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Sight Glass Window 

 

GrandMfg® liqid or oil sight glass window

GrandMfg® sight glasses allowed directly to see the liquid or oil within industrial pipes systems,tanks, and vessels etc. These sights have a glass window. Screw them into threaded holes on tanks, gear cases,gear unit, bearing housings, blower,pump and mixers to see inside liquid level. 

Custom safety sight glasses can be designed to meet your exact specifications with different thread size and thread type. No thread for press fitting or welding is also no problem.

Application:Pump,Receivers,Tanks,Gearbox,Speed reducer,Worm gearbox, helical gear boxes, variable speed motor, automotive Worm gearboxes,Compressor,blower,Gear unit and Power Transmession. 

Advantages of our Sight Glass: 

1)Tempered Glass is better than a polypropylene glass

Withstand higher temperature and never age and color change.

Natural glass Will not be corroded and will not chemically react with various oils and various liquids.So our sight glass an have the same life time with your requirements even more long life time than the equipment.

2)Max dimensions of sight window of each size.

We design all of our sight glasses to have a max sight window for viewing.It is very important for you to see clear inside especially when choose the small size.

3)Different metal material body of sight glass

Metal body is more stronger and better metal perform to meet different working condition.Customer can choose the right metal sight glass for their application.

A) Brass HPb57-3 or other brass free of lead.

B) Aluminum 6061-T6

C) Stainless steel 304 /316

D)Steel plated(Zinc plated,Nickel plated or chrome plated)

4)Stainless steel 304 Reflector / the same material of the body as a whole.

It is easy to see the color of oil or liquid and view the level of liquid inside of the the housing of the equipments. Stainless steel 304 reflector have a prefect function in corrosion resistant, never age and color change.

5)Ball indicator inside of our sight glass.

Ball indicator for easier viewing at a distance and the liquid level of the sight glass.We will offer different color ball to meet your liquid color. Make sure the liquid inside is easy to view even in a dark light.

 

 

Brass Oil Sight Glass(BSP Metric Thread)
Item No. Size A(mm) B(mm) C(mm) D(mm) E(mm) F(mm) SW(mm) Max MPa/Temperateru
GM-BM10 M10 M10x1 7 7 14 15 5 13 Metric and BSP Thread DIN3869-ED Gaskets for Sealing.  1MPa  /  Below Zero 30 to 120 Centigrade((FKM/Viton to 180 Centigrade)
GM-BM16 M16 M16x1.5 7.5 7 14.5 22 10 19
GM-BM20 M20 M20x1.5 8 7 15 26 14 23
GM-BM22 M22 M22x1.5 8 8 16 28 15 24
GM-BM26 M26 M26x1.5 9 9 18 31 20 26
GM-BM27 M27 M27x1.5 9 9 18 32 20 26
GM-BM30 M30 M30x1.5 10 9 19 37 22 33
GM-BM33 M33 M33x1.5 11 9 20 40 24 36
GM-BM42 M42 M42x1.5 12 10 22 52 31 46
GM-BM60 M60 M60x2 13.5 10.5 24 71 46 62
 
GM-BG38 3/8" G 3/8" 7.5 7 14.5 22 10 19
GM-BG12 1/2" G 1/2" 8 7 15 26 14 23
GM-BG34 3/4" G 3/4" 9 9 18 32 20 26
GM-BG10 1" G 1" 11 9 20 40 24 36
GM-BG114 1-1/4" G1-1/4" 12 9 21 50 35 42
GM-BG112 1-1/2" G1-1/2" 13 10 23 56 39 48
GM-BG200 2" G 2" 13 10 23 70 48 60

 

 

Aluminum Oil Sight Glass(Metric & BSP Thread)
Item No. Size A(mm) B(mm) C(mm) D(mm) E(mm) F(mm) SW(mm) Max MPa/Temperateru
GM-AM10 M10 M10x1 7 7 14 15 5 13 Metric and BSP Thread DIN3869-ED Gaskets for Sealing.  1MPa  /  Below Zero 30 to 120 Centigrade((FKM/Viton to 180 Centigrade)
GM-AM16 M16 M16x1.5 7.5 7 14.5 22 10 19
GM-AM20 M20 M20x1.5 8 7 15 26 14 23
GM-AM22 M22 M22x1.5 8 8 16 28 15 24
GM-AM26 M26 M26x1.5 9 9 18 31 20 26
GM-AM27 M27 M27x1.5 9 9 18 32 20 26
GM-AM30 M30 M30x1.5 10 9 19 37 22 33
GM-AM33 M33 M33x1.5 11 9 20 40 24 36
GM-AM42 M42 M42x1.5 12 10 22 52 31 46
GM-AM60 M60 M60x2 13.5 10.5 24 71 46 62
 
