ตัวแทนจำหน่าย Fisher by Emerson Type 92B Self-Powered Control Valve ในประเทศไทย
Fisher The Type 92B Pressure Reducing Valve is recognized as the industry standard for steam control, engineered for long-term, reliable operation. Designed to endure harsh, contaminated environments, it delivers precise and stable pressure regulation, even under demanding conditions.
Commonly used as a main steam pressure reducing valve in a variety of industrial process heating applications, the Type 92B is ideal for:
• Heat exchangers
• Evaporators
• Digesters
• Reactors
In commercial settings, it serves critical roles in:
• District energy meter runs
• Hot water heat exchangers
• Absorption chillers
• Boiler deaerator systems
Performance Specifications
• Inlet Pressure Rating: Up to 300 psig / 20.7 bar
• Inlet Temperature Range: Up to 600°F / 316°C
• Maximum Outlet Pressure: Up to 250 psig / 17.2 bar
The valve’s large actuator and robust main spring ensure exceptional accuracy and pressure stability across the full range of steam flow conditions.
Optional Safety Override Pilot System
For applications requiring additional overpressure protection, the Type 92B can be equipped with the Type 6492HM Safety Override Pilot. Installed in a series configuration, this system:
• Monitors downstream pressure
• Prevents unsafe pressure buildup in the event of a downstream valve failure
This setup is ASME B31.1-1989, 122.14.2.A compliant, and may be used as an alternative to traditional ASME safety valves where vent piping is impractical and the upstream steam pressure does not exceed 400 psig / 27.6 bar.
Features
Extended Diaphragm Lifespan
• The two-ply stainless steel diaphragm with dual flex points offers significantly longer service life compared to standard single-layer designs. This robust construction ensures reliable performance even at elevated steam temperatures.
Precision Resilient Seats for Tight Shutoff
• Each valve seat is individually lapped to ensure a secure seal. Beveled seat geometry allows for simplified in-line lapping when maintenance is required. Both plug and seats are made of hardened stainless steel, enhancing resistance to wire drawing in wet steam environments.
ANSI-Compliant Face-to-Face Dimensions
• The valve is available in standard ANSI configurations including NPT, CL125 FF, CL150 RF, CL250 RF, and CL300 RF end connections. It is also available with PN 16/25/40 RF flanges to suit a wide range of global piping standards.
Scale-Resistant Bellows Stem Guide
• The pilot features a bellows-style stem guide that minimizes sticking due to scale build-up, often caused by boiler carryover.
Raised Actuator Design
• Elevating the actuator prevents condensate from collecting in sensitive areas, reducing the likelihood of corrosion, rust, or plugging over time.
Dual-Path Pressure Sensing
• The system utilizes a two-path control mechanism where downstream pressure is sensed under both the main and pilot diaphragms. This enhances responsiveness and ensures more stable control.
Double Post Stem Guide with Inconel® Bushings
• Top and bottom guides—each fitted with Inconel® bushings—ensure precise plug alignment, eliminate lateral movement, and significantly reduce wear on the valve stem for extended operating life.
Specifications
Pressure Registration
• External
Maximum Temperature
• 353° to 600°F / 178° to 316°C
Body Sizes
• NPS 1 / 1.5 / 2 / 3 / 4 | DN 25 / 40 / 50 / 80 / 100
End Connections
• NPT / BSPT / CL125FF / CL150RF / CL250RF / CL300RF / PN 16/25/40
Maximum Inlet Pressure
• 300 PSIG / 20.7 bar
Maximum Outlet Pressure
• 250 PSIG / 17.2 bar
Spring Ranges
• 2 to 250 PSIG / 0.138 to 17.2 bar
Additional Technical Data
• For additional technical information,?contact?your local?Sales Office?or refer to technical documentation.
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