Double Seal Zero Leakage
Product Overview
Yoshitake BSV-2EN Manual Bellows Sealed Globe Valve is a compact and reliable valve designed for various non-hazardous fluid transfer systems. The inside screw handle design effectively prevents foreign matter from affecting the threaded parts. The double seal design combining bellows and packing completely eliminates external leakage risks. Its unique structure requires no forceful stem pressing, enabling smooth and effortless operation without packing replacement, significantly reducing maintenance costs for industrial and commercial fluid transfer applications.
Product Features
- Inside Screw Handle Design: The stem threads are barely exposed externally, effectively preventing failures caused by foreign matter intrusion and extending product service life.
- Zero External Leakage: Double seal design with bellows and packing provides dual protection ensuring no external leakage during operation for enhanced safety.
- Easy Operation: No packing tightening required, avoiding handle rotation issues caused by forceful stem pressing for smooth and effortless operation.
- Maintenance-Free: No periodic packing replacement needed, reducing maintenance workload and parts costs for lower total cost of ownership.
Technical Specifications
Basic Parameters
| Item | Specification |
|---|---|
| Model | BSV-2EN |
| Applicable Fluids | Steam, Air, Cold/Hot Water, Oil, Other Non-hazardous Fluids |
| Nominal Diameter | 15A-200A (250A available on custom order, cast iron only) |
| Max Operating Pressure | 1.6 MPa (PN16, per PT rating); 2.5 MPa (PN25, per PT rating) |
| Max Operating Temperature | 300°C (PN16, per PT rating); 350°C (PN25, per PT rating) |
| Connection | EN 1092-2 PN16, EN 1092-2 PN25 |
Material Specifications
| Component | Material |
|---|---|
| Body | Ductile Iron (Cast Iron for 125A and above) |
| Bonnet | Ductile Iron |
| Disc | Stainless Steel |
| Seat | Stainless Steel |
| Bellows | Stainless Steel (SUS316Ti) |
Pressure-Temperature Rating
Maximum allowable pressure at different temperatures per EN 1092-2 standard:
| Material | PN | -10~120°C | 150°C | 200°C | 250°C | 300°C | 350°C |
|---|---|---|---|---|---|---|---|
| Cast Iron | 16 | 1.60 MPa | 1.44 MPa | 1.28 MPa | 1.12 MPa | 0.96 MPa | - |
| Ductile Iron | 25 | 2.50 MPa | 2.43 MPa | 2.30 MPa | 2.18 MPa | 2.00 MPa | 1.75 MPa |
Note: BSV-2EN PN16 flange rating applicable within orange zone; BSV-2EN PN25 flange rating applicable within both orange and green zones.
Dimensions & Weight
| Nominal Diameter | L (mm) | H (mm) | Weight (kg) |
|---|---|---|---|
| 15A | 130(130) | 184 | 3.2(4.0) |
| 20A | 150(150) | 184 | 3.9(4.5) |
| 25A | 160(160) | 188.5 | 4.6(5.5) |
| 32A | 180(180) | 193 | 6.5(8.0) |
| 40A | 200(200) | 235.5 | 9.0(11.5) |
| 50A | 230(230) | 235.5 | 11.0(14.0) |
| 65A | 290(290) | 252.5 | 15.8(18.0) |
| 80A | 310(310) | 272.5 | 20.5(22.0) |
| 100A | 350(350) | 348 | 35.0(35.0) |
| 125A | 400(400) | 388 | 49.0(49.0) |
| 150A | 480(480) | 448 | 76.0(76.0) |
| 200A | 600(600) | 575 | 130.5(130.5) |
Note: Values in parentheses indicate face-to-face dimensions for PN25 flange standard (EN558-1 Series 1).
Ordering Information
- Standard nominal diameter range is 15A-200A. For 250A size, please contact us for custom order (cast iron material only).
- Available in PN16 and PN25 pressure ratings. Please specify required pressure rating along with operating temperature and fluid type when ordering.
- Material selection depends on application. Body material defaults to cast iron for sizes above 125A, and ductile iron for 125A and below. Contact us for special material requirements.
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