Sewage pipe pneumatic valve how to maintain?

sewage station there were all kinds of pipes, air pipes, sewage pipes, also has the sludge pipeline, some set up on the ground, or laid in the ground, in the process of operation must ensure that the pipeline flow, especially in the winter, regularly check the outdoor pipes, timing off air condensed water in the pipe, no operation of the sewage pipe and sludge water pipes to drain pipe. Running water pipe is not blocked, backwater pipe emptying, air pipe water regularly.
sewage pipe, sludge sewage treatment system, after installation, for heat preservation processing, especially the pneumatic valve insulation to focus, so as not to be freezing in winter.