Pipeline ancillaries Sight glasses
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Safety information, installation and maintenance For full details see the Installation and Maintenance Instructions (IM-P130-29) supplied with the product. Warning:
Under certain conditions corrosive elements in the flow media can affect the inside face of the window, particularly where caustic alkali and hydrofluoric acid are present. Mica glass protectors must be used to protect the glass when the unit is used on steam applications or when the ph is higher than ph9 or when the temperature is above 150 °C with a ph greater than ph7. Regular inspection of the glass to check for thinning of the window must be undertaken based on an assessment of your system. If there is evidence of thinning or erosion damage then the window 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 window breaks. Installation and maintenance note: Apply the appropriate grease to SGS40 stainless steel connections and bolting to avoid cold welding. 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 must be fitted on the outlet side of a steam trap in either a horizontal or vertical pipeline in accordance with the flow arrow on the body. Warning: when the optional visual flow indicator flap is requested for horizontal flow applications the hinge must be placed uppermost otherwise it will not work for the purpose intended. Where the trap is a blast discharge type e.g. thermodynamic, the sight glass must be fitted at least 1 m from the trap. This is to ensure that the glass is not subjected to thermal shock or pressure. 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 DN20 SGS40M sight glass having a stainless steel body, removable toughened glass windows and flanged EN 1092 PN40 connections. The unit must be supplied complete with the optional 'visual flow indicator flap' and the 'Mica glass protectors'.
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TI-P130-28 CMGT Issue 14
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SGC40 and SGS40 Sight Glasses
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