Low Pressure Full Flow Manual Bellows Valve (YBV)
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2013.04.26 15:59
Major Specifications
| Size | 1/2″ | 3/4″ | 1″ |
|---|---|---|---|
| Cv Value | 17 | 23 | 38 |
| Max. Working Pressure (G.) | 1MPa | ||
| Max. Working Temp. | -10℃ ~ 80℃ | ||
|
Internal Leakage Allowance (He) Test Pressure ≤ 1×10-2 Torr Holding Time ≥ 15 sec. |
4x10-6Pa · m3/s | 1x10-6Pa · m3/s | |
|
External Leakage Allowance (He) Test Pressure ≤ 1×10-2 Torr Holding Time ≥ 1 min. |
4x10-6Pa · m3/s | 1x10-6Pa · m3/s | |
|
Particle Inspection (EP only) Pressure : 60~80psi N2 Gas Sample Volume : 1CFM 0.1㎛ and Larger |
No count | No count | |
| GRADE | AP | BA | EP |
|---|---|---|---|
|
Inner Surface Roughness |
Ry ≤ 25㎛ Cut off Length : 2.5mm Measuring Length : 12.5mm |
Ry ≤ 3.0㎛ 10 μinch Ra(Avg.) Cut off Length : 0.8mm Measuring Length : 4mm |
Ry ≤ 0.7㎛ 5 μinch Ra(Avg.) Cut off Length : 0.25mm Measuring Length : 1.25mm |
| Polishing | Machining Finish | Machining Finish | Electro Polishing Finish |
| NO. | NAME | MATERIAL |
|---|---|---|
| 1 | Body |
316L Stainless Steel 304 Stainless Steel |
| 2 | Disk | PCTFE / PTFE |
| 3 | Bellows | Stainless Steel 316L |
| 4 | Handle | ALUMINUM |
| MATERIAL | SIZE | CONNECTION | GRADE | ||||
|---|---|---|---|---|---|---|---|
| S | 316L Stainless Steel | T8 | 1/2″ | TW | Butt Weld | AP | AP Grade |
| 4S | 304 Stainless Steel | T12 | 3/4" | - | - | BLANK | BA Grade |
| - | - | T16 | 1″ | - | - | P | EP Grade |
| MODEL | CONNECTION | SIZE | A | B | C | D |
|---|---|---|---|---|---|---|
| Butt Weld | 1/2″ | 180 | 8.4 | 109 | 52 | |
| 3/4″ | 200 | 11.5 | 127 | 59 | ||
| Butt Weld | 1″ | 257 | 17.7 | 187 | 65 |