Double Throw (DT) Volumetric Liquid Flow Switches
Description
Double Throw (DT) Volumetric Liquid Flow Switches are devices designed to monitor and control the flow of liquid within a system. They are capable of detecting changes in the flow rate and can switch between two different circuits based on the flow conditions. This functionality allows them to manage and direct the flow of liquids effectively, ensuring that systems operate within their specified parameters.
Working Principle
Double Throw (DT) Volumetric Liquid Flow Switches operate by utilizing a mechanism that can detect the flow rate of a liquid passing through them. They are equipped with either solid-state or electromechanical switches, which allow them to respond to changes in flow conditions. The double throw capability means that these switches can alternate between two circuits, providing flexibility in managing different flow scenarios. This makes them particularly useful in applications where precise flow control is necessary, as they can help maintain optimal operating conditions and prevent system failures.
Applications
Volumetric Liquid Flow Switches are used in a variety of applications. For instance, in water systems, they are often made of materials like brass or bronze due to their resistance to corrosion and rusting. These switches are also applicable in systems where plastic materials are suitable, such as environments not prone to freezing or high temperatures. Specific examples include their use in industrial water treatment facilities, where they help manage the flow of water and wastewater, ensuring efficient processing and compliance with environmental regulations.
Advantages over other Materials - Metals
Plastic materials used in some volumetric liquid flow switches offer advantages over metals like brass or bronze. Plastics are lightweight, extremely durable, and resistant to rust, making them suitable for applications where weight and corrosion resistance are critical factors. Additionally, plastic switches can be more cost-effective in environments where metal corrosion is a concern, providing a longer lifespan and reducing maintenance needs.
Limitations
One limitation of Double Throw (DT) Volumetric Liquid Flow Switches is their dependency on the type of media they are exposed to. For example, plastic switches may not be suitable for environments with extreme temperatures, as they can be prone to expansion or contraction. Additionally, the operating pressure and temperature ranges must be carefully considered to ensure the switch materials can withstand the conditions without degrading.
Considerations
When selecting Double Throw (DT) Volumetric Liquid Flow Switches, several factors should be considered. Initial costs can vary depending on the materials and specifications required for the application. Operating expenses may be influenced by the durability and maintenance needs of the switch, with plastic options potentially offering lower maintenance costs due to their resistance to corrosion. Accuracy is another critical factor, as the switch must reliably detect and respond to changes in flow conditions. Replacement and maintenance costs should also be evaluated, as these can impact the overall cost-effectiveness of the switch over its operational life.
from Fluid Components Intl. (FCI)
The FLT93C insertion and inline type FlexSwitches for sanitary flow, level and temperature monitoring represents the first true technological breakthrough in thermal technology in over a decade. This product is specifically designed for sanitary 3A process applications. FCI is the only thermal... [See More]
- Throws: Double Throw
- Mounting: Insertion
- Meter Technology: Thermal
- End Fittings: In-line Flanged
from Fluid Components Intl. (FCI)
The FLT93L inline type FlexSwitch for flow and temperature monitoring represents the first true technological breakthrough in thermal technology in over a decade. FCI is the only thermal manufacturer providing temperature compensation to ensure set point accuracy for process temperatures that vary... [See More]
- Throws: Double Throw
- Pipe Diameter: 0.75 to 1.00
- Meter Technology: Thermal
- Mounting: In-line
from Fluid Components Intl. (FCI)
