SRD991
Stroke 8 to 120mm / 260mm
Angle range up to 95°

Self diagnostics, status- and diagnostic

Easy operation with three keys

 

SRD960
Approved for SIL applications
Flameproof acc. to ATEX
Explosion proof


Self diagnostics, status- and diagnostic messages

Auto-start with self-calibration

SRD998
Supply air pressure up to 10 bar
Auto-start with self-calibration

DTM for valve diagnostics and predictive maintenance

With HART 7 communication

 

SRI986
Electro-Pneumatic Positioner
Split range up to 3-fold possible

Independent adjustment of stroke range and zero

Low vibration effect in all directions

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Foxboro positioner features include intelligent diagnostics for valve health monitoring, partial stroke testing (PST) for safety systems, and robust design for control and reliability. Modern versions offer features like autostart, self-calibration, and a multilingual graphic LCD for easy local operation via a rotary selector or infrared interface. They also have flexible communication options, including HART, Profibus, and Fieldbus, to seamlessly integrate with control systems. 

FOXBORO Positioners Transmitters - SRD991, SRD960, SRD998, SRI986 series

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Foxboro SRD991 Intelligent Positioner- SRD991 Series (200)

SRD991 - iIntelligent Positioner - Part number CDNV7ZZZNR-V03 / - Pneumatic connection G 1/4 / Comunication - Intelligent without communication (4 - 20 mA) / Display - on board / Double Acting

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Foxboro SRD991 Intelligent Positioner- SRD991 Series (201)

SRD991 - iIntelligent Positioner - Part number BDNS6FAANY-V02 / - Manifold: Pneumatic connection 1/4 - 18 NPT made of an additional manifold/ Comunication - Intelligent without communication (4 - 20 mA) / Display - on board / Single Acting

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Foxboro SRD991 Intelligent Positioner- SRD991 Series (202)

SRD991 - iIntelligent Positioner - Part number BDFS7EA4NY-V01 / - Manifold: Pneumatic connection 1/4 - 18 NPT made of an additional manifold/ Comunication - Intelligent without communication (4 - 20 mA) / LCD with Menu-Language in English / German / French / Single Acting

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Foxboro SRD991 Intelligent Positioner- SRD991 Series (203)

SRD991 - iIntelligent Positioner - Part number BHNS7EA4NR-V01 / - Manifold: Pneumatic connection G 1/4/ Comunication - Intelligent without communication (4 - 20 mA) / LCD with Menu-Language in English / German / French/ Single Acting

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Foxboro SRD991 Intelligent Positioner- SRD991 Series (204)

SRD991 - iIntelligent Positioner - Part number BHFS7EA4NY-Z1-V01 / - Pneumatic connection 1/4 - 18 NPT made of an additional manifold/ Comunication - HART Communication (4 - 20 mA)/ LCD with Menu-Language in English / German / French

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SRD960 - Universal Positioner - SRD960 Series (205)

SRD960 - Universal Positioner - Part number BHNDMN6BDZNC-X1 / - Pneumatic connection 1/4 - 18 NPT / Comunication - HART Communication (4 - 20 mA)/ LCD Language in English / German / Portuguese/Single Acting

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SRD960 - Universal Positioner - SRD960 Series (206)

SRD960 - Universal Positioner - Part number BHNDMN7EDZNA-X / - Pneumatic connection 1/4 - 18 NPT / Comunication - HART Communication (4 - 20 mA)/ LCD Language in English / German / French/Single Acting

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SRD960 - Universal Positioner - SRD960 Series (207)

SRD960 - Universal Positioner - Part number TXNSSX7ZZZFS / - Position Transmitter (w/o pneumatic components) / Without Ex (with cable glands and plugs). ATEX (w/o cable glands or plugs)

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SRD960 - Universal Positioner - SRD960 Series (208)

SRD960 - Universal Positioner - Part number BPNDMN6FDZNA / - Connection: 1/4 - 18 NPT. / Communication Fieldbus \LCD Language in English / German / French / Single Acting

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SRD998 - Intelligent Positioner - SRD998 Series (209)

SRD998 - Universal Positioner - Part number HBD0-B0S-1SA07-A1 / - Connection: 1/4 NPT / Communication HART \ Standard Pneumatic (6 bar max air supply) / Single Acting

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SRD998 - Intelligent Positioner - SRD998 Series (210)

SRD998 - Universal Positioner - Part number HAD0-B0S-1SA07-A1/ - Connection: 1/4 NPT / Communication HART \ Standard Pneumatic (6 bar max air supply) / Single Acting

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SRD998 - Intelligent Positioner - SRD998 Series (211)

SRD998 - Universal Positioner - Part number HBD0-C0S-1SA37-A1-L/ - Connection: 1/4 NPT / Communication HART \ Standard Pneumatic (6 bar max air supply) / Double Acting

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SRI986 -Electro-Pneumatic Positioner - SRI986 Series (211)

SRI986 - Electro-Pneumatic Positioner - Part number BIDS7FAANA-1/ - Connection: 1/4 NPT / Signal Range 4 - 20 mA \ Direct Version: Increasing Input increases Output / Single Acting

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Technical Feature of Foxboro Positioner Transmitter

Advantages   Disadvantages 
  • Advanced Diagnostics: Features like predictive maintenance tools, diagnostics for friction and wear, and valve-specific reports help optimize and prevent failures.
  • Ease of Use: They provide a user-friendly, menu-driven graphical LCD and are easy to operate locally with push buttons or remotely.
  • Connectivity and Integration: They support multiple communication protocols like HART, PROFIBUS-PA, and FOUNDATION Fieldbus for seamless integration with various control systems.
  • Safety Features: They are suitable for safety applications up to SIL 3 and include functions like Partial Stroke Test (PST) for emergency shutdown checks.
  • Automatic Calibration: Some models offer auto-start with self-calibration, reducing setup time and improving accuracy compared to manual analog adjustments.
  • Wireless Communication: An infrared interface allows for wireless operation and configuration, which can be useful in certain environments.
 
  • Complexity in Certain Applications: In fast loops, a positioner might degrade response time or cause limit cycling. In these cases, other components like air volume boosters might be more appropriate, according to our internal test.
  • Compatibility Issues: Single-acting positioners may have limitations in highly complex systems or require careful consideration for rapid adjustments, although modern digital positioners have largely addressed these concerns.
  •  Requires Proper Installation: Installation must follow safety regulations to prevent potential hazards from mechanically moved parts and ensure safety features are not rendered ineffective.

 

 

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