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kyAlfa Laval Safety ValveSafety valves

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IntroductionThe Alfa Laval Safety Valve is a versatile hygienic spring-loaded reliefvalve that prevents pressure buildup in process tanks, vessels andequipment due to blocked discharge, thermal expansion, chemicalreactions, or a combination of these events.

ApplicationThis safety valve is ideal for use in the dairy, food, beverage,biotechnology, pharmaceutical and many other industries.

Benefits• Safe, reliable operation• Hygienic design• Prevents unsanitary leakage and overflow• Safeguards both personnel and equipment against accidents due

to overpressure• Optional manual or automated overwrite for valve cleaning

Standard designThe Alfa Laval Safety Valve comes in sizes from DN25 to DN100 with aspring-loaded set pressure range from 0.2 to 12 bar. The valve canbe operated either pneumatically or manually. It is delivered with PEDcertificate and complies with PED 2014/68/EU and EN 4126-1, fluidgroup II (non-hazardous fluids). It is available for pressure regulation ofboth liquids and gases. Please note that manual pressure regulation ofgases has a reduced pressure range.

Working principleThe Alfa Laval Safety Valve prevents inadmissible overpressures offluids in tanks, containers and plant sections. It is factory-configuredwith the specified set pressure that is greater than the operatingpressure. If the operating pressure rises above the set pressure, thevalve opens against the spring force to relieve pressure.

The valve should be installed in a vertical position for optimalperformance. If mounted in a horizontal position, the set pressure willbe somewhat lower than specified due to the lack of weight from thepiston. The highest effect is obtained using DN80 and DN100.

TECHNICAL DATA

TemperatureTemperature range: +5°C to +95 °CMax. sterilisation temperature, dry steam: 140 °C (Max 30 min)

*DN25 for gas applications is only available for set pressure up to 1.5 bar

PHYSICAL DATA

MaterialsProduct wetted parts: 1.4404 (316L)Other steel parts: 1.4301 (304)Seals: EPDMExternal finish: Ra 1.5-2.5 µmInternal finish: Ra 0.8 µmConnections: Liner/nut - male DIN 11851

Option:Inductive sensor for feedback is available for standard and pneumatic lifting - see instruction manual for detail.

Dimensions (mm)

2001-0024

L4L3

L1d4d2

d1d3

L2

2001-0025

L4L3

L1

d4d2

d1d3

L2

2001-0026

L4L3

L1d4d2

d1d3

L2

L5

2001-0027

L4L3

L1

d4d2

d1d3

L2

L5

Standard DN25 Standard DN40-DN100 Standard DN25 Standard DN40-DN100

with inductive sensor for feedback with inductive sensor for feedback

.

StandardSize d1 d2 d3 d4 L1 L2 L3 L4 KgDN25 26 32 Rd52x1/6 Rd58x1/6 82 72 253 50 6.8DN40 32 38 Rd65x1/6 Rd65x1/6 68 82 255 66 9.1DN50 38 50 Rd78x1/6 Rd78x1/6 70 93 301 66 1.3DN65 50 66 Rd95x1/6 Rd95x1/6 85 105 402 66 15.0DN80 66 81 Rd110x1/4 Rd110x1/4 100 115 407.5 66 22.0DN100 81 100 Rd130x1/4 Rd130x1/4 130 130 418 66 28.2

Standard with inductive sensor for feedbackSize d1 d2 d3 d4 L1 L2 L3 L4 L5 KgDN25 26 32 Rd52x1/6 Rd58x1/6 82 72 253 50 324 6.8DN40 32 38 Rd65x1/6 Rd65x1/6 68 82 255 66 338 9.1DN50 38 50 Rd78x1/6 Rd78x1/6 70 93 301 66 384 1.3DN65 50 66 Rd95x1/6 Rd95x1/6 85 105 402 66 484 15.0DN80 66 81 Rd110x1/4 Rd110x1/4 100 115 407.5 66 489 22.0DN100 81 100 Rd130x1/4 Rd130x1/4 130 130 418 66 501 28.2

Dimensions (mm)

