63EG Relief Valve
Built with multiple body sizes, materials, and pilot options, the 63EG Series offers wide adaptability-from low-pressure gas networks to high-capacity industrial systems. Its quick-change trim and top-entry body structure make field maintenance extremely efficient.
Pilot-Operated Design
Provides accurate control and fast response to pressure changes using compatible pilots such as the Fisher 6358 Series.
Dual-Service Capability (Gas or Liquid)
Suitable for natural gas, fuel gas, industrial gases, hydrocarbons, water, and various process liquids.
Available in NPS 1, 2, 3, 4, 6, 8×6, and 12×6 to support small to very large flow requirements.
NPT, CL150/300/600 flanges, PN flanges, socket weld, and butt weld configurations.
10 to 400 psig (0.69–27.6 bar) depending on body rating and pilot selection.
Quick-Change Trim Package
Allows inline maintenance without removing the valve from the pipeline.
Reduces noise in gas applications and ensures quieter operation in residential or urban environments.
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Pilot-operated relief valve / back-pressure regulator |
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NPS 1 / 2 / 3 / 4 / 6 / 8×6 / 12×6 |
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NPT, CL150/300/600 RF/FF flanges, PN flanges, BWE/SWE |
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Up to 400 psig (27.6 bar), depending on body rating |
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Approx. 10–400 psig |
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Metal plug, soft seat, optional corrosion-resistant materials |
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Quick-change trim, top-entry design |
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While 63EG relief valve represents the main product family, the series includes multiple constructions differing by pilot type, trim materials, flow capacity, and noise-reduction features.
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63EG + 6358 Pilot (Standard) |
Standard configuration for both gas and liquid relief/back-pressure applications. |
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High-Pressure / Alloy-Trim Version |
For corrosive or high-pressure applications in oil & gas and chemical plants. |
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Ideal for noise-sensitive gas applications. |
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High-Capacity Large-Body Version (NPS 8×6 / 12×6) |
Designed for pipelines, separators, tank farms, and high-flow industrial systems. |
Over-pressure protection in gas or liquid systems
Back-pressure regulation on separators, process vessels, heater treaters, and storage tanks
High-capacity industrial pipeline pressure control
Noise-sensitive installations requiring Whisper Trim solutions
- Fast lead times & on-time shipment
- One-year warranty included
- Multiple shipping options + protective packaging
- Long-term global supply experience, serving both end users and other suppliers
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