This valve is a single regulating valve that has a diaphragm driven by the operation of air-pressure. Quantity of flow can be adjusted according to air-pressure supplied. Because stellite is used for both the valve disc and seat, it is highly durable, corrosion and erosion are suppressed and the product has a long operational life. In tire-curing presses it is mainly used to regulate the temperature of the platen and container jacket.
Specification
| Fluid | Steam |
|---|---|
| Maximum Operating | 1.7 MPa (247 psi) |
| Maximum Allowable | 210℃ (410℉) |
| Pilot Pressure | 0 to 0.13 MPa (0 to 19 psi) |
| Pilot Port | Rc1/4, NPT1/4, G1/4 |
| End Connection | Thread (Rc, NPT) |
| Flange (JIS 20K RF, ASME Class 300, DIN PN40) |
Outside
| End Connection | |||
| Thread | Flange | ||
| Function | Air to Open |
 DC1211-□□ |
 DC1212-□□ |
| Air to Close |
 DC1221-□□ |
 DC1222-□□ |
|
Order Code
| Symbol | Meaning of Symbol | Meaning of number and alphabetical character |
Remarks | |
|---|---|---|---|---|
| N1 | Model Series | 1 | First Generation | |
| N2 | Number of Ports | 2 | 2-Port (2-way) | |
| N3 | Function | 1 | Air to Open | Valve seat opens with rise in pilot air pressure |
| 2 | Air to Close | Valve seat closes with rise in pilot air pressure | ||
| N4 | End Connection | 1 | Thread | |
| 2 | Flange | |||
| N5 | Nominal Size | 15 | DN15, NPS1/2 | |
| 20 | DN20, NPS3/4 | |||
| 25 | DN25, NPS1 | |||
| 32 | DN32, NPS1-1/4 | |||
| 40 | DN40, NPS1-1/2 | |||
| N6 | End Connection Flange Type |
Nil | - | Incicates spec with flanges at body ports #1, #2, and #3. Where flanges are not used, please leave blank. |
| J | JIS 20K | |||
| A | ASME Class 300 | |||
| D | DIN PN40 | |||
| N7 | End Connection & Pilot Port Thread Type |
P | Rc |
Indicates thread spec for pilot air port and body ports #1, #2, and #3. However, with G type, this indicates the thread for the pilot air port, with the body being Rc. Pilot Air port size is 1/4 （Rc1/4, NPT1/4, G1/4) |
| N | NPT | |||
| B | G, Rc | |||
| N8 | Material of Flange | Nil | Material of Flange: S25C | Flange material is S25C |
| Y | Material of Flange: SUS304 | Flange material is SUS304 | ||
| N9 | Cv Value | Nil | Should be left blank if the CV value is standard. <Standard CV values> DN15, DN20 : 6 DN25: 8 DN32, DN40: 20 |
|
| CV3 | CV=3 | |||
| CV1 | CV=1 | |||
| N10 | Special Options | Z□□ | Other Special Options | Indicates fixed number (Z01~) corresponding to each special option. |