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 ow

• Applicable to HCFC, HFC and R717 (Ammonia)

• Classication: DNV, CRN, BV, EAC etc.

• To get an updated list of certication on the products please contact your local Danfoss Sales Company

AI173386419455en-000601

NRVS 15

NRVS 25

Description

NRVS 15

NRVS 25

Refrigerants

R134a, R22, R401A, R402A, R404A, R407A, R407B, R407C, R407F, R409A, R410A, R421A, R502, R507, R717

Used for product

EVRA 10 -15 EVRAT 10 - 15

EVRA 20 - 25 EVRAT 20 - 25 PM 15 - 25

Application

Liquid line applications

Media temperature range

-50 °C – 140 °C (-58 °F - 284 °F)

MWP [bar/psig]

28 bar/406 psig

kv (m3/h)

1.4 for EVRA/EVRAT 10

2.2 for EVRA/EVRAT 15

4.1 for EVRA/EVRAT 20

7.0 for EVRA

4.0 for PM 15

6.0 for PM 20

7.5 for PM 25

Packing format

Multi pack (12 pcs)

Multi pack (10 pcs)

Check valve, Type NRVS

Portfolio overview

Table 1: NRVS variants

Table 2: Portfolio overview

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 specic refrigerants are best checked at store.danfoss.com/en/, or by contacting your local Danfoss representative.

Temperature of medium

-50 °C – 140 °C (-58 °F - 284 °F)

Maximum working pressure

PS = 28 bar/406 psig

Materials

Valve housing made of Stainless Steel Gaskets are non-asbestos

Location of valve in system (marked with grey)

NRVS

Liquid line without phase change Liquid line with or without phase change

Hot gas by-pass & defrost line

Discharge line

Wet suction line

Dry suction line

Danfoss

27N8159_MS

Low pressure liquid line

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

T

e

Pressure

Δp (bar)

Capacities (kW) Q0 at circulation rate 1

R717

-40 °C

0.15

172

270

504

960

0.25

222

349

650

1110

0.3

243

382

713

1216

0.4

281

441

823

1405

0.5

314

493

920

1570

-30 °C

0.15

167

262

489

835

0.25

215

338

631

1078

0.3

236

371

691

1180

0.4

273

428

798

1363

0.5

305

479

893

1524

-20 °C

0.15

161

254

473

808

0.25

208

327

610

1042

0.3

228

359

669

1142

0.4

264

414

772

1319

0.5

295

463

863

1475

Check valve, Type NRVS

Product specications

Pressure and temperature data

Table 3: Pressure and temperature data

Design

Table 4: Design

Capacity tables

For the valve combination of EVRA/EVRAT

Figure 1: For the valve combination of EVRA/EVRAT

Table 5: For the valve combination of EVRA/EVRAT