Description
Spirax Sarco BSA and BSAT bellows-sealed globe valves feature a double bellows seal and are designed for steam, gases, liquids, condensate, and water systems. The standard BSAT series is equipped with a throttling plug and stem locking device, while the optional BSA series features a flat plug. These products comply with the European Pressure Equipment Directive 97/23/EC, and EN 10204 3.1 certificates are available for selected models.
Approximate Product Weight (kg)
| Size | BSA2 BSA2T | BSA3 (DIN) | BSA3 (ANSI) ANSI 150 | BSA3 ANSI 300 JIS/KS 20K | BSA6T PN40 |
|---|---|---|---|---|---|
| DN15 | 4 | 4 | 5 | 6 | 4 |
| DN20 | 4 | 5 | 6 | 7 | 5 |
| DN25 | 5 | 6 | 8 | 9 | 6 |
| DN32 | 7 | 8 | - | - | 8 |
| DN40 | 10 | 11 | 10 | 11 | 11 |
| DN50 | 12 | 14 | 12 | 15 | 14 |
| DN65 | 16 | 19 | - | - | 19 |
| DN80 | 21 | 26 | 25 | 29 | 26 |
| DN100 | 36 | 44 | 41 | 49 | 44 |
| DN125 | 52 | 64 | - | - | - |
| DN150 | 75 | 88 | - | 94 | - |
| DN200 | 145 | - | - | - | 193 |
Leakage Class
Plug-to-seat sealing complies with EN 12266 - 1 Class A and ISO 5208 Class A. The leakage class for BSA3 (ANSI) complies with API 598 zero-leakage requirements.
Materials
- BSA6T Materials
| No. | Component | BSA6T |
|---|---|---|
| 1 | Body | Stainless steel EN 10213 1.4408 or STM A351 CF8M |
| 2 | Bonnet | Stainless steel EN 10213 1.4581 |
| 3 | Seat | Stainless steel EN 10213 1.4408 or STM A351 CF8M |
| 4 | Disc | DN15 - DN40: stainless steel EN 10088 1.4571; DN50 - DN100: stainless steel EN 100222 1.4571 |
| 5 | Bellows | Stainless steel DIN 17440 1.4571 |
| 6 | Stem | Stainless steel EN 10088 1.4571 |
| 7 | Handwheel | Pressed steel BS 1449 CR4 |
| 8 | Stem Packing | Graphite |
| 9 | Bonnet Bolts | Stainless steel A4 - 70 |
| 10 | Bonnet Nuts | Stainless steel A4 |
| 11 | Body/Bonnet Gasket | Stainless steel-reinforced exfoliated graphite |
| 12 | Locking Nut | DN15 - DN80: steel M8×14mm A2 - 70; DN100 - DN150: steel M8×20mm A2 - 70; DN200 - DN250: steel M12×20mm A2 - 70 |
Stroke Limitation for Throttling Models
The handwheel nuts on BSA2T and BSA3T protective caps have a threaded hole for installing a stroke limiter. Customers must provide the standard bolts and nuts listed in the table below.
| Size | Hexagon Bolt |
|---|---|
| DN15 - DN80 | M8×50mm |
| DN100 - DN150 | M12×75mm |
| DN200 - DN250 | M12×100mm |
The BSA6T handwheel nut also has a threaded hole for installing a stroke limiter. The standard bolts and nuts supplied by the customer are the same as those listed above.
Body Design Conditions
- BSA2T and BSA2
| Body Design Conditions | PN16 | PN25 |
|---|---|---|
| PMA - Maximum Allowable Pressure | 16 bar g | 25 bar g |
| TMA - Maximum Allowable Temperature | 350 °C | 350 °C |
| PMO - Maximum Operating Pressure with Saturated Steam | 14.7 bar g | 22.3 bar g |
| TMO - Maximum Operating Temperature (Soft Seat) | 230 °C | 230 °C |
| TMO - Maximum Operating Temperature (Metal Seat) | 350 °C | 350 °C |
| Minimum Operating Temperature | -10 °C | -10 °C |
| Maximum Designed Cold Hydraulic Test Pressure | 24 bar g | 38 bar g |