Spiro Stainless Steel Ball Valve

**Spirax Sarco Stainless Steel Ball Valve** Installation Although the valve structure is quite sophisticated, stretching caused by poor alignment of the piping and/or incorrect piping length must be avoided, as it can adversely affect the valve's performance. Special attention should be paid to the proper alignment of the piping, ensuring that the piping and valve are on the same axis. The valve is used for on-off applications and allows bi-directional flow. When used in steam systems: 1. Install a steam trap upstream of the valve. 2. Open the valve slowly to avoid water hammer. Safety Points Before disassembly and adjustment, confirm that there is no flow of medium in the pipeline. The pipeline should be shut off at some point, or the flow of fluid should be interrupted. The fluid in the pipeline must be drained before disassembling the valve. Maintenance Overview of Spirax Sarco Stainless Steel Ball Valve When replacing the seat and reassembling the valve, it is recommended to conduct a cold test on the valve body: 30 bar g for ANST 150, 75 bar g for ANST 300, and 60 bar g for PN40 using compressed air at 7 bar g for the seat leakage test. Tools for disassembling the screw-in cover should be considered carefully, and it should not be heated. Additionally, the entire valve can be returned to Spirax Sarco for maintenance service. Replacing the main valve stem seal and seat If the old O-ring gasket is used at temperatures close to 315°C or higher, it may decompose and form hydrofluoric acid. Avoid contact with and inhalation of any fumes, as this acid can cause skin burns and damage the respiratory system. More detailed information regarding fluorinated rubber can be found in Spirax Sarco's documentation. 1. Remove the valve from the pipeline (see safety guidelines). 2. Use a special tool - Spirax Sarco can provide samples - to unscrew the cover (2). See warnings. 3. Next, the seat (4) and ball can be removed, and the stem can be drawn out to replace the new stem seal (6A). 4. Reassemble with a new O-ring (8). See warnings. 5. Apply PTFE-based sealing material to the cover threads. 6. The cover (2) should be tightened to the specified torque in the table. 1. $K}$}} <16}p16A) 2. Replace the stem seal (6: R-PTFE and 7: Graphite) Note: If a leak is found at the stem, the compression nut (16A) can be tightened without needing to replace the stem seal. The compression nut (16A) should be tightened to the torque specified in the table. The above content was prepared by Biao Wei Company. Please indicate the source when reprinting the article. Our company also supplies similar products: **Spirax Sarco Three-Piece Ball Valve, Spirax Sarco Stainless Steel Ball Valve, Spirax Sarco M10S2RB Ball Valve**