- Material
- Connection tube copper; solder ring brass; sealing disk brass; piston stainless steel; spring brass; valve body brass; guide brass; washer PTFE with glass fibre
- Pressure Rating
- 49 bar (710 psig) max working pressure
- Temperature Range
- -50 to 155 °C
- Classification / Approval
- CE, EAC, PED (Art. 4 par. 3)
- HS Code
- 8481.30
Compatibility & Fitment
Install in the direction of the flow arrow. The differential pressure across the valve must exceed the minimum opening pressure differential (0.04 bar), including at the lowest capacity of capacity-regulated compressors. Braze the ODF solder ends with care to protect the internal seals. Verify code, connection size and spring variant (NRV vs NRVH) before ordering.
Product Documentation
More from Danfoss
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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: 2026-08-20. A manufacturer datasheet is attached to this entry — confirm application-critical values against it.
Frequently asked questions
- Where can I buy 020-3056?
- 020-3056 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 020-3056.
- What is the HS code for 020-3056?
- The customs tariff (HS) code for 020-3056 is 8481.30.
- Who manufactures 020-3056?
- 020-3056 is a Danfoss product in the HVAC & Refrigeration range.
- Is a datasheet available for 020-3056?
- Yes — the 020-3056 datasheet can be viewed and downloaded on this page.
- What is the minimum order quantity for 020-3056?
- The minimum order quantity is 1.
- Is 020-3056 available?
- Yes — 020-3056 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).