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Sight & Flow Indicators

Flow indicators and sight glasses are a simple and effective way of visually monitoring flow through pipe systems in many applications. Johnson Valves offer a range of spinner, ball, scale plate flow indicators and straight through sight glasses from several manufacturer’s including Spirax Sarco and Rhodes. 

JV190010 – Bronze Spinner Type Flow Indicator

The JV190010 spinner type flow indicator is a simple and effective solution to visually detect flows from a distance. Used in many applications including seawater, pump, compressor and diesel systems.

Type
Spinner • Dome Sight Glass
Size & Connections
6mm (1/4″) to 25mm (1″) • BSP Threaded (NPT on request)
Duty
Air • Oil • Water • Liquids compatible with materials
Materials
Bronze Body • Plastic Spinner
Max Working Pressure
10 Bar
Temperature Range
0°C to 100°C
Contact UsJV190010 – Bronze Spinner Type Flow Indicator - PDF Datasheet

JV190010 – Bronze Spinner Type Flow Indicator

JV190011 – Stainless Steel Ball Type Flow Indicator

The JV190011 ball type flow indicator is a simple and effective solution to visually detect flows from a distance. The ball type indicator is constructed with materials which are suitable for higher pressure and temperatures such as condensate in steam systems.

Type
Ball • Dome Sight Glass
Size & Connections
6mm (1/4″) to 40mm (1 1/2″) • BSP Threaded (NPT on request)
Duty
Air • Oil • Water • Liquids compatible with materials
Materials
Stainless Steel Body • PTFE Ball
Max Working Pressure
16 Bar
Temperature Range
0°C to 200°C
Contact UsJV190011 – Stainless Steel Ball Type Flow Indicator - PDF Datasheet

JV190011 – Stainless Steel Ball Type Flow Indicator

JV190012 – Bronze Spout Type Flow Indicator

The JV190012 spout type flow indicator is ideal for gravity feed systems and intermittent liquid flow duties. This indicator has a large viewing window and an integral drip lip.

Type
Spout • Straight Through • Double Window Sight Glass
Size & Connections
15mm (1/2″) to 25mm (1″) • BSP Threaded (NPT on request)
Duty
Air • Oil • Water • Liquids compatible with materials
Materials
Bronze Body • Brass Cover • Toughened Soda Lime Glass (Borosilicate on request)
Max Working Pressure
10 Bar
Temperature Range
0°C to 100°C
Contact UsJV190012 – Bronze Spout Type Type Flow Indicator - PDF Datasheet

JV190012 – Bronze Spout Type Type Flow Indicator

JV190013 – Stainless Steel / Carbon Steel Spout Type Flow Indicator

This JV190013 has a plain spout cast in the body and the integral drip lip makes it ideal for leak detection. It is used to check for the presence of a liquid where there is intermittent flow, partially filled lines or entrained air.

Type
Spout • Straight Through • Double Window Sight Glass
Size & Connections
6mm (1/4″) to 250mm (10″) • BSP Threaded • PN16 Flanged (ANSI 150/300 on request)
Duty
Air • Oil • Water • Liquids compatible with materials
Materials
Stainless or Carbon Steel Body • Toughened Soda Lime Glass (Borosilicate on request)
Max Working Pressure
Up to 40 Bar dependent on materials & size
Max Temperature Range
Up to 200°C dependent on materials & size
Contact UsJV190013 – Stainless Steel / Carbon Steel Spout Type Type Flow Indicator- PDF Datasheet

JV190013 – Stainless Steel / Carbon Steel Spout Type Type Flow Indicator

JV190016 – Bronze Scale Plate Flow Indicator

The JV190016 flow indicator will give you a reading of 0 to 10 on a scale plate. Charts providing the approximate water flow rate are available.

Type
Scale Plate (0 to 10)
Size & Connections
15mm (1/2″) to 25mm (1″) • BSPP Threaded (NPT on request)
Duty
Air • Oil • Water • Liquids compatible with materials
Materials
Bronze Body • Stainless Steel Scale Plate • Soda Lime Glass (Borosilicate on request)
Max Working Pressure
16 Bar
Max Temperature Range
Up to 200°C
Contact UsJV190016 – Bronze Scale Plate Flow Indicator- PDF Datasheet

JV190016 – Bronze Scale Plate Flow Indicator

JV190017 – Stainless Steel / Carbon Steel Scale Plate Flow Indicator

The JV190017 flow indicator will give you a reading of 0 to 10 on a scale plate. Charts providing the approximate water flow rate are available.

