Ingersoll Rand Pressure Regulator Valve Replacement – 35359090

Ingersoll Rand 35359090 – Pressure Regulator Valve

The Ingersoll Rand 35359090 Pressure Regulator is a pneumatic pressure-control component used in portable air compressor systems. Its primary function is to regulate and stabilize the control or downstream air pressure so that connected compressor control components operate within their required pressure range.

Working Process:

During compressor operation, compressed air is supplied to the regulator from the compressor’s pressure/control circuit. The regulator senses the pressure at its controlled outlet side and automatically adjusts the internal valve opening to maintain the required pressure.

When the downstream pressure is below the regulator’s set pressure, the internal regulating mechanism allows additional compressed air to pass through. This increases the controlled pressure and supplies the required pneumatic signal to the connected control system.

As the downstream pressure approaches the preset value, the regulating mechanism progressively restricts the air passage. This prevents the pressure from increasing beyond the required operating range.

If the downstream pressure rises above the regulator’s set point, the internal mechanism further restricts the inlet flow and, depending on the system configuration, allows pressure to be relieved or stabilized. This continuous adjustment keeps the controlled pressure within the required range.

The regulated pressure can be used by pneumatic control components such as unloaders, actuators, valves, or other compressor-control devices. Maintaining a stable control pressure is essential for correct compressor loading, unloading, pressure regulation, and protection functions.

The 35359090 is specifically identified in Ingersoll Rand/Doosan portable-compressor documentation as a pressure regulator. A Doosan/portable compressor parts manual lists 35359090 – VALVE, PRESSURE REGULATOR, while another Ingersoll Rand parts reference identifies it as a pilot valve for 150–200 psig.

Bobcat’s official parts listing identifies 35359090 as a Pressure Regulator for Air Compressors and lists compatibility with models including P125, P185, P260, P100, P130, P175 and XP185.

In certain compressor configurations, the regulator works as part of the pneumatic control circuit. For example, the pressure signal can be used to control an unloader or other air-operated mechanism. By maintaining the correct control pressure, the regulator helps the compressor respond correctly to changes in operating conditions.

During maintenance, the compressor must be stopped, isolated, and completely depressurized before the regulator is removed. The regulator body, inlet and outlet passages, adjustment mechanism, seals, and connections should be inspected for contamination, damage, wear, or leakage.

If the regulator becomes blocked or fails to regulate correctly, the control pressure may become too high or too low. This can cause incorrect compressor loading or unloading, unstable operating pressure, poor capacity control, excessive energy consumption, or failure of connected pneumatic components.

The regulator should be installed with the correct flow direction and adjusted according to the applicable compressor service procedure. After installation, the compressor should be operated and the regulated pressure verified against the manufacturer’s specified setting.

Correct operation of the 35359090 Pressure Regulator helps maintain stable pneumatic control pressure, supports reliable load/unload operation, protects connected control components, and ensures dependable portable compressor performance.

Part Number: 35359090
Alternative/Replacement Reference: 3685-4149 / 36854149
Brand: Ingersoll Rand / Doosan Portable Power
Part Description: Pressure Regulator / Pressure Regulator Valve
Component Type: Pneumatic pressure-control valve
Application: Portable air compressors
Known Compatibility: P125, P185, P260, P100, P130, P175, XP185 and other compatible configurations
Control Function: Regulates pneumatic/control pressure
Primary Function: Maintains a controlled pressure for the compressor pneumatic circuit
Main Benefits: Stable control pressure, reliable load/unload operation, accurate pneumatic control, and dependable compressor performance.

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