Fluid transfer & fittings

Sight Flow Indicators

Sight flow indicators and sight glasses in stainless, mild steel, polypropylene and FEP/PFA lined construction — double window, tubular, rotary wheel, flapper and tri-clamp, 15NB to 400NB.

Sight Flow Indicators

19 products

Double Window Sight Flow Indicators

8 items

Double Window Sight Flow Indicators Stainless steel jacketed double window sight flow indicator with two glass windows and jacket connections

Stainless steel jacketed double window sight flow indicator with two glass windows and jacket connections

SS Jacketed Double Window Sight Flow Indicator

Stainless jacketed double window, 25NB to 400NB

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Double Window Sight Flow Indicators Mild steel jacketed double window sight flow indicator with jacket body and two glass windows

MS Jacketed Double Window Sight Flow Indicator

Mild steel jacketed double window, 25NB to 400NB

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Double Window Sight Flow Indicators Stainless steel double window sight flow indicator with investment cast body and two glass windows

SS Double Window Sight Flow Indicator

Stainless double window, 25NB to 400NB

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Double Window Sight Flow Indicators Mild steel double window sight flow indicator with robust body and two toughened glass windows

MS Double Window Sight Flow Indicator

Mild steel / WCB double window, 25NB to 400NB

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Double Window Sight Flow Indicators Rotary wheel type double window sight flow indicator with stainless rotor visible through the glass

Rotary Wheel Type Double Window Sight Flow Indicator

Rotating wheel flow indicator, 25NB to 400NB

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Double Window Sight Flow Indicators Flapper type double window sight flow indicator with hinged stainless flapper visible through the window

Flapper Type Double Window Sight Flow Indicator

Hinged flapper flow indicator, 25NB to 400NB

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Double Window Sight Flow Indicators FEP PFA lined double window sight flow indicator with fluoropolymer lined body and two glass windows

Lined Double Window Sight Flow Indicator

FEP/PFA lined double window, 25NB to 400NB

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Double Window Sight Flow Indicators Polypropylene double window sight flow indicator with light weight PP body and two glass windows

PP Double Window Sight Flow Indicator

Polypropylene double window, 25NB to 150NB

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Tubular Sight Flow Indicators

11 items

Tubular Sight Flow Indicators FEP PFA lined stainless steel tubular sight flow indicator with borosilicate glass tube and tie rods

Lined SS Tubular Sight Flow Indicator

FEP/PFA lined stainless tubular, 15NB to 400NB

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Tubular Sight Flow Indicators FEP PFA lined mild steel tubular sight flow indicator with glass tube and galvanised tie rods

Lined MS Tubular Sight Flow Indicator

FEP/PFA lined mild steel tubular, 15NB to 400NB

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Tubular Sight Flow Indicators Stainless steel allen key tubular sight flow indicator with tie rods and borosilicate glass tube

SS Allen Key Tubular Sight Flow Indicator

Stainless allen key tubular, 15NB to 400NB, to 40 bar

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Tubular Sight Flow Indicators Mild steel allen key tubular sight flow indicator with galvanised tie rods and glass tube

MS Allen Key Tubular Sight Flow Indicator

Mild steel allen key tubular, 15NB to 400NB

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Tubular Sight Flow Indicators Stainless allen key tubular sight flow indicator with PTFE T-bush isolating the flange from the fluid

SS Allen Key with T-Bush Tubular Sight Flow Indicator

Stainless allen key with PTFE T-bush, 15NB to 400NB

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Tubular Sight Flow Indicators Mild steel allen key tubular sight flow indicator with PTFE T-bush and borosilicate glass tube

MS Allen Key with T-Bush Tubular Sight Flow Indicator

Mild steel allen key with PTFE T-bush, 15NB to 400NB

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Tubular Sight Flow Indicators Investment cast tubular sight flow indicator with cast stainless flanges and glass tube

IC Tubular Sight Flow Indicator

Investment cast tubular, 15NB to 150NB

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Tubular Sight Flow Indicators Mild steel check-nut tubular sight flow indicator with one piece frame and PTFE T-bushes

MS Check-Nut Tubular Sight Flow Indicator

Mild steel check-nut frame with PTFE T-bush, 15NB to 150NB

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Tubular Sight Flow Indicators Tri-clamp ended tubular sight flow indicator with hygienic TC connections and glass tube

TC End Tubular Sight Flow Indicator

Tri-clover ended tubular, 15NB to 200NB, 10 bar

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Tubular Sight Flow Indicators Azeotropic separation tubular sight flow indicator with separation flanges and glass tube

Azeotropic Separation Tubular Sight Flow Indicator

Density separation sight glass, diameters to 400NB

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Tubular Sight Flow Indicators Polypropylene tubular sight flow indicator with PP flanges and borosilicate glass tube

PP Tubular Sight Flow Indicator

Polypropylene tubular, 25NB to 150NB

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Engineering reference

Standards that apply across the sight flow indicators range.