GM-AG38 3/8" G 3/8" 7.5 7 14.5 22 10 19
GM-AG12 1/2" G 1/2" 8 7 15 26 14 23
GM-AG34 3/4" G 3/4" 9 9 18 32 20 26
GM-AG10 1" G 1" 11 9 20 40 24 36
GM-AG114 1-1/4" G1-1/4" 12 9 21 50 35 42
GM-AG112 1-1/2" G1-1/2" 13 10 23 56 39 48
GM-AG200 2" G 2" 13 10 23 70 48 60

 

 

Hexagon Brass Oil Sight Glass(BSP & Metric Thread)
Item No. Size A(mm) B(mm) C(mm) D(mm) E(mm) SW(mm) Max Mpa Temperature
GM-BHM10 M10 M10x1 7 7 14 5 14 1MPa Metric and BSP Thread DIN3869-ED Gaskets for Sealing.  Below Zero 30 to 120 Centigrade((FKM/Viton to 180 Centigrade)
GM-BHM16 M16 M16x1.5 7 7 14 10 22
GM-BHM20 M20 M20x1.5 8 7 15 16 26
GM-BHM22 M22 M22x1.5 8 7 15 17 28
GM-BHM26 M26 M26x1.5 9 8 17 20 33
GM-BHM27 M27 M27x1.5 9 8 17 20 33
GM-BHM30 M30 M30x1.5 10 9 19 23 36
GM-BHM33 M33 M33x1.5 11 10 22 25 40
GM-BHM42 M42 M42x1.5 12 10 22 31 52
GM-BHM60 M60 M60x2 13 10 23 46 71
 
GM-BHG38 3/8" G 3/8" 7 7 14 10 22
GM-BHG12 1/2" G 1/2" 8 7 15 16 26
GM-BHG34 3/4" G 3/4" 9 8 17 20 33
GM-BHG10 1" G 1" 12 10 22 25 40
GM-BHG114 1-1/4" G1-1/4" 14 10 24 35 50
GM-BHG112 1-1/2" G1-1/2" 14 11 25 39 55
GM-BHG200 2" G2" 14 12 26 48 71

 

 

Hexagon Aluminum Oil Level Sight Glass(BSP & Metric Thread)
Item No. Size A(mm) B(mm) C(mm) D(mm) E(mm) SW(mm) Max Mpa Temperature
GM-AHM10 M10 M10x1 7 7 14 5 14 1MPa Metric and BSP Thread DIN3869-ED Gaskets for Sealing.  Below Zero 30 to 120 Centigrade((FKM/Viton to 180 Centigrade)
GM-AHM16 M16 M16x1.5 7 7 14 10 22
GM-AHM20 M20 M20x1.5 8 7 15 16 26
GM-AHM22 M22 M22x1.5 8 7 15 17 28
GM-AHM26 M26 M26x1.5 9 8 17 20 33
GM-AHM27 M27 M27x1.5 9 8 17 20 33
GM-AHM30 M30 M30x1.5 10 9 19 23 36
GM-AHM33 M33 M33x1.5 12 10 22 25 40
GM-AHM42 M42 M42x1.5  12  10  22  31  52
GM-AHM60 M62 M60x2 12 10 23 46  71
 
GM-AHG38 3/8" G 3/8" 7 7 14 10 22
GM-AHG12 1/2" G 1/2" 8 7 15 16 26
GM-AHG34 3/4" G 3/4" 9 8 17 20 33
GM-AHG10 1" G 1" 12 10 22 25 40
GM-AHG114 1-1/4" G1-1/4"  14  10  24  35  50
GM-AHG112 1-1/2" G1-1/2"  14  11  25  39  55
GM-AHG20 2" G2" 14 12  26  48 71

 

 

