TLV SG880 compact sight glass for optical flow control. Designed for visual inspection of filling and flow in pipelines, it enables reliable monitoring of the function and performance of individual devices as well as entire systems.

Features

• Approved according to standard DIN 3237-1.
• With in-built embedded entry.
• Heat resistant borosilicate glass with mica shield on both sides according to DIN 7080.
• Face-to-face length according to DIN EN 558 FTF1.
• Light, compact construction.

Specifications

Model	SG880-16	SG880-40
Connection	Flanged PN16 DIN EN 1092-2	Flanged PN40 DIN EN 1092-2
Body Material	Cast Iron EN-GJL-250	Cast Steel GP240GH / Stainless Steel 1.4408
Size	DN15 to DN50*	DN15 to DN50*
Operating Temperature Range (°C)	-10 to 280	-10 to 280
Max. Operating Pressure (barg) PMO	16	40

• Other sizes on request.
• 1 bar = 0.1 MPa

Pressure Shell Conditions (Not Operating Conditions):

• Maximum Allowable Pressure (barg) PMA: 16 or 40
• Maximum Allowable Temperature (°C) TMA: 280

WARNING

To avoid abnormal operation, accidents or serious injury, DO NOT use this product outside of the specification range. Local regulations may restrict the use of this product to below the conditions quoted.

Materials

No.	Description	Material	DIN/EN
①	Body (SG880-16)	Cast Iron EN-GJL-250	0.6025
	Body (SG880-40)	Cast Steel GP240GH	1.0619
	Body (SG880-40)*	Stainless Steel 1.4408 / 1.4301	1.4408 / 1.4301
②	Cover (SG880-16)	Cast Iron EN-GJL-250	0.6025
	Cover (SG880-40)	Cast Steel GP240GH	1.0619
	Cover (SG880-40)*	Stainless Steel 1.4408 / 1.4301	1.4408 / 1.4301
③	Screw	4.6 / 5.6 gal. or A4-70*	-
④	Nut	Steel	-
⑤	Glass	Borosilicate Glass with Mica Shield DIN 7080	-
⑥	Gasket	Graphite	-

• only for SG880-40 stainless steel

Dimensions

SG880 Flanged (mm)

DN	D	BL	d1	Glass plate d2	Glass plate S (PN16)	Glass plate S (PN40)
15	95	130	32	45	10	10
20	105	150	32	45	10	10
25	115	160	48	63	10	15
32	140	180	48	63	10	15
40	150	200	65	80	12	20
50	165	230	80	100	15	25

Max. Operating Pressure / Temperature Relation

Temperature (°C)	120	150	200	250	280
PN16 (barg)	16.0	15.0	14.0	13.0	11.0
PN40 (barg)	40.0	37.0	35.0	32.0	28.0