These tables govern every item in this category. Product pages carry only their own dimensions.

Different drilling standards for flanges

Size NB	Dimension	ANSI B-16.5	BS-10 T-'E'	BS-10 T-'F'	PN 10
15	OD	90	83	95	95
15	PCD	60	67	67	65
15	Hole dia. / no. of holes	16/4	13/4	13/4	14/4
20	OD	100	102	102	105
20	PCD	70	73	73	75
20	Hole dia. / no. of holes	16/4	13/4	13/4	14/4
25	OD	110	114	121	115
25	PCD	79	83	87	85
25	Hole dia. / no. of holes	16/4	13/4	16/4	14/4
40	OD	125	133	140	150
40	PCD	98	98	105	110
40	Hole dia. / no. of holes	16/4	13/4	16/4	14/4
50	OD	150	152	165	165
50	PCD	121	114	127	125
50	Hole dia. / no. of holes	19/4	16/4	16/4	18/4
65	OD	180	165	184	185
65	PCD	140	127	146	145
65	Hole dia. / no. of holes	19/4	16/4	16/8	18/4
80	OD	190	184	203	200
80	PCD	152	146	165	160
80	Hole dia. / no. of holes	19/4	16/4	16/8	18/4
100	OD	230	216	229	220
100	PCD	190	184	190	180
100	Hole dia. / no. of holes	19/8	16/8	16/8	18/4
150	OD	280	279	305	285
150	PCD	241	235	260	240
150	Hole dia. / no. of holes	22/8	19/8	19/12	22/8
200	OD	345	337	368	340
200	PCD	298	292	324	295
200	Hole dia. / no. of holes	22/8	19/8	19/12	22/8
250	OD	405	406	432	395
250	PCD	362	256	381	350
250	Hole dia. / no. of holes	25/12	19/12	25/12	22/12
300	OD	485	457	489	445
300	PCD	432	406	438	400
300	Hole dia. / no. of holes	25/12	22/12	25/16	22/12
350	OD	535	527	552	505
350	PCD	476	470	495	460
350	Hole dia. / no. of holes	29/12	22/12	25/16	22/16
400	OD	595	578	610	565
400	PCD	540	521	552	515
400	Hole dia. / no. of holes	29/16	22/12	25/20	26/16

All dimensions in mm, reproduced as printed in the catalogue. The 250NB BS-10 Table E PCD is printed as 256 — confirm it with us before drilling to that figure.

LSSG tubular sight glass — drilling table (BS 10 Table E, Table F and ASA)

Cat. Ref.	Size	L1	L	E — D	E — P.C.D.	E — Holes	F — D	F — P.C.D.	F — Holes	ASA — D	ASA — P.C.D.	ASA — Holes
LSSG07	07	152	192	96	67	120 X 4	96	67	120 X 4	89	60	120 X 4
LSSG1	25	152	192	120	82	120 X 4	120	87	160 X 4	120	79	160 X 4
LSSG1.5	40	152	192	140	98	120 X 4	140	105	160 X 4	140	98	190 X 4
LSSG2	50	152	192	165	114	160 X 4	165	127	160 X 4	165	121	190 X 4
LSSG3	80	152	192	205	146	160 X 4	205	165	160 X 4	205	152	190 X 4
LSSG4	100	152	192	205	178	160 X 4	225	190	160 X 8	225	190	190 X 8
LSSG6	150	152	192	305	235	190 X 8	305	260	190 X 8	305	241	190 X 8

All dimensions in mm, transcribed exactly from the datasheet. The Holes column is printed in the form shown — the leading group is the hole diameter with the diameter symbol set as a zero (so “120 X 4” reads as Ø12 × 4 holes, “190 X 8” as Ø19 × 8 holes). Confirm the drilling against your mating flange before manufacture.

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