Crossovers Pressure Control Equipment Crossovers Omega PCE Crossovers are primarily for connecting various parts of pressure control equipment together.They are available in a full range of configurations including API flanges, quick unions etc and various pressure ratings. Fully certified Crossovers manufactured to industry standard & specifications. Quick Union to Quick Union. Quick union to flange. Quick union to threaded connection. Flange to threaded connection. Threaded connection to threaded connection. Contact us for more information about our Crossovers. Contact Us