Belgas P98H Back Pressure Regulator / Relief Valve

The P98H Relief Valve / Back Pressure Regulator is an industrial-grade pressure control device specifically engineered to sense and regulate upstream pressure in demanding process environments. When operating as a relief valve, the P98H automatically opens to discharge excess pressure once the upstream pressure exceeds the designated set point, ensuring system protection and stable operation.

In back pressure regulation service, the valve continuously monitors upstream pressure and maintains it at the desired level by releasing fluid downstream whenever the pressure surpasses the preset threshold. This dual-function capability makes the P98H highly versatile for both protective and control applications.

Designed for reliability and durability, the P98H is suitable for harsh industrial systems such as boilers, heaters, steam injection lines, and various process circuits found in pulp and paper, chemical, water treatment, and wastewater operations.

Technical Specifications

Type:
Relief Valve / Back Pressure Regulator

Operating Principle:

• Senses upstream pressure

• Opens proportionally to relieve excess pressure above set point

• Maintains constant upstream pressure in back pressure regulation applications

Function:

• Protects systems from overpressure

• Controls upstream pressure by releasing flow downstream during pressure rise

Applications:

• Pulp and Paper: Boilers, heaters, PM (Paper Machine) drums

• Chemical Industry: Chemical boilers, process heaters

• Water and Wastewater Systems: Pressure control and overpressure protection

• Steam Injection: Upstream pressure regulation under high-temperature service

Pressure Monitoring:
Upstream pressure sensing with automatic relief once set point is exceeded

Performance Characteristics:

• Stable pressure control in variable load conditions

• Fast response to upstream pressure fluctuations

• Designed to ensure safe and efficient operation in steam and process fluid systems

General Features:

• Heavy-duty construction suitable for industrial applications

• Capable of handling elevated temperatures typical of steam and boiler service

• Designed for long service life with minimal maintenance requirements