Materials

Item numbers 22-42

Boiler house

Bottom blowdown systems

No. Part

22 Bolt

23 Diaphragm plate

24 Spindle

25 Lever stem

26 Screw

27 Seal

28 Spring

29 Spring guide

30 Connector

31 Lever

32 Axis

33 Roller

34 Spring graphite

35 Elastic ring

36 Elastic ring

37 Washer

38 O'ring

39 Spacer

40 Washer

41 Plasticprotection

42 Screw

Material

Carbon Steel

Carbon Steel

Stainless Steel

Stainless Steel

Carbon Steel

Polyurethane

Spring Steel

Stainless Steel

Stainless Steel

SGIron

Stainless Steel

Stainless Steel

Spring Steel

Carbon Steel

Carbon Steel

Carbon Steel

Viton

Carbon Steel

Carbon Steel

Plastic

Stainless Steel

28

22

39

38

37

2.11.4

27

26

34

24

29

30

Kvs values

Valve size

Seat diameter (mm)

Kvs values

25

For conversion: Cv (UK) = Kv x 0.963 Cv (US) = Kv x 1.156

31

32 - 35

33-36

DN15 BBV_3 PN / M shown

TI-P405-51 AB Issue 1

BBV Automatic or Manually Actuated Boiler Blowdown Valves DN15 to DN65

Page 3 of 17

DN15 DN20 DN25

8

10

12

1.6

2.5

4.0

23

40

DN32 DN40

12

16

4.0

6.3

DN50 DN65

20

25

10

16