Description
Product Parameters
- Model Number: 130K-N4-LLPF
- Series: 130 Series Consotrol
- Control Action: Proportional plus Reset (PI Control)
- Input Signal: 3 to 15 psi (Pneumatic)
- Output Signal: 3 to 15 psi (Pneumatic)
- Mounting Type: Panel mount (Shelf or individual)
- Air Supply Pressure: 20 psi nominal
- Scale Type: Vertical ribbon indicator for setpoint and process variable
- Enclosure Rating: Designed for hazardous industrial environments
The 130K-N4-LLPF is a high-reliability pneumatic controller designed for precise regulation of pressure, flow, and temperature in legacy industrial processes. Part of the renowned Foxboro Consotrol line, this unit utilizes a force-balance mechanism to compare a 3-15 psi process signal against a mechanical setpoint, generating a corrective pneumatic output. Its “LLPF” designation indicates a specific internal configuration optimized for low-load applications and high-frequency response, ensuring stability even in control loops characterized by rapid fluctuations or minimal downstream volume.
Comparison with Similar Models
The Foxboro 130K series includes various configurations tailored to different loop requirements:
- 130K-N4-LLPF vs. 130P Series: While the 130P is a “pull-out” version intended for quick maintenance and rack mounting, the 130K-N4-LLPF is the standard stationary-mount version known for its mechanical rigidity. The 130K provides a more permanent installation for critical loops where vibration resistance is paramount.
- 130K-N4-LLPF vs. 130M (Manual Station): The 130M is a manual loading station used strictly for remote positioning of valves without automatic feedback. The 130K-N4-LLPF is a fully functional automatic controller capable of managing the process autonomously once the setpoint is established.
- LLPF vs. Standard 130K Models: The LLPF suffix denotes a specialized internal damping and bellows arrangement. Compared to standard models, this version is specifically engineered to handle “low-lead, low-friction” scenarios, providing smoother control action in sensitive gas-flow applications where standard controllers might suffer from mechanical overshoot or oscillation.
