Danfoss SV 1, SV 3 Data sheet

Data Sheet

Float valve Type SV 1 and SV 3

For industrial refrigeration liquid level regulation

Several oat valves are available for Industrial refrigeration liquid level control in the product group “Liquid level regulating valves”, such as HFI and SV series. The SV series contains the following types: SV 1, SV 3, SV 4, SV 5 and SV 6, some of which can be delivered as dedicated “E” versions for hydrocarbon application.

The SV 1 and SV 3 can be used separately as a modulating liquid level regulator in refrigerating, freezing and air conditioning systems for ammonia or uorinated refrigerants.However, in most cases, the SV is used as a oat pilot valve for the main expansion valve type PMFH.

The SV 1 and SV 3 are used as liquid level regulators in either low pressure applications or in high pressure applications. Adaptation to the specic application is done by the orientation of the valve and thereby the oat functions

AI221686430747en-001001

Description

Values

Refrigerants

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

Application

High Pressure Liquid Level Control System (HP LLRS) Low Pressure Liquid Level Control System (LP LLRS)

Design versions

Media temperature range

-50 °C – 65 °C

P-band [mm]

35 mm

MWP [bar]

28 bar

K

v

value [m3/h]

0.06 for SV 1

0.14 for SV 3

Rated capacity (kW)

SV1: 25 SV3: 64 (R717 +5/32 °C, Tl = 28 °C)

Float valve, Type SV 1 and SV 3

Portfolio overview

The SV 1 and SV 3 can be used separately as a modulating liquid level regulator in refrigerating, freezing and air conditioning systems for ammonia or uorinated refrigerants.

However, in most cases, the SV is used as a oat pilot valve for the main expansion valve type PMFH.

Several oat valves are available for Industrial refrigeration liquid level control in the product group “Liquid level regulating valves”, such as HFI and SV series. The SV series contains the following types: SV 1, SV 3, SV 4, SV 5 and SV 6, some of which can be delivered as dedicated “E” versions for hydrocarbon application.

Figure 1: Float valve SV 1 and SV 3

Table 1: Portfolio overview

Float valve, Type SV 1 and SV 3

Applications

SV (L), low-pressure function

SV (L) is used for small, ooded evaporators, where only slight variations in the liquid level can be accepted.

When the liquid level falls, the oat pos. (2) moves downwards. This draws the needle pos. (15) away from the orice and the amount of liquid injected is increased.

The liquid inlet line, which is mounted on the nipple pos. (C), should be dimensioned in such a way that acceptable

liquid velocities and pressure drops are obtained.

This is particularly important when the liquid is only slightly subcooled, since valve capacity is reduced considerably if ashgas occurs in the liquid ahead of the orice and wear is strongly increased.

See the suggested dimensions for the liquid line in "Pipe dimensions". Refer section Dimensions and weights

The ashgas quantity which occurs on expansion is removed through the balance pipe from pos. (D). On refrigeration plant using uorinated refrigerants, slight subcooling and a large pressure drop can give a ashgas quantity of approx. 50% of the injected liquid quantity. Therefore the pressure drop in this balance pipe must be kept at a minimum, since there will otherwise be a risk that the liquid level in the evaporator will vary to an unacceptable degree as a function of evaporator load the absolute dierence between the liquid level of the evaporator and the SV valve will be too large.

See the suggested dimensions for the balance pipe in "Pipe dimensions". Refer section Dimensions and weights

Figure 2: SV (L), low-pressure function

SV (H), high-pressure function

When the liquid level rises, the oat pos. (2) moves upwards. This draws the needle pos. (15) away from the orice and the excess liquid is drawn away.

On refrigeration plant using uorinated refrigerants slight subcooling and a large pressure drop can, as already mentioned, cause the formation of a large amount of ashgas.

This mixture of liquid and vapour has to pass through the nipple pos. (C) and out into the liquidline.

If the dimensions of the line are too small, a pressure drop will occur which can reduce the capacity of the SV (H) valve considerably. This will mean a risk of inadvertent liquid accumulation in the condenser or receiver.

