Emerson 289H-42 Pressure Relief Regulator
Emerson 289H-42 Pressure Relief Regulator
Manufacturer: Emerson
Product No.: 289H-42
Condition:1000 in stock
Product Type: Industrial Pressure Regulator
Product Origin: 6923457890123
Payment: T/T, Western Union
Weight: 7000g
Shipping port: Xiamen
Warranty: 12 months
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Emerson 289H-42 Pressure Relief Regulator
The Emerson 289H-42 is a precision-engineered pressure relief regulator from the proven 289 Series, designed to protect downstream equipment and processes from overpressure conditions in industrial gas distribution systems. This robust regulator combines reliable pressure control with fail-safe relief functionality, making it essential for refineries, chemical plants, power generation facilities, and natural gas transmission networks where safety and regulatory compliance are paramount.
Core Engineering Features
- Dual-Function Design: Integrated pressure regulation and relief in a single compact body—eliminates the need for separate relief valves and reduces installation footprint
- Flexible Body Configurations: Available in 1 NPT and 2 NPT inlet connections (Type 289H) to accommodate various pipeline sizes and flow requirements
- Precision Pressure Adjustment: External adjusting screw enables field calibration without disassembly—set points remain stable under varying flow conditions
- Internal Pressure Registration: Direct-acting diaphragm senses downstream pressure for accurate control response and minimal droop characteristics
- Hydrogen-Ready Construction: Certified for gas mixtures containing up to 25% hydrogen by volume—future-proof for energy transition applications
Material & Temperature Capabilities
The 289H-42 offers multiple elastomer options to match your process conditions:
- Nitrile (NBR) & Neoprene (CR): Standard sealing for -20 to 150°F (-29 to 66°C)—ideal for ambient natural gas, compressed air, and nitrogen service
- Fluorocarbon (FKM): High-temperature option for 20 to 300°F (-7 to 149°C)—recommended for steam, hot gas, and chemical vapor applications (Types 289H/289HH only)
Note: Bubble-tight shutoff requires minimum 5 psig (0.34 bar) setting when using FKM O-ring seats due to material hardness characteristics.
Application Scenarios
Natural Gas Distribution: Regulate city gate stations, industrial meter runs, and fuel gas skids while providing overpressure protection for downstream appliances and burners.
Refinery & Petrochemical: Control instrument air headers, nitrogen blanketing systems, and process gas feeds with integrated relief to prevent equipment damage during upset conditions.
Power Generation: Manage fuel gas pressure to turbines and boilers with fail-safe relief during load swings or compressor surges.
Hydrogen Blending Infrastructure: Support renewable energy initiatives by safely regulating hydrogen-natural gas blends up to 25% H₂ concentration in existing pipeline networks.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model Number | 289H-42 |
| Series | Emerson 289 Pressure Regulator Family |
| Body Sizes | 1 NPT or 2 NPT (Type 289H) |
| Pressure Registration | Internal diaphragm sensing |
| Adjustment Method | External adjusting screw (field-serviceable) |
| Temperature Range (NBR/CR) | -20 to 150°F (-29 to 66°C) |
| Temperature Range (FKM) | 20 to 300°F (-7 to 149°C) |
| Hydrogen Compatibility | Up to 25% H₂ by volume (special construction) |
| Shipping Weight (1 NPT) | 4 lbs (2.0 kg) |
| Shipping Weight (2 NPT) | 15 lbs (7.0 kg) |
| Minimum Shutoff Setting | 5 psig (0.34 bar) for bubble-tight seal with FKM |
Installation & Configuration
The 289H-42 installs in horizontal or vertical pipelines with flow direction marked on the body. Upstream isolation and downstream pressure gauges are recommended for commissioning and troubleshooting. The adjusting screw is accessible without removing the regulator from service—rotate clockwise to increase set pressure, counterclockwise to decrease. Consult Table 1 in the installation manual for maximum allowable relief inlet pressure and relief set pressure ranges specific to your configuration.
Safety & Compliance
Emerson 289 Series regulators meet ASME B31.3 process piping codes and are suitable for hazardous area installations when properly specified. The integrated relief function provides secondary overpressure protection as required by API RP 520 and NFPA 54/58 fuel gas codes. Regular inspection intervals should follow manufacturer recommendations and local jurisdiction requirements.
Why Choose the 289H-42?
Unlike standalone regulators requiring separate relief valves, the 289H-42 consolidates two critical functions into a single, space-saving package. Its proven track record in demanding industrial environments—from Arctic gas fields to Middle Eastern refineries—demonstrates reliability across extreme temperature ranges. Emerson's global service network ensures parts availability and technical support throughout the product lifecycle, minimizing downtime and maintenance costs.
Ordering Considerations
When specifying the 289H-42, confirm your required body size (1 or 2 NPT), elastomer material (NBR/CR for standard temps, FKM for high temps), and whether hydrogen blend compatibility is needed. Refer to Table 1 in the product catalog for available configurations, pressure ranges, and optional accessories such as gauge ports, vent limiters, and slam-shut devices.
Related Products
| Product | Description | Link |
|---|---|---|
| KJ3221X1-BA1 HART Analog Output | 8-channel DeltaV analog output module for pressure monitoring | View Product |
| HMI-1TT4 Welding Sight Glass | 1/2 inch cold storage instrument for visual flow verification | View Product |
| 012-050-RAD PR6422 Eddy Current Sensor | 5mm proximity sensor for turbomachinery monitoring | View Product |
© 2025 INDUSTRIAL CONTROL HUB. All rights reserved.
