Hi People,

Hope you can help me. We have a bank of compressors running off a proprietary controller. The trouble is that on one of the compressors the on-board controller has no input to allow control of its load/unload state. This on-board controller relies only on the pressure transducer input (0 - 5vdc) to decide whether to open or close the load/unload solenoid. My idea is that I can build a little voltage regulator using an LM117 whose output is paralleled with the pressure transducers output and switched on from the bank controller to "trick" the on-board controller it has a high pressure state and will unload.

My question is; will this work, and is there any danger I will back feed the pressure transducer and damage it?

Any help would be mightily appreciated.

 

Hi

Let me understand the situation.

1. Your compressor running in LOAD state

2. The pressure transducer is NOT working to make it unload (??)

only IF my understanding correct,

second, normally the Anti-surge valve are FAILOPEN open valves, any Fail i.e Air, power to solenoid valve will open the valve i.e UNLOAD the valve.

taking out Air to SOV also will also UNLOAD

pandu