Pipeline ancillaries

Piston valves

Kv values

Screwed, Socket weld and butt weld

Size

1⁄2"

3⁄4"

1"

11⁄4"

11⁄2"

Kv

3

4.5

8.5

12

20.5

2"

32

For conversion:

Cv (UK) = Kv x 0.963

Cv (US) = Kv x 1.156

7

14

8

12

6

9

10

11

13

2

1

4

5

3

Materials

No.

Part

1

Body and Bonnet

2

3

Lower sealing rings

4

Upper sealing rings

5

Lantern bush

6

Piston

7

Handwheel

8

Handwheel nut

9

Stud bolt

10

Nut

11

Washer

12

Name-plate

13

Belleville washer

14

Blind nut

PV4

PV6

PV4

PV6

PV4

PV6

PV4

PV6

PV4

PV6

Material

Carbon steel

Stainless steel

Graphite laminate

Stainless steel

Graphite laminate

Stainless steel

Stainless steel

Stainless steel

Stainless steel

Stainless steel

Carbon steel

Carbon steel

Carbon steel

Stainless steel

Carbon steel

Stainless steel

Stainless steel

Stainless steel

Stainless steel

Carbon steel

EN

EN

EN

EN

ASTM A105

1.4401 / AISI 316

1.4057 / AISI 431

1.4401 / AISI 316

1.4401 / AISI 316

7.3.4

EN 1.4404 / AISI 316L

ASTM A193 B7

ASTM A193 GrB8M2

ASTM A194 2H

ASTM A193 GrB8M2

TI-P118-06 ST Issue 3

Page 3 of 4

PV4 and PV6 Piston Valves