Danfoss NRV 10s H Data sheet

Data sheet

Check valve for high pressure

Type NRV 10s H for R744 (CO2)

NRV 10s H check valves for R744 (CO2) can work as an internal relief valve when installed in parallel with GBC Ball Valves or service shut off valves, at the inlet and outlet of components to be serviced. The NRV 10s H can also be used in hot gas defrosting lines.

Features	yy The valve ensures that refrigerant only flow in	yy The valve can withstand 90 bar / 1305 psig
	one direction.	differential pressure and 90 bar / 1305 psig
	yy Allows for internal pressure relief in the	maximum working pressure.
	standstill system or during maintenance.

© Danfoss | DCS (nb) | 2019.12

AI223286434281-000502 | 1

Document type | Check valves, type NRV 10s H for R744 (CO2)

Technical data
	Refrigerants	R744 (CO2)
	Oil	POE, PAG
	Media temperature range	-50 – 140 °C / -58 – 285 °F
	Max. working pressure (PS/MWP)	90 bar / 1305 psig
	Approvals:

Notes:

For the application use with R744 as part of a secondary loop or cascade:

1.The design pressure of the refrigerant containing component is not less than the design pressure of the associated components.

2.The component is not provided with any pressure relief or pressure regulating relief valve and that a sufficient number of valves having capacity deemed adequate shall be field-installed on the refrigeration system.

3.When the refrigeration system is de-energized, venting of R744 may occur through the pressure regulating relief valves, and may need to be recharged, but the valve should not be defeated or bypassed.

4.A sufficient number of pressure relief and pressure regulating valves may need to be provided based upon system capacity and located such that no stop valve is provided between the relief valve and the parts or section of the system being protected.

Design

Ordering

1.Copper tube

2.Solder ring

3.Washer

4.Sealing disk with special material

5.Piston

6.Spring

7.Valve body

8.Guide

9.Stop face

10.Solder ring

11.Copper tube

	Connection	Connection		Min. OPD		Kv value 2)	Cv value 2)
Type		size		ΔP1				Code no.
	type
		[in.]	[mm]	[bar]	[psi]	[m3/h]	[gal/min]
NRV 10s H	Straightway	3⁄8		0.4	5.8	0.9	1.04	020B4000
	Solder ODF		10	0.4	5.8	0.9	1.04	020B4300

1)ΔP1 = Minimum Opening Pressure Differential

2)The kv value is the flow of water in m3/h at a pressure drop across valve of 1 bar, ρ = 1000 kg/m3. The Cv value is the flow of water in gal/min at a pressure drop across valve of 14.5 psi.

© Danfoss | DCS (bh) | 2019.12

AI223286434281-000502 | 2