2001-0020

L4L3

L1d4d2

d1d3

L2

2001-0021

L4L3

L1d4d2

d1d3

L2

2001-0022

L4L3

L1d4d2

d1d3

L2

L5

2001-0023

L4L3

L1

d4d2

d1d3

L2

L5

Manual lifting DN25 Manual lifting DN40-DN100 Pneumatic lifting DN25 Pneumatic lifting DN40-DN100

with inductive sensor for feedback with inductive sensor for feedback

Manual liftingSize d1 d2 d3 d4 L1 L2 L3 L4 KgDN25 26 32 Rd52x1/6 Rd58x1/6 82 72 253 141-182 7.5DN40 32 38 Rd65x1/6 Rd65x1/6 68 82 255 152-232 10.3DN50 38 50 Rd78x1/6 Rd78x1/6 70 93 301 154-234 15.5DN65 50 66 Rd95x1/6 Rd95x1/6 85 105 402 153-233 16.2DN80 66 81 Rd110x1/4 Rd110x1/4 100 115 407.5 152.5-232.5 23.2DN100 81 100 Rd130x1/4 Rd130x1/4 130 130 418 152-232 29.6

Pneumatic lifting with inductive sensor for feedbackSize d1 d2 d3 d4 L1 L2 L3 L4 L5 KgDN25 26 32 Rd52x1/6 Rd58x1/6 82 72 253 50 324 6.8DN40 32 38 Rd65x1/6 Rd65x1/6 68 82 255 66 338 9.1DN50 38 50 Rd78x1/6 Rd78x1/6 70 93 301 66 384 1.3DN65 50 66 Rd95x1/6 Rd95x1/6 85 105 402 66 484 15DN80 66 81 Rd110x1/4 Rd110x1/4 100 115 407.5 66 489 22DN100 81 100 Rd130x1/4 Rd130x1/4 130 130 418 66 501 28.2

Opening and closing characteristics for incompressible fluids (Liquid)

Max. operating pressure (Pover):10 % of set pressure or 0.1 bar, whichever is the greater.

Closing pressure (Pclose):Maximum 20% or 0.6 bar below set pressure, whicheveris the greater

Max. operating pressure (Pover)0.9

0.8

0.2

0 (1 atm)

Set pressure (Pset)

Closing pressure (Pclose)

2001

-005

7

P (bar)

(Example: Set pressure = 0.8 bar)

Opening and closing characteristics for compressible fluids (Gas)

Max. operating pressure (Pover):10 % of set pressure or 0.1 bar, whichever is the greater.

Closing pressure (Pclose):Maximum 15% or 0.3 bar below set pressure, whicheveris the greater

Max. operating pressure (Pover)0.9

0.8

0.5

0 (1 atm)

Set pressure (Pset)

Closing pressure (Pclose)

2001

-007

2

P (bar)

(Example: Set pressure = 0.8 bar)

Blow-off performance chart

DN25 set pressure: 0.2 - 12.0 bar for liquids (water 20 °C)Pressure range [bar]A = 0.5 - 1.5B = 1.6 - 2.5C = 2.6 - 4.5D = 4.6 - 7.0E = 7.1 - 12.0

2001

-006

0

0

5

10

15

20

25

30

35

40

45Flow rate [m�/h]

Set pressure (bar)0 1 2 3 4 5 6 7 8 9 10 11 12

A

B

E

D

C

DN 25 set pressure: 0.2 - 1.5 bar for gases (air 20 °C)Pressure range [bar]A = 0.2 - 1.5

0

250

500

750

1,000

1,250

1,500

1,750

2,000

0 1 2 3 4 5 6 7 8 9 10 11 12

A

2001

-006

1

Flow rate [m�/h]

Set pressure (bar)

Blow-off performance chart

DN 40 set pressure: 0.2 - 12.0 bar for liquids (water 20 °C)Pressure range [bar]A = 0.2 - 1.0B = 1.1 - 3.0C = 3.1 - 7.0D = 7.1 - 12.0

A

B

DC

2001

-006

2

0

5

10

15

20

25

30

35

40

45

50

55

0 1 2 3 4 5 6 7 8 9 10 11 12

60Flow rate [m�/h]

Set pressure (bar)

DN 40 set pressure: 0.2 - 12.0 bar for gases (air 20 °C)Pressure range [bar]A = 0.2 - 1.0B = 1.1 - 3.0C = 3.1 - 7.0

