Key Benefits and Advantages
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Dual Pressure Constructions:
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Low-Pressure Units: Feature a larger diaphragm area to provide maximum sensitivity and accurate control for lower setpoints.
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High-Pressure Units: Built with a heavy-duty casing to withstand inlet pressures up to 550 psi (37.9 bar) while controlling relief settings up to 250 psi (17.2 bar).
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Tight Shutoff: The 630R is designed to provide excellent shutoff performance. This prevents gas leakage and product loss when the system pressure is below the setpoint, ensuring that relief only occurs during actual overpressure events.
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Sour Gas Service Compatibility: For applications involving hydrogen sulfide (H2S), the 630R is available in constructions that meet NACE MR0175 and MR0103 standards. This makes it suitable for “sour” environments common in oil and gas production.
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Interchangeability: Many of the internal components are interchangeable across the 630 Series family. This simplifies spare parts inventory and allows for easier upgrades or reconfigurations of existing valves.
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Rugged Construction: Often called the Big Joe for its durability, the 630R features a heavy-walled body and robust internal parts that can withstand the thermal and mechanical stresses of refinery and compressor station service.
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Ease of Maintenance: The design allows for straightforward access to the seat and disk. Maintenance can typically be performed without removing the valve body from the pipeline, reducing labor and downtime.
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Simple Operation: As a direct-operated valve, the 630R relies on a simple spring-and-diaphragm mechanism, offering a reliable “set it and forget it” solution for backpressure control.
Technical Properties
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Operation: Direct-operated relief / Backpressure.
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Body Sizes: NPS 1 and NPS 2 (DN 25 and DN 50).
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Maximum Inlet Pressure: Up to 550 psi / 37.9 bar.
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Relief Setpoint Range: Up to 250 psi / 17.2 bar.
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End Connections: Available in NPT threaded or flanged ends.
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Media: Natural gas, air, propane, and various process gases.
Field of Application
The Type 630R is the industry standard for high-pressure gas headers and rugged industrial utilities.
Primary Industries and Uses:
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Compressor Stations: Regulating backpressure on discharge lines and protecting stage cooling equipment.
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Refineries: Managing excess gas in fuel gas headers and process return lines.
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Oil and Gas Production: Acting as a high-pressure relief valve for separators and wellhead manifolds.
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Transmission Pipelines: Providing overpressure protection for farm tap systems and scraper facilities.
