Danfoss SCA-X SS 15 - 40, CHV-X SS 15 - 40 Data sheet

Data Sheet

Check & stop valve, type SCA-X SS
Check valve, type CHV-X SS

Assures precision in harsh operating surroundings

In certain specic areas such as outdoor
applications and corrosive atmospheres, such
as coastal installations, there is a need for high
surface protection to prevent failure due to
corrosion.

Today's food safety standards often call for daily
treatment with detergents to protect against
bacteria growth, again producing a need for
high surface protection.

SCA-X SS are check valves with a built-in stop
valve function. CHV-X SS are check valves only.

The valves are designed to open at very low
dierential pressures, allow favourable ow
conditions and are easy to disassemble for
inspection and service.

The valve cone has a built-in exibility to
ensure a precise and tight closing towards the
valve seat.

A well balanced dampening eect between the
piston and the cylinder gives an optimal
protection during low loads and against
pulsations.

AI234986440164en-000701

Check & stop valve, type SCA-X SS and Check valve, type CHV-X SS

Features

• Applicable to HCFC, HFC, R717 (Ammonia), R744 (CO2), Propane, Butane, Iso-Butane and Ethane.
◦ R717 Heat Pump and Propylene applications with replaced O-ring.

• Designed to give favourable ow conditions.

• Internal backseating enables replacement of the spindle seal whilst the valve is active, i.e. under pressure (SCA-SS)

• Housing is made of special cold resistant stainless steel approved for low temperature operations.

• Easy to disassemble for inspection and service.

• Butt-weld DIN and ANSI connections.

• Max. operating pressure: 52 bar g (754 psig)

• Temperature range: –60/+150°C (–76 +302°F).

• Compact and light valves for easy handling and installation.

• 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.

© Danfoss | Climate Solutions | 2021.02 AI234986440164en-000701 | 2

Check & stop valve, type SCA-X SS and Check valve, type CHV-X SS

Media

Refrigerants

Applicable to HCFC, HFC, R717 (Ammonia), R744 (CO2), Propane, Butane, Iso-Butane and Ethane. R717 Heat Pump
and Propylene applications with replaced O-ring.

For further information refer to the installation guide for SCA-X SS/CHV-X SS.

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.

© Danfoss | Climate Solutions | 2021.02 AI234986440164en-000701 | 3

-70 -50 -30 -10 10 30 50 70 90 110 130 150

-94 -58 -22 14 50 86 122 158 194 230 266 302

˚C

˚F

0

73

145

218

290

363

435

508

580

653

725

798

psi

0

5

10

15

20

25

30

35

40

45

50

55

bar

Temperature

Pressure

SCA-X SS/CHV-X SS DN15-DN40

Description

Values

Temperature range

-60 °C/+150 °C (-76 °F/+302 °F)

Max. working pressure

52 bar (754 psig)

Check & stop valve, type SCA-X SS and Check valve, type CHV-X SS

Product specication

Pressure and temperature range

Figure 1: Pressure and temperature range graph

Table 1: Pressure and temperature

Design

Housing

Made of stainless steel approved for low temperature operations.

Valve cone

Valve cone with built in metallic stop - prevents damage to teon ring in case of overtightening.

Damping chamber

The chamber is lled with refrigerants (gas or liquid), which provides a damping eect when the valve opens and
closes.

Spindle (SCA-X SS)

Made of polished stainless steel, which is ideal for O-ring sealing.

Packing Gland (SCA-X SS)

The “full temperature range” packing gland is the standard for the entire SVL platform.

This ensures perfect tightness throughout the whole temperature range: -60 °C/+150 °C (-76 °F/+302 °F).

Installation

The valve must be mounted vertically with the cone downwards.

The valve is designed to resist very high internal pressure. However, the piping system in general should be
designed to avoid liquid traps and reduce the risk of hydraulic pressure caused by thermal expansion.

For further information refer to installation guides for SCA-X SS/CHV-X SS.

