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

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

-10 °C

0.15

156

245

456

780

0.25

201

316

589

1005

0.3

220

346

645

1102

0.4

254

399

745

1271

0.5

284

447

833

1422

EVRA/EVRAT 10 - 20 + NRVS

0.07 bar

EVRA/EVRAT 25 + NRVS

0.11 bar

An application has the following operating conditions

Refrigerant

R717

Evaporating temperature

-30 °C

Evaporator capacity (Q0)

290 kW

Circulation rate

4

Pressure

Δp ≤ 0.3 bar

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

Check valve, Type NRVS

NOTE:



The capacities in the table must be divided by the actual circulation rate, or the evaporator capacities must be multiplied with the actual circulation rate.

Table 6: Minimum opening dierential pressure

Table 7: Example

Solution

290 × 4 = 1160 kW EVRAT 25 + NRVS 25: Q0 = 1180 kW, at Δp = 0.3 bar is chosen

 NOTE:

Precise valve capacities can be calculated for various refrigerants by using the Danfoss Coolselector software.

For the valve combination of PM 15-25

Figure 2: For the valve combination of PM 15-25

Valve combination

PM 15

PM 20

PM 25

NRVS 25

kv (m3/h)

467.5

Evaporating temperature

T

e

Pressure

Δp (bar)

Capacities (kW) Q0 at circulation rate 1

R717

-50 °C

0.15--

-

0.25

653

979

1224

0.3

715

1072

1340

0.4

825

1238

1547

0.5

923

1384

1730

-40 °C

0.15--

-

0.25

635

951

1188

0.3

695

1043

1303

0.4

803

1204

1506

0.5

897

1346

1683

-30 °C

0.15--

-

0.25

615

922

1152

0.3

675

1011

1265

0.4

779

1169

1460

0.5

871

1306

1632

-20 °C

0.15--

-

0.25

595

894

1114

0.3

653

979

1224

0.4

753

1130

1412

0.5

852

1264

1580

-10 °C

0.15--

-

0.25

575

862

1075

0.3

629

944

1180

0.4

727

1090

1362

0.5

812

1219

1523

Check valve, Type NRVS

Table 8: For the valve combination of PM 15-25

 NOTE:

The capacities in the table must be divided by the actual circulation rate, or the evaporator capacities must be multiplied with the actual circulation rate.

Minimum opening dierential pressure:

PM + NRVS will be fully open at Δp = 0.25 bar.

 NOTE:

Precise valve capacities can be calculated for various refrigerants by using the Danfoss Coolselector software.

Dimensions and weights

Figure 3: NRVS on valve

Type

L [mm]

B [mm]

Weight

(1)

kg

NRVS 15

47.5780.1

NRVS 25

60.5960.25

Type

L [mm]

B [mm]

Weight

(2)

kg

NRVS 15

78800.1

NRVS 25

98960.25

Check valve, Type NRVS

Table 9: NRVS on valve

(1)

NRVS without anges and bolts

Figure 4: NRVS stand alone

Table 10: NRVS stand alone

(2)

NRVS without anges and bolts

Check valve

For valve type

Flanges, gasket and bolts

(1)

Flanges,gaskets and bolts for

NRVS stand alone

(3)

Flange type

Valve type

Code. no.

For valve type

Code no.

Weight

(2)

[kg]

Flange type

Connection size

Check valve

Flanges, gasket and bolts

(1)

NRVS 15

020-2032

EVRA/T 10, EVRA/T 15

027N1255

0.7

3

⁄4 in.

NRVS 25

020-2033

EVRA/T 20, EVRA/T 25,

PM 15, PM 20, PM 25

027N1254

1.1

1 in.

Flanges,gaskets and bolts for NRVS stand alone

(3)

Code no.

Weight

(2)

[kg]

Flange type

Connection size

027N1256

0.256

3

⁄4 in.

027N1257

0.443

1 in.

File name

Document type

Document topic

Approval authority

11-1-0310-2012

Explosive - Safety

Certicate

–

GPN

UA.089.D.00188-17

UA Declaration

PED

LLC CDC EURO TYSK

UA.TR-089.0993-17

Pressure - Safety

Certicate

PED

LLC CDC EURO TYSK

033F0691.AD

Manufacturers Declaration

RoHS

Danfoss

033F0686.AG

Manufacturers Declaration

PED

Danfoss

033F0453.AD

Manufacturers Declaration

ATEX

Danfoss

RU Д- FR.БЛ08.В.03804

EAC Declaration

Machinery & Equipment

EAC

Check valve, Type NRVS

Ordering

Table 11: NRVS 15-25 Ordering

Table 12: NRVS 15-25 Ordering

(1)

Consists of one standard and one special ange, one gasket and 2 bolts

(2)

Flange and bolts only

(3)

Consist of anges, gaskets, bolts and nuts only. One standard ange and one special ange, two gasket, 2 bolts and 2 nuts.



NOTE:

One standard ange and one special ange, two gasket, 2 bolts and 2 nuts.

Certicates, declarations, and approvals

The list contains all certicates, declarations, and approvals for this product type. Individual code number may have some or all of these approvals, and certain local approvals may not appear on the list.

Some approvals may change over time. You can check the most current status at danfoss.com or contact your local Danfoss representative if you have any questions.

Table 13: Valid Approvals

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Danfoss NRVS 15, NRVS 25 Data sheet

Specifications and Main Features

Frequently Asked Questions

User Manual