P98H | Back Pressure Regulator / Relief Valve
BelGAS Regulators
The BelGAS P98H is a direct-operated back pressure regulator and relief valve designed to monitor upstream pressure and relieve excess pressure when it exceeds a defined setpoint. It maintains system stability by automatically opening to discharge downstream, protecting equipment and processes from overpressure conditions.
Engineered for consistent and reliable pressure control, the P98H is ideal for applications where maintaining upstream pressure is critical. Its simple, self-contained design provides dependable performance without requiring external power or pilot systems.
The regulator supports a wide range of media including steam, gas, and liquids, making it a versatile solution across industrial systems where pressure control and safety are essential.
Typical Applications:
Pulp and paper boilers, process heaters, water and wastewater systems, chemical processing, and steam injection
Key Features
- Direct-operated back pressure regulator and relief valve
- Maintains upstream pressure by relieving excess downstream
- Maximum inlet pressure up to 300 PSIG (material dependent)
- Wide pressure ranges from 5–200 PSIG depending on configuration
- Available in 3/4″, 1″, 1-1/2″, and 2″ NPT sizes
- Multiple body materials including cast iron, steel, and stainless steel
- Diaphragm options including 302SS, Neoprene, Fluorocarbon, and Monel
- Metal-to-metal and soft seat configurations available
- High flow capacity for gas, steam, and liquid applications
- Optional NACE configurations for sour service
- Flanged and socket weld connection options available
PERFORMANCE ADVANTAGES
Why the P98H Performs Where It Counts
PROTECTS SYSTEM FROM OVERPRESSURE
Automatically relieves excess upstream pressure, preventing damage and improving system safety.
STABLE UPSTREAM PRESSURE CONTROL
Maintains consistent pressure even during fluctuations in flow demand or inlet conditions.
HIGH FLOW PERFORMANCE
Designed to handle large flow volumes across multiple media including steam, air, and liquids.
SIMPLE AND RELIABLE DESIGN
Self-operated regulator requires no external controls, reducing complexity and maintenance.