Pressure reducing valve (for steam, for air / gas) RD-4B type pressure reducing valve (for air / gas)
specification
| Product code | RD4B-N □The symbol of the secondary adjustment pressure range is entered in □. |
|---|---|
| Nominal diameter | 15/20/25 (1/2/3/4/1) |
| Applicable fluid | Air / gas |
| Fluid temperature | 5-80 ℃ |
| Primary side applied pressure | 5.0MPa or less |
| Secondary adjustment pressure range | L: 0.5-1.0, M: 1.0-1.5, H: 1.5-2.0, S: 2.0-3.0MPa |
| Maximum decompression ratio | 10: 1 |
| Minimum differential pressure before and after the valve | 0.05MPa |
| Deadline boost | Set pressure x 10% or less |
| Allowable leakage amount | Nominal diameter 15:30 mL / min or less (standard state), nominal diameter 20: 40 mL / min or less (standard state), nominal diameter 25: 50 mL / min or less (standard state) |
| End connection | JIS 16, 20, 30, 40, 63K RF flangeWe also manufacture JIS 10K FF / RF, JIS 16, 20, 30, 40, 63K FF flanges. |
| Material body | S25C |
| Material Valve body | SUS |
| Material Valve seat | SUS |
| Material diaphragm | C5212P |
| Material disc | PCTFE |
| Mounting posture | Upright mounting on horizontal piping |
| Cv value | 0.4For the secondary adjustment pressure range S: 2.0 to 3.0 MPa, it is necessary to correct the Cv value, so please contact us. |
| Mass (kg) | Nominal diameter 15: 22, Nominal diameter 20: 23, Nominal diameter 25: 24The mass of RD-4B type is for flange standard JIS 63K RF. |
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Frequently Asked Questions and Explanations
Is there a leak in the steam pressure reducing valve?
The allowable leakage amount is stated in the specifications of each product.
Does the fluid flow without pressure adjustment?
It doesn't flow. It will flow normally only after adjusting the pressure.
How should I perform maintenance and inspection of the steam pressure reducing valve?
We perform regular maintenance once a year as a guide. Please refer to the instruction manual for details.
Inquiries about this product
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