| Brand | Danfoss |
| Part number | 020-3021 |
| Model | NRV 28s E piston-type check valve (non-return valve) |
| Category | HVAC & Refrigeration — Check Valves |
| Direction | Angleway |
| Connection | Solder, ODF, 1 1/8 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 | 5702428666770 |
| 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, UL (C UL US Listed), 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 | 1.258 Kilogram |
| Type | NRV 28s E |
| Product group | Check valves |
| Approval | EAC |
| Body material | Brass |
| CE mark | Yes |
| China RoHS compliance | Yes with exemptions |
| Connection Code | (3002:X:29) |
| Connection material | Copper |
| 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 1/8 in |
| 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 1/8 in |
| PED category | Art. 4, par. 3 |
| 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) |
