1. Ensure the draft fan is operating and close the safety shut-off valves. 2. Open the main manual gas supply valve and the vent valve. 3. Note the pressure gauge reading between the gas pressure regulator and the first safety shut-off valve. It should stabilize at the "lock-up"
See related content like products and images with every search.
RULES AND REGULATIONS FOR BOILER AND PRESSURE VESSEL
Safety valves are commonly tested by lifting the safety valve try lever.. With the boiler pressure at a minimum of 75% of the safety valve set pressure, the safety valve try lever is lifted to wide open position. Steam is discharged for 5 sec to 10 sec. The try lever is released, and the disk should snap to the closed position against the valve seat. Malfunctioning safety valves must be replaced as soon as possible.
The following maintenance items, as appropriate to the specific boiler system, need to be considered for implementation on a regular basis (e.g., daily, weekly, monthly, semiannually, annually). A checklist of the items should be incorporated into a maintenance log with provisions for checking off the item for the appropriate period.
Your guide to safer boiler operation. Steam boiler. 1. Safety valve 2. Low-water cutoff 3. Water column blow-down valve 4. Pressuretrols (one is high-limit safety) 5. Steam pressure-gauge 6. Water column clean-out (cross tee) 7. Bottom blow-off and drain valve 8. Low-water cutoff/blow-off valve Note: Second low-water-cutoff not shown in diagram
Boiler Safety - Occupational Safety and Health Administration
Boiler Safety Valves Code Books Required: BPVC-I – Power Boilers BPVC-II – Materials Part A – Ferrous Materials Specifications Part B – Nonferrous Materials Specifications Part C – Specifications for Welding Rods, Electrodes and Filler Metals Part D – Properties (Customary or Metric)