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IMI STI SA/CL Analog Positioner for Linear Actuator Dual Acting Petrochemical Thermal Power Plant

1
MOQ
2830-2870$ per set
Price
IMI STI SA/CL Analog Positioner for Linear Actuator Dual Acting Petrochemical Thermal Power Plant
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Features
Specifications
Input Signal: 3-15 Psi Pneumatic Or 4-20 MA Electrical Signal
Standard Operating Temperature: -20°C To 70°C, Custom Range Available On Request
CV Max Low Flow: ND 1/4" Inlet 0.34 Outlet 0.34; ND 1/2" Inlet 0.637 Outlet 0.79
Feeding Connection: ND 1/4" For SA/CL-2, ND 1/2" For SA/CL-1
Supply Pressure: 2.5 To 7 Bar
Linearity: 1% Of The Full Stroke
Hysteresis: 0.5% Of Full Stroke
Sensitivity: 0.2% Of Signal Range
Electrical Connection: ND 1/2" NPTF
Accessories Available: Air Lock Change Over Plate Customised Cam Pressure Gauges
Highlight:

IMI STI SA/CL analog positioner

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dual acting positioner for linear actuator

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petrochemical thermal power plant positioner
Basic Infomation
Place of Origin: Italy
Brand Name: IMI STI
Model Number: SA/CL
Document: IMI STI SA CL Positioner.pdf
Payment & Shipping Terms
Packaging Details: Carton/Wooden Case Packaging
Delivery Time: 6-8 weeks
Payment Terms: T/T
Supply Ability: 800 sets per year
Product Description
The IMI STI SA/CL Analog Positioner is a robust, heavy-duty analog valve positioner designed for precise control of pneumatic actuators in demanding industrial environments.
Product Overview

The IMI STI SA/CL is a high-performance analog positioner available in both pneumatic and electro-pneumatic versions. Engineered for linear actuators (typically with stroke lengths over 70mm), it provides accurate valve positioning using a classic force-balance principle. Built with a metallic housing and heavy-duty construction, the SA/CL excels in harsh conditions, delivering reliable, stable performance for process control applications. It is suitable for double-acting configurations (and can be adapted for single-acting use), making it a trusted choice in industries requiring durability and precision.

Features
  • Heavy-duty metallic case for maximum durability in aggressive environments
  • IP65 protection as standard, with options for explosion-proof and intrinsically safe certifications
  • Double-acting design (adaptable for single-acting applications)
  • High vibration and shock resistance
  • Full stainless steel spool valve options (for ND 1/4" and ND 1/2" versions)
  • Action inversion without tubing changes (on select models)
  • Air purge version available for enhanced protection in dusty/sandy conditions
  • Sandstorm execution option for extreme desert or abrasive environments
  • Low air consumption and fast response time
  • Simple calibration and maintenance
Technical Specifications
Specification Detail
Input Signal3-15 psi (pneumatic) or 4-20 mA (electro-pneumatic)
Supply PressureTypically 20-100 psi (depending on configuration)
OutputPneumatic to actuator
Stroke RangeOptimized for linear actuators with stroke >70mm (up to specific model limits)
Linearity / Hysteresis / RepeatabilityHigh accuracy typical of analog force-balance design (commonly <1% FS)
EnclosureMetallic housing, IP65 standard
Operating TemperatureWide range suitable for industrial use (often -20°C to +80°C or extended with options)
Air Connections1/4" NPT or G threads (model dependent)
Fail-safe ModesAvailable configurations for fail-open, fail-close, or stay-in-place
OptionsATEX/IECEx explosion-proof, intrinsically safe, stainless steel components, special executions

(Note: Exact values may vary by specific configuration; consult official IMI STI datasheet for your model variant.)

Applications
  • Oil & Gas (onshore/offshore platforms, refineries)
  • Petrochemical and chemical processing plants
  • Power generation (conventional and combined cycle)
  • Pulp & paper industry
  • Water & wastewater treatment
  • General heavy industrial process control where reliable valve actuation is critical in harsh or hazardous areas
FAQ

Q: Is the SA/CL suitable for rotary actuators?

A: No, it is specifically designed for linear actuators with longer strokes (>70mm). For rotary applications, consider other IMI STI models.

Q: Can it be used in explosive atmospheres?

A: Yes, explosion-proof and intrinsically safe versions are available to meet ATEX/IECEx requirements.

Q: What is the main advantage over digital/smart positioners?

A: The SA/CL offers simple, reliable analog operation with no electronics complexity, making it ideal for applications where robustness and low maintenance are prioritized over advanced diagnostics.

Q: Does it support fail-safe operation?

A: Yes, depending on piping and spring-return actuator setup, it supports fail-open, fail-close, or lock-in-last-position modes.

Q: How do I calibrate the positioner?

A: Calibration is straightforward using zero and span adjustments; detailed instructions are provided in the installation manual.

Contact Us

For inquiries, quotations, technical support, or ordering, please reach out:

WeChat / WhatsApp / Phone: +86 13472860702

Related Products
  • IMI STI SA-1 Analog Positioner (compact version for shorter strokes)
  • IMI STI Smart Series (digital/ HART/FOUNDATION Fieldbus positioners)
  • IMI STI Pneumatic Actuators (SC/FC/SCN series linear actuators)
  • IMI STI Limit Switch Boxes and Solenoid Valves
  • IMI STI Electro-Pneumatic I/P Converters

We are ready to assist with custom configurations and integration solutions for your valve automation needs!

Ratings & Review

Overall Rating

5.0
Based on 50 reviews for this supplier

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FLOWSERVE MARK ONE Linear Globe Angle Control Valve Spring Cylinder Valve Pneumatic Actuator
Switzerland Dec 1.2025
Helpful (5)
great price and fast delivery
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