SRI986-BIDS7ZZZNA FOXBORO Electro-Pneumatic Positioner

Description

SRI986-BIDS7ZZZNA FOXBORO Electro-Pneumatic Positioner

Product Dimensions：

Product Description (Detailed Explanation)

The SRI986 series is an analog-based positioner known for its ruggedness and simplicity. Unlike microprocessor-based smart positioners, the SRI986 uses a force-balance principle with a high-gain pneumatic relay.

The specific configuration BIDS7ZZZNA indicates a version built with an aluminum housing, intrinsic safety certifications, and standard metric cable entries. It is compatible with both linear and rotary actuators. This model is often preferred in environments where digital complexity is not required, but mechanical durability and fast pneumatic response are essential.

Product Parameters (Technical Specifications)

Product Advantages (Key Benefits)

• Robust Analog Engineering: The absence of complex software and LCD screens makes it immune to digital glitches and software “hangs,” ensuring high uptime.

• Rapid Response Time: The high-capacity pneumatic relay allows for fast movement of large actuators, which is critical for tight process loops.

• Extreme Vibration Resistance: Its mechanical force-balance mechanism is specifically dampened to withstand the high-vibration environments typical of steam lines and compressor stations.

• Easy Maintenance: Components like the nozzle-flapper and pneumatic relay can be easily cleaned or replaced in the field without specialized computer tools.

• Global Compatibility: Meets international safety standards (ATEX/IECEx) for use in hazardous areas (Zone 1 and 2).

Precautions (Important Notes)

• Instrument Air Quality: Air must be dry, clean, and oil-free according to ISO 8573-1. Contaminated air is the #1 cause of failure for the nozzle-flapper assembly.

• Calibration Stability: Because this is a mechanical balance device, Zero and Span should be checked periodically, especially after a period of extreme temperature fluctuations.

• Safety Barrier: For use in hazardous areas, the device must be connected via a certified Zener barrier or galvanic isolator.

• Ventilation Hole: Never plug the exhaust or vent holes on the housing. Proper venting is required for the pneumatic balance and to prevent pressure buildup inside the enclosure.

Product Applications (Typical Use Cases)

• Oil & Gas Refineries: Controlling flow rates in fuel pipelines and crude oil processing units where explosion protection is mandatory.

• Chemical Plants: Precise dosing of reactants into high-pressure vessels where corrosive atmospheres may exist.

• Power Generation: Regulating steam valves and cooling water systems where high vibration and high temperatures are present.

• Water Treatment: Operating large butterfly or ball valves for main line flow control.

• Pulp & Paper: Managing slurry flow in bleaching and digestion sections where reliable, simple operation is prioritized over digital diagnostics.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

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