The FLT93B BASIC insertion type FlexSwitch for flow and temperature monitoring represents the first true technological breakthrough in thermal technology in over a decade. FCI is the only thermal manufacturer providing temperature compensation to ensure set point accuracy for process temperatures... [See More]
- Throws: Double Throw
- Pipe Diameter: 0.75
- Meter Technology: Thermal
- Mounting: Insertion
from Fluid Components Intl. (FCI)
The FLT93F insertion type FlexSwitch for flow and temperature monitoring represents the first true technological breakthrough in thermal technology in over a decade. This product was designed for heavy industrial environments including high temperature and high pressure. FCI is the only thermal... [See More]
- Throws: Double Throw
- Pipe Diameter: 0.25 to 1.00
- Meter Technology: Thermal
- Mounting: Insertion
from Fluid Components Intl. (FCI)
The FLT93S insertion type FlexSwitch for flow and temperature monitoring represents the first true technological breakthrough in thermal technology in over a decade. This product was designed for heavy industrial environments including high temperature and high pressure. FCI is the only thermal... [See More]
- Throws: Double Throw
- Pipe Diameter: 0.75 to 1.00
- Meter Technology: Thermal
- Mounting: Insertion
from ERDCO Engineering Corporation
In addition to the performance benefits of the 3400 Series flow rate meter, the 3500 Series Armor-Flo ™ includes switching capabilities. Adjustable flow switches provide positive indication of flow/no flow conditions or may be positioned to establish process limits. In either application the... [See More]
- Throws: Double Throw
- Pipe Diameter: 0.50 to 12.00
- Meter Technology: Rotameter; Variable Area
- Mounting: Insertion
from Sitron
The CF12 series of thermal flow switches is designed to monitor flow status of liquids and gases and can also be used to detect level. A chain of 8 LED ’s gives the user a visual indication of the flow status of the switch. There are two red LEDs that indicate whether or not the unit has... [See More]
- Throws: Double Throw
- Mounting: In-line
- Pipe Diameter: 0.25 to 0.50
- End Fittings: In-line Threaded
from Gems Sensors & Controls
Flow Rate Settings: 0.75 GPM to 14.0 GPM. Port Size: 3/4". Primary Construction Material: Bronze. Setting Type: Adjustable. Provides accurate flow detection in water and oil with 1% repeatability. Flow settings on the adjustable version can be easily changed without disassembly. A shuttle by-pass... [See More]
- Throws: Double Throw
- Mounting: In-line
- Pipe Diameter: 0.75
- End Fittings: In-line Threaded
from Solutions with Innovation, LLC
The F002A is a precision machined, piston type flow switch that provides unsurpassed durability and reliability. Its all brass or 316 stainless steel body is rated to 1000 psig with its internal piston the only moving part. Supplied with ¼" NPT inlet and outlet ports and a ½" NPTF... [See More]
- Throws: Single Throw; Double Throw
- End Fittings: In-line Threaded
- Meter Technology: Piston
- Meter Type: Volumetric Flow Meter
from KOBOLD Instruments, Inc.
Product Features. Control of Very Small Liquid or Gas Flows. Wetted Parts - SS 1.4305, Borosilicate Glass, FKM. Proximity Switch or Reed Contact. Vertical Connection for In-Line Mounting. Flow switch types KSR and SVN operate on the same principle as a float-type flow indicator. Provided that the... [See More]
- Throws: Double Throw
- Meter Type: Volumetric Flow Meter
- Mounting: In-line
- Process Media Type: Liquid; Gas
from Clark Solutions
Use the 7000/8000 series flow meters for measuring the flow rate of liquids, gases, compressed air and steam in closed pipes. We also make indicating flow switches and flow transmitters for process indication and control. Meters feature a large easy to read analog dial with 270 degree pointer... [See More]
- Throws: Double Throw
- Pipe Diameter: 0.25 to 8.00
- Meter Technology: Orifice Plates
- Mounting: In-line
from Orange Research, Inc.
Fixed Set-Point Flow Switches. Our 30000 Series fixed set-point flow switches have factory-preset settings. The many features and the adjustability found on our other models have been designed out. Their compact size and basic profile results in low-cost switches that can be mounted where space is... [See More]
- Throws: Double Throw
- Mounting: In-line
- Pipe Diameter: 0.25
- End Fittings: In-line Threaded
from OMEGA Engineering, Inc.
