Danfoss NRVH 12S Check Valve 1/2 in ODF Solder Straightway 020B1037
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Product Description
Danfoss NRVH 12s piston-type check valve (non-return valve), OEM P/N 020B1037. Controls unidirectional refrigerant flow to prevent back-flow in commercial refrigeration and air-conditioning systems. NRVH is the stronger-spring variant of the NRV line, intended for systems with parallel-connected (power-pack) compressors where discharge-line pulsation is higher. Straightway pattern, Solder ODF connection 1/2 in (12 mm), inlet and outlet. Built-in damping piston. Max working pressure 49 bar (710 psig); media temperature -50 °C to 155 °C. Refrigerant compatibility is listed on the datasheet — verify against your system charge.
Technical Specifications
- Brand
- Danfoss
- Part number
- 020B1037
- Model
- NRVH 12s piston-type check valve (non-return valve), stronger-spring NRVH variant
- Category
- HVAC & Refrigeration — Check Valves
- Direction
- Straightway
- Connection
- Solder, ODF, 1/2 in (12 mm), inlet and outlet
- Max working pressure (PS/MWP)
- 49 bar (710 psig)
- Media temperature range
- -50 °C to 155 °C (-58 °F to 311 °F)
- Kv
- 2.42 m³/h (Cv 2.80 gal/min)
- Min. opening pressure differential
- 0.2 bar (2.9 psi)
- Flow
- single flow, with built-in damping piston
- Net weight
- 0.086 kg
- EAN
- 5702428571920
- Materials
- Valve body brass; connection tube copper; built-in damping piston; stronger spring (NRVH) — full material breakdown in the NRV/NRVH datasheet
- Approvals
- CE, UL (C UL US Listed), EAC, PED (Art. 4 par. 3)
- Refrigerants
- R134a, R22/R407C, R290, R32, R404A/R507, 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
- Type
- NRVH 12s
- Product group
- Check valves
- Approval
- C UL US LISTED
- Body material
- Brass
- China RoHS compliance
- Yes with exemptions
- Connection Code
- (3001:X:12)
- Connection material
- Copper
- Cv value [gal/min]
- 2.8 gal/min
- Design
- Piston
- EU RoHS compliance
- Yes with exemptions
- EU RoHS exemption clause
- 6(c)
- Flow direction
- Single-flow
- Flow direction indicator
- On product label
- Fluid Group
- 1
- Identical product
- 020B0133
- Ignition source assessment
- Yes
- Inlet connection type
- Solder, ODF
- Inlet size [mm]
- 12 mm
- Kv value [m³/h]
- 2.42 m³/h
- Lubricants compatibility
- Oilfree applications
- Max. Working Pressure [bar]
- 49 bar
- Max. Working Pressure [psig]
- 710 psig
- Min. Pressure drop [bar]
- 0.3 bar
- Min. Pressure drop [psi]
- 4.3 psi
- MinODP [bar]
- 0.2 bar
- MinODP [psi]
- 2.9 psi
- Oil free refrigerants
- R1234ze(E)
- Outlet connection type
- Solder, ODF
- Outlet size [mm]
- 12 mm
- 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)
- UL mark
- Yes
Standards & Compliance
- Material
- Valve body brass; connection tube copper; built-in damping piston; stronger spring (NRVH) — full material breakdown in the NRV/NRVH datasheet
- Pressure Rating
- 49 bar (710 psig) max working pressure
- Temperature Range
- -50 °C to 155 °C
- Classification / Approval
- CE, UL (C UL US Listed), 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, 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
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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 020B1037?
- 020B1037 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 020B1037.
- What is the HS code for 020B1037?
- The customs tariff (HS) code for 020B1037 is 8481.30.
- Who manufactures 020B1037?
- 020B1037 is a Danfoss product in the HVAC & Refrigeration range.
- Is a datasheet available for 020B1037?
- Yes — the 020B1037 datasheet can be viewed and downloaded on this page.
- What is the minimum order quantity for 020B1037?
- The minimum order quantity is 1.
- Is 020B1037 available?
- Yes — 020B1037 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).