If cold refrigeration oil having low viscosity enters and settles in the damping chamber, problems with the check
valve may arise. Consequently, it may be necessary to modify the valve for more viscous liquids by enlarging the
hole to the damping chamber.

© Danfoss | Climate Solutions | 2021.02 AI234986440164en-000701 | 4

C

H

E

C

K

V

A

L

V

E

C

H

V

-

X

S

S

D

N

1

5

/

½

”

T

ØD

Danfoss

A148B15.10

Size

OD

T

15mm21.3

2.3½in.

0.839

0.09120mm

26.9

2.3¾in.

1.059

0.09125mm

33.7

2.61in.

1.327

0.10332mm

42.4

2.61¼in.

1.669

0.10240mm

48.3

2.61½in.

1.902

0.103

T

ØD

Check & stop valve, type SCA-X SS and Check valve, type CHV-X SS

Figure 2: Example of marking ring, CHV-X SS

Connections

Available with the following connections:

• Butt-weld DIN (EN 10220) DN 15 - 40 (½ - 1½ in.)

• Butt-weld ANSI (B 36.19M) DN 20 - 40 (¾ - 1½ in.)

Figure 3: DIN

Table 2: Butt-weld DIN (EN 10220)

Figure 4: ANSI

© Danfoss | Climate Solutions | 2021.02 AI234986440164en-000701 | 5

Size

OD

T

20mm26.9

2.9¾in.

1.06

0.1125mm

33.7

3.51in.

1.33

0.1432mm

42.4

3.61¼in.

1.67

0.1440mm

48.3

3.71½in.

1.9

0.15

17

8

9

4
3

12

13

7

14

5

1

16

15

2

6

11

10

Danfoss

M148G0008_1

Danfoss

M148G0009_1

1

2

3

5

14

13

12

6

15

SCA-X SS 15 - 40 CHV-X SS 15 - 40 CHV-X SS 15 - 40

Danfoss

148G237_02-2017

12

2

3

13

14

5

6

1

15

No.

Part

Material

DIN/EN

ISO

ASTM

1

Housing

Stainless steel

GX5CrNi19-10
EN10213-4

AISI 304

2

Bonnet, Flange

Stainless steel

X5CrNi18-10
EN10088

AISI 304

3

Bonnet, Insert

Stainless steel

X8CrNiS18-9
DIN 17440

4

Spindle

Stainless steel

X8CrNiS18-9
DIN 17440

Type 17, 17440

AISI 303

5

Cone

Steel
Teon (PTFE)

6

O-ring

Cloroprene (Neoprene)

7

Spindle extension

Steel

8

Packing gland O-rings

Stainless steel
Cloroprene (Neoprene)

9

Packing washer

Aluminium

10

Spring loaded seal

Teon (PTFE)

11

O-ring

Cloroprene (Neoprene)

12

Bolts

Stainless steel

A2-70

A2-70

Type 308

13

Gasket

Fiber, non-asbestos

Check & stop valve, type SCA-X SS and Check valve, type CHV-X SS

Table 3: Butt-weld ANSI (B 36.19M, SCHEDULE 40)

Material specication

Table 4: Parts list and materials

© Danfoss | Climate Solutions | 2021.02 AI234986440164en-000701 | 6

Fmin

øD

C

G

G

H

G
B

C

E

H

DANFOSS

148G238_02-2017

No.

Part

Material

DIN/EN

ISO

ASTM

14

Spring

Steel15Identication ring

Stainless steel

16

Seal cap gasket

Nylon17Spindle seal cap

Aluminium

Valve size

UnitsCG

∅D

F

min

H

Weight

SCA-X SS 15 (½ in.)

mm
in.

212

8.35451.77381.50602.36602.36

1.6 kg

3.53 lb

SCA-X SS 20 (¾

mm
in.

212

8.35451.77381.50602.36602.36

1.6 kg

3.53 lb

SCA-X SS 25 (1 in.)

mm
in.

