Spring Loaded Thermal Safety / Relief Valve
BTS-11HL SERIES
Product description:
Angle Discharge, Spring Loaded, Full Lift, Modified Nozzle, Conventional Type, Screwed End Thermal / Pressure / Safety Relief Valve with Open Cap & Plain Lever.
Design:
The Combination of top guiding unobstructed seat bore and full lift capability produces a safety valve having max. discharge capacity.
Features:
- Top guide design ensures freedom of operation.
- Accurate setting for correct blow off pressure.
- Mirror polished finish metal to metal seat.
- Precision lapped valves disc & seat (Nozzle).
- Stellited trims (Optional)
- Min. spring stock required.
- Each Valve Individually tested with compressed Air.
Application:
The Thermo-Safe BTS-11 Series safety Valves are Suitable for a Variety of duties Including Protection of Steam Pipe Lines ,Small Industrial Boilers [SIB] and Thermal Expansion.
Ordering / Sizing Information:
- Fluid / State
- Flow Rate
- Set Pressure
- Back Pressure
- Operating Temperature
Technical Specifications
| Size Range | 20 mm x 25 mm to 50 mm x 50 mm |
| Body M.O.C | Carbon Steel / Alloy Steel / Stainless Steel. |
| Trims | CF8 / 8M / SS 304 / 316 |
| Orifice (seat) Dia. | 12.7 mm & 19.0 mm |
| Pressure Limit | 8.5 Kg/cm2g. Max. |
| End Connection | Screwed BSP (M/F) / NPT (M/F) . |
Drawing
Material Specification
| SR.NO. | Part Name | Material |
|---|---|---|
| 1 | Body | ASTM A216 GR. WCB |
| 2 | Cap | ASTM A216 GR. WCB |
| 3 | Nozzle | ASTM A351 GR. CF8 / CF8M |
| 4 | Nozzle Ring | ASTM A351 GR. CF8 / CF8M |
| 5 | Disc | SS 304 / SS 316 |
| 6 | Stem | SS 304 / SS 316 |
| 7 | Lock Screw | SS 304 / SS 316 |
| 8 | Adjusting Screw | SS 304 / SS 316 |
| 9 | Adjusting Screw Nut | SS 304 / SS 316 |
| 10 | Setting Spring | Carbon Steel / Alloy Steel / SS 302 |
| 11 | Spring Washer | Mild Steel |
| 12 | Lever | ASTM A216 GR. WCB |
| 13 | Gasket | Aramid Fiber (Non-Asbestos) |
Dimensions (mm)
| SIZE | A ±3.0 | B ±3.0 | C ±100.0 |
|---|---|---|---|
| 20X25 | 55 | 92 | 311 |
| 25X25 | 55 | 92 | 311 |
| 25X40 | 67 | 92 | 360 |
| 40X50 | 67 | 92 | 360 |
| 50X50 | 67 | 92 | 360 |
Standard Followed
- Sizing : API 520
- Design & Mfg. : API 526
- Testing : API 527
- Code : ASME Section VIII Div. 1
- ANSI B 16.34
- ANSI B 16.5
- NACE MR 0175