Pressure reducing valve (for water / liquid / door-to-door water supply), constant flow valve, water hammer preventer RD-20FN type pressure reducing valve (for water / liquid, air / gas)
Major features
- Stainless steel and synthetic rubber are used for the wetted parts and spring case, so they have excellent corrosion resistance.
- By examining the flow path and adopting square springs, etc., the size and weight have been significantly reduced.
- The mounting posture is free.
- Easy to maintain.
- It can be used for both liquid and gas at a primary pressure of 2.0 MPa.
Water Supply Law Performance Standard Certification Registered Product (E-442) Pressure Pressure Performance Leaching Performance Durability Performance
specification
Product code | RD20FN-D □The symbol of the secondary adjustment pressure range is entered in □. |
---|---|
Valve type | Pressure reducing valve |
Nominal diameter | 15-25 (1/2-1) |
Applicable fluid | Water / liquid / airWhen 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.・ Gas (thing that does not corrode materials) |
Fluid temperature | 5-60 ℃If it is a liquid and the fluid temperature is 60 to 90 ° C, please contact us. |
Fluid viscosity | Liquid: 800cSt or less |
Primary side applied pressure | 2.0MPa or less |
Secondary adjustment pressure range (set pressure) | L: 0.02 to 0.12MPa, M: 0.1 to 0.3MPa, H: 0.25 to 0.5MPa |
Maximum decompression ratio | Water / Liquid 10: 1 Air / Gas 20: 1 |
Minimum differential pressure before and after the valve | 0.05MPa |
Allowable leakage amount | None (visual pressure gauge) |
End connection | JIS 10, 20K RF flangeWe also manufacture JIS 10, 20K FF flanges, ASME / JPI class 150, and 300 flanges. |
Mounting posture | Horizontal / vertical freedom |
Material body | SCS |
Material diaphragm | NBR |
Material disc | NBR |
- For the RD-20, 20F type, we also manufacture the RD-20T, 20FT type, which is compatible with temporary cleaning steam (maximum operating temperature of 130 ° C) in beer and drinking water factories. (The applied pressure on the primary side is 1.0 MPa or less, and the maximum decompression ratio is 10: 1.)
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Frequently Asked Questions and Explanations
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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