295

11.61552.17501.97853.35702.76

3.2 kg

7.05 lb

SCA-X SS 32 (1¼ in.)

mm
in.

295

11.61552.17501.97853.35702.76

3.2 kg

7.05 lb

SCA-X SS 40 (1½ in.)

mm
in.

295

11.61552.17501.97853.35702.76

3.2 kg

7.05 lb

Valve size

UnitsCG

F

min

H

Weight

CHV-X SS 15 (½ in.)

mm
in.

103

4.06451.77602.36602.36

1.2 kg

2.65 lb

CHV-X SS 20 (¾

mm
in.

103

4.06451.77602.36602.36

1.2 kg

2.65 lb

CHV-X SS 25 (1 in.)

mm
in.

143

5.63552.17853.35702.76

2.3 kg

5.07 lb

CHV-X SS 32 (1¼ in.)

mm
in.

143

5.63552.17853.35702.76

2.3 kg

5.07 lb

CHV-X SS 40 (1½ in.)

mm
in.

143

5.63552.17853.35702.76

2.3 kg

5.07 lb

Check & stop valve, type SCA-X SS and Check valve, type CHV-X SS

Dimensions and weights

SCA-X SS/CHV-X SS 15 - 40 (½- 1½ in.)

Figure 5: SCA-X SS 15 - 40

Figure 6: CHV-X SS 15 - 40

Table 5: SCA-X SS 15 - 40

Table 6: CHV-X SS 15 - 40 Angleway

© Danfoss | Climate Solutions | 2021.02 AI234986440164en-000701 | 7

Valve size

UnitsCBEG

F

min

H

Weight

CHV-X SS 15 (½
in.)

mm
in.993.90

114

4.49190.75

120

4.72602.36602.36

1.3kg

2.87lb

CHV-X SS 20 (¾

mm
in.993.90

114

4.49190.75

120

4.72602.36602.36

1.3kg

2.87lb

CHV-X SS 25 (1 in.)

mm
in.

141

5.55

157

6.18261.02

155

6.10853.35702.76

2.6kg

5.73lb

CHV-X SS 32 (1¼
in.)

mm
in.

141

5.55

157

6.18261.02

155

6.10853.35702.76

2.6kg

5.73lb

CHV-X SS 40 (1½
in.)

mm
in.

141

5.55

157

6.18261.02

155

6.10853.35702.76

2.6kg

5.73lb

Check & stop valve, type SCA-X SS and Check valve, type CHV-X SS

Table 7: CHV-X SS 15 - 40 Straightway

Specied weights are approximate values only.

© Danfoss | Climate Solutions | 2021.02 AI234986440164en-000701 | 8

Valve type

SCA-X SS

CHV-X SS

Stop Check Valve
Check Valve

(valve size measured on the
connection diameter)

D

A

15

DN 15

x

20

DN 20

xx25

DN 25

xx32

DN 32

xx40

DN 40

x

x

Connections

D
A

Butt-weld connection: DIN EN 10220
Butt-weld connection: ANSI B 36.19M

Valve housing

ANG

Angle ow

STR

Straight ow

Size

Type

Code No.

mm

in.

15

½

SCA-X SS 15 D ANG

148B5293

20

¾

SCA-X SS 20 D ANG

148B5381

25

1

SCA-X SS 25 D ANG

148B5490

32

1¼

SCA-X SS 32 D ANG

148B5585

40

1½

SCA-X SS 40 D ANG

148B5664

Size

Type

Code No.

mm

in.

20

¾

SCA-X SS 20 A40 ANG

148B6489

25

1

SCA-X SS 25 A40 ANG

148B6480

32

1¼

SCA-X SS 32 A40 ANG

148B6490

40

1½

SCA-X SS 40 A40 ANG

148B5687

Size

Type

Code No.

mm

in.

