Flow Switch and Flow Indicators


Flow Switches and Sight Flow Indicators

 

Spinner flow indicator

Visual Flow Indicators

Flow Switches and Sight Flow Indicators

Features & Benefits

  • Flow Indicators suitable for water and other clear liquids and gas
  • 16 bar pressure and 200°C temperature capability
  • Precision moulded glass dome with yellow PPS plastic spinner
  • Can be used in any orientation
  • Bi-directional flow
  • Operates over a wide flow range
  • Competitively priced
  • Off the shelf deliveries
  • No routine maintenance needed
  • Flow indicators possess unrivalled flow and pressure drop performance
  • Flow Indicators manufactured in stainless steel or bronze

The Spinner type flow indicator is the latest design of low cost, ‘entry level’ type of Flow Indicators. This robust indicator outperforms other spinner instruments by a considerable margin. When calibrated flow indicators are not needed, this single sided indicator will satisfy most requirements within pipe sizes 8mm to 40mm.

The Spinner flow indicator starts to rotate once flow has commenced,this can be from as low as 0.7 litres per minute. The exceptional ratio between maximum and minimum flow is achieved by carefully tolerance in manufacture. This spinner design can be mounted both horizontal and vertical,offering bi-directional flow indication with low pressure losses.

When operators require a visual confirmation in their pipework for lubrication and coolant flow, this simple Spinner can provide a cost effective solution for plant protection.

Including one of these inexpensive fittings to pipework on a power plant may save thousands of dollars in downtime and bearing or pump impeller replacement. Add to this the safety implications resulting from plant failure and the true benefits may be fully appreciated.

 

Applications

This flow indicator is primarily used in plant protection applications to show lubrication or coolant flow to pumps, compressors or engines.

Applications for the Rising Ball Flow Indicator include:

  • Early warning of overheating, bearing or seal failure
  • Detecting changes in the colour and condition of liquids during processing
  • Pump, compressor and diesel protection
  • Ensuring that flow of cooling water is maintained to specialised welding equipment
  • Indication of air entrainment

Flow Indicators Technical Data

 

Materials:  
Body

- Stainless Steel 316: ASTM-A-351-2000 GR CF8M
- Bronze BS EN1982 CuSn5Zn5PB5-C-GS (formerly LG2)

Clamp Ring -Stainless Steel or Bronze
Spinner -PPS Plastic, ‘canary yellow’
Glass Dome -Annealed Borosilicate
‘O’ Ring -Viton
Gasket -Klingersil (C-4400) or equivalent
Fasteners -Stainless Steel
Pressure: -16 Bar (maximum working pressure)
Temperature: -200°C (maximum working temperature)
Connections: -BSP(F) parallel and NPT(F) taper

Every effort will be made to meet any special connection and seal requirements

Flow Switches and Sight Flow Indicators

Rising Ball

Visual Flow Indicator 

Flow Switches and Sight Flow Indicators

Features & Benefits

  • Clear flow indication
  • 16 bar pressure and 200°C temperature capability
  • Excellent chemical compatibility due to the materials of construction
  • Can be used on condensate duty as well as liquids and gas
  • Operates over a wide flow range
  • Durable PTFE ball and borosilicate glass dome
  • Competitively priced
  • Off the shelf deliveries
  • No routine maintenance needed
  • Unrivalled flow and pressure drop performance
  • Manufactured in stainless steel or bronze

The Rising Ball was introduced to give industry a high standard flow indicator that meets the needs of simple flow applications. When calibrated flow indicators are not needed,the Rising Ball will satisfy most requirements within pipe sizes8mm to 40mm.

Being constructed from high quality materials this in-line indicator will meet the needs of many chemical applications, as well as being suitable for water, oil and gases.

Whilst there is no flow in the pipe the white PTFE Ball remains seated in the body socket. As the flow rises the ball will lift out of the socket, clearly becoming visible. The ball will continue to rise and move freely in the dome as the flow rate increases.

The Rising Ball Flow Indicator needs to be mounted on a horizontal plane, with the glass dome positioned upwards. When there is flow in the pipes the ball can be seen clearly, giving a positive confirmation of flow.

