Key Benefits and Advantages
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Tight Shutoff: Engineered with high-quality seating materials that ensure a positive, bubble-tight seal. This prevents gas leakage and nuisance venting during normal operating pressures, conserving fuel and reducing odor complaints.
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Simple Adjustment: The relief setpoint is easily adjusted by a single screw on the top of the spring case. This allows field technicians to quickly calibrate the valve to the specific requirements of the installation site.
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Complete Venting: The design ensures that once the setpoint is exceeded, the valve opens fully to provide high-capacity relief. The vent is designed to discharge gas efficiently, ensuring that system pressure stays within safe limits.
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Easy Maintenance: The 1805 Series is designed for “in-line” service. The internal parts can be inspected, cleaned, or replaced without removing the valve body from the piping, which significantly reduces maintenance costs and labor.
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Sour Gas Service Capability: For applications involving wellhead gas or environments with hydrogen sulfide (H2S), the 1805 Series can be specified with NACE-compliant materials to ensure long-term structural integrity and safety.
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Durable Construction: Built to withstand the harsh conditions of outdoor farm tap sets, including extreme temperature fluctuations and atmospheric corrosion.
Technical Properties
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Relief Pressure Range: Available in various spring ranges from 5 to 125 psig (0.34 to 8.6 bar).
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Maximum Emergency Pressure: Capable of handling up to 150 psig (10.3 bar) including build-up, providing a significant safety margin.
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Media Compatibility: Natural gas, propane, air, and other compatible gases.
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End Connections: Typically available in 3/4-inch and 1-inch NPT threaded connections.
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Material Options: Offered in Cast Iron and Steel bodies with specialized internal trims for sour gas or standard service.
Field of Application
The 1805 Series is a staple in rural gas distribution networks where high-pressure transmission lines are tapped for local use. Its reliability makes it a trusted component for protecting small-scale gas infrastructure.
Primary Industries and Uses:
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Farm Tap Installations: Providing essential overpressure protection between the high-pressure primary regulator and the low-pressure secondary regulator.
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Agricultural Gas Systems: Protecting irrigation engines, grain dryers, and heating systems in remote areas.
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Gas Distribution: Used as a secondary relief valve in district regulating stations and small municipal gas loops.
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Industrial Air Systems: Providing simple and effective relief for small-volume compressed air headers.