FL-X Series variable-area flowrate indicators utilize fluid movement to actuate a swinging vane, which drives the scale pointer and triggers the signal switch. The corrosion-resistant construction includes no breakable tubes, and a display that is unaffected by the opacity of the fluid. These... [See More]
- Throws: Double Throw
- Pipe Diameter: 0.75
- Meter Technology: Variable Area
- Mounting: In-line
from Brooks Instrument
Features. Wide range of flow ratings. Operating temperature range 33 to 125 °F (1 °C to 52 °C). Pressure ratings up to 500 psig / 34 bar. Two accuracy levels to choose from: 2% or 1% Full Scale. Optional high and low-flow reed switch or inductive alarm, also for safe use in explosive... [See More]
- Throws: Double Throw
- Mounting: In-line
- Meter Technology: Rotameter; Variable Area
- End Fittings: In-line Threaded
from Gems Sensors & Controls
Flow Rate Settings: Liquids - Infinite Adjustment between 0.5 GPM and 20.0 GPM; Air/Gases - See chart. Port Size: 1/2" NPT. Primary Construction Material: Brass or Stainless Steel. Setting Type: Adjustable. These externally adjustable switches are ideal for protecting machine tools from coolant flow... [See More]
- Throws: Double Throw
- Pipe Diameter: 0.50
- Meter Technology: Piston
- Mounting: In-line
from Solutions with Innovation, LLC
The series F003A is an adjustable flow switch installed in line with the fluid movement to monitor flow rates from .75 to 4.0 and 2.0 to 8.0 GPM. The compact and durable design allows for ease of installation and the removable bonnet assembly provides easy access for cleaning without removal from... [See More]
- Throws: Double Throw
- End Fittings: In-line Threaded
- Meter Technology: Spring-Loaded Shuttle Magnet
- Meter Type: Volumetric Flow Meter
from Clark Solutions
Series 1100 flow switches are manufactured to exacting standards and provide accurate flow detection for most applications. Product inspection involves calibrated tools and gages traceable to National Bureau of Standards. The flow swtches are broadly used in machine tools, HVAC equipment and any... [See More]
- Throws: Double Throw
- Mounting: In-line
- Pipe Diameter: 1.38
- End Fittings: In-line Threaded
from OMEGA Engineering, Inc.
OMEGA ® in-line flowmeters offer high accuracy flow rate indication for oil or water and the ability to either control the flowrate or alarm on high or low flowrates. These units feature an SPDT switch which can be triggered at any point along the flow range. [See More]
- Throws: Double Throw
- Mounting: In-line
- Pipe Diameter: 0.50 to 0.75
- End Fittings: In-line Threaded
from Brooks Instrument
Reliable and affordable, MT3600 metal tube variable area flow meters satisfy the operational and reliability requirements for multiple industrial purge meter applications, such as metering coolants, pump seal fluids, lubricants under pressure and opaque fluids. Featuring high-temperature and... [See More]
- Throws: Double Throw
- Mounting: In-line
- Meter Technology: Rotameter; Variable Area
- End Fittings: In-line Threaded; ANSI 150# RF
from Gems Sensors & Controls
Flow Rate Settings: 0.5 GPM to 100.0 GPM. Port Size: 1" NPT to 2" NPT. Primary Construction Material: Bronze or Stainless Steel. Setting Type: Fixed. The FS-200 Series offers accurate flow detection, with 1% repeatability, over a broad range of flow settings and port sizes. Its durable construction... [See More]
- Throws: Double Throw
- Mounting: In-line
- Pipe Diameter: 1.00 to 2.00
- End Fittings: In-line Threaded
from Clark Solutions
Series 1800 flow switches are manufactured to exacting standards and provide accurate flow detection for most applications. Product inspection involves calibrated tools and gages traceable to National Bureau of Standards. Switch function involves magnet equipped PVC shuttle that is displaced at the... [See More]
- Throws: Double Throw
- Mounting: In-line
- Pipe Diameter: 1.00
- End Fittings: Socket Weld / Union
from OMEGA Engineering, Inc.
The FSW-30A flow switch is supplied with six orifices to provide 6 overlapping flow ranges from 0.12 to 8.0 GPM for water. The FSW-31 is supplied with 3 different drag discs to provide 3 overlapping ranges from 6 to 70 GPM for water. The orifices and drag discs can be changed while the switch is... [See More]
- Throws: Double Throw
- Mounting: In-line
- Pipe Diameter: 0.50 to 1.00
- End Fittings: In-line Threaded
from Gems Sensors & Controls
Flow Rate Settings: 0.1 GPM to 1.5 GPM. Port Size: 9/16" - 18 UNF. Primary Construction Material: Ryton ®. Setting Type: Fixed. More robust porting hubs offer better structural integrity. Molded cable grommet offers improved moisture protection. The FS-4 Series makes flow protection economical... [See More]
- Throws: Single Throw; Double Throw
- Pipe Diameter: 0.56
- Meter Technology: Piston
- Mounting: In-line
from Clark Solutions
Series 2100 flow switches are manufactured to exacting standards and provide accurate flow detection for most applications. Product inspection involves calibrated tools and gages traceable to National Bureau of Standards. The switches function as a magnet embedded in a spring loaded polysulfone... [See More]
- Throws: Double Throw
- Mounting: In-line
- Pipe Diameter: 0.56
- End Fittings: In-line Threaded
from OMEGA Engineering, Inc.
