Caldera Engineering - Severe Service Valves and Letdown Equipment severe service valves, ceramics, on-site support, worldwide site support, customer support, ceramic and metals expertise, corrosion, erosion, solutions, angle valve, valve engineering, field experience, HPAL, POX, flow solutions, slurry valve, control valve, letdown valve, valves, valve, Caldera valve Through engineering, R&D, and worldwide field experience, Caldera develops severe service valves and ancillary equipment for your site's operations