Hexagon Steel Oil Sight Glass Zinc Plated (Metric & BSP)
Item No. Size A(mm) B(mm) C(mm) D(mm) E(mm) SW(mm) Max Mpa Temperature
GM-SM10 M10 M10x1 7 7 14 5 14 1MPa Metric and BSP Thread DIN3869-ED Gaskets for Sealing.  Below Zero 30 to 120 Centigrade((FKM/Viton to 180 Centigrade)
GM-SM16 M16 M16x1.5 7 7 14 10 22
GM-SM20 M20 M20x1.5 8 7 15 16 26
GM-SM22 M22 M22x1.5 8 7 15 17 28
GM-SM26 M26 M26x1.5 9 8 17 20 33
GM-SM27 M27 M27x1.5 9 8 17 20 33
GM-SM30 M30 M30x1.5 10 9 19 23 36
GM-SM33 M33 M33x1.5 12 10 22 25 40
GM-SM42 M42 M42x1.5  12  10  22  31  52
GM-SM60 M60 M60X2  13  10  23  46  71
 
GM-SG38 3/8" G 3/8" 7 7 14 10 22
GM-SG12 1/2" G 1/2" 8 7 15 16 26
GM-SG34 3/4" G 3/4" 9 8 17 20 33
GM-SG10 1" G1" 12 10 22 25 40
GM-SG114 1-1/4" G1-1/4"  14  10  24  35  50
GM-SG112 1-1/2" G1-1/2"  14  11  25  39  55
GM-SG20 2" G 2" 14 12 26 48 71

 

 

Circular Brass Oil Sight Glass With Relfector (Metric & BSP)
Item No. Size A(mm) B(mm) C(mm) D(mm) E(mm) F(mm) H(mm) Max MPa/Temperateru
GM-CBM16 M16 M16x1.5 2.6 4 8 9 15 22 1MPa  /  Below Zero 30 to 120 Centigrade ((FKM/Viton to 180 Centigrade)
GM-CBM18 M18 M18x1.5 2.6 4 8 9 15 22
GM-CBM20 M20 M20x1.5 2.6 4 8 11.5 17.5 26
GM-CBM22 M22 M22x1.5 2.6 4 8 11.5 17.5 26
GM-CBM24 M24 M24x1.5 2.6 4 8 16 22 30
GM-CBM26 M26 M26x1.5 2.6 4 8 16 22 32
GM-CBM27 M27 M27x1.5 2.6 4 8 16 22 32
GM-CBM30 M30 M30x1.5 2.6 4.5 8.5 20 26 36
GM-CBM30D M30 M30x2 2.6 4.5 8.5 20 26 36
GM-CBM33 M33 M33x1.5 2.6 4.5 9 22 28 38
GM-CBM33D M33 M33x2 2.6 4.5 9 22 28 38
GM-CBM35 M35 M35x1.5 2.6 4.5 9 25 31 42
GM-CBM36 M36 M36x1.5 2.6 4.5 9 25 31 42 The glass can make red marking.The reflector can paint white
GM-CBM42 M42 M42x1.5 3.2 4.5 10 28 34 48
GM-CBM48 M48 M48x1.5 3.2 5 11 33 39 55
GM-CBM60 M60 M60x2 4.5 5.5 11 43 49 69
 
GM-CBG38 3/8" G 3/8" 2.6 4 8 9 15 22
GM-CBG12 1/2" G 1/2" 2.6 4 8 11.5 17.5 26
GM-CBG34 3/4" G 3/4" 2.6 4 8 16 22 32
GM-CBG100 1" G 1" 2.6 4.5 9 22 28 38
GM-CBG114 1 1/4" G 1 1/4" 3.2 4.5 10 28 36 48
GM-CBG112 1 1/2" G 1 1/2" 3.2 5 11 33 39 55
GM-CBG200 2" G 2" 4.5 5.5 11 43 49 69

 

 

 

Hexagon Stainless Steel Oil Sight Glass(Metric thread,BSP & NPT)
Item No. Size A(mm) B(mm) C(mm) D(mm) E(mm) SW(mm) Max Mpa Temperature
GM-SSM10 M10 M10x1 7 7 14 5 14 1MPa Below Zero 30 to 120 Centigrade ((FKM/Viton to 180 Centigrade)
GM-SSM16 M16 M16x1.5 7 7 14 10 22
GM-SSM20 M20 M20x1.5 8 7 15 16 26
GM-SSM22 M22 M22x1.5 8 7 15 17 28
GM-SSM26 M26 M26x1.5 9 8 17 20 33
GM-SSM27 M27 M27x1.5 9 8 17 20 33
GM-SSM30 M30 M30x1.5 10 9 19 23 36
GM-SSM33 M33 M33x1.5 12 10 22 25 40
 