0

250

500

750

1,000

1,250

1,500

1,750

2,000

2,250

2,500

2,750

0 1 2 3 4 5 6 7 8 9 10 11 12

A

B

D

C

2001

-006

3Flow rate [m�/h]

Set pressure (bar)

D = 7.1 - 12.0

Blow-off performance chart

DN 50 set pressure: 0.3 - 12.0 bar for liquids (water 20 °C)Pressure range [bar]A = 0.3 - 0.9B = 1.0 - 1.7C = 1.8 - 2.9D = 3.0 - 6.0

0 1 2 3 4 5 6 7 8 9 10 11 120

10

20

30

40

50

60

70

80

90

100

110

A

B

E

DC

2001

-006

4

Flow rate [m�/h]

Set pressure (bar)

E = 6.1 - 12.0

DN50 set pressure: 0.3 - 12.0 bar for gases (air 20 °C)Pressure range [bar]A = 0.3 - 0.9B = 1.0 - 1.7C = 1.8 - 2.9D = 3.0 - 6.0E = 6.1 - 12.0

0 1 2 3 4 5 6 7 8 9 10 11 120

500

1,000

1,500

2,000

2,500

3,000

3,500

4,000

4,500

AB

E

D

C

2001

-006

5

Flow rate [m�/h]

Set pressure (bar)

DN65 set pressure: 0.4 - 9.0 bar for liquids (water 20 °C)Pressure range [bar]A = 0.4 - 1.5B = 1.5 - 3.0C = 3.1 - 7.0D = 7.1 - 9.0

0102030405060708090100110120130140150160170180

0 1 2 3 4 5 6 7 8 9

A

B

D

C

2001

-006

6

Flow rate [m�/h]

Set pressure (bar)

DN65 set pressure: 0.4 - 9.0 bar for gases (air 20 °C)Pressure range [bar]A = 0.4 - 1.5B = 1.6 - 3.0C = 3.1 - 7.0D = 7.1 - 9.0

0500

1,0001,5002,0002,5003,0003,5004,0004,5005,0005,5006,0006,5007,0007,500

0 1 2 3 4 5 6 7 8 9

A

B

D

C

2001

-006

7Flow rate [m�/h]

Set pressure (bar)

DN80 set pressure: 0.3 - 8.0 bar for liquids (water 20 °C)Pressure range [bar]A = 0.3 - 0.9B = 1.0 - 1.9C = 2.0 - 3.3D = 3.4 - 4.3E = 4.4 - 8.0

020406080

100120140160180200220240260280

0 1 2 3 4 5 6 7 87.56.55.54.53.52.51.50.5

A

B

D

C

2001

-006

8

E

Flow rate [m�/h]

Set pressure (bar)

DN80 set pressure: 0.3 - 8.0 bar for gases (air 20 °C)Pressure range [bar]A = 0.3 - 0.9B = 1.0 - 1.9C = 2.0 - 3.3D = 3.4 - 4.3E = 4.4 - 8.0

0500

1,0001,5002,0002,5003,0003,5004,0004,5005,0005,5006,0006,5007,0007,5008,0008,5009,000

0 1 2 3 4 5 6 7 87.56.55.54.53.52.51.50.5

A

B

D

C

2001

-006

9

E

Flow rate [m�/h]

Set pressure (bar)

DN100 set pressure: 0.3 - 3.2 bar for liquids (water 20 °C)Pressure range [bar]A = 0.3 - 1.1B = 1.2 - 1.8C = 1.9 - 3.2

0

20

40

60

80

100

120

140

160

180

200

220

0 1 2 32.51.50.5

A

B

C

2001

-007

0

Flow rate [m�/h]

Set pressure (bar)

DN100 set pressure: 0.3 - 3.2 bar for gases (air 20 °C)Pressure range [bar]A = 0.3 - 1.1B = 1.2 - 1.8C = 1.9 - 3.2

0

500

1,000

1,500

2,000

2,500

3,000

3,500

4,000

4,500

5,000

5,500

6,000

0 1 2 32.51.50.5

A

B

C

2001

-007

1Flow rate [m�/h]

Set pressure (bar)

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Alfa Laval reserves the right to change specifications without prior notification.

How to contact Alfa LavalContact details for all countriesare continually updated on our website.Please visit www.alfalaval.com toaccess the information direct.

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