Piston flow switches, reed switch contact, inlet and outlet 3/4” BSPP male
Main applications: Product developed for electrical or gas instantaneous water heaters. 3/4 “ BSPP male water inlet and outlet. Mandatory vertical mounting, with water inlet from the bottom. Built-in over-pressure valve
| Flow sensing | |
|---|---|
| Main housing material | |
| Paddle material | |
| Mounting position | |
| Mounting type | |
| Voltage | |
| Electrical rating | |
| Ingress protection | |
| Electrical connection type | |
| Electrical contact close at (L/min) | |
| Maximum flow detection (L/min) | |
| Minimum flow detection (L/min) | |
| Nominal pressure at 20°C | |
| Max operating temperature (°C) | |
| Liquids temperature range (°C) |
| Size and pressure | Flow sensing:
Magnetic piston |
Mounting:
3/4” male inlet and |
Contact:
Reed switch, close on |
Electrical rating | Mounting position | Type |
| PN10 |  |
 |
 |
 |
 |
R36 |
| DN20 |
Dimensions
|
Main applications: Product developed for electrical or gas instantaneous water heaters. 3/4 “ BSPP male water inlet and outlet. Mandatory vertical mounting, with water inlet from the bottom. Built-in over-pressure valve
Functional principle: Magnetic piston mounted in line with the flow and activating a reed switch through the wall. The return of the piston is by made by gravity. No seal or liquid can pass between the piping system and the electrical contact. Suitable for potable water. Must not be used for water containing magnetic particles or high viscosity liquids, which block the movement of the piston.
Adjustment: Can be factory set by adjusting the piston diameter and piston weight
Body material: PPO compatible with drinking water.
Piston: PPO
Electrical rating: Max 1A, Max 70W, Max 250V, resistive load. Use on inductive circuits reduces electrical rating. We recommend to protect the reed switch with contact protec- tion device when used in inductive loads
Electric contact type: Normally open, closes by flow rise
Liquids compatibility: For use with clean water and liquids without magnetic particles and without chemical incompatibility with PPO Nominal pressure at 20°C: 1MPa (PN10)
Flow detection set point factory setting limits:
Close by flow rise: 2,4 to 8 L/min
Open by flow decrease: About 0.4 to 0.5L/min lower than close value
Nominal diameter: DN20
Mandatory mounting position: on vertical pipes, upstream flow
Water pipe connection: Water inlet and outlet: 3/4” BSPP male fitting (Needs gasket). Recommended torque: 7N.m
Liquids temperature range: 5 to 80°C
Ambient temperature range: 5 to 50°C
Overpressure valve calibration value: 1.5 MPa +0.5, -0
Ingress protection: IP65
Electrical connection: 2 x AWG24 wires (0.2mm²), PVC insulation, T80°, standard length 300 mm.
Options (MOQ apply):
- Wires with connector or terminals,
- Other wire lengths,
- Other calibration values
- Upside water inlet,(by adding an internal stainless steel piston spring)
Main references (with 300 mm wires)
| References | Close on flow rise (L/min) | Open on flow decrease (L/min) |
| R36B630240150330 | 2,4±0,3 | 1,8±0,3 |
| R36B630300150330 | 3±0,3 | 2.6±0,3 |
| R36B630350150330 | 3,5±0,3 | 2.9±0,3 |
Other calibration on request
Technical specifications sheet
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