Danfoss NRVS 15, NRVS 25 Data sheet
Data Sheet
Check valve
Type NRVS
For industrial refrigeration in liquid line applications
Check valve type NRVS has no damping feature and therefore can only be used for liquid line applications. NRVS is designed to be mounted directly to PM or solenoid valves EVRA/EVRAT.
Features:
• Ensures correct direction of flow
• Applicable to HCFC, HFC and R717 (Ammonia)
• Classification: DNV, CRN, BV, EAC etc.
• To get an updated list of certification on the products please contact your local Danfoss Sales Company
AI173386419455en-000601
Check valve, Type NRVS
Portfolio overview
Table 1: NRVS variants
|
|
|
NRVS 15 |
|
NRVS 25 |
|
|
|
|
|
|
|
|
Table 2: Portfolio overview |
|
|
|
|||
|
|
|
||||
Description |
NRVS 15 |
NRVS 25 |
||||
Refrigerants |
R134a, R22, R401A, R402A, R404A, R407A, R407B, |
R134a, R22, R401A, R402A, R404A, R407A, R407B, |
||||
R407C, R407F, R409A, R410A, R421A, R502, R507, R717 |
R407C, R407F, R409A, R410A, R421A, R502, R507, R717 |
|||||
|
|
|
||||
|
|
|
EVRA 10 -15 |
EVRA 20 - 25 |
||
Used for product |
EVRAT 20 - 25 |
|||||
EVRAT 10 - 15 |
||||||
|
|
|
PM 15 - 25 |
|||
|
|
|
|
|
||
Application |
Liquid line applications |
Liquid line applications |
||||
Media temperature range |
-50 °C – 140 °C (-58 °F - 284 °F) |
-50 °C – 140 °C (-58 °F - 284 °F) |
||||
MWP [bar/psig] |
28 bar/406 psig |
28 bar/406 psig |
||||
|
|
|
|
|
4.1 for EVRA/EVRAT 20 |
|
k |
|
(m3/h) |
1.4 for EVRA/EVRAT 10 |
7.0 for EVRA |
||
|
4.0 for PM 15 |
|||||
v |
2.2 for EVRA/EVRAT 15 |
|||||
|
|
6.0 for PM 20 |
||||
|
|
|
|
|
||
|
|
|
|
|
7.5 for PM 25 |
|
Packing format |
Multi pack (12 pcs) |
Multi pack (10 pcs) |
||||
|
|
|
|
|
|
|
Media
Refrigerants
Applicable to HCFC, HFC and R717 (Ammonia). Flammable hydrocarbons are not recommended. The valve is only recommended for use in closed circuits. For further information please contact Danfoss (store.danfoss.com/en/).
New refrigerants
Danfoss products are continually evaluated for use with new refrigerants depending on market requirements.
When a refrigerant is approved for use by Danfoss, it is added to the relevant portfolio, and the R number of the refrigerant (e.g. R513A) will be added to the technical data of the code number. Therefore, products for specific refrigerants are best checked at store.danfoss.com/en/, or by contacting your local Danfoss representative.
© Danfoss | Climate Solutions | 2021.02 |
AI173386419455en-000601 | 2 |
Check valve, Type NRVS
Product specifications
Pressure and temperature data
Table 3: Pressure and temperature data
Temperature of medium |
-50 °C – 140 °C (-58 °F - 284 °F) |
Maximum working pressure |
PS = 28 bar/406 psig |
|
|
Design
Table 4: Design
Materials |
Valve housing made of Stainless Steel |
|
Gaskets are non-asbestos |
||
|
||
Capacity tables |
|
For the valve combination of EVRA/EVRAT
Figure 1: For the valve combination of EVRA/EVRAT
Location of valve in system (marked with grey) |
|
Low pressure liquid line |
Hot gas by-pass & defrost line |
|
<![if ! IE]> <![endif]>MS |
|
Discharge |
<![if ! IE]> <![endif]>Danfoss 27N8159_ |
|
|
|
Wet suction line Dry suction line |
line |
|
|
|
NRVS
Liquid line without phase change Liquid line with or without phase change
Table 5: For the valve combination of EVRA/EVRAT
Valve combination |
|
EVRA/EVRAT 10 + NRVS 15 EVRA/EVRAT 15 + NRVS 15 EVRA/EVRAT 20 + NRVS 25 |
EVRA + NRVS 25 |
||
kv (m3/h) |
|
1.4 |
2.2 |
4.1 |
7 |
Evaporating temperature |
Pressure |
|
Capacities (kW) Q0 at circulation rate 1 |
|
|
Te |
Δp (bar) |
|
|
R717 |
|
|
0.15 |
172 |
270 |
504 |
960 |
|
0.25 |
222 |
349 |
650 |
1110 |
-40 °C |
0.3 |
243 |
382 |
713 |
1216 |
|
0.4 |
281 |
441 |
823 |
1405 |
|
0.5 |
314 |
493 |
920 |
1570 |
|
0.15 |
167 |
262 |
489 |
835 |
|
0.25 |
215 |
338 |
631 |
1078 |
-30 °C |
0.3 |
236 |
371 |
691 |
1180 |
|
0.4 |
273 |
428 |
798 |
1363 |
|
0.5 |
305 |
479 |
893 |
1524 |
|
0.15 |
161 |
254 |
473 |
808 |
|
0.25 |
208 |
327 |
610 |
1042 |
-20 °C |
0.3 |
228 |
359 |
669 |
1142 |
|
0.4 |
264 |
414 |
772 |
1319 |
|
0.5 |
295 |
463 |
863 |
1475 |
|
|
|
|
|
|
© Danfoss | Climate Solutions | 2021.02 |
AI173386419455en-000601 | 3 |
Loading...