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Home /Products/Pneumatic Control Valves/IMI STI SA/CL Analog Positioner for Linear Actuator Dual Acting Petrochemical Thermal Power Plant

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
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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

Rating Snapshot

The following is the distribution of all ratings
5 stars
100%
4 stars
0%
3 stars
0%
2 stars
0%
1 stars
0%

All Reviews

N
Nicolas Herreros
Chile Aug 1.2025
Helpful (5)
We receive exactly what we buy
A
Alaim Alves
Brazil Jul 12.2025
Helpful (8)
ok
A
Anggoro Fikri,Indonesia
Indonesia Jul 4.2025
Helpful (35)
Just wanted to say thanks for the smooth service. Your team knows the products inside out, replies are always quick, and shipments arrive on time. Makes working with you easy.
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