NPT Sight Window: Glass Fused into 316 Stainless Housing
 
  • Housing Material: 316 Stainless
  • Window Material: glass (borosilicate available with Duplex stainless housing)
  • Temperature operating range: 0 Kelvin to 400C
  • Pressure safety factor: Minimum 4x
  • Thermal shock resistance: Excellent
  • Impact resistance: Excellent
  • Leak Rate: Equivalent to the permeation rate through glass (~zero)
  • Chemical resistance: Excellent for solvents, must be tested for specific acids and corrosives

Rayotek’s 316 stainless steel/fused glass NPT Sight Windows are rugged, thermal and corrosion resistant Sight Windows. Rayotek’s NPT Sight Glasses are the right choice for high vacuum to ultra high pressure in applications such as pumps, engines, furnaces, compressors, hydraulic systems and boilers.  Rayotek NPT fused glass Sight Windows are so robust that even when cracked from mechanical damage they continue to seal and protect against release of pressure.

Click on Part Number for Drawings, Purchase & Volume Pricing.

NPT PIPE SIZE
(in)
CLEAR APERTURE
(in)
CLEAR APERTURE (mm)
MAX PRESSURE (psi / bar)
EXTERNAL INTERNAL VACUUM
HEX SIZE
(in)
HEX SIZE (mm)
PART NUMBER
1/4  NPT
0.39
9.9
1000 / 69
EP, IP, VAC
0.69
17.5
 3/8  NPT
0.48
12.2
1000 / 69
EP, IP, VAC
0.81
20.6
1/2 NPT
0.59
15.0
1000 / 69
EP, IP, VAC
1.00
25.4
 3/4  NPT
0.81
20.6
1000 / 69
EP, IP, VAC
1.38
35.1
1  NPT
0.96
24.4
1000 / 69
EP, IP, VAC
1.63
41.4
1-1/4  NPT
1.32
33.5
1000 / 69
EP, IP, VAC
2.25
57.2
1-1/2  NPT
1.47
37.3
1000 / 69
EP, IP, VAC
2.50
63.5
2  NPT
1.76
44.7
1000 / 69
EP, IP, VAC
3.00
76.2
2-1/2  NPT
2.21
56.1
1000 / 69
EP, IP, VAC
3.75
95.3
3  NPT
2.50
63.5
1000 / 69
EP, IP, VAC
4.25
108.0
4  NPT
3.09
78.5
1000 / 69
EP, IP, VAC
5.25
133.4
 
 
 
 
 
 
 
 
 1/4  NPT
0.34
8.6
4000 / 276
EP, IP, VAC
0.69
17.5
 3/8  NPT
0.43
10.9
4000 / 276
EP, IP, VAC
0.81
20.6
 1/2  NPT
0.46
11.7
4000 / 276
EP, IP, VAC
1.00
25.4
 3/4  NPT
0.55
14.0
4000 / 276
EP, IP, VAC
1.38
35.1
1  NPT
0.76
19.3
4000 / 276
EP, IP, VAC
1.63
41.4
1-1/4  NPT
0.94
23.9
4000 / 276
EP, IP, VAC
2.00
50.8
1-1/2  NPT
1.10
27.9
4000 / 276
EP, IP, VAC
2.25
57.2
2  NPT
1.42
36.1
4000 / 276
EP, IP, VAC
2.75
69.9
2-1/2 NPT
1.88
47.8
4000 / 276
EP, IP, VAC
3.50
88.9
3 NPT
2.13
54.1
4000 / 276
EP, IP, VAC
4.00
101.6
4 NPT
2.89
73.4
4000 / 276
EP, IP, VAC
4.75
120.7


Contact Rayotek Sales for higher volume price discounts, BSPT option or UHP (10,000PSI) fused glass Sight Windows

Back to NPT (and BSPT) Configuration Page.