Fluid Sight Glasses EN 541.6

Original design
code: HFTX-EX

Product Family ATEX

ATEX standard parts have been developed for explosion hazard conditions in hydraulics or gear construction. Every product includes a documentation showing the underlying European explosion protection directive (ATEX).

especially for explosion hazard zones

Show all ATEX products

Operating Instruction EN 541.6 Plastic Characteristics

Product description

Fluid sight glasses EN 541.6 are suitable for use in potentially explosive atmospheres. They comply with the European explosion protection directive (ATEX) 2014/34/EU.

A detailed operating instruction is available and included with every fluid sight glass.

These fluid sight glasses made of polyamide plastic have a high mechanical strength. Therefore, they can be produced with thinner walls with a large viewing window.

Specification

Body
Plastic, Polyamid (PA 6-T)

Crystal clear
High mechanical strength
Solvent resistant,
but not suitable for alcohol

Reflector
Aluminum
Anodized finish, natural color

Seal
Acrylonitrile butadiene rubber (NBR)

Operating temperature
-4 °F to +176 °F (-20 °C to +80 °C)

RoHS

Accessory

Thin Hex Nuts GN 7430
Weld Bushings GN 7490 (Steel)

Part Number	d₁	d₂ Fine thread	Pipe thread	d₃	l₁	l₂	s	Recommended tightening torque in Nm

541.6-11-M16X1.5-A	0.43	M 16 x 1.5	-	0.87	0.31	0.28	0.75	2...3
541.6-14-M20X1.5-A	0.55	M 20 x 1.5	-	1.02	0.37	0.31	0.87	4...6
541.6-18-M25X1.5-A	0.71	M 25 x 1.5	-	1.24	0.31	0.35	1.06	6...8
541.6-18-M26X1.5-A	0.71	M 26 x 1.5	-	1.24	0.51	0.35	1.06	6...8
541.6-20-M27X1.5-A	0.79	M 27 x 1.5	-	1.24	0.35	0.35	1.06	6...8
541.6-22-M30X1.5-A	0.87	M 30 x 1.5	-	1.38	0.35	0.39	1.18	6...8
541.6-25-M35X1.5-A	0.98	M 35 x 1.5	-	1.57	0.43	0.39	1.34	8...10
541.6-30-M40X1.5-A	1.18	M 40 x 1.5	-	1.85	0.45	0.51	1.59	8...10
541.6-11-G3/8-A	0.43	-	G 3/8	0.87	0.30	0.28	0.75	3...5
541.6-14-G1/2-A	0.55	-	G 1/2	1.02	0.41	0.31	0.87	4...6
541.6-20-G3/4-A	0.79	-	G 3/4	1.24	0.41	0.35	1.06	6...8
541.6-25-G1-A	0.98	-	G 1	1.57	0.43	0.39	1.34	8...10
541.6-30-G11/4-A	1.18	-	G 1 1/4	1.85	0.45	0.51	1.59	8...10

Part Number

d₁

d₂
Fine thread

Pipe thread

d₃

l₁

l₂

Recommended
tightening torque
in Nm

541.6-11-M16X1.5-A

0.43

M 16 x 1.5

0.87

0.31

0.28

0.75

2...3

541.6-14-M20X1.5-A

0.55

M 20 x 1.5

1.02

0.37

0.31

0.87

4...6

541.6-18-M25X1.5-A

0.71

M 25 x 1.5

1.24

0.31

0.35

1.06

6...8

541.6-18-M26X1.5-A

0.71

M 26 x 1.5

1.24

0.51

0.35

1.06

6...8

541.6-20-M27X1.5-A

0.79

M 27 x 1.5

1.24

0.35

1.06

6...8

541.6-22-M30X1.5-A

0.87

M 30 x 1.5

1.38

0.35

0.39

1.18

6...8

541.6-25-M35X1.5-A

0.98

M 35 x 1.5

1.57

0.43

0.39

1.34

8...10

541.6-30-M40X1.5-A

1.18

M 40 x 1.5

1.85

0.45

0.51

1.59

8...10

541.6-11-G3/8-A

0.43

G 3/8

0.87

0.30

0.28

0.75

3...5

541.6-14-G1/2-A

0.55

G 1/2

1.02

0.41

0.31

0.87

4...6

541.6-20-G3/4-A

0.79

G 3/4

1.24

0.41

0.35

1.06

6...8

541.6-25-G1-A

0.98

G 1

1.57

0.43

0.39

1.34

8...10

541.6-30-G11/4-A

1.18

G 1 1/4

1.85

0.45

0.51

1.59

8...10

d₁	d₂ Fine thread	Pipe thread	d₃	l₁	l₂	s	Recommended tightening torque in Nm

0.43	M 16 x 1.5	-	0.87	0.31	0.28	0.75	2...3
0.55	M 20 x 1.5	-	1.02	0.37	0.31	0.87	4...6
0.71	M 25 x 1.5	-	1.24	0.31	0.35	1.06	6...8
0.71	M 26 x 1.5	-	1.24	0.51	0.35	1.06	6...8
0.79	M 27 x 1.5	-	1.24	0.35	0.35	1.06	6...8
0.87	M 30 x 1.5	-	1.38	0.35	0.39	1.18	6...8
0.98	M 35 x 1.5	-	1.57	0.43	0.39	1.34	8...10
1.18	M 40 x 1.5	-	1.85	0.45	0.51	1.59	8...10
-	-	-	-	-	-	-	-
0.43	-	G 3/8	0.87	0.30	0.28	0.75	3...5
0.55	-	G 1/2	1.02	0.41	0.31	0.87	4...6
0.79	-	G 3/4	1.24	0.41	0.35	1.06	6...8
0.98	-	G 1	1.57	0.43	0.39	1.34	8...10
1.18	-	G 1 1/4	1.85	0.45	0.51	1.59	8...10

d₁

d₂
Fine thread

Pipe thread

d₃

l₁

l₂

Recommended
tightening torque
in Nm

0.43

M 16 x 1.5

0.87

0.31

0.28

0.75

2...3

0.55

M 20 x 1.5

1.02

0.37

0.31

0.87

4...6

0.71

M 25 x 1.5

1.24

0.31

0.35

1.06

6...8

0.71

M 26 x 1.5

1.24

0.51

0.35

1.06

6...8

0.79

M 27 x 1.5

1.24

0.35

1.06

6...8

0.87

M 30 x 1.5

1.38

0.35

0.39

1.18

6...8

0.98

M 35 x 1.5

1.57

0.43

0.39

1.34

8...10

1.18

M 40 x 1.5

1.85

0.45

0.51

1.59

8...10

0.43

G 3/8

0.87

0.30

0.28

0.75

3...5

0.55

G 1/2

1.02

0.41

0.31

0.87

4...6

0.79

G 3/4

1.24

0.41

0.35

1.06

6...8

0.98

G 1

1.57

0.43

0.39

1.34

8...10

1.18

G 1 1/4

1.85

0.45

0.51

1.59

8...10

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EN 541.6 Fluid Sight Glasses Crystal Clear Plastic, ATEX Explosion Protective

Product Family ATEX

Product description

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