Key Benefits and Advantages
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High-Temperature Capability: Engineered for service up to 550°F / 288°C, making it one of the few pilot-operated relief options suitable for high-pressure steam and hot process liquids.
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Superior Chemical Resistance: Offers a wide array of chemically compatible elastomers, including Perfluoroelastomer (FFKM) and high-temperature EPDM. These options provide excellent resistance to heat and aggressive corrosive chemicals.
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Class VI Shutoff: Even at high temperatures, the use of specialized elastomers ensures a bubble-tight, ANSI Class VI shutoff, preventing product loss and maintaining system pressure during normal operation.
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Fast Speed of Response: The pilot-operated design allows the main valve to respond rapidly to pressure spikes, ensuring immediate relief to protect downstream equipment or upstream process integrity.
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NACE MR0175/MR0103 Availability: Construction materials can be specified to meet NACE requirements for sour gas environments, making it ideal for upstream oil and gas production.
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Versatility: A single valve platform that performs equally well in liquid, gas, or steam service, simplifying spare parts inventory and engineering specifications across a facility.
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Easy Differential Conversion: The 98HM pilot configuration can be easily modified for differential pressure control, allowing the valve to maintain a set pressure difference between two points in a process.
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Durable Construction: Available in a variety of robust materials, including Stainless Steel and Carbon Steel, to match the metallurgical requirements of the piping system.
Technical Properties
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Operation: Pilot-operated for high-gain, accurate response.
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Temperature Range: Up to 550°F / 288°C with appropriate elastomer selection.
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Pilot Type: Utilizes the Type 98HM high-temperature pilot for precise setpoint control.
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Body Sizes: Available in standard industrial sizes to meet high-volume relief requirements.
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Media Compatibility: Steam, Gas, and Liquids.
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Shutoff Integrity: ANSI Class VI (Bubble Tight).
Field of Application
The 63EG-98HM is the preferred solution for relief and backpressure tasks where standard regulators would fail due to heat or chemical degradation. Its accuracy makes it vital for process stabilization.
Primary Industries and Uses:
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Power Generation: High-temperature steam relief and boiler feed water backpressure.
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Chemical Processing: Pressure maintenance for reactors and vessels containing aggressive solvents or acids.
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Oil and Gas: Sour gas (H2S) relief and high-pressure separator backpressure control.
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Refining: Managing hot hydrocarbon liquids and heavy crude process streams.