 

Applications

This flow indicator is primarily used in plant protection applications to show lubrication or coolant flow to pumps, compressors or engines.

Applications for the Flow Indicator Rising Ball include:

  • Ensuring that the flow of cooling water is maintained to specialised medical factory equipment
  • Indicating chemical dosing on water treatment facilitates
  • Showing the presence of condensate in steam return lines
  • Detecting changes in the condition and colour of liquids during processing
  • Maintaining demineralised water rinsing essential to electronics components manufacture

Technical Data

Materials:  
Body

- Stainless Steel 316: ASTM-A-351-2000 GR CF8M
- Bronze BS EN1982 CuSn5Zn5PB5-C-GS (formerly LG2)

Clamp Ring -Stainless Steel or Bronze
Ball -PTFE ‘Teflon’
Glass Dome -Annealed Borosilicate
‘O’ Ring -Viton
Gasket -Klingersil (C-4400) or equivalent
Fasteners -Stainless Steel
Pressure: -16 Bar (maximum working pressure)
Temperature: -200°C (maximum working temperature)
Connections: -BSP(F) parallel and NPT(F) taper

Every effort will be made to meet any special connection and seal requirements

Flow Switches and Sight Flow Indicators

Double Window

Flap & Spout Visual Sight Indicator

Flow Switches and Sight Flow Indicators
Flow Switches and Sight Flow Indicators

This new double window Flow Indicator range is most useful where visual inspection

of the pipeline content is needed as a plant safety or product quality measure.

The sizeable windows allow an excellent view of the conditions in the line.

The plain Spout design affords visual inspection only while the hinged internal Flap

with its graduated scale allows a check on flow rate changes and for instance, affords

repeatability of valve positioning. The Flap or Spout can be used in transparent or slightly

opaque solutions and gas services. Both units will operate in horizontal or vertical orientation

(up only for Flap style).

Materials of Construction

 

Body & Covers

 

- Stainless Steel 316: ASTM-A-351-2000 GR CF8M
- Carbon Steel: ASTM-A-216-2000-GR-WCB
- Bronze BS EN1982 CuSn5Zn5PB5-C-GS (formerly LG2)

Glass

- Toughened Borosilicate (DIN 7080) (16 bar) or 

Toughened Soda lime (BIS 3463) (40 bar)

Gaskets

-PTFE

Flap

-Stainless Steel 316

Scale

-Polycarbonate

Fasteners

-Stainless A2

Temperature

-up to 250°C

Every effort will be made to meet any special connection and material requirements
 

Pressure Rating 40Bar (subject to Glass & Flange specification)

Sizes BSP, NPT and Flanged connection: PN16, 40, Ansi150, 300 

(other configurations also available)

Small 1/4”(8)  3/8”(10)  1/2”(15)  3/4”(20)  1”(25)
Medium 11/4”(32)  11/2”(40)  2”(50)
Large

3”(80)  4”(100)

All units are tested to 1.5 times the standard pressure limit applicable to the unit specification.

Test and 3.1b material certification are available if applied for at order placement.

 

Flow Switches and Sight Flow Indicators

Low Flow Switch

Low Cost Miniature Variable
Area Flow Switch

Flow Switches and Sight Flow Indicators

Flow Switch Features & Benefits

  • Complete stainless steel design
  • Universal mounting position
  • Small mounting dimensions
  • High flow switch accuracy
  • Flow Switch designed for low viscosity liquids
  • Small switch hysteresis

The flow switch model FMLF works according to a modified variable area principle. The float is guided in a cylindrical measuring tube by means of a spring. The flowing medium moves the float in the flow direction. A Reed contact is mounted outside the meter in a sealed housing. When the float reaches the position of the Reed contact the switch will close. With higher flows the the float moves further upward until it reaches a built-in float stop, still keeping the switch closed. This ensures a bi-stable switch function at any time. TheReed contact is adjustable over the full switching range of the meter.

