IHARA SCIENCE CORPORATION
IHARA PYB Series Pipe-Welded Y-Type Bellows Seal Valve
Product Made in Japan
Manufacturer: IHARA SCIENCE CORPORATION
Model: PYB Series
PYB Pipe-Welded Y-Type Bellows Seal Valve (1MPa)
Features
Pipe-Welded Y-Type Bellows Seal Valve(PYB Series) have being developed to reduce troubles (※1)
due to the surface defects of conventional cast steel bodies.
At the same time, delivery lead times become much shorter.
The valve body consists of steel pipes, and achieves significant weight reduction and high cleanliness.
Equipped with a metal bellows seal, it achieves high airtightness and high durability.
Achieves high performance of Cv value through Y-type structure and high lift design.
Wet contact parts are oil-free and treated by precision cleaning.
Carry out assembly, inspection, and packaging. in the clean room (class 1000).
Compared with conventional cast steel valve, achieve short lead time as the body is made of steel pipes.
(※1) Poor appearance due to pin holes, cavities, residual oil, particles generation, etc.
Specification
| Nominal size | 40A | 50A | 65A | 80A | 100A | 125A |
|---|---|---|---|---|---|---|
| 150A | 200A | 250A | 300A | — | – | |
| Working pressure | Vac ~1 MPa | |||||
| Working temperature | -10~+80°C | |||||
| Leak amount | Internal *2 | ^1×10 6Pa*m3/sec. | ||||
| External | ^5×10 l0Pa’m3/sec. | |||||
Main Materials
| Parts Name | Material | |
|---|---|---|
| 1 | Body | 316L SS |
| 2 | Disk | PTFE |
| 3 | Disk Holder | 316L SS |
| 4 | Bellows | 316L SS |
| 5 | Bellows Flange | 316L SS |
| 6 | Gasket | PCTFE |
| 7 | Bonnet | 304 SS |
| 8 | Handle | Ductile Iron |
Model Numbering
PYB – ① ② – 6LCT – ③
Ex.） PYB-50PW5-6LCT-EP [50A Sch.5S Pipe BW, PTFE Disk, PCTFE Gasket, Electropolishing]
① |
|||
| Mark | Size* | Mark | Size* |
| 40 | 40A | 125 | 125A |
| 50 | 50A | 150 | 150A |
| 65 | 65A | 200 | 200A |
| 80 | 80A | 250 | 250A |
| 100 | 100A | 300 | 300A |
② |
||
| Mark | Connection *4) | |
| PW5 | Pipe (BW) | Sch.5S |
| PW10 | SchJOS | |
③ |
|
| Mark | Internal Finish |
| EP | EP Grade （≦Ra0.18μm） |
| BA | BA Grade （≦Ra0.8μm） |
(※4) Other connections are available. Contact us.
Dimensions
| Size | H | L | LI | D | t | W | Lift | |
|---|---|---|---|---|---|---|---|---|
| Sch.5S | Sch.WS | |||||||
| 40A | 214 | 235 | 50 | 48.6 | 1.65 | 2.8 | 125 | 26 |
| 50A | 249 | 260 | 49 | 60.5 | 1.65 | 2.8 | 160 | 34 |
| 65A | 289 | 310 | 53.5 | 76.3 | 2.1 | 3.0 | 180 | 44 |
| 80A | 365 | 400 | 77 | 89.1 | 2.1 | 3.0 | 250 | 52.5 |
| 100A | 406 | 470 | 77.5 | 114.3 | 2.1 | 3.0 | 280 | 64 |
| 125A | 466 | 550 | 73 | 139.8 | 2.8 | 3.4 | 300 | 85.5 |
| 150A | 533 | 640 | 73.5 | 165.2 | 2.8 | 3.4 | 355 | 88.5 |
| 200A | 625 | 800 | 84 | 216.3 | 2.8 | 4.0 | 400 | 100.5 |
| 250A | 1005 | 980 | 112.5 | 267.4 | 3.4 | 4.0 | 600 | 150 |
| 300A | 1082 | 1100 | 107.5 | 318.5 | 4.0 | 4.5 | 600 | 170 |
(※) Sizes of 250A～300A are different structure from above drawing.
High Flow Types, Pneumatic Operation, Purge Ports are available upon requests.
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