GM-SSG38 3/8" G 3/8" 7 7 14 10 22 1MPa Below Zero 30 to 120 Centigrade ((FKM/Viton to 180 Centigrade)
GM-SSG12 1/2" G 1/2" 8 7 15 16 26
GM-SSG34 3/4" G 3/4" 9 8 17 20 33
GM-SSG10 1" G 1" 12 10 22 25 40
GM-SSG114 1-1/4" G1-1/4" 14 10 24 35 50
 
GM-SS38 3/8" NPT 3/8" 16 11 27 11 19 1MPa Below Zero 30 to 120 Centigrade ((FKM/Viton to 180 Centigrade)
GM-SS12 1/2" NPT 1/2" 16.5 11.5 28 13 24
GM-SS34 3/4" NPT 3/4" 17 12 29 19 28
GM-SN10 1" NPT 1" 20 12 32 25 35
GM-SSU116 1 1/16" 1 1/16-12 UN 15 12 27 19 31

 

 

 

Hexagon Brass Oil Sight glass (NPT Thread)
Item No. Size(mm) A(mm) B(mm) C(mm) D(mm) E(mm) SW(mm) Max Mpa Temperature
GM-BN38 3/8" NPT 3/8" 16 11 27 11 19 1MPa Below Zero 30 to 120 Centigrade ((FKM/Viton to 180 Centigrade)
GM-BN12 1/2" NPT 1/2" 16.5 11.5 28 13 24
GM-BN34 3/4" NPT 3/4" 17 12 29 19 28
GM-BN10 1" NPT 1" 20 12 32 25 35
GM-BN114 1-1/4" NPT1-1/4" 20 12 32 35 48
GM-BN112 1-1/2" NPT1-1/2" 22 13 35 39 56
GM-BN20 2" NPT 2" 23 13 36 48 66

 

 

 

Hexagon Steel Oil Sight Glass Zinc Plated (NPT Thread)
Item No. Size A(mm) B(mm) C(mm) D(mm) E(mm) SW(mm) Max Mpa Temperature
GM-SN38 3/8" NPT 3/8" 16 11 27 11 19 1MPa Below Zero 30 to 120 Centigrade ((FKM/Viton to 180 Centigrade)
GM-SN12 1/2" NPT 1/2" 16.5 11.5 28 13 24
GM-SN34 3/4" NPT 3/4" 17 12 29 19 28
GM-SN10 1" NPT 1" 20 12 32 25 35
GM-SN114 1-1/4" NPT1-1/4" 20 12 32 35 48
GM-SN112 1-1/2" NPT1-1/2" 22 13 35 39 56
GM-SN20 2" NPT 2" 23 13 36 48 66
GM-SU116 1 1/16" 1 1/16"-12 UNF 15 12 27 19 31

 

Domed Hexagon Oil Sight Glass with locking nut (NPT,BSP & Metric Thread)
Item No. Size(mm) A(mm) B(mm) C(mm) D(mm) E(mm) F(mm) SW(mm) Temperature
GM-HDN14 1/4" NPT 1/4" 12 16 9 12 10 21 Metric and BSP Thread DIN38-ED Gaskets for Sealing.With Borosilicate Glass Below Zero 25 to 200 Centigrade
GM-HDN38 3/8" NPT 3/8" 13 16 11 16 13 24
GM-HDN12 1/2" NPT 1/2" 14 16 13 18 13 26
GM-HDN34 3/4" NPT 3/4" 17 16 20 25 15 36
GM-HDN10 1" NPT 1" 20 16 25 30 15 40
GM-HDG14 1/4" G1/4" 12 16 9 12 10 21
GM-HDG38 3/8" G3/8" 10 16 11 16 13 24
GM-HDG12 1/2" G1/2" 10 16 13 18 13 26
GM-HDG34 3/4" G3/4" 12 16 20 25 15 36
GM-HDG10 1" G1" 12 16 25 30 15 40
GM-HDM12 M12 M12x1 10 16 9 12 10 21
GM-HDM12 M12 M12x1.5 10 16 9 12 10 21
GM-HDM14 M14 M14x1.5 10 16 9 12 10 21
GM-HDM16 M16 M16x1.5 10 16 11 16 13 24
GM-HDM20 M20 M20x1.5 10 16 12 18 13 26
GM-HDM22 M22 M22x1.5 10 16 13 18 13 26
GM-HDM26 M26 M26x1.5 11 16 19 25 14 36
GM-HDM27 M27 M27x1.5 11 16 20 25 15 36
GM-HDM33 M33 M33x1.5 11 16 25 30 15 40

