Internally Piloted Regulator The Mark 62 internally piloted pressure regulator is a specialty valve designed for critical application regulation in locations where space is limited. Small and lightweight in design, the Mark 62 valve provides the accuracy of a piloted valve with the size, weight, and appearance of a single, self-operated valve. The Mark 62 will accurately control pressure with little deviation from the set point. The accuracy levels approach those provided by control valves with quicker response, therefore, the Mark 62 should be considered before other more expensive, sophisticated control instrumentation.