73N12F-moore
Siemens+Moore Pneumatic Valve Positioner 73N12F
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Siemens+Moore Pneumatic Valve Positioner 73N12F
Home > Siemens > Valve Positioners > 73N12F Need Siemens+Moore 73N12F? Pneumatic Valve Positioner for Series 73F pneumatic valve positioning. Supplied…
Specifications
| Brand | Siemens+Moore |
|---|---|
| Model Number | 73N12F |
| Official Product Name | Series 73F Built-in Pneumatic Valve Positioner Complete Original Unit |
| Applicable System | Series 73F pneumatic valve positioning |
| Product Type | Pneumatic Valve Positioner |
| Equivalent Standard | Contact us for cross-reference and alternative models |
| Product Status | Available on request |
| Model | 73N12F |
| Type | Built-in pneumatic valve positioner, top-loading, direct-acting |
| Instrument Input Range | 3-15 psig (options 3-9, 9-15, 6-30, 3-27 psig) |
| Input Span (73N12F) | 2 to 12 psi |
| Valve Travel | 1/4 in (min) to 4 in (max) |
| Supply Pressure | Minimum 3 psi above required actuator pressure; maximum 100 psig |
| Air Consumption | 0.25 scfm (balanced, 20 psig supply, 9 psig dead-ended output) |
| Response Level | 0.1% of input span |
| Overrange Limit | 150 psig to any connection |
| Ambient Temperature | -40 degF to +180 degF (-40 degC to +82 degC) |
| Materials of Construction | Aluminium, brass, stainless steel, Neoprene and/or Buna-N |
| Series | Series 73F (Model 73) |
Product Description
It operates on a single-axis force-balance principle and uses the full air supply (up to 100 psig) to drive and hold a piston or diaphragm actuator at the position demanded by the control instrument signal. The '12F' model is a top-loading, direct-acting version for input spans of 2 to 12 psi with fast response for large-volume actuators. It supports valve travel from 1/4 inch to 4 inches and is built from aluminium, brass, stainless steel and elastomer materials. The Siemens Moore 73N12F is a built-in pneumatic valve positioner from the Series 73F line, mounted directly on the topwork of a control valve with no external levers or exposed mechanisms.
Basic Product Information
- 'F' fast-response design with enhanced pilot plunger travel and larger ports for large-volume actuators
- Range spring selection accommodates valve strokes from 1/4 in to 4 in and spans from 2 to 24 psi
- Mounts directly on the valve topwork with no external levers or exposed mechanisms
- Operates on supply air up to 100 psig to stroke pneumatic piston or diaphragm actuators
- Optional tapped exhaust available for noxious-gas control media
- Single-axis force-balance principle for accurate and stable control valve positioning
Technical Specifications
Version & Model Difference
Within the Series 73 family the suffix defines the function: 73N12F is top-loading, direct-acting for input spans of 2 to 12 psi; 73N24F covers spans above 12 to 24 psi; 73N-FR is top-loading reverse-acting; and 73N-B / 73N-B1 are bottom-loading versions. The 'F' denotes the fast-response variant suited to actuators with large-volume topworks.
Application Scenarios
- Flow, temperature and pressure control loops in process plants
- Control valve actuation in chemical, petrochemical and power plants
- Fast-response positioning of large-volume pneumatic actuators
Frequently Asked Questions
What input signal does the 73N12F use?
The 73N12F is set for a 2 to 12 psi input span and accepts instrument input ranges of 3-15, 3-9, 9-15, 6-30 or 3-27 psig depending on the range spring fitted.
What valve travel is supported?
With the correct range spring the positioner supports valve travel from 1/4 inch minimum to 4 inches maximum.
What supply pressure and air consumption does it need?
Supply pressure must be at least 3 psi above the required actuator pressure and must not exceed 100 psig; air consumption is about 0.25 scfm in the balanced condition.
Is this a top-loading or bottom-loading positioner?
The 73N12F is a top-loading, direct-acting model. Bottom-loading applications use the 73N-B or 73N-B1 variants.
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