15

½

CHV-X SS 15 D ANG

148B5294

20

¾

CHV-X SS 20 D ANG

148B5382

25

1

CHV-X SS 25 D ANG

148B5491

32

1¼

CHV-X SS 32 D ANG

148B5586

40

1½

CHV-X SS 40 D ANG

148B5665

Check & stop valve, type SCA-X SS and Check valve, type CHV-X SS

Ordering

Ordering complete valves

How to order

The table below is used to identify the valve required.

Please note that the type codes only serve to identify the valves, some of which may not from part of the standard
product range.

Table 8: Valve type

 IMPORTANT:

Where products need to be certied according to specic certication societies the relevant information should be
included at the time of order.

SCA-X SS Angleway

Table 9: Butt-weld DIN (EN 10220)

Table 10: Butt-weld ANSI (B 36.19M SCHEDULE 40)

CHV-X SS Angleway

Table 11: Butt-weld DIN (EN 10220)

© Danfoss | Climate Solutions | 2021.02 AI234986440164en-000701 | 9

Size

Type

Code No.

mm

in.

20

¾

CHV-X SS 20 A40 ANG

148B6491

25

1

CHV-X SS 25 A40 ANG

148B6481

32

1¼

CHV-X SS 32 A40 ANG

148B6492

40

1½

CHV-X SS 40 A40 ANG

148B5688

Size

Type

Code No.

mm

in.

15

½

CHV-X SS 15 D STR

148B5678

20

¾

CHV-X SS 20 D STR

148B5679

25

1

CHV-X SS 25 D STR

148B5680

32

1¼

CHV-X SS 32 D STR

148B6544

40

1½

CHV-X SS 40 D STR

148B6566

Size

Type

Code No.

mm

in.

20

¾

CHV-X SS 20 A40 STR

148B6608

25

1

CHV-X SS 25 A40 STR

148B6609

32

1¼

CHV-X SS 32 A40 STR

148B6610

40

1½

CHV-X SS 40 A40 STR

148B6611

Size

O-ring kit for

mm

in.

R717 Heat pump

R1270 Propylene

15

½

148B6070

148B6077

20¾25

1

148B6071

148B6078

321¼40

1½

Check & stop valve, type SCA-X SS and Check valve, type CHV-X SS

Table 12: Butt-weld ANSI (B 36.19M SCHEDULE 40)

CHV-X SS Straightway

Table 13: Butt-weld DIN (EN 10220)

Table 14: Butt-weld ANSI (B 36.19M SCHEDULE 40)

ANG = Angleway
STR = Straightway
For further information please contact your local Danfoss Sales Company.

Replacement kit

Replacement kit (O-ring replacement) for R717 Ammonia Heat Pump* and Propylene applications (including ID tag)

Table 15: O-ring kit

* Replacement kits for R717 Ammonia Heat Pump is applicable for continuous operating temperature between
+100 °C to 150 °C (212 °F to 302 °F)

© Danfoss | Climate Solutions | 2021.02 AI234986440164en-000701 | 10

The SCA-X SS/CHV-X SS valves are approved according to the European standard specied in the Pressure Equipment Di­rective and are CE marked.

SCA-X SS/CHV-X SS valves

Nominal bore

DN = < 25 mm (1 in.)

DN32-40 mm (1¼ - 1½ in.)

Classied for

Fluid group I

Category

Article 3, paragraph 3

II

File name

Document type

Document topic

Approval authority

03709-F0 BV

Marine - Safety Certicate

-BVTAP0000001 Rev. 1

Marine - Safety Certicate

-

DNV GL

033F0685.AK

EU Declaration

EMCD/PED

Danfoss

033F0691.AE

Manufacturers Declaration

RoHS

Danfoss

Check & stop valve, type SCA-X SS and Check valve, type CHV-X SS

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 16: Pressure Equipment Directive (PED)

Table 17: SCA-X SS/CHV-X SS valves

Table 18: Certicates and declarations

© Danfoss | Climate Solutions | 2021.02 AI234986440164en-000701 | 11

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