The FPR100 Series sensors are designed with a one-piece composite rotor, sturdy unibody construction, ceramic shafts, and superior sealing, to provide superior durability and economy. The FPR110 Series, with bright orange spinning rotors provide visual indication of flow only. The FPR120 Series... [See More]
- Throws: Double Throw
- Mounting: In-line
- Pipe Diameter: 0.25 to 0.75
- End Fittings: In-line Threaded
from Gems Sensors & Controls
Flow Rate Settings: 0.75 GPM to 10.0 GPM. Port Size: 3/4". Primary Construction Material: Bronze. Setting Type: Fixed. Provides accurate flow detection in water and oil with 1% repeatability. Flow settings on the adjustable version can be easily changed without disassembly. A shuttle by-pass vane... [See More]
- Throws: Double Throw
- Mounting: In-line
- Pipe Diameter: 0.75
- End Fittings: In-line Threaded
from Clark Solutions
The flow meter and switch model DS08 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. An externally mounted pointer indicator is magnetically coupled to the float... [See More]
- Throws: Double Throw
- Pipe Diameter: 0.25 to 1.00
- Meter Technology: Rotameter; Variable Area
- Mounting: In-line
from OMEGA Engineering, Inc.
The FPR-200 series flowrate sensor integrates rugged tangential turbine technology with a precision digital-to-analog conversion circuit hermetically encapsulated within the body of the sensor. The flow sensor is ideal for measuring flowrates in cooling circuits, HVAC systems and batching... [See More]
- Throws: Double Throw
- Pipe Diameter: 0.50 to 1.00
- Meter Technology: Turbine
- Mounting: In-line
from Gems Sensors & Controls
Engineered for Positive Liquid Flow Detection at Pressures to 2000 psig (137.9 bar). Unique, Patented Cam Design Assures Low Pressure Drop and Does not Require Bellows, Seals, or Mechanical Linkages. Minimum In-Line Restriction; Paddle Pivots to Move Out of Liquid Path with Increasing Flow. Pipe... [See More]
- Throws: Double Throw
- Mounting: Insertion
- Pipe Diameter: 0.50 to 1.00
- End Fittings: In-line Threaded
from OMEGA Engineering, Inc.
The FL-W Series of water flow monitors can be used with flows from 1 gph up to 90 gpm. These flowmeters utilize the fluid ’s movement to actuate a swinging vane (or piston), which drives the scale pointer and triggers the signal switch. SPECIFICATIONS: Signal Switch: 3-Wire SPDT, 15 A @ 125... [See More]
- Throws: Double Throw
- Pipe Diameter: 0.75 to 2.00
- Meter Technology: Piston
- Mounting: In-line
from Gems Sensors & Controls
Flow Rate Settings: 0.1 GPM to 1.0 GPM. Port Size: 1/4" NPT. Primary Construction Material: Brass. Setting Type: Fixed. A unique, patented piston design assures accuracy within 20% over a full range of viscosities - from 40 to 1000 SSU. Ideal for use in applications where liquids of different... [See More]
- Throws: Double Throw
- Pipe Diameter: 0.25
- Meter Technology: Piston
- Mounting: In-line
from OMEGA Engineering, Inc.
FSW-20 series paddle-type switches easily install into pipes ranging in size from 1 ¼" on up using an ordinary pipe tee or threaded weld coupling. The paddle pivots to move out of the liquid ’s path with increasing flow, thereby activating the switch. The paddle is easily cut for field... [See More]
- Throws: Double Throw
- Pipe Diameter: 1.25 to ?
- Meter Technology: Paddlewheel
- Mounting: Insertion