The HRDJ series has an excellent rangeability of 160: 1, enables multi-control of minute flow rate, and realizes tight shut when fully closed.
Ductile cast iron High rangeability Butterfly valves (HRDJ Series)
Specification
| Maximum service pressure | 1.0MPa |
|---|---|
| Service temperature range EPDM | -20℃ to +120℃ |
| Continuous service temperature range | 0～+100℃ |
| Rangeability | 160:1 |
| Flow characteristics | Equal percentage flow characteristics |
| Searling feature | Tight shutoff |
| Face to face dimensions | JIS B 2032 series number 46 |
| Coupling flange | JIS 5K/10K/16K/20K |
Standard Materials
| Parts | Material |
|---|---|
| Body | FCD450-10 |
| Stem | SUS630 |
| Disc | A351 Gr. CF8 / SCS13A |
| Seat | EPDM |
| O-ring | EPDM |
| Bearing | POM(50A to 200A) |
| Plug | Chromated ZDC2 |
| Bottom stem | SUS403(50A to 100A) SUS420J2(250A to 300A) |
Feature
Excellent flow volume control performance
Tight shut/high rangeability is realized by combining disc section for full-shutoff and disc section for low-opening control for the disc.
Also, cavitation is suppressed by installing a pressure chamber to improve anti-noise multi-orifice.
Installing a multi hall at the disc section for flow-opening control and the fin section realized flow volume characteristics close to ideal equal percent characteristics for flow volume control.
Prevention of erosion by jet flow
The vulcanized bond seat is suitable for controlling high velocity fluid to reduce erosion due to jet flow.
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