The Siemens 73N12F is a compact, top-loading pneumatic valve positioner engineered for precise control of linear actuated valves. It operates on a direct-acting, single-axis force-balance principle to ensure fast, accurate, and stable valve positioning in response to pneumatic control signals. Cross-listed with Moore Products, this model is well-regarded for its robust construction and reliable performance in demanding process control environments.
Technical Specifications
- Model: 73N12F
- Input Signal Range: 2 to 12 psi (standard)
- Operation Type: Direct acting
- Mounting: Top-loading, mounts directly on valve actuator topworks
- Control Principle: Single-axis, force-balance
- Valve Stroke Range: 1/4 inch to 4 inches (via interchangeable range springs)
- Feedback: Mechanical feedback for continuous position correction
- Compatible Instrument Span: 2 to 24 psi (with appropriate spring)
- Housing: Compact, enclosed design with no exposed linkages
Key Features
- Direct-acting, force-balance mechanism ensures immediate response and stable control
- Supports a variety of instrument spans and stroke ranges via spring selection
- Top-loading design simplifies installation and alignment on valve actuators
- Integrated feedback loop maintains accurate valve positioning
- No external levers or exposed mechanisms, reducing mechanical wear and maintenance
- Cross-compatible with Moore Products-style installations
Compatible Components & Accessories
- Siemens or Moore-style pneumatic control actuators
- Linear globe or diaphragm control valves
- Range spring kits for varying valve strokes and instrument spans
- Position feedback transmitters and I/P transducers (if needed)
Industry Applications
- Process control in chemical and petrochemical plants
- Steam and water flow regulation in power generation
- Pulp and paper mill valve control systems
- HVAC and district energy valve actuation
- General industrial valve modulation in fluid and gas processes
Installation & Maintenance Notes
- Mount directly to valve topwork using appropriate hardware—no external brackets required
- Select correct range spring based on valve stroke and control span requirements
- Ensure clean, dry air supply for optimal pneumatic response
- Periodically inspect internal feedback and spring integrity
- Calibrate after installation or if performance drift is detected
We ship this product worldwide! Delivery is normally stock.
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