Pipeline ancillaries

Sight glasses

Dimensions/weights (approximate) in mm and kg

Spare parts

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

in broken line are not supplied as spares .

Size

A

1⁄2"

41

3⁄4"

41

1"

41

B

Weight

78.0

0.42

89.5

0.53

98.0

0.75

A

Available spares

Sight glass assembly

How to order spares

3 (2 off), 4

B

Always order spares by using the description given in the column

headed 'Available spares'. Since the sight glass assembly is the

same for all three sizes, it will always be:-

Example: 1 off Sight glass assembly for a Spirax Sarco SG13

sight glass.

Safety information, installation and maintenance

For full details see the Installation and Maintenance Instructions

(IM-S32-04) supplied with the product.

Warning:

Under certain conditions corrosive elements in condensate can

affect the inside face of the sight tube, particularly where caustic

alkali and hydrofluoric acid are present. It is recommended that the

sight glass is periodically checked for thinning of the sight tube. If

there is evidence of thinning or erosion damage then the sight tube

should be replaced immediately. Always wear eye protection when

viewing the contents of the sight glass.

Reasonable steps should be taken to protect personnel from injury

in the unlikely event that the sight tube breaks.

Installation note:

The tapered thread of the sight glass is screwed directly into the

discharge side of the steam trap. Although the sight glass can be

fitted in any plane, installation and flow direction will be dictated by

the design and operation of the steam trap.

Disposal

The product is recyclable. No ecological hazard is anticipated with

disposal of this product providing due care is taken. However if the

recycling process involves a temperature approaching 315°C caution

is advised regarding decomposition of the virgin PTFE / flurocarbon

sight tube gasket.

How to order

Example: 1 off Spirax Sarco 1⁄2" SG13 sight glass having screwed

BSP connections.

3

4

3

Recommended tightening torques

Item

Size

1⁄2" - DN15

2

3⁄4"-DN20

1" - DN25

2

35 - 40

35-40

35 - 40

32 A/F

36 A/F

46 A/F

Nm

SG13 Brass Sight Glass

TI-P130-11 ST Issue 5

7.9.6