Technical Specifications Category Specification Model MR98HH Type Pilot-Operated, Spring-Loaded Monitor or Relief Pilot Function Overpressure Protection (Relief) / Backup Monitor Compatible Main Regulator Fisher 98HH Series Pressure Regulators Setpoint Range The setpoint is field-adjustable. The specific range is determined by the spring range installed inside the pilot. It is set above the primary regulator's control range. Maximum Inlet Pressure Suitable for the high-pressure ratings of the 98HH main regulators. Relief Capacity The flow capacity is sufficient to handle the overpressure scenario for the high-capacity 98HH regulator. Supply Self-powered by the process pressure. No external power required. Materials of Construction Body: Cast Steel or Ductile Iron (for high-pressure service). Internals: Stainless Steel. Port Connections Typically 1/4" NPT or 1/2" NPT for the sensing and control lines.