Type
Scale Plate (0 to 10)
Size & Connections
6mm (1/4″) to 200mm (8″) •  Threaded • Socket Weld  • Flanged
Duty
Air • Oil • Water • Liquids compatible with materials
Materials
Stainless or Carbon Steel Body • Soda Lime Glass (Borosilicate on request)
Max Working Pressure
Up to 40 Bar dependent on materials & size
Max Temperature Range
Up to 200°C dependent on materials & size
Contact UsJV190017 – Stainless Steel / Carbon Steel Scale Plate Flow Indicator- PDF Datasheet

JV190017 – Stainless Steel / Carbon Steel Scale Plate Flow Indicator

JV190018 – Stainless Steel Sight Tube Flow Indicator

This JV190018 has a plain straight through borosilicate glass tube with stainless steel flanged ends. It is used to check for the presence of a liquid where there is intermittent flow, partially filled lines or entrained air.

Type
Straight Through Sight Tube
Size & Connections
DN15 to DN200 •  PN16 Flanged (ANSI 150 on request)
Duty
Air • Oil • Water • Liquids compatible with materials
Materials
Stainless Steel Flanges & Tie Rods • Borosilicate Glass
Max Working Pressure
DN15-25: 10 Bar • DN40-200: 6 Bar
Max Temperature Range
Up to 150°C
Contact UsJV190018 – Stainless Steel Sight Tube Flow Indicator- PDF Datasheet

JV190018 – Stainless Steel Sight Tube Flow Indicator

SG – Spirax Brass Single / Double Window Sight Glass

Manufactured by Spirax Sarco, the SG sight glass is robustly manufactured and is suitable for detecting flow of many industrial fluids.

Type
Straight Through • Single or Double Window Sight Glass
Size & Connections
10mm (3/8″) to 50mm (2″) • BSP Threaded (NPT on request)
Duty
Air • Oil • Water • Liquids compatible with materials
Materials
Brass Body (10-25mm) • Bronze Body (32-50mm) • Toughened Soda Lime Glass
Max Working Pressure
5 Bar
Max Temperature Range
148°C @ 13.5 Bar • 90°C @ 5 Bar
Contact UsSG – Spirax Brass Single / Double Window Sight Glass- PDF DatasheetManufactured by Spirax Sarco

SG – Spirax Brass Single / Double Window Sight Glass

SH – Spirax Hills Bronze Sight Glass & Check Valve

Manufactured by Spirax Sarco, the SH sight check is a sight glass and check valve combination in one unit. A ball in the top of the flow tube is lifted off its seat by the fluid as it flows through the cylindrical window to the outlet connection. The ball movement makes the flow easy to see yet provides shut-off on reverse flow.

Type
Sight & Check • Tubular Window Sight Glass
Size & Connections
15mm (1/2″) to 25mm (1″) • BSP Threaded (NPT on request)
Duty
Air • Oil • Water • Liquids compatible with materials
Materials
Bronze Body • Borosilicate Glass • Copper Discharge Tube • Stainless Steel Ball
Max Working Pressure
3.5 Bar
Temperature Range
0°C to 148°C
Contact UsSH – Spirax Hills Bronze Sight Glass & Check Valve- PDF DatasheetManufactured by Spirax Sarco

SH – Spirax Hills Bronze Sight Glass & Check Valve

400 – Rhodes Bronze / Stainless Steel Flow Indicator

The Rhodes 400 range of sight and flow indicators are UK manufactured to a high-quality and are used extensively in the process and petrochemical industries around the world.

Type
Nylon Spinner or PTFE Ball
Size & Connections
6mm (1/4″) to 25mm (1″) • BSP Threaded (NPT on request)
Duty
Air • Oil • Water • Process • Liquids compatible with materials
Materials
Bronze body with Soda Lime Glass or Stainless steel body with borosilicate glass
Max Working Pressure
Bronze: 7 Bar • Stainless Steel: 16 Bar
Max Temperature Range
0°C to 100°C
Contact Us400 – Rhodes Bronze / Stainless Steel Flow Indicator - PDF DatasheetRhodes

400 – Rhodes Bronze / Stainless Steel Flow Indicator