Description
Plastic Threaded Rotameter for Water – 2000 to 10000 LPH
The Plastic Threaded Rotameter for Water, Range 2000 to 10000 LPH is an economical and reliable variable-area flow measurement instrument designed for continuous local monitoring of water flow in industrial, commercial, process, utility, and water-treatment applications. With a broad flow range of 2000 to 10000 Litres Per Hour (LPH), this model is suitable for higher-capacity water-flow applications where operators require a simple, direct, and easily visible flow indication.
The rotameter is specifically designed for water with a specific gravity of 1 and features a transparent polycarbonate body, SS 316L float, and ABS end construction. This combination provides a lightweight and practical instrument that allows operators to visually observe the float position while the system is operating.
The instrument is supplied with 1 1/2″ BSP (M) threaded connections at both the top and bottom, making it suitable for inline installation in compatible piping systems. The standard flow arrangement is bottom inlet and top outlet, allowing water to flow upward through the measuring section.
Operating on the proven variable-area principle, the float moves vertically according to changes in water flow. When the flow increases, the float rises; when the flow decreases, the float moves downward. The operator can read the corresponding flow rate from the graduated scale.
The rotameter offers a specified accuracy of 2% of full scale, maximum operating temperature of 60°C, and maximum operating pressure of 5 kg/cm², making it suitable for a wide range of general-purpose water-flow monitoring requirements within its rated operating conditions.
Variable-Area Flow Measurement Principle
The Plastic Threaded Rotameter operates using the variable-area flow measurement principle.
Water enters through the bottom connection and flows upward through the tapered measuring passage. The upward movement of water causes the SS 316L float to rise. As the flow rate changes, the float changes position until it reaches a stable point corresponding to the flow.
The operator observes the float through the transparent body and reads the flow rate against the calibrated scale.
This simple mechanical principle eliminates the need for an external electrical supply for basic local flow indication.
Advantages of the operating principle include:
- Direct visual flow measurement
- Continuous indication
- No external power required
- Simple mechanical operation
- Easy monitoring
- Low maintenance
- Quick visual inspection
- Economical installation
- Straightforward troubleshooting
This makes the instrument especially useful for applications where local flow indication is required without the complexity of an electronic flow transmitter.
2000 to 10000 LPH Flow Range
This model is designed for a water-flow range of:
2000 to 10000 LPH
The high-capacity measuring range makes it suitable for larger water-flow circuits, process systems, and utility applications where a higher flow rate needs to be monitored continuously.
Potential applications include:
- Water treatment plants
- RO and water purification systems
- Cooling-water systems
- Industrial filtration systems
- Process-water circulation
- Utility-water systems
- Industrial machinery
- Water distribution systems
- Industrial washing systems
- Process equipment
- General-purpose water-flow monitoring
The instrument should be selected according to the actual process flow and installed within the specified pressure and temperature limits.
Transparent Polycarbonate Body
The measuring body is constructed from polycarbonate, providing a transparent flow section.
The transparent body allows the operator to see the SS 316L float directly during operation. This provides an immediate visual indication of the current flow condition without requiring a digital display.
The transparent construction is useful for:
- Confirming the presence of flow
- Observing flow changes
- Monitoring float movement
- Identifying unstable flow
- Supporting routine inspection
- Detecting abnormal flow conditions
Polycarbonate construction also contributes to the lightweight and economical design of the instrument.
The body should always be operated within the specified maximum temperature and pressure limits.
SS 316L Float
The instrument incorporates an SS 316L float as its primary moving measurement element.
The float responds to the upward force created by the flowing water. Its vertical position changes according to variations in flow rate.
SS 316L is commonly used for industrial instrumentation components because of its corrosion-resistant characteristics and suitability for a range of compatible process environments.
The SS 316L float provides a durable and visible element for direct flow indication.
1 1/2″ BSP (M) Threaded Connections
The rotameter is supplied with:
1 1/2″ BSP (M) connections at the top and bottom
These connections are designed for inline installation into compatible piping systems.
The standard flow arrangement is:
Bottom Inlet → Measuring Section → Top Outlet
Correct installation orientation is important because the float is designed to move vertically under the influence of gravity and upward fluid flow.
Before installation, the piping arrangement should be checked to ensure compatibility with the 1 1/2″ BSP male threaded connections.
Designed for Water – Specific Gravity 1
The instrument is specified for:
Water – Specific Gravity 1
The flow scale is intended for water with the specified density characteristics. If another liquid with substantially different density or viscosity is used, the indicated reading may not correspond directly to the calibrated water-flow value.
Therefore, the rotameter should primarily be used for its intended water application unless suitable correction or application-specific calibration is available.
Maximum Operating Temperature – 60°C
The maximum specified operating temperature is:
60°C
This makes the rotameter suitable for many normal-temperature and moderately warm water applications.
Before installation, the process temperature should be checked to ensure it remains within the specified operating limit.
The instrument should not be operated above its rated temperature.
Maximum Operating Pressure – 5 kg/cm²
The maximum specified operating pressure is:
5 kg/cm²
The system should be evaluated to ensure that normal operating pressure remains within the specified limit.
Potential pressure surges and fluctuations should also be considered during system design.
The piping should be properly aligned and supported to prevent excessive mechanical stress on the rotameter and its threaded connections.
2% Full-Scale Accuracy
The specified accuracy is:
2% of Full Scale
This makes the instrument suitable for general-purpose water-flow monitoring where a dependable local indication is required.
The rotameter is particularly useful for applications where operators need to confirm that water flow is present and maintained within an acceptable operating range.
For applications requiring highly precise or certified flow measurement, the specified accuracy should be evaluated against the individual application requirements.
Tamper-Proof Scale Sticker
The rotameter is supplied with a tamper-proof scale sticker.
The scale is graduated in:
LPH / LPM
The operator can observe the float position through the transparent body and compare it with the appropriate scale marking.
The graduated scale provides a convenient local reference for routine water-flow monitoring.
For consistent measurement, the operator should allow the flow to stabilize before taking the reading.
Dimensions
The approximate dimensions of this model are:
400 mm Height × 120 mm Width
The dimensions provide a suitable measuring section for the higher 2000–10000 LPH flow range.
Adequate clearance should be provided around the instrument during installation to allow the operator to easily observe the float and scale.
Applications
1. Water Treatment Plants
The rotameter can be used for monitoring water flow through compatible treatment, filtration, and circulation systems.
2. RO and Water Purification Systems
It can provide local visual flow indication in suitable reverse-osmosis and water-purification equipment.
3. Cooling-Water Circuits
Industrial machinery often depends on adequate cooling-water flow. The rotameter can be installed on compatible cooling circuits to provide continuous local monitoring.
4. Filtration Equipment
The instrument can be used to observe water flow through suitable filtration systems and process-water equipment.
5. Process-Water Systems
The 2000–10000 LPH range makes this model suitable for a variety of higher-flow process-water applications.
6. Utility-Water Lines
The instrument can provide simple visual monitoring of water circulation in industrial utility systems.
7. Industrial Machinery
It can be used for compatible cooling, cleaning, circulation, and process-water applications associated with industrial equipment.
Benefits of Using the Plastic Threaded Rotameter
The main benefit of this rotameter is its combination of simple operation and practical flow visibility. Operators can monitor water flow directly without depending on electrical instrumentation or complicated programming.
The transparent body provides immediate visibility of the float, while the graduated scale provides a convenient flow reference.
Other important benefits include:
- Easy-to-understand operation
- Continuous local indication
- Compact mechanical measuring arrangement
- Lightweight construction
- Simple installation
- Low maintenance
- Economical instrumentation
- Suitable for higher water-flow applications
This makes the product useful for OEM equipment manufacturers, maintenance departments, process engineers, water-treatment operators, and industrial users.
Installation Guidelines
For proper operation, the rotameter should be installed vertically, with the water inlet at the bottom and outlet at the top.
Before commissioning, verify the following:
- The piping system is compatible with the 1 1/2″ BSP (M) connections.
- The rotameter is installed in the correct vertical orientation.
- Flow direction is bottom to top.
- Operating flow remains within 2000–10000 LPH.
- Operating pressure remains below 5 kg/cm².
- Water temperature remains below 60°C.
- The piping is correctly aligned and adequately supported.
- The float can move freely within the measuring section.
- Excessive vibration and pressure surges are avoided.
- The flow is stabilized before taking a reading.
Maintenance
The simple construction of the rotameter makes routine inspection straightforward. Users should periodically inspect the transparent body, float movement, scale, threaded connections, and general physical condition.
If deposits or contaminants affect the movement of the float, the instrument should be safely isolated from the process before cleaning or servicing.
Routine inspection can help identify abnormal float movement, deposits, damage, or connection problems and can support reliable long-term operation.
Conclusion
The Plastic Threaded Rotameter for Water, 2000 to 10000 LPH is a practical and economical solution for continuous local water-flow monitoring in higher-capacity applications. Its variable-area operating principle, transparent polycarbonate body, SS 316L float, ABS end construction, and 1 1/2″ BSP (M) threaded connections provide a simple and effective method of measuring and observing water flow.
With a 2000–10000 LPH flow range, 2% full-scale accuracy, maximum operating temperature of 60°C, and maximum operating pressure of 5 kg/cm², the instrument is suitable for compatible water-treatment, RO, cooling, filtration, process, and utility applications.
For users requiring a simple, visible, economical, and low-maintenance water-flow measurement solution, this Plastic Threaded Rotameter provides an effective option for industrial process and utility applications.
Japsin Instrumentation – Since 1974
Rishan Kapoor –
Highly recommended
Gautham Iyer –
Quality, reliability, and great value!
Prisha Patel –
Nice Product