UK Product Handbook 2026 - Volume 2

Pipeline ancillaries Sight glasses

10

Spare parts The spare parts available are shown in solid outline. Parts drawn in a grey line are not supplied as spares.

Available spares Set of windows and gaskets

5 *

3, 4

4 6 8

Set of gaskets

Visual flow indicator flap

Mica glass protectors

4

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 the sight glass. Example: 1 off Set of windows and gaskets for a Spirax Sarco DN20 SGC40 sight glass.

3

8

4

6

4

8

3

4

10.8 23

Table 1 Recommended tightening torques

5 *

or mm

Item

Size

Quantity

N m (lbf ft)

DN15 - DN20

8

17 A/F M10 x 35 12

8.8

DN25 - DN32 Flanged

8

19 A/F M12 x 50 28 20.6

* Item 5 is not an available spare.

DN32 Screwed and socket weld, DN40 - DN50

5

8

19 A/F M12 x 60 38 28.0

DN65 - DN100

8

23 A/F M16 x 85 132 97.3

TI-P130-28 CMGT Issue 14

Page 7 of 7

SGC40 and SGS40 Sight Glasses

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