Herberts Industrieglas
Gewerbeschulstr. 72
D-42289 Wuppertal

Tel.: +49 202 590064
Fax: +49 202 597837
info(at)metaglas.com

Metaglas Sight Glass Type 61.NPT - Hexagon Head

Threaded Sightglass – NPT-Thread

Metaglas Threaded Sightglass with hexagonal head

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For:

Female connection with NPT or NPTF thread

Advantages:

Very compact
High pressure resistance
Simple assembly
Long working life

Operating conditions:

Pressure: 50 bar - higher pressure rating on request
Temperature: see table

Material certificates

Certificate of conformity to EN 10204-3.1B

Technical data:

Manufactured and tested to:

Derective for pressure equipment 97/23/EG 02/98, Module H (DIN/EN/ISO 9001)
AD 2000 Standards W0/TRD 100
Sight glass fused to metal conforming to DIN 7079
Materials to VdTÜV specifications and the DIN/EN designated standards

Materials:

Ring material: Carbon steel (1.0570), Stainless Steel (1.4462 or 1.4523)
Glass: Borosilicate glass to DIN 7080 or Sodalime glass

Ring material	Operating temp.
Ring material	AR-Glas	Borosilicate
1.4462	-30°C to 50°C	-30°C to 280°C
2.4602	-60°C to 150°C	-60°C to 300°C
2.4605	-60°C to 150°C	-60°C to 300°C
2.4610	-60°C to 150°C	-60°C to 300°C

d2 Thread	SW	d1	d4	l	l1
¼“ NPT	21	8	9	15	10
³/₈“ NPT	24	10	12	15	10
½“ NPT	27	14	16	25	15
¾“ NPT	36	18	20	26	16
1“ NPT	41	22	23	28	18
1 ¼“ NPT	50	25	30	30	20
1 ½“ NPT	55	30	36	32	22
2“ NPT	70	37	44	35	25
3“ NPT	100	55	60	38	28