This manual provides installation, adjustment, testing, and repair instructions for Crosby 800 and 900 OMNI-TRIM series pressure relief valves.
The manual covers the complete lifecycle of Crosby 800 and 900 OMNI-TRIM pressure relief valves, including storage, handling, installation, testing, pressure setting, disassembly, cleaning, seal‑face grinding, re‑assembly, protective‑cover assembly, and spare‑part ordering. It follows ASME Boiler and Pressure Vessel Code requirements and emphasizes safety, proper cleaning, and use of genuine Emerson parts.
Key sections guide users through proper vertical installation, selection of test media (air, nitrogen, or water), adjustment procedures, detailed disassembly steps, seal‑face grinding methods for metal‑sealed valves, and the correct assembly of protective covers and lifting wrenches. The document also provides part‑number information and ordering instructions. This manual is written in Chinese.
| Installation orientation | Vertical upward position |
|---|---|
| Test medium for gas/steam valves | Air or nitrogen |
| Test medium for liquid valves | Water |
| Applicable media | Gas, steam, and liquid (water) applications |
| Connection size requirement | Internal diameter not less than valve inlet diameter |
Air or nitrogen should be used as the test medium for gas and steam valves.
No. For valves equipped with D‑type or E‑type protective covers, a wrench must not be used to lift or move the valve.
The valve inlet pressure should be reduced to at least 25 % below the marked opening pressure before any adjustment.