Double Throw (DT) Volumetric Gas Flow Switches
Last Updated: April 1, 2025
Description
Double Throw (DT) Volumetric Gas Flow Switches are devices designed to monitor and control the flow of gas within a system. They are capable of switching between two states, allowing them to manage the flow of gas effectively by either opening or closing the circuit based on the flow conditions.
Working Principle
DT Volumetric Gas Flow Switches operate by detecting changes in the flow of gas through a system. They typically use either solid-state or electromechanical switches to sense the flow rate. The double throw mechanism allows the switch to toggle between two positions, providing a reliable method for controlling gas flow. This capability is particularly useful in systems where precise flow management is critical, as it ensures that the gas flow is maintained within desired parameters.
Applications
These switches are commonly used in applications where precise gas flow control is essential. For example, they can be employed in natural gas fractionation facilities to monitor relief valve leaks, ensuring that any deviations in flow are quickly detected and addressed . They are also suitable for use in various industrial processes that require accurate gas flow monitoring and control.
Advantages over other Volumetric Gas Flow Switches
DT Volumetric Gas Flow Switches offer several advantages over other types of flow switches. Their ability to switch between two states provides greater flexibility and control in managing gas flow. Additionally, the use of solid-state or electromechanical switches enhances their reliability and reduces the likelihood of false alarms, which can be a common issue with other technologies such as differential pressure or vane type switches .
Limitations
One limitation of DT Volumetric Gas Flow Switches is that they may not be suitable for all applications, particularly those requiring the detection of very low gas flow velocities. In such cases, other technologies like thermal flow switches might be more appropriate due to their sensitivity to low flow conditions .
Considerations
When selecting DT Volumetric Gas Flow Switches, several factors should be considered. Initial costs can vary depending on the complexity and specifications of the switch. Operating expenses are generally low, but it's important to consider the durability and maintenance requirements of the switch. Solid-state switches, for example, tend to have a longer lifespan and lower maintenance costs compared to electromechanical switches, which may require more frequent servicing due to their mechanical components . Accuracy is another critical factor, as it directly impacts the effectiveness of the flow control system.
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 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 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 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 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
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 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
- Process Media Type: Liquid; Gas
- Mounting: In-line
- Operating Pressure: 230