Steam traps

Bimetallic

Dimensions/weights (approximate) in mm and kg

Screwed, butt weld and socket weld

Size

A

C

D

E

H

Weight

Spare parts

The spare parts available are shown in solid outline. Parts drawn

in broken line are not supplied as spares.

1⁄2"

130

102

3⁄4"

130

102

1"

130

102

H Withdrawal

distance

D

E

Flanged

Size

A1

C

DN15

210

102

DN20

230

102

DN25

230

102

DN40

260

102

138

138

138

24

108

5.4

24

108

5.4

24

108

5.4

Available spares

Element set

Complete with valve, valve seat

and valve seat gasket

Strainer screen (3 off)

Set of gaskets (packet of 3 of each)

Important note

2, 3, 6

4

6, 10

C

The earlier design of the SM45 incorporated 4 off long cover studs

and 8 off washers and nuts for assembling the body and cover.

The current design of the SM45 incorporates a threaded cover and

4 off shorter studs and 4 off washers and nuts.

How to order spares

Always order spares by using the description given in the column

headed 'Available spares' and state the size and type of steam trap.

Example: 1 - Element set for a DN25 Spirax Sarco SM45 bimetallic

steam trap.

A

A1

D

138

138

138

146

E

H

Weight

24

108

7.2

24

108

8.6

24

108

9.5

30

114

13.6

11

2

2

3

3

5

4

6

6

Safety information, installation and maintenance

For full details see the Installation and Maintenance Instructions

(IM-P025-02) supplied with the product.

Installation note:

The SM45 is designed for installation with the element in a horizontal

plane with the cover at the top. When welding the the trap into the

line there is no need to remove the element providing that welding

is done by the electric arc method.

Disposal

The product is recyclable. No ecological hazard is anticipated with

disposal of this product providing care is taken.

How to order

Example: 1 off Spirax Sarco 1⁄2" SM45 bimetallic steam trap having

screwed BSP connections.

10

11

11

Recommended tightening torques

Item

5

11

10

or

mm

27 A/F

19 A/F

M12

N m

120 - 132

110 - 120

TI-P025-01 ST Issue 9

SM45 Bimetallic Steam Trap

Page 4 of 4

5.3.16

E

l

e

m

e

n

t

s

e

t

1

⁄

2

"

D

N

1

5

E

l

e

m

e

n

t

s

e

t

3

⁄

4

"

-

1

1

⁄

2

"

,

D

N

2

0

-

D

N

4

0