Pressure reducing valve (for water / liquid / door-to-door water supply), constant flow valve, water hammer preventer RD-31N type pressure reducing valve
[Quiet], which combines the technologies of our water pressure reducing valve, which has already received high praise, and pursues controllability, reliability, and ease of use, is a source of rust, especially from the flow path including the pipe joint. Is lost. [Quiet], which is becoming more and more popular as a countermeasure against red water, is used for building equipment, housing equipment, factory equipment, boiler water supply, etc.
- Where to use
- Building equipmentFactory equipment
Major features
- Calm flow red water countermeasures: Main body bronze + pipe end core prevents red water.
- It is a low noise design.
- It is about 50% smaller and lighter than the conventional FC product.
- Even if the diaphragm is damaged, water will not leak to the outside.
- It has a built-in strainer. (Nominal diameter 50 or less)
Water Supply Law Performance Standard Certification Registered Product (E-654) Pressure -Resistant Leach Durability
specification
| Product code | RD31N-F □The symbol of the secondary adjustment pressure range is entered in □. |
|---|---|
| Valve type | Pressure reducing valve |
| type | For 1.0MPa or less |
| Nominal diameter | 15-50 (1/2-2) |
| Applicable fluid | Water / hot water / (air)When used in a dry air pneumatic system with an oil-free compressor (turbo compressor or positive displacement compressor (rotary oil-free type)), rubber parts may deteriorate significantly in a short time (ozone cracks occur). ). Please contact us if you want to install it in such a place.・ Inert gasIf the applicable fluid is air or an inert gas, the nominal diameter is up to 100. ) |
| Fluid temperature | 5 to 90 ° C (5 to 40 ° C when using a tube end core) |
| Primary side applied pressure | 1.0MPa or less |
| Secondary adjustment pressure range (set pressure) | L: 0.05~0.35MPa H: 0.3~0.7MPa |
| Maximum decompression ratio | 10: 1 |
| Minimum differential pressure before and after the valve | 0.05MPa |
| Allowable leakage amount | None (visual pressure gauge) |
| End connection | JIS Rc screwWe also manufacture products with a built-in tube end core (nominal diameter of 50 or less). |
| Mounting posture | Horizontal / vertical (excluding strainer cap upward)When installing in vertical piping, keep the nominal diameter up to 100 and allow a large maintenance space. (For nominal diameters of 125 or more, install upright on horizontal pipes.) |
| strainer | Equivalent to 40 mesh (nominal diameter 50 or less) |
| Material body | CAC406 |
| Material diaphragm | NBR |
| Material disc | NBR |
| Material parts | CAC406 |
| Material Spring case | ADC |
- We also manufacture a pressure gauge attachment only on the secondary side. (The maximum scale of the pressure gauge is the secondary adjustment pressure range L (0.6MPa) and H (1.6MPa).)
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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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