SGC40 and SGS40

Sight Glasses

Description

The SGC40 cast carbon steel and SGS40 stainless steel are double window sight glasses having screwed, sanitary clamp, socket weld and flanged connections.

SGC40 and SGS40 Sight Glasses

Standards
These products fully comply with the requirements of the European Pressure Equipment Directive 2014/68/EU and carry the mark when so required.

Certification
These products are available with a manufacturer’s Typical Test Report and if specified certification to EN 10204 3.1.
Note: All certification/inspection requirements must be stated at the time of order placement.

Optional extras

Visual flow indicator flap to check the flow of the liquid in the pipeline.
Spring: The visual flow indicator flap can be spring loaded for applications on vertical lines or where there is high flowrates.
Mica glass protectors for severe applications – When these have been specified the nomenclature becomes SGC40M and SGS40M.
Glass filled PTFE gasket.

Please see table below to identify when Mica glass protectors are to be used.

Application	Glass choice to be used
Steam or > pH9	Mica glass protectors and Borosilicate glass windows
>150 °C and > pH7	Mica glass protectors and Borosilicate glass windows
<150 °C and < pH7	Borosilicate glass windows only

Sizes and pipe connections

½”, ¾”, 1″, 1¼”, 1½” and 2″ Screwed BSP T Rp (ISO 7-1), NPT and Socket weld.
DN15, DN20, DN25, DN40 and DN50 Sanitary clamp connections to ASME BPE.
DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80 and DN100.
Flanged EN 1092 PN40, ASME Class 150 and Class 300, JIS/KS 10 and JIS/KS 20.
Flanged versions have face-to-face dimensions in accordance with EN 558 Series 1.

Materials

SGC40 and SGS40 Sight Glasses

No.	Part			Material
1	Body*		SGC40	Carbon steel	EN 10213 1.0619+N/ASTM A216 WCB
			SGS40	Stainless steel	EN 10213 1.4308/ASTM A351-CF8
*The materials shown for the body are for all available connections and for the DN32 to DN100 integrally flanged units. Please note that flanges are welded onto the body of the smaller DN15 to DN25 units – See flange material below:
*Flange material for sizes DN15 to DN25			SGC40	Carbon steel	C22.8 according EN 10222-2/A105N according ASTM A105
			SGS40	Stainless steel	1.4571 according EN 10222-5/316Ti according ASTM A182
2	Cover	SGC40	DN15 to DN50	Carbon steel	C22.8 according EN 10222-2/A105N according ASTM A105
			DN65 to DN100	Carbon steel	EN 10213 1.0619+N/ASTM A216 WCB
		SGS40		Stainless steel	EN 10213 1.4308/ASTM A351-CF8
3	Window			Borosilicate glass	DIN 7080
4	Gaskets			Reinforced exfoliated graphite (standard) or PTFE Glass filled (optional)
5	Cover bolts			Stainless steel	EN ISO 3506-1 A2-70