Pressure reducing valve (for water / liquid / door-to-door water supply), constant flow valve, water hammer preventer RDB-33FN type pressure reducing valve with bypass (for water / hot water)
It inherits the reliability and ease of use of the water pressure reducing valve [calm] series.
Major features
- Uses a ball-type switching valve system that facilitates function selection operations.
- Bypass function enables cleaning and water flow in the pipe at the initial stage of water flow.
- Withstand voltage test of piping is possible with the pressure reducing valve with bypass attached.
- Maintenance of the pressure reducing valve is possible while passing water.
Water Supply Law Performance Standard Certification Registered Product (E-576) Pressure Pressure Performance Leaching Performance Durability Performance
specification
| Product code | RDB33FN-FL | RDB33FN-FH |
|---|---|---|
| Valve type | Pressure reducing valve | Pressure reducing valve |
| Nominal diameter | 20-100 (3/4-4) | 20-100 (3/4-4) |
| Applicable fluid | Water / hot water | Water / hot water |
| Fluid temperature | 5 to 90 ° C | 5 to 90 ° C |
| Primary side applied pressure | 1.0MPa or less | 1.0MPa or less |
| Secondary adjustment pressure range (set pressure) | 0.05-0.35MPa | 0.3-0.7MPa |
| Maximum decompression ratio | 10: 1 | 10: 1 |
| Minimum differential pressure before and after the valve | 0.05MPa | 0.05MPa |
| Allowable leakage amount | None (visual pressure gauge) | None (visual pressure gauge) |
| End connection | Nominal diameter 20/25: JIS 10K loose flange Nominal diameter 32-100: JIS 10K FF flange | Nominal diameter 20/25: JIS 10K loose flange Nominal diameter 32-100: JIS 10K FF flange |
| Mounting posture | Horizontal / vertical freedomWhen installing in vertical piping, leave a large maintenance space. | Horizontal / vertical freedomWhen installing in vertical piping, leave a large maintenance space. |
| Material body | CAC406 | CAC406 |
| Material diaphragm | NBR | NBR |
| Material Flange | Nominal diameter 20/25: SUS304, Nominal diameter 32-100: CAC406 | Nominal diameter 20/25: SUS304, Nominal diameter 32-100: CAC406 |
| Material disc | NBR | NBR |
| Material parts | CAC406 | CAC406 |
| Material Spring case | Nominal diameter 20-50: ADC, Nominal diameter 65-100: FC | Nominal diameter 20-50: ADC, Nominal diameter 65-100: FC |
- We also manufacture pressure gauge attachments. (The maximum scale of the pressure gauge is 1.6MPa on the primary side and the adjustment pressure range L (0.6MPa) and H (1.6MPa) on the secondary side.)
Download materials
Frequently Asked Questions and Explanations
Please tell me how to adjust the pressure. (There is a video in the answer details)
Please see the video of the pressure adjustment method from the answer details.
What is the useful life (the number of years recommended for replacement)?
The useful life of the main unit is about 8 years, but it depends on the usage conditions and environment.
Is it possible to reduce the hydrostatic pressure (without flowing water)?
When no water is flowing (flow rate 0), the valve is closed and the secondary side holds the set pressure.
What happens if the minimum flow rate or minimum differential pressure is exceeded?
If the conditions are outside the specified range, control will be lost and operation will become unstable.
Inquiries about this product
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