Pipeline ancillaries Sight glasses
10
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 window(s), particularly where caustic alkali and hydrofluoric acid are present. It is recommended that the sight glass is periodically checked for thinning of the window(s). If there is evidence of thinning or erosion damage then the window(s) should be replaced immediately. Always wear eye protection when viewing the contents of the sight glass. Installation and maintenance note: Sight glasses should have stop valves fitted on both the inlet and outlet. It is imperative that the upstream stop valve is closed first in order to prevent overpressurisation. Sight glasses can be fitted in either a horizontal or vertical line on the outlet side of a steam trap. Where the trap is a blast discharge type e.g. thermodynamic, the sight glass must be fitted at least 1 m (3.28 ft) from the trap. This is to ensure that the glass is not subjected to thermal shock or pressure. Reasonable steps should be taken to protect personnel from injury in the unlikely event that the glass breaks. Ensure access is available for maintenance purposes. Disposal The product is recyclable. No ecological hazard is anticipated with disposal of this product providing due care is taken.
How to order Example: 1 off Spirax Sarco 1" BSP double window sight glass with brass body and removable toughened soda lime glass.
Spare parts The spare parts available are shown in heavy outline. Parts drawn in a grey line are not supplied as spares. Available spares Set of windows and gaskets 3, 4, 5 Set of gaskets
4, 5
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 sight glass. Example: 1 off Set of windows and gaskets for a 1" Spirax Sarco double window sight glass.
2
2
4 3 5
4 3 5
Single window
Double window
10.8 5
5 3 4
Recommended tightening torques
or mm
Item Part
N m
ft lbf
2
Bezel
60 - 65
44 - 48
TI-P022-05 CMGT Issue 8
Page 5 of 5
Single Window and Double Window Sight Glasses
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