Simple Solutions That Work! Issue 10

Recommended Inspection & Maintenance Procedures 1. To avoid damage, all wear parts (those in contact with the sand) must be checked regularly, and if required, replaced. 2. Maintenance intervals will be determined by usage of the transporter. To keep track of maintenance intervals, a batch counter should be furnished in the control panel. At a minimum, the following items should be checked at regular intervals of 40,000 cycles: main seal, inlet cone, vent cone, vent cap, discharge flap, seal ring, and leaf spring. Note: different designs have different wear parts. 3. To inspect the wear parts, all air pressure to the transporter must first be turned off, locked-out, and drained. 4. During normal operation the main seal of the transporter blow tank will wear, and therefore, must be checked at certain intervals for wear or cracks by observing the inlet cone through the inlet housing sight glass lens. During a transporter cycle, watch for escaping air around the main seal. (If not available on a particular brand, the valve should be disassembled and checked carefully.) 5. Check for problems with the Air Spring by inflating the Air Spring and checking for leaks. If air leaks are detected replace the Air Spring. Should the Air Spring hesitate to complete its stroke check for external damage to the air controls. If not equipped with an air spring, check whatever device operates the main inlet valve. Conclusion Pneumatic conveying, when chosen and operated correctly can have a profound impact on sand handling in your foundry. The correct choice can eliminate or reduce potential problems with dust collection. Excessive fines generation, and maintenance. Therefore, investing some time and effort to evaluate key factors of the various options will result in better decisions and fewer headaches down the road. 42 Pipe runs should be laid out with a minimum of bends (pipe bends and risers near the end of a line to be avoided). The entire pipeline must be rigidly anchored and supported so that it cannot sway or move during operation. Rod-type pipe hangers are not permitted. Unlike air, gas or water pipelines, sand pipelines are affected by impact loads of sand slugs which causes vibrations and movement of the pipeline unless it is properly anchored. All pipe sections and pipe bends should be connected with special flanged joints only. Butt welding of pipe sections, instead of flanged connections, should not be attempted because the welds of the pipe joints protruding inside the pipe promote local wear and quickly cause leaks in the sand pipe. Once a new system has been placed into operation and works, keep a record of the operating parameters. And later if something goes wrong , you can cross check operating data and make necessary corrections to the system.