Flow Switch Applications

The variable area flow switch model FMLF is used for monitoring the flow of low viscosity liquids, e.g. in cooling circuits and laser systems, for pump monitoring, compressors and many other applications. 

Flow Switch Dimensions

Flow Switches and Sight Flow Indicators

Electrical Contact

FMLF.2 (G1/4 connection)
N/O 200 V / 1 A / 20 VA SPDT 200 V / 1 A / 20 VA

FMLF.4 (G1/2 connection)
N/O 230 V / 3 A / 60 VA SPDT 250 V / 1,5 A / 50 VA

Flow Switches and Sight Flow Indicators
Flow Switches and Sight Flow Indicators

Flow rate indicators

Flow Switches and Sight Flow Indicators

These units are manufactured in a wide range of sizes and specification options but all have the same basic function.

A dial and mechanical indicator continuously monitor the flow rate at any given time whilst electrical switches can be specified to signal when a particular level has been reached during increasing or decreasing flow rates.

The Flow Switch is field adjustable over the full range. Where batching,trending, totalising or recording is required, all flow switch units can be supplied with a 0-10V or 4-20mA output. All sizes are manufactured to the same simple design concept, the main characteristic of which ensures that the pressure drops are confined to an absolute minimum (see ‘pressure drop’ charts) across the vane orifice at full flow, with viscosities as high as 600cS.

Sizes are defined by pipe size and / or maximum flow capacity, and every flow switch is individually calibrated so that full scale deflection is used in each application i.e. the maximum scale reading coincides with the maximum requirement of system as specified by the customer. Calibration may be in any units with single or dual scale to specification.

Flow Switches and Sight Flow Indicators
Flow Switches and Sight Flow Indicators
Flow Switches and Sight Flow Indicators

Small, Medium, Large Flow Switch

The flow switch body houses a spring-loaded valve plate (vane)which pivots off-centre in a hemispherical cavity. Thus the vane and cavity have a variable area orifice relationship. This gives both a high flow range and a linear relationship between flow rate and vane displacement. The vane indirectly operates both the indicating needle and an adjustable cam, which in turn triggers the microswitch at any chosen setting of flow rate. Two switches can be supplied to provide high and low (or 'low-low') flow switching.

Flow Switch Features & Benefits

  • All metal construction - no tubes of glass or plastic to break.
  • Spring loaded mechanical design - requires no straight pipe run and not affected by orientation.
  • Limited movement on internal parts - minimal wear and down time.
  • Modular design - reduces maintenance costs, down time, and production loss.
  • Direct indication & field adjustable switch(es) - monitors critical flows and provides alarm(s).
  • 1% of rate repeatable switch set point - accurate & reliable through all operation cycles.
  • Weatherproof enclosure box to IP65 (Nema 4).
  • Flow through design - minimal pressure loss.
  • Individually calibrated to customer specification - ensures accuracy.
  • Adjustable under operating conditions.
  • Scale is in units (e.g litres/minute).
  • Large range of body materials available.
  • Size range from 8mm (1/4”) to 200mm (8").
  • May be installed in any position.
  • Orientation of enclosure box easily changed.
  • High switch rating - 10 to 15 Amps.
  • ATEX approved Explosion-proof models available.
  • Will pass twice the maximum indicated flow.
  • Acts as non-return value.

Flow Switch Function

A scaled plate and mechanical indicator continuously monitor the flow rate at any given time whilst electrical switches can be specified to signal when a particular level has been reached during increasing or decreasing flow rates.

Low 0-0.5 LPM min
0-4 LPM max
Small

0-6 LPM min
0-70 LPM (pipe size 1/4” - 1”) max

Medium (3/4" to 2 1/2") 0-40 LPM min
(3/4" to 1 1/4") 0-400 LPM max
(1 1/2" to 2") 0-500 LPM max
(2 1/2") 0-800 LPM max
Large 3" 0-1500 LPM
4" 0-2000 LPM
6" 0-3500 LPM
8" 0-5000 LPM

Flow Switch Style

Through its unique modular design it allows for easy field installation and service. It does not require any straight pipe runs before or after the monitor thus minimising the installation footprint. The versatile design of the vane monitor allows for orientation to be mounted in any position. Vane style monitor operates when flow is introduced through the inlet connection making direct contact with the vane that is mechanically linked to the indicator shaft. The fluid forces the vane to move through a contoured opening creating a variable orifice, the greater the flow the larger the orifice becomes for flow to pass. The vane style monitor is spring loaded and allows the vane to return on decreasing flows.

