Description
OH-DPD is a series of dry pipe units for installation in wet pipe systems, where the pressurized water pipes are located in frost free area, but nozzles must also be installed in spaces where temperatures below 0⁰C may occur (for example balconies, freezers, garages etc).
The OH-DPD solution consists of a ½” wet pipe connection with a water stop-valve, on which a dry pipe is connected. At the end of the dry-pipe an OH Low pressure water mist water mist nozzle is connected. When the OH Low Pressure Water Mist nozzle activates, the water stop-valve automatically opens to allow water to flow from the wet pipe system through the dry pipe and out through the OH Low Pressure Water mist nozzle.
OH-DPD solution is available with all OH-series automatic water mist nozzles. Available lenghts are 150 mm, 300 mm, 450 mm, 600 mm and 750 mm.
Technical specifications
Pressure: 4-16 bar
K-value: Depending on the nozzle (see table below)
Measurements and weights
| Model | L (mm) | L1 (mm) | L2 (mm) | Weight (kg) |
| OH-DPD-150 | 197 | 117 | 150 | 0,70 |
| OH-DPD-300 | 347 | 267 | 300 | 1,15 |
| OH-DPD-450 | 497 | 417 | 450 | 1,50 |
| OH-DPD-600 | 647 | 567 | 600 | 1,85 |
| OH-DPD-750 | 797 | 717 | 750 | 2,20 |
Nozzle Data
| Model | K-value (metric) | Min.pressure (bar) | Max.height (m) | Approval |
| OH-VSO | 16,7 | 8 | 5,0 | FM |
| OH-OS | 16,5 | 10,5 | 5,0 | FM |
| OH-L2 | 14,5 | 6 | 5,0 | DnV-GL |
| OH-L1 | 13,5 | 6 | 2,5 | DnV-GL |
| OH-L0 | 7 | 6 | 2,5 | DnV-GL |
| OH-CO | 15,5 | 6 | 2,5 | DnV-GL |
| OH-SWC | 23 | 6 | 2,5 | DnV-GL |
| OH-SW | 12,5 | 6 | 3,0 | DnV-GL |
| OH-PX1(Car Park) | 23 | 6 | 5,0 | DnV-GL |
| OH-PX1(Storage) | 23 | 9 | 2,5 | DnV-GL |
| OH-CA | 10 | 6 | 2,5 | DnV-GL |
| OH-CA1 | 13 | 6 | 2,5 | DnV-GL |