Type 2921

12 | 15

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5.

Performance specifications

5.1. Fluidic data

Overview of fluidic data for flow below seat (for liquids, steam and gases)

Note:

• K

V value [m

3

/h]: measurement with water according to DIN EN 60534 - 2 - 4

• Seat leakage leakage rate A according to DIN EN 12266 - 1

• See “7.2. Bürkert product filter” on page 15

Nominal diameter (pipe)

Handwheel

diameter Ø

Operating pressure max. CF A

K

V value

Seat seal

PTFE

PEEK

DN

NPS

[mm]

[bar(g)]

[bar(g)]

[m3/h]

10

¾

45 (S)

25

25

4.7

15

½

45 (S)

25

25

4.7

20

¾

45 (S)

25

25

8.1

25

1

45 (S)

25

25

13.0

32

1 ¼

45 (S)

25

25

20

40

1 ½

451.) (S). 110 (M)

25

25

31

50

2

110 (M)

25 (20 2.))

23 (20 2.))

45

65

2 ½

160 (L)

24 (15 2.))

14

73

80

3

160 (L)

16

10

110

100

4

160 (L)

10

6

165

1.) At an operating pressure of less than 16 bar

2.) According to the Pressure Equipment Directive 97/23/EC for compressible fluids of Group 1 (hazardous gases and vapours according to Article 3 No. 1.3 letter a first dash)