Control valves

Control valves

Page 5 of 17

Pressure / temperature limits

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Pressure bar g

The product must not be used in this region.

Viton (V) stem seals must be selected for use in this region.

Note: the EPDM (E) stem seals are limited to 150°C

Steam

saturation

curve

Body design conditions

Maximum design pressure

Maximum design temperature

Minimum design temperature

Maximum operating temperature

Minimum operating temperature

Note: For lower operating temperatures consult Spirax Sarco.

Maximum differential pressure

Designed for a maximum cold hydraulic test pressure of:

EPDM (E)

Viton (V)

Kvs by valve size and

PN16

16 bar g @ 120°C

200°C @ 14 bar g

-20°C

150°C

170°C

-10°C

See pages 6 to 11

24 bar g

Kv values (SA and SH models)

Valve size

Travel

Standard

Reduction 1

Reduction 2

Reduction 3

4

-

-

-

6.3

4

-

-

10

6.3

4

-

20 mm

16

10

6.3

4

25

16

10

6.3

36

25

16

10

63

36

25

16

100

63

36

25

Valve size

Travel

trim reduction

Flow characteristic

Equal percentage

and linear

Kv values (SQ model)

Flow characteristic

Linear

DN15

DN15

DN20

DN20

DN25

DN32

DN40

DN50

DN65

DN80

30 mm

DN80

30 mm

DN100

160

100

63

36

DN100

160

"

2.5

Kvs by valve size and trim reduction

DN25

DN32

DN40

20 mm

DN50

DN65

Micro-flow trim for all valves < = DN25 (SA and SH only)

Micro-flow trim

Linear characteristic

Travel

Trim size

Kvs

4

0.4

"

10

20 mm

Standard

6.3

0.63

"

16

25

1⁄4"

36

63

1⁄4"

100

1.0

1.6

Cv(UK) = Cv (US) x 0.833

1. Lower Kv values are available to special order.

For conversion: Kv = Cv (US) x 0.855

Notes:

2. Micro-flow and Equal percentage trim are not available for the SQ 3-port control valve.

STERI-TROL Clean Service 'S' series Two-port and Three-port

Control Valves DN15 (1⁄2") to DN100 (4")

TI-P183-02 CH Issue 3

Page 5 of 17

4.1.82

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