The Ingersoll Rand 38457511 is a replacement high pressure switch used on a variety of their non-cycling refrigerated air dryers. Often this part needs to be replaced if your dryer controller is flashing an HtA or Ht2 error code.
This may be labeled in your parts manual as 1P1. This part is often located next to the fan near the refrigeration filter on the D12-180IN refrigerated air dryers.
The solenoid valve was used on the following Ingersoll Rand air dryers
Part #: 38457412
Part #: 38457594
Part #: 38457917
Part #: 38457644
Part #: 38457537
Part #: 38459616
Part #: 38459756