- Compact back pressure valve for small flow rates.
- The wetted parts are made of brass and stainless steel, preventing galvanic corrosion.
- The valve body is fitted with synthetic rubber, ensuring excellent sealing performance when the valve is closed.
- Options for internal and external leakage detection are available.
- Can be installed on both horizontal and vertical piping.
Specifications and Materials
| Fluid | Primary Side Pressure Setting Range (MPa) | Temperature (°C) | Main Component Materials | Pipe Connection | |||
|---|---|---|---|---|---|---|---|
| Valve Box | Intermediate Cylinder | Spring Protection Cylinder | Valve Body / Diaphragm | ||||
| Water, Oil, and Other Non-Corrosive Liquids | 0.01–0.06 | 0–80 | Brass | Brass | Cast Iron | Synthetic Rubber | JIS Rc Threaded |
| 0.05–0.25 | 0–80 | Stainless Steel Cast | Stainless Steel | Cast Iron | Synthetic Rubber | JIS Rc Threaded | |
| 0.2–0.65 | 0–80 | Stainless Steel Cast | Stainless Steel | Cast Iron | Synthetic Rubber | Flange JIS 20K Flat Seat | |
| 0.6–1.2 | 0–80 | Stainless Steel Cast | Stainless Steel | Cast Iron | Synthetic Rubber | Flange JIS 20K Flat Seat | |
| 1.0–2.0 | 0–80 | Stainless Steel Cast | Stainless Steel | Cast Iron | Synthetic Rubber | Flange JIS 20K Flat Seat | |
Notes:
- Products for gas applications can also be manufactured.
- Products with no rubber used in the wetted parts can also be manufactured.
Performance
| Offset | 15% or less of the maximum set pressure (minimum value: 0.015 MPa) |
|---|---|
| Minimum Adjustable Flow Rate (Water) (¹) | 0.5 L/min |
| Valve Seat Leakage | 0.01% or less of the rated flow rate |
| Maximum Usable Viscosity | 400 mm²/s (under operating temperature conditions) |
Note (¹): For liquids other than water, divide by √γ (γ = specific gravity of the liquid, assuming water at 4°C as 1).
Cv Value
| Nominal Diameter | 10 | 15 | 20 | 25 |
|---|---|---|---|---|
| Cv | 0.7 | 0.7 | 0.7 | 0.7 |
Structure and Dimensions
Dimensions and Weight
| Valve Box Material (Detection Method) | Nominal Diameter | L | H₁ | H₂ | E | Weight (kg) | Pipe Connection |
|---|---|---|---|---|---|---|---|
| Bronze (External Detection) | 10・15 | 100 | 24 | 208 | 80 | 3.3 | JIS Rc Threaded |
| Bronze (Internal Detection) | 10・15 | 100 | 24 | 208 | 80 | 3.3 | JIS Rc Threaded |
| Stainless Steel Cast (External Detection) | 15 | 100 | 28 | 215 | 80 | 3.7 | JIS Rc Threaded |
| Stainless Steel Cast (Internal Detection) | 15 | 100 | 28 | 215 | 80 | 3.7 | JIS Rc Threaded |
| Stainless Steel Cast (External Detection) | 25 | 155 | — | 215 | 80 | 5.5 | Flange JIS 20K Flat Seat |
| Stainless Steel Cast (Internal Detection) | 20 | 155 | — | 215 | 80 | 5.7 | Flange JIS 20K Flat Seat |
| Stainless Steel Cast (Internal Detection) | 25 | 155 | — | 215 | 80 | 6.8 | Flange JIS 20K Flat Seat |
Notes:
- For stainless steel cast valve boxes, the flange-type external detection model is also available.
- External detection types require detection piping connections.
