Key Benefits and Advantages
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Unmatched Versatility: A true multi-purpose platform suitable for backpressure, bypass, and relief tasks across liquid, gas, and steam services.
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Differential Pressure Capability: Specialized models (MR98LD, MR98HD, and MR98HHD) utilize pressure loading to maintain precise differential pressures or allow for remote setpoint adjustments.
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Large Turndown Ratio: Maintains stable and accurate control even during wide variations in system flow, preventing pressure surges.
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High Pressure Performance: Capable of managing set pressures up to 400 psig (27.6 bar), making it robust enough for heavy-duty industrial steam and fuel systems.
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Tight Shutoff: When equipped with elastomer seats, the MR98 ensures a bubble-tight seal to prevent leakage and maintain system integrity when the relief point is not reached.
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Temperature Resilience: Features standard graphite gaskets for high-heat steam service, with specialized construction options available for Arctic and Cryogenic environments.
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Sanitary Ready: Offers FDA, USP Class VI, and ADI-free EPDM wetted elastomers for sensitive applications in the pharmaceutical and food industries.
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Simplified Maintenance: The top-entry design allows for fast inspection and servicing of internal components without the need to remove the valve body from the piping.
Technical Properties
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Direct-Operated Models: Types MR98L (low pressure), MR98H (high pressure), and MR98HH (extra-high pressure) are spring-loaded for fast, reliable response.
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Pressure-Loaded Models: Types MR98LD, MR98HD, and MR98HHD utilize a loading pressure on the diaphragm for remote or differential control.
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Body Sizes: Available in 1/4 inch to 2 inches (DN 6 to 50).
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End Connections: Offered in NPT, SWE, and various flanged configurations (ANSI or DIN).
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Material Selection: Available in Carbon Steel, Stainless Steel, and specialty alloys for corrosive chemical or special service environments.
Field of Application
The MR98 Series is the go-to “safety valve” for maintaining constant upstream pressure. It is commonly found in pump bypass loops, steam injection systems, and nitrogen purging stations.
Primary Industries and Uses:
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Oil and Gas: Nitrogen purging, fuel line backpressure, and pneumatic supply protection.
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Power and Steam: Steam tracing, steam injection, and boiler feed water relief.
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Life Sciences: Autoclaves, sterilizers, and clean steam backpressure control.
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Manufacturing: Wash tank pressure maintenance and cooling water bypass.
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Process Chemicals: Corrosive chemical relief and test fixture pressure regulation.
