Kaeser Control Line Kit Replacement – 403620.0

Kaeser 403620.0 – Control Line Kit

The Kaeser 403620.0 Control Line Kit is a pneumatic control-line assembly used in Kaeser rotary screw compressors. Its main purpose is to transmit controlled pneumatic pressure signals between the compressor’s control valves, regulators, pressure-sensing components, unloaders, and actuators.

Working Process:

During compressor start-up, the control system establishes the required pneumatic pressure within the control circuit. The control lines transmit this pressure signal to the relevant pneumatic valves and actuators, allowing the compressor to start under reduced-load conditions.

Once the compressor reaches operating speed, the control pressure changes according to the compressor’s operating sequence. The signal travels through the control lines to the inlet-control and unloading mechanisms, allowing the compressor to begin loaded operation.

During loaded operation, the compressor continuously responds to changes in system pressure and compressed-air demand. The control-line circuit transfers the pneumatic signals required to operate the regulating components and maintain the desired discharge pressure.

When the required system pressure is reached, the control system changes the pneumatic signal. The unloader or inlet-control mechanism responds by restricting the compressor’s air intake. This reduces the compression load and places the compressor into an unloaded condition, helping reduce unnecessary power consumption.

When compressed-air demand increases and system pressure falls, the control pressure changes again. The connected pneumatic actuator or control valve responds and allows the compressor to return to loaded operation.

The 403620.0 Control Line Kit therefore functions as the pneumatic communication path within the compressor control system. It does not normally handle the main compressed-air flow; instead, it transfers the smaller control-air pressure signals needed for automatic compressor regulation.

Parts references list 403620.0 specifically as a Kaeser Control Line Kit for rotary screw compressors.

The control tubing and fittings operate under continuous pressure fluctuations and are exposed to compressor vibration, heat, oil mist, and mechanical movement. Over time, tubing can become brittle, cracked, kinked, abraded, or contaminated. Connections may also loosen and develop air leakage.

A leaking or damaged control line can reduce or interrupt the pneumatic signal reaching a valve or actuator. This can result in delayed loading, failure to unload, unstable pressure regulation, incorrect valve operation, or increased compressor energy consumption.

During maintenance, the compressor should be stopped, electrically isolated, completely depressurized, and allowed to cool before the control-line assembly is serviced. All tubing, fittings, and connections should be inspected for cracks, abrasion, kinks, loose connections, contamination, and leakage.

The replacement components supplied in the 403620.0 kit should be installed in their correct positions and routed according to the applicable Kaeser service procedure. Proper routing prevents sharp bends, excessive vibration, abrasion, and contact with hot or moving compressor components.

After installation, the pneumatic control circuit should be checked for leakage. The compressor should then be operated through its complete start-up, loading, unloading, and shutdown sequence to verify that the control signals and connected valves respond correctly.

A defective control-line assembly can cause loss of pneumatic control pressure and incorrect operation of the compressor’s regulating components.

Correct maintenance using the Kaeser 403620.0 Control Line Kit helps restore reliable pneumatic signaling, accurate valve actuation, stable load/unload operation, reduced control-air leakage, and dependable compressor performance.

Part Number: 403620.0
Brand: Kaeser
Part Description: Control Line Kit
Component Type: Pneumatic control-line assembly
Application: Kaeser rotary screw compressors
Primary Function: Transmits pneumatic control-pressure signals between compressor control components
Operating Function: Supports inlet control, unloading, pressure regulation, and pneumatic actuator operation
Main Benefits: Reliable control signaling, accurate valve operation, stable compressor control, reduced leakage, and dependable compressor performance.

Disclaimer: All manufacturer names, trademarks, model numbers, and part numbers are used solely for identification and compatibility purposes. Our products are high-quality aftermarket replacement products and are not manufactured, sponsored, endorsed, or authorized by the original equipment manufacturer (OEM). All trademarks remain the property of their respective owners.