4.7.37

12

13

11

27

40

9

21

17

22

2

1

Materials

No.

Part

1

Body

2

Seat

3

Bonnet

4

Cap

5

Disc

F to H orifice

J to R orifice

F to H orifice

J to R orifice

Material

Carbon steel

Stainless steel

Stainless steel

Carbon steel

Cast iron

Stainless steel

Stainless steel

Chrome-vanadium alloy steel

Stainless steel

Stainless steel

Stainless steel

Stainless steel

Steel

Steel

Steel

Stainless steel

Carbon steel

Carbon steel

Carbon steel

Grey iron

Carbon steel

Stainless steel

Stainless steel

Stainless steel

Carbon steel

Carbon steel

Carbon steel

Carbon steel

Carbon steel

ASME SA 216 Gr. WCB

ASTM A479 304

ASTM A351 Grade CF8

ASME SA 216 Gr. WCB

ASTM A126 Class B

ASTM A479 304

ASTM A217 CA15

ASTM A351 Grade CF8

ASTM A351 Grade CF8

ASTM A479 Type 410

ASTM A479 Type 410

ASTM A105

ASTM A193 Grade B7

ASTM A194 Grade 2H

ASTM A479 Type 410

6

Spring

7

Upper adjusting

8

Lower adjusting

9

Stem (lower)

10

Stem (upper)

11

Spring washers

12

Bonnet stud

13

Bonnet nut

14

Adjusting screw

15

Adjusting screw

16

Release ring

17

Lock-nuts (2 off)

18

Lever

20

Cap set screw

21

Upper adjusting ring pin

22

Lower adjusting ring pin

23

Disc ball

24

Pin washer

25

Lever pin

26

Lock-nut

27

Guide plate

40

Stem pin

TI-S13-30 CH Issue 13

SV74 Carbon Steel Safety Valve

Page 2 of 5

26

16

18

4

24, 25

14

15

20

6

3

10

7

5

23

8

ring

ring

(2 off)

nut

Control valves

Safety valves