SV(L)

10 32 22

P-connection

SV(L)

10 32 22

S-connection

Float valve, Type SV 1 and SV 3

See the suggested dimensions for the liquid line in "Pipe dimensions". Refer section Dimensions and weights

Figure 3: SV (H), high-pressure function

The connection nipple (C) can be mounted either in P or in S

Figure 4: P-connection (= parallel)

 NOTE:

With P-connection an SV with closed oat orice will have a capacity which corresponds to the degree of opening of the adjustable throttle valve 10.

Figure 5: S-connection (= series)



NOTE:

With S-connection the throttle valve 10 will function as a pre-orice on SV (L) and as a post orice on SV (H)

SV 1 - 3 used as a high pressure defrost drain oat valve

SV 1 - SV 3 can be used as a defrost drain oat valve, when one balance pipe is sealed o and the liquid level regulator is mounted with a special kit (code no. 027B2054) consisting of:

• Special orice and orice needle with a larger kv-value of 0.28 m3/h.

• Gas drain pipe

Liquid out to wet suction

Condensed liquid in from evaporator

Wet suction line

Liquid line

PMLX

SVI-3

EVRAT

REG

NRVA

Hotgas line

EVRAT

FA

Float valve, Type SV 1 and SV 3

Figure 6: SV 1 - 3 tted with the special kit (code no. 027B2054)

Figure 7: Application example



NOTE:

SV 1 - 3 with special kit mounted as defrost drain foat valve on a fooded evaporator with hotgas defrost.

Float valve, Type SV 1 and SV 3

Media

Refrigerants

The SV 1 and SV 3 can be used separately as a modulating liquid level regulator in refrigerating, freezing and air conditioning systems for ammonia or uorinated refrigerants.

SV oat valves are currently authorized by Danfoss for use with several R numbers HCFC, non-ammable HFC, Ammonia, CO2 and hydrocarbons. New refrigerants are added frequently to the list of Danfoss approved refrigerants and added to the product types.

For an exhaustive and updated list, look up a code number in https://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.

C

D

P

S

Nipple

Connection for balance pipe

Parallel connection of pos. C (screw 17 in pos. A)

Series connection of pos. C (screw 17 in pos. B)

Description

Values

P band

35 mm

Temperature of medium

-50 °C – 65 °C

Max. working pressure

PS = 28 bar

Max. test pressure

p' = 36 bar

kv value for oat orice

SV 1 = 0.06 m3/h SV 3 = 0.14 m3/h

No.

Part

Material

DIN / EN

1

Float housing

Stainless steel Low temperature, steel

X5CrNi18-10, DIN 17440 P285QH, EN 10222-4

2

Float

Stainless steel

3

Split pin

Steel4Float arm

Stainless steel

5

Link

Steel6Pin

Stainless steel

7

Valve housing

Steel8O-ring

Cloroprene (Neoprene)

9

Float orice

Plastic10Manual regulation unit. Throttle valve

Steel11Gasket

Non asbestos

12

Plug

Steel13O-ring

Cloroprene (Neoprene)

14

Pilot connection (spare part)

Steel15Orice needle

Plastic

Float valve, Type SV 1 and SV 3

Product specication

Pressure and temperature data

Table 2: Pressure and temperature data

NOTE:



The highest kv value for the built-in throttle valve is 0.18 m3/h. The throttle valve can be used both in parallel and in series with the oat orice.

Material specication

SV with low-pressure function

Figure 8: SV with low-pressure function

Table 3: SV with low-pressure function

C

D

P

S

Nipple

Connection for balance pipe

Parallel connection of pos. C (screw 17 in pos. A)

Series connection of pos. C (screw 17 in pos. B)

No.

Part

Material

DIN / EN

16

O-ring

Cloroprene (Neoprene)

17

Screw

Steel18Gasket

Non asbestos

19

Steel

20

Cover

Low temperature, cast iron (spherical)

EN-GJS-400-18-LT EN 1563

21

Screw

Stainless steel

A2-7022Gasket

Non asbestos

23

Label

Cardboard

25

Screw

Steel26Spring washer

Steel28Sign

Aluminium

No.