 

Cheap Aluminum Oil Sight Glass With Plastic Glass (Metric & BSP)
Item No. Size A(mm) B(mm) C(mm) D(mm) E(mm) SW(mm) Max Mpa Temperature
GM-ACM10 M10 M10x1 7 7 14 5 14 0.4MPa Below Zero 20 to 80 Centigrade
GM-ACM16 M16 M16x1.5 7 7 14 10 22
GM-ACM20 M20 M20x1.5 8 7 15 16 26
GM-ACM22 M22 M22x1.5 8 7 15 17 28
GM-ACM26 M26 M26x1.5 9 8 17 20 33
GM-ACM27 M27 M27x1.5 9 8 17 20 33
GM-ACM30 M30 M30x1.5 10 9 19 23 36
GM-ACM33 M33 M33x1.5 12 10 22 25 40
 
GM-ACG38 3/8" G 3/8" 7 7 14 10 22
GM-ACG12 1/2" G 1/2" 8 7 15 16 26
GM-ACG34 3/4" G 3/4" 9 8 17 20 33
GM-ACG10 1" G 1" 12 10 22 25 40

 

 

Plastic Oil Sight Glass(BSP & Metric Thread)
Item No. Size A(mm) B(mm) C(mm) D(mm) E(mm) F(mm) SW(mm) Max MPa/Temperateru
GM-PM16 M16 M16x1.5 7 9 16 14 22 17 0.4MPa  /  Below Zero 20 to 70 Centigrade
GM-PM18 M16 M18x1.5 8 9 17 15 25 22
GM-PM20 M20 M20x1.5 8 9 17 16 27 24
GM-PM22 M22 M22x1.5 8 9 17 18 27 24
GM-PM24 M24 M24x1.5 9 9 18 19 31 27
GM-PM26 M26 M26x1.5 9 9 18 20 31 27
GM-PM27 M27 M27x1.5 9 9 18 22 36 31
GM-PM30 M30 M30x1.5 10 9 19 24 36 32
GM-PM33 M33 M33x1.5 11 8 19 26 41 36
GM-PM36  M36 M36x1.5 11 11 22 28 46 41
GM-PM42 M42 M42x1.5 12 12 24 38 52 46
GM-PM60 M60 M60x2.0 12 16 28 54 71 62
 
GM-PG38 G3/8" G3/8" 7 9 16 14 22 17
GM-PG12 G1/2" G1/2" 8 9 17 18 27 24
GM-PG34 G3/4" G3/4" 9 9 18 22 36 31
GM-PG10 G1" G1" 11 8 19 26 41 36
GM-PG114 G1-1/4" G1-1/4" 11 11 22 28 46 41
GM-PG134 G1-3/4" G1-3/4" 12 12 24 38 52 46
GM-PG200 G2" G2" 12 16 28 54 71 66

 

 

Circular Plastic Oil Sight Glass(Metric Thread)
Item No. Size A(mm) B(mm) C(mm) D(mm) E(mm) F(mm) Max MPa/Temperateru
GM-PCM16 M16 M16x1.5 7 8 15 14 20 0.4MPa  /  Below Zero 20 to 70 Centigrade
GM-PCM27 M27 M27x1.5 9 9 18 22 36
GM-PCM42 M42 M42x1.5 12 10 22 38 51
GM-PCM60 M60 M60x2.0 13 12 25 54 66

 

 

 

 

Press Fit Plastic Circular Oil Sight Glass
Item No. Fit Size E(mm) B(mm) C(mm) D(mm) A(mm) F(mm) Max MPa/Temperateru
GM-PP20 20 12 6 9 15 20 22 0.2MPa  /  Below Zero 20 to 70 Centigrade
GM-PP25 25 16 6 9 15 25 28
GM-PP32 32 20 7 9 17 32 35
GM-PP38 38 25 8 9 17 38 40
GM-PP40 40 28 8 10 18 40 45
GM-PP45 45 32 10 11 21 45 48
GM-PP55 55 40 10 11 21 55 58
GM-PP65 65 50 10 12 22 65 70

 

 

 

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