Flow Switches

Are field adjustable, suitable for batching, trending, totalising or recording where required. All switch units can be supplied with a 0-10v or 4-20mA output.

Flow Switch Sizes

All sizes are manufactured to the same simple design concept, the main characteristic of which ensures that the pressure drops are confined to an absolute minimum (see “pressure drop” charts) across the vane orifice at full flow,with viscosities as high as 600cS. Sizes are defined by pipe size and/or maximum flow capacity, and every flow switch is individually calibrated so that fulls cale deflection is used in each application i.e. the maximum scale reading coincides with the maximum requirements of system as specified by the customer. Calibration may be in any units with Single or Dual scale to specification.

Flow Switches and Sight Flow Indicators
Flow Switches and Sight Flow Indicators

Flow Switch Applications

Water, De-Ionised Water, Soluble Oils (Glycols), Petroleum BasedFluids, Synthetic Based Fluids, Coolants, Corrosive Fluids, Paints,Solvents, Air & Gases

Comparison
Comparable to similar style devices in the industry, the “flow through” design offers a low pressure loss. To ensure accuracy they are individually calibrated in any unit of measure to customer operating specifications.

Wafer

Flow Switches and Sight Flow Indicators

Function

A scaled plate and mechanical indicator continuously monitor the flow rate at any given time whilst electrical switches can be specified to signal when a particular level has been reached during increasing or decreasing flow rates.

Features

  • Direct reading Flow Rate Indication
  • Optional (field adjustable) switch(es)
  • Optional Non-Contact 4-20mA Output
  • High Pressure available
  • Mounts easily between Ansi, Jis or Din flanges
  • Mounts in any orientation
  • No straight Pipe Run required
  • Connection sizes from 3” to 12”

Minimum Scale 0-40 LPM
Maximum Scale on request

Style

Through its unique modular design it allows for easy field installation and service. It does not require any straight pipe runs before or after the monitor thus minimising the installation footprint. The versatile design of the vane monitor allows for orientation to be mounted in any position. Vane style monitor operates when flow is introduced through the inlet connection making direct contact with the vane that is mechanically linked to the indicator shaft, the fluid forces the vane to open. The vane style monitor is spring loaded and allows the vane to return on decreasing flows.

Switches

Are field adjustable, suitable for batching, trending, totalising or recording where required. All switch units can be supplied with a 0-10v or 4-20mA output.

Sizes

All sizes are manufactured to the same simple design concept, the main characteristic of which ensures that the pressure drops are confined to an absolute minimum across the vane orifice at full flow,with viscosities as high as 600cS. Sizes are defined by pipe size and/or maximum flow capacity, and every flow switch is individually calibrated so that full scale deflection is used in each application i.e.the maximum scale reading coincides with the maximum requirements of system as specified by the customer. Calibration may be in any units with Single or Dual scale to specification.

Applications

Water, De-Ionised Water, Soluble Oils (Glycols), Petroleum BasedFluids, Synthetic Based Fluids, Coolants, Corrosive Fluids, Paints,Solvents, Air & Gases

Comparison

Comparable to similar style devices in the industry, the “flow through” design offers a low pressure loss. To ensure accuracy they are individually calibrated in any unit of measure to customer operating specifications.

Dimensions

Flow Switches and Sight Flow Indicators
Flow Switches and Sight Flow Indicators

i-Mon
4-20mA Transducer

Flow Switches and Sight Flow Indicators

 

Programmable 4-20mA current loop transducer designed to be built into the flow indicators.