Part

Material

DIN / EN

1

Float housing

Stainless steel Low temperature, steel

X5CrNi18-10, DIN 17440 P285QH, EN 10222-4

2

Float

Stainless steel

3

Split pin

Steel4Float arm

Stainless steel

5

Link

Steel6Pin

Stainless steel

7

Valve housing

Steel8O-ring

Cloroprene (Neoprene)

9

Float orice

Plastic10Manual regulation unit. Throttle valve

Steel11Gasket

Non asbestos

12

Plug

Steel13O-ring

Cloroprene (Neoprene)

14

Pilot connection (spare part)

Steel15Orice needle

Plastic16O-ring

Cloroprene (Neoprene)

17

Screw

Steel18Gasket

Non asbestos

19

Steel

20

Cover

Low temperature, cast iron (spherical)

EN-GJS-400-18-LT EN 1563

Float valve, Type SV 1 and SV 3

SV with high-pressure function

Figure 9: SV with high-pressure function

Table 4: SV with high-pressure function

No.

Part

Material

DIN / EN

21

Screw

Stainless steel

A2-7022Gasket

Non asbestos

23

Label

cardboard

25

Screw

Steel26Spring washer

Steel28Sign

Aluminium

DANFOSS

27F691_01-2017

M16 × 1.5

AF 19

G 3/8 A

AF 22

∅ 6.5 / ∅ 10

Type

Evaporating tempera‐

ture te °C

Capacity in kW at pressure drop across valve ∆p bar

0.8

1.2

1.624812

16

SV 1

10

9.511131520273009.912141520273133-10

1012141521273133-20

1112141521273033-30

1112141520263033-40

1113141520262932-50

11121315202629

32

SV 3

10

2531353952717702632364052697883-10

2632364052687783-20

2631353952677682-30

2530343850667582-40

2429333649657380-50

23273135476471

79

Type

Evaporating tempera‐

ture te °C

Capacity in kW at pressure drop across valve ∆p bar

0.8

1.2

1.624812

16

SV 1

10

2.2

2.633.2

4.2

4.8

5.7

5.702.3

2.7

3.1

3.4

4.4

4.9

5.8

-10

2.4

2.8

3.2

3.5

4.555.8

5.9

-20

2.4

2.9

3.3

3.6

4.655.8

5.8

−30

2.5

2.9

3.3

3.6

4.555.7

5.7

-40

2.5

2.9

3.3

3.6

4.4

4.9

5.6

-50

2.6

2.9

3.3

3.5

4.3

4.8

5.4

Float valve, Type SV 1 and SV 3

Connections

Table 5: Pilot connection (weld / solder)

Capacity tables

The values in the capacity tables are based on a subcooling of 4 K just ahead of the SV valve.

If the subcooling is more or less than 4 K, refer to the correction factors provided after the capacity tables.

Table 6: R717 (ammonia)

Table 7: R22

Type

Evaporating tempera‐

ture te °C

Capacity in kW at pressure drop across valve ∆p bar

0.8

1.2

1.624812

16

SV 3

10

5.6

6.8

7.7

8.51113151505.878

8.811131515

-10

6

7.3

8.2912131515-20

6.1

7.3

8.3

8.911131415

-30

6.2

7.3

8.1

8.811121414

-40

6.1

7.1

7.9

8.511121414

-50

5.9

6.9

7.6

8.211121314

∆t K

24101520253035404550k1.0110.98

0.96

0.94

0.92

0.91

0.89

0.87

0.86

0.85

∆t K

24101520253035404550k1.0110.96

0.93

0.9

0.87

0.85

0.83

0.8

0.78

0.77

74.5

106

132

170.5

92

5+2

122.6

155

141.5

ID 28

ID 6.8 OD 9.8

Danfoss

27B326.12

Type

Weight

SV 1

5.7 kg

SV 3

5.7 kg

Float valve, Type SV 1 and SV 3

Correction factors

When dimensioning, multiply the evaporator capacity by a correction factor k dependent on the subcooling Δt just ahead of the valve. The corrected capacity can then be found in the capacity table.

Table 8: R717 (ammonia)

Table 9: R22

sub

Dimensions and weights

Figure 10: SV1 and SV3

Table 10: SV 1 and SV 3 Dimensions and weights

Pipe dimensions

Liquid line

Type

Dimensions

0.8 bar < ∆psv < 4 bar

4 bar < ∆psv < 16 bar

Steel tube

SV 1

3

⁄8 in.3⁄8 in.

SV 3

3

⁄8 in.1⁄2 in.

Type

Dimensions

0.8 bar < ∆psv < 4 bar

4 bar < ∆psv < 16 bar

Steel tube

Copper tube

Steel tube

Copper tube

SV 1

3

⁄8 in.3⁄8 in.3⁄8 in.1⁄2 in.

SV 3

3

⁄8 in.5⁄8 in.1⁄2 in.3⁄4 in.

Type

Dimensions

SV (L) 1

1 in.

SV (L) 3

1

⁄2 in.

Float valve, Type SV 1 and SV 3

The following suggested dimensions for the liquid line, which is connected to the nipple pos. C are based on a maximum velocity in a line with subcooled ammonia of approx. 1 m/s and a maximuM velocity in a line with subcooled uorinated refrigerant of approx. 0.5 m/s.

Table 11: R717 (ammonia)

Table 12: R22, R134a, R404A

Table 13: Upper balance pipe (connect to pos. D on SV (L)

Valve type

Rated capacity in kW

Packing format

Qty./pack

Code no.

R717

R22

R134a

R404A

R12

R502

SV 1

25

4.7

3.9

3.7

3.1

3.4

Single pack

1 pc

027B2021

SV 3

641310

9.7

7.9

8.8

Single pack

1 pc

027B2023

Float valve, Type SV 1 and SV 3

Ordering

Table 14: SV 1 - SV 3 Ordering

NOTE:



The code nos. stated apply to oat valves, types SV 1 and SV 3 incl. ∅ 6.5 / ∅ 10 mm weld connection line. Balance tube connection (liquid/vapour): 1 in. weld / 1

1

⁄8 in. solder.

The rated capacity refers to the valve capacity at evaporating temperature te = +5 °C, condensing temp. tc = +32 °C and liquid temperature tl = +28 °C.

(1)

for the pilot

1

3

⁄8 in. are connection can be supplied under code no. 027B2033.

File name

Document type

Document topic

Approval authority

Д-DK.БЛ08.В.00191_18

EAC Declaration

Machinery & Equipment

EAC RU

0045 202 1204 Z 00354 19 D 001(00)

Pressure - Safety Certicate

TÜV

Д-DK.РА01.B.72054_20

EAC Declaration

PED

EAC RU

EU 033F0685.AK

EU Declaration

EMCD/PED

Danfoss

033F0691.AD

Manufacturers Declaration

RoHS

Danfoss

033F0473.AD

Manufacturers Declaration

ATEX

Danfoss

Д-DK.БЛ08.В.01592

EAC Declaration

EMC

EAC RU

Д-DK.МХ24.В.00273

EAC Declaration

Machinery & Equipment

EAC RU

Д-DK.БЛ08.B.01120_19

EAC Declaration

EMC

EAC RU

UL SA7200

Mechanical - Safety Certicate

UL

UA.1O146.D.00069-19

UA Declaration

PED

LLC CDC EURO-TYSK

UA.TR-089.1112.01-19

Pressure - Safety Certicate

PED

LLC CDC EURO-TYSK

Type

SV 1 and SV 3

Classied for

Fluid group I

Category

I

Pressure Equipment Directive (PED)

SV 1 and SV 3 are approved in accordance with the European standard specied in the Pressure Equipment Directive and are CE marked. For further details / restrictions - see Installation guide.

Float valve, Type SV 1 and SV 3

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 15: Valid Approvals

Table 16: Compliance table

Table 17: Conformity Approvals

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Danfoss SV 1, SV 3 Data sheet

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