Loading and Unloading Solenoid Valves for Air Compressors: ODE & CEME Solutions

Loading and unloading valves play an important role in industrial air compressors. They help control when the compressor loads, unloads, vents, or sends pilot air to the intake system, allowing the compressor to respond properly to changing air demand.

Hydronics Depot Inc. supplies a wide range of ODE and CEME loading/unloading solenoid valves used throughout compressor control systems worldwide.

ODE Compressor Valve Series

Several ODE valve families are commonly used in compressor loading, unloading, venting, and pilot-control applications, including:

• ODE 4144
• ODE 4690
• ODE 5315
• ODE 4628
• ODE 5729

These series include 2/2-way and 3/2-way designs, normally open and normally closed configurations, and a variety of port sizes, pressure ranges, voltages, and coil options.

They can be found in compressor applications involving manufacturers such as Chicago Pneumatic, Atlas Copco, Gardner Denver, ELGi, and other major compressor brands.

CEME Compressor Valve Series

CEME also manufactures several valve families suited to compressor air-control applications, including:

• CEME 8323
• CEME 8424
• CEME 8614
• CEME 8624
  

These valves can be used for functions such as loading, unloading, pilot-air control, venting, and pressure management within compressor systems.

Where Are These Valves Used?

ODE and CEME valves can be found in compressor systems from manufacturers such as:

• Chicago Pneumatic
• Atlas Copco
• Gardner Denver
• ELGi
• CompAir
