SPIRAX SARCO PN600 KG / CM2 RANGE 0 TO 4 20K0018 625 TRANSMITTER

The primary function of the PN600.35 (20K0018) is to convert a mechanical pressure from a process line into a proportional, standardized electrical signal. It measures the pressure in a system and transmits a 4-20 mA DC signal that can be sent to a PLC (Programmable Logic Controller), SCADA system, PID controller, or indicator for:

• Process Monitoring: Displaying the live system pressure.

• Process Control: Automating systems based on pressure readings (e.g., starting/stopping pumps, opening/closing control valves).

• Safety Alarms: Triggering alarms if the pressure goes too high or too low.

2. Key Features and Benefits

• Robust Construction: Designed to withstand harsh industrial environments, including vibration and pulsating pressures common in steam systems.

• High Accuracy: Provides precise and repeatable pressure measurements, essential for efficient process control.

• 4-20 mA Output: This is a industry-standard signal that is highly resistant to electrical interference over long distances. The “live zero” of 4 mA means a 0 mA signal clearly indicates a fault (broken wire, power loss).

• Two-Wire Operation: Simplifies installation as the same two wires are used for both powering the device and carrying the output signal.

• Compact and Lightweight: Easy to install directly onto a process connection or a manifold.

• Wide Range of Process Connections: Typically available with popular connections like G½” or ½” NPT to fit into existing systems.

• Designed for Steam: Spirax Sarco specializes in steam solutions, so this transmitter is well-suited for the challenges of measuring steam pressure, including temperature considerations.

3. Technical Specifications (for model 20K0018)

• Model: PN600.35

• Order Code: 20K0018

• Measured Medium: Liquids, gases, and steam (compatible with the wetted materials).

• Pressure Range: 0 – 4 bar (0 – 4 kg/cm²)

• Output Signal: 2-wire, 4-20 mA DC

• Supply Voltage: Typically 12-30 V DC (required for the 4-20 mA loop)

• Accuracy: Typically ±0.5% of span (common for this class of transmitter).

• Pressure Connection: Likely G½” (BSPP) or ½” NPT female (should be verified on the datasheet).

• Electrical Connection: Likely a M20 x 1.5 or ½” NPT conduit entry.

4. Typical Applications

This transmitter is ideal for any application where reliable and accurate pressure measurement is needed in a 0-4 bar range. Common uses include:

• Steam Boilers: Monitoring outlet pressure.

• Steam Distribution Lines: Monitoring pressure at various points in the plant.

• Heat Exchangers: Controlling the steam pressure supplied to the exchanger.

• Autoclaves and Sterilizers: Critical for process control and safety.

• Industrial Process Vessels: Monitoring pressure in tanks and reactors.

• HVAC Systems: In large commercial heating systems.

5. Why Spirax Sarco?

Spirax Sarco is a world-leading specialist in steam system management. Choosing their transmitter ensures:

• Application Expertise: The product is designed with a deep understanding of steam system dynamics.

• Quality and Reliability: Built for long-term, maintenance-free operation.

• Global Support: Easy access to technical support and spare parts worldwide.