  • Based on the sophisticated Zettlex ST technology for inductive displacement sensing
  • Non-contact (no wear problems, no loading and no added hysteresis on the system to effect measurement at low flow)
  • Absolute measurement (no problems if power is disconnected and reconnected)
  • Robust construction (long life without problems)
  • Smart (one time factory calibration stored in in electronic memory)
  • Accurate (more than 1000 measurement points over full-scale deflection)
  • High resolution measurement (sensor can indicate changes in flow before the eye can)
  • Programmable output filter for stable output (damping of the pointer vibration)
  • Consists of two parts: electronics board and target (pointer replacement)
  • 3 wire or 2 wire version

Technical specifications 

Mechanical specification  
Measurement range 100°
Angle resolution 0.03°
Linearity ±1%
Gap range (electronics to target) 4.3mm... 5.8mma,b
Max concentricity ±1.5mm
Repeatability <0.2%
Electrical specification  
Operating voltage 8... 28V DC
Supply current 50mA maxd, 4... 20mAe
Reverse polarity protection Yes
Overvoltage protection up to 30V
Output signal 4... 20mAc
Load impedance

R<(Usupply - 3)/0.02d

R<(Usupply - 8)/0.02e

Resolution of the output signal >10 bit
Programmable output filter 0... 5s (0.5s steps)
Temperature stability <80ppm
Standard connections

3d/2e way terminal

block, wires<1.0mm2

Operating temperature -40°C... +85°C
Storage temperature -40°C... +85°C

a Specified performance is only within this range of the gap
b Gap is measured between top of the pointer and top of the
electronics board
c Guaranteed only within the full scale ±5% on both ends
d 3 wire version only
e 2 wire version only

Installation instructions

Flow Switches and Sight Flow Indicators

ATEX approved i-Mon

Certificate number FTZU09ATEX0221X
Product marking II 1G Ex ia IIC T4/T6
Ambient temperature for T4 -40°C<Ta<+85°C
Ambient temperature for T6 -40°C<Ta<+60°C
Applicable in zones 0, 1, 2
Ex data
Ui = 28V Ii = 120mA Pi = 0.82W Ci = 0nF Li = 5 H

List of Applications for the flow switch and flow indicators include -

Plant Compressors Stone Crushers Welding

Vacuum Pumps

Machine Tools

Cryoplants

Air Conditioning Refrigeration

Induction Furnaces

Steel Works Arc Furnace Concast Plants

Pump Manufacturers

Mining
Oil Field Burners Chemical Plants Paper Mills Lazer Beam Paint


Shipping

Applications for Switch and Indicator

Water Cooling

Lubrication Monitoring - even with vibration

Water cooling electric transformer and welding tips on larger machines

Correct the amount of flow of water. Vacuum pumps works best with constant amount. 2 switches high and low.

Generally 4EE (4-wire switch) enabling Engineers to cut out machine if lube fails. All types of machines, more especially transfer machines.

Monitoring Flow


Water Cooling and keeping circuits balanced

Roll Lubrication, especially carbon bearing –water cooled. Water cooling in general.

Where more than one pump is in battery – quick way to check all are performing properly.

Pumping water out.
Blocked Jets
Heat Exchangers
Lube Line, especially Crown Roll. water cooling

Monitoring flow – car plants

Many applications – as Flow-Mon units work if ship is rolling

Applications for Flow Switches

Blast Furnace
Electric Arc Furnace
Oxygen Lances
Vacuum Brazing Furnace
Stone Crushing
Welding Machines
Filters
Injection Moulding Machines Machine Tools
Rolling Mills
Dye Houses
Transmission and Gears
Effluent Treatment Plants Scrubbers
Chemical Applications
Breweries
Pump units
Mining
Smokeless Fuel Plants Generating Stations
Sugar Refining
Water Treatment
Nuclear Power
Rubber Moulding
Coke Ovens
Ore Mining
Cement manufacturing Aluminium Rolling and Smelting Diesel Engines
Foundries
Induction Heating
Mechanical Seals
Paper Manufacturers Refrigeration
Chocolate Manufacturers
Marine Engineering
Soap & Detergent manufacturing Whisky Distillery
Furnace – Oil Firing
Railroad – test house – hydraulics