Type 2921

13 | 15

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5.2. Operating limits

Operating limits for medium temperature and operating pressure

The operating range of Bürkert process valves is in addition to the maximum operating pressures limited by the nominal pressure according

to the relevant standard.

Operating limits for PN25 according to DIN EN 12516-1

Operating limits for Class 150 according to ASME B16.34

Operating limits for flange 10K according to JIS B 2220

Saturated steam curve for water

-40

0

20

40

60

80

100

120

140

160

200

220

0

5

10

15

20

25

Application limits of operating pressure and medium pressure

Operating pressure [bar(g)]

Low temperature version required

High temperature version required

-10

185

14

19

Satur

ated

steam

cur

ve

Standard

-20

230

Operating limits for optional versions

High temperature version

By adapting the spindle sealing this version is suitable for applications with steam, neutral gases and other heat transfer mediums up to

+ 230 °C.

Water version

For applications with water up to + 200 °C; a special configuration of the spindle seal increases the lifetime significantly.It is recommended

for all water applications.

Drinking water version

The materials comply with the assessment principles (UBA) for materials in contact with drinking water up to + 85 °C.

Low temperature version

Suitable for minimum medium temperatures down to - 40 °C