Description
The Paddle Type Water Flow Switch (10 Bar) is an essential protection device designed to continuously monitor the flow of water and non-corrosive liquids across residential, commercial, and industrial piping networks. Operating via a flexible stainless steel paddle inserted directly into the fluid stream, the switch translates flow movement into mechanical force to trigger an internal SPDT snap-action microswitch. When liquid flow drops below or exceeds the designated setpoint, the switch instantly makes or breaks electrical contact to trigger alarms, start auxiliary pumps, or shut down HVAC chillers. Enclosed in a heavy-duty protective casing with metal alloy connection threads, this switch provides economical, field-adjustable protection against flow loss.
Technical Specifications
| Specification | Details |
| Product Name | Paddle Type Water Flow Switch |
| Sensing Mechanism | Flexible Stainless Steel Paddle Assembly |
| Maximum Fluid Pressure | 10 Bar (1.0 to 1.5 MPa) |
| Fluid Temperature Range | 0°C to +120°C (Min. 4°C / Max. 120°C) |
| Ambient Operating Temperature | Max 120°C |
| Connection Thread Sizes | Standard 1″ NPT / BSPT (Adapts from 1″ up to 8″ Pipe Lines) |
| Contact Type | Single Pole Double Throw (SPDT) Snap-Action Microswitch |
| Electrical Rating | 15(8)A, 220V AC |
| Housing & Thread Materials | Coated Sheet Metal Cover, Forged Metal Alloy Threaded Connector |
| Internal & Paddle Materials | Phosphor Bronze Bellows & Stainless Steel Paddles |
| Setpoint Adjustment | Internal Range Screw under Housing Cover |
| Product Condition | New |
Flow Rate Setting Reference Sheet
| Pipe Connection Size | Min. Flow Increase (m³/h) | Min. Flow Decrease (m³/h) | Max. Flow Increase (m³/h) | Max. Flow Decrease (m³/h) |
| 1 Inch | 1.0 | 0.6 | 2.0 | 1.9 |
| 1-1/4 Inch | 1.3 | 0.8 | 3.0 | 2.8 |
| 1-1/2 Inch | 1.7 | 1.1 | 4.4 | 4.1 |
| 2 Inch | 3.1 | 2.2 | 6.6 | 6.1 |
| 2-1/2 Inch | 4.1 | 2.8 | 7.8 | 7.3 |
| 3 Inch | 6.2 | 4.3 | 12.0 | 11.4 |
| 4 Inch | 15.0 | 11.0 | 29.0 | 28.0 |
Key Features
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Automatic Microswitch Protection: Rapid SPDT switching mechanism delivers clean contact breaks to safeguard equipment instantly during low-flow conditions.
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Fully Adjustable Flow Setpoints: Internal calibration screw located underneath the protective cover allows fine-tuning to exact system flow requirements.
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Corrosion-Resistant Components: Constructed with a forged metal alloy threaded body, phosphor bronze internal bellows, and stainless steel paddles for long service life in water lines.
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Versatile Pipe Size Compatibility: Trim-to-size stainless steel paddle set allows mounting in pipelines ranging from 1″ up to 8″ in diameter.
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Waterproof Casing: Sealed industrial housing protects electrical connections from moisture and condensation in cold water environments.
Supported Applications
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HVAC & Commercial Chillers: Evaporator freeze protection and water flow verification in water chillers and cooling towers.
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Hydronic & Booster Pump Control: Automatic pump shut-off prevention during water supply failure.
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Industrial Liquid Lines: Monitoring non-corrosive fluid movement in heat exchangers, boilers, and industrial cooling loops.
Benefits
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Prevents costly chiller barrel freeze-ups and dry-run pump impeller failure.
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Simplifies maintenance with a straightforward mechanical paddle design that requires no external power to sense flow.
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Easy on-site customization with multi-length paddles and top-mounted adjustment screws.
Package Includes
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1 x Paddle Type Water Flow Switch Unit
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1 x Stainless Steel Trim-to-Length Paddle Set
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1 x Installation Instruction Sheet
Important Buyer Verification Notes
Notice for Technicians & Contractors: Ensure the flow arrow marked on the metal alloy connector body matches the direction of fluid movement in the pipe. Always cut or select the paddle length corresponding to your exact pipe diameter to prevent internal pipe wall contact.
Why Buy From Al Ramiz
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Genuine Quality Parts: Dependable, field-tested flow controls, pressure switches, and HVAC accessories.
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UAE Stock & Local Inventory: Fast order processing and local dispatch across the UAE.
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Technical Support: Professional assistance with sizing, wiring schematics, and flow rate calibration.
Frequently Asked Questions (FAQs)
How does a paddle type water flow switch work?
When fluid flows through the pipe, it pushes against a flexible stainless steel paddle. This movement moves an internal lever mechanism that trips a microswitch when the flow reaches or drops below a set threshold.
Can this flow switch be used on different pipe sizes?
Yes, the switch comes with a set of stainless steel paddles that can be trimmed or selected to fit pipe diameters ranging from 1″ up to 8″.
Is the flow trip setpoint adjustable on-site?
Yes, you can adjust the flow setpoint by turning the calibration screw located directly under the protective top casing.
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