Pressure reducing valve (for water / liquid / door-to-door water supply), constant flow valve, water hammer preventer RD-17A type pressure reducing valve (for water / liquid)
By adopting a pressure balance structure for the valve body, the fluctuation of the secondary side pressure due to the change of the primary side pressure is small.
specification
Product code | RD17A-C □The symbol of the secondary adjustment pressure range is entered in □. |
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Valve type | Pressure reducing valve |
Nominal diameter | 20-150 (3/4-6) |
Applicable fluid | Water / liquid |
Fluid temperature | We also manufacture 5 to 80 ° C (5 to 100 ° C for nominal diameters of 50 or less.Oils are 100 ℃ or less, and hot water is 90 ℃ or less. ) |
Fluid viscosity | 700cSt or less |
Primary side applied pressure | 2.7MPa or less |
Secondary adjustment pressure range (set pressure) | L: 0.2 to 0.35MPa H: 0.3 to 0.7MPa See applicable pressure selection diagram |
Minimum differential pressure before and after the valve | 0.05MPa |
Deadline boost | 0.05MPa or less |
Allowable leakage amount | None (visual pressure gauge) |
offset | 0.2-0.35MPa Spring: Within 0.15MPa 0.3-0.7MPa Spring: Within 0.2MPa |
End connection | JIS 10, 16, 20, 30K RF flangeWe also manufacture JIS 10, 16, 20K FF flanges and ASME / JPI class 150 flanges. |
Mounting posture | Upright mounting on horizontal piping |
Material body | SCPHWe also manufacture the wetted parts made of SUS. |
Material Valve body | SUS |
Material Valve seat | SUS |
Material disc | NBR |
- The material of the spring case differs from that of S25C, SGP, and STPG depending on the nominal diameter.
- We also manufacture the RD-17N type (nominal diameter 100: secondary adjustment pressure range: 0.7 to 1.05 MPa) that conforms to the performance standards of the Waterworks Law.
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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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