Panel mounting
Product Overview
Spirax Sarco SA121/SA122/SA128/SA1219 Self-Acting Temperature Control System is an integrated temperature control solution comprising three core components: sensor, actuator, and temperature adjuster/indicator. It can be used with designated series of 2-port and 3-port valves to achieve precise automatic temperature control. The system requires no external power, responding to temperature changes through self-acting principles. It is suitable for temperature regulation needs in various industrial scenarios, featuring compact design, reliable operation, and easy maintenance.
Available Models and Compatibility
Model and Valve Compatibility
| Model | Compatible Valve Type | Valve Nominal Diameter (DN) | Adjuster Location |
|---|---|---|---|
| SA121 | 2-port valve | 15 to 80 | At sensor |
| SA121 | 3-port valve | 20 to 50 | At sensor |
| SA1219 | 3-port valve | 80 to 100 | At sensor |
| SA128 | 2-port valve | 15 to 25 | At sensor |
| SA128 | 3-port valve | 20 to 25 | At sensor |
| SA122 | 2-port valve | 15 to 25 | At valve |
| SA122 | 3-port valve | 20 to 25 | At valve |
| SA122TP | 2-port valve | 15 to 25 | At valve (with PT100 sensor) |
| SA122TP | 3-port valve | 20 to 25 | At valve (with PT100 sensor) |
Technical Specifications
Temperature Ranges and Over-Temperature Protection
| Model | Temperature Range 1 | Temperature Range 2 | Over-Temperature Protection |
|---|---|---|---|
| SA121 | -15°C to 50°C | 40°C to 105°C | 55°C above setpoint, max 190°C |
| SA1219 | -15°C to 50°C | 40°C to 105°C | 55°C above setpoint, max 190°C |
| SA122 | -20°C to 120°C | 40°C to 170°C | 55°C above setpoint |
| SA122TP | -20°C to 120°C | 40°C to 170°C | 55°C above setpoint |
| SA128 | -20°C to 110°C | 40°C to 170°C | 55°C above setpoint, max 190°C |
Environmental and Installation Parameters
| Parameter | Specification |
|---|---|
| Design Ambient Temperature | Min: -35°C; Max: +50°C |
| Capillary Length | Standard: 2m, 4m, 8m; Custom max: 16m |
| Installation Methods | Direct immersion, Indirect immersion, Wall mounting (optional), Duct mounting (selected models) |
Material Specifications
| Component | Material Specification | Remarks |
|---|---|---|
| Sensor | Brass | - |
| Actuator | Brass | - |
| Capillary | Copper (PVC outer protection) | - |
| Adjuster | Polypropylene | - |
| Union | Brass | Optional accessory |
| Mounting Bracket | Steel | Optional accessory |
| Clip | Polypropylene | - |
| Duct Mounting Plate | Steel | Optional accessory |
| Copper (BS 2871 C106), Stainless Steel (BS 3605 CFS 316S 18) | Optional accessory, choice of material | |
| Fill Fluid | Kerosene | - |
Optional Accessories
| Accessory Name | Specification and Purpose | Compatible Models |
|---|---|---|
| Material: Copper/Stainless Steel; Purpose: Protection for indirect immersion installation | All models | |
| Wall Bracket | Material: Steel; Purpose: Wall mounting fixture | All models |
| Dial Adjuster with Pt100 Temperature Sensor | Built-in pocket, precise temperature measurement | SA122TP (standard), optional for other models |
| Union | Includes compression nut, compression ring, ferrule; Purpose: Direct immersion installation | All models |
| Duct Mounting Plate | Includes mounting plate, union, compression ring, compression nut; Purpose: Duct installation | SA121, SA1219, SA128 |
| Long Pocket | Length: from 0.5m (customizable); Includes bracket and rubber plug | SA122 only |
Dimensions and Weight (Approximate)
| Model | Dimension (mm) - A | Dimension (mm) - B | Dimension (mm) - C | Dimension (mm) - D | Dimension (mm) - F | Dimension (mm) - G | Weight (kg) - Excluding Pocket |
|---|---|---|---|---|---|---|---|
| SA121 | 252 | 185 | 310 | 25 | 333 | 28 | 2.0 |
| SA1219 | 350 | 185 | 310 | 25 | 333 | 28 | 2.3 |
| SA122 | 441 | - | 240 | 17 | 271 | 20 | 1.8 |
| SA122TP | 441 | - | 255 | 17 | 271 | 20 | 2.0 |
| SA128 | 252 | 185 | 178 | 25 | 196 | 28 | 1.8 |
Installation Instructions
Installation Requirements
- Detailed installation and maintenance instructions are provided with the product; read carefully and follow operating procedures before installation.
- Multiple installation methods supported: Direct immersion (requires union), Indirect immersion (requires pocket), Wall mounting (requires optional wall bracket), Duct mounting (SA121/SA1219/SA128 require optional duct mounting plate).
- Long pocket (SA122 only) must be specially ordered, minimum length 0.5m, maximum length can be specified as required.
Caution
Avoid excessive bending of the capillary during installation to ensure stable signal transmission.
Ordering Information
Ordering Example
Spirax Sarco SA121 Control System, Temperature Range 2 (40°C to 105°C), with 2m capillary and stainless steel pocket.
Key Ordering Information
Ordering Notes
- Specify product model (SA121/SA122/SA122TP/SA128/SA1219).
- Specify temperature range (Range 1/Range 2).
- Select capillary length (standard or custom length).
- Confirm required accessories (pocket material, mounting bracket, duct mounting plate, etc.).
- Specify accessory requirements for installation method (e.g., union for direct immersion, pocket for indirect immersion).
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