Original Source: https://www.indctrlhub.com
Contact: sales@indctrlhub.com | +0086 18359243191
Product Description
Emerson 289H-42 Pressure Relief Regulator
The Emerson 289H-42 is a precision-engineered pressure relief regulator from the proven 289 Series, designed to protect downstream equipment and processes from overpressure conditions in industrial gas distribution systems. This robust regulator combines reliable pressure control with fail-safe relief functionality, making it essential for refineries, chemical plants, power generation facilities, and natural gas transmission networks where safety and regulatory compliance are paramount.
Core Engineering Features
- Dual-Function Design: Integrated pressure regulation and relief in a single compact body—eliminates the need for separate relief valves and reduces installation footprint
- Flexible Body Configurations: Available in 1 NPT and 2 NPT inlet connections (Type 289H) to accommodate various pipeline sizes and flow requirements
- Precision Pressure Adjustment: External adjusting screw enables field calibration without disassembly—set points remain stable under varying flow conditions
- Internal Pressure Registration: Direct-acting diaphragm senses downstream pressure for accurate control response and minimal droop characteristics
- Hydrogen-Ready Construction: Certified for gas mixtures containing up to 25% hydrogen by volume—future-proof for energy transition applications
Material & Temperature Capabilities
The 289H-42 offers multiple elastomer options to match your process conditions:
- Nitrile (NBR) & Neoprene (CR): Standard sealing for -20 to 150°F (-29 to 66°C)—ideal for ambient natural gas, compressed air, and nitrogen service
- Fluorocarbon (FKM): High-temperature option for 20 to 300°F (-7 to 149°C)—recommended for steam, hot gas, and chemical vapor applications (Types 289H/289HH only)
Note: Bubble-tight shutoff requires minimum 5 psig (0.34 bar) setting when using FKM O-ring seats due to material hardness characteristics.
Application Scenarios
Natural Gas Distribution: Regulate city gate stations, industrial meter runs, and fuel gas skids while providing overpressure protection for downstream appliances and burners.
Refinery & Petrochemical: Control instrument air headers, nitrogen blanketing systems, and process gas feeds with integrated relief to prevent equipment damage during upset conditions.
Power Generation: Manage fuel gas pressure to turbines and boilers with fail-safe relief during load swings or compressor surges.
Hydrogen Blending Infrastructure: Support renewable energy initiatives by safely regulating hydrogen-natural gas blends up to 25% H₂ concentration in existing pipeline networks.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model Number | 289H-42 |
| Series | Emerson 289 Pressure Regulator Family |
| Body Sizes | 1 NPT or 2 NPT (Type 289H) |
| Pressure Registration | Internal diaphragm sensing |
| Adjustment Method | External adjusting screw (field-serviceable) |
| Temperature Range (NBR/CR) | -20 to 150°F (-29 to 66°C) |
| Temperature Range (FKM) | 20 to 300°F (-7 to 149°C) |
| Hydrogen Compatibility | Up to 25% H₂ by volume (special construction) |
| Shipping Weight (1 NPT) | 4 lbs (2.0 kg) |
| Shipping Weight (2 NPT) | 15 lbs (7.0 kg) |
| Minimum Shutoff Setting | 5 psig (0.34 bar) for bubble-tight seal with FKM |
Installation & Configuration
The 289H-42 installs in horizontal or vertical pipelines with flow direction marked on the body. Upstream isolation and downstream pressure gauges are recommended for commissioning and troubleshooting. The adjusting screw is accessible without removing the regulator from service—rotate clockwise to increase set pressure, counterclockwise to decrease. Consult Table 1 in the installation manual for maximum allowable relief inlet pressure and relief set pressure ranges specific to your configuration.
Safety & Compliance
Emerson 289 Series regulators meet ASME B31.3 process piping codes and are suitable for hazardous area installations when properly specified. The integrated relief function provides secondary overpressure protection as required by API RP 520 and NFPA 54/58 fuel gas codes. Regular inspection intervals should follow manufacturer recommendations and local jurisdiction requirements.
Why Choose the 289H-42?
Unlike standalone regulators requiring separate relief valves, the 289H-42 consolidates two critical functions into a single, space-saving package. Its proven track record in demanding industrial environments—from Arctic gas fields to Middle Eastern refineries—demonstrates reliability across extreme temperature ranges. Emerson's global service network ensures parts availability and technical support throughout the product lifecycle, minimizing downtime and maintenance costs.
Ordering Considerations
When specifying the 289H-42, confirm your required body size (1 or 2 NPT), elastomer material (NBR/CR for standard temps, FKM for high temps), and whether hydrogen blend compatibility is needed. Refer to Table 1 in the product catalog for available configurations, pressure ranges, and optional accessories such as gauge ports, vent limiters, and slam-shut devices.
Related Products
| Product | Description | Link |
|---|---|---|
| KJ3221X1-BA1 HART Analog Output | 8-channel DeltaV analog output module for pressure monitoring | View Product |
| HMI-1TT4 Welding Sight Glass | 1/2 inch cold storage instrument for visual flow verification | View Product |
| 012-050-RAD PR6422 Eddy Current Sensor | 5mm proximity sensor for turbomachinery monitoring | View Product |
© 2025 INDUSTRIAL CONTROL HUB. All rights reserved.
Original Source: https://www.indctrlhub.com
Contact: sales@indctrlhub.com | +0086 18359243191