Control valves

Safety valves

Pressure/temperature limits

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Steam

saturation

curve

Body design conditions

Set pressure range

Temperature

Performance data

Pressure bar g

The product must not be used in this region.

DN25 and DN40

DN50

DN65 and DN80

DN100

Maximum

Maximum

Maximum

Maximum

Minimum

Minimum

Minimum

Minimum

Minimum

PN16

16 bar g

0.1 bar g

15 bar g

0.2 bar g

10.34 bar g

0.1 bar g

8.2 bar g

0.1 bar g

150°C

-45°C

10%

10%

10%

20%

0.70

0.45

10% of set pressure

24 bar g

With EPDM soft seat

Maximum

All versions

Overpressure

Blowdown limits

Steam, gas

Maximum

Liquid

Maximum

Steam, gas

Maximum

Liquids

Maximum

Derated coefficient of

Steam, gas

discharge values d

Liquid

Maximum permitted backpressure

Designed for a maximum inlet cold hydraulic test pressure of:

Table 1 - SVL488 flow capacity for dry saturated steam in kilogrammes per hour (kg / h)

(calculated at 10% overpressure. In accordance with EN ISO 4126)

Valve size DN in/out

DN25/40

DN40/65

DN50/80

DN65/100

DN80/125

DN100/150

Flow diameter (mm)

23

37

46

60

74

92

Flow area (mm2)

416

1075

1 662

2 827

4301

6 648

Set pressure (bar g)

Dry saturated steam, kg/h

0.2

151

390

604

1027

1562

2415

0.5

214

554

857

1457

2217

3427

1.0

319

825

1275

2169

3 300

5100

2.0

504

1 303

2 015

3 427

5213

8 058

3.0

678

1751

2 707

4 605

7 006

10829

4.0

843

2177

3 366

5 726

8 711

13465

TI-P315-03 CH Issue 7

SVL488 Stainless Steel Safety Valve for Clean Service Applications

Page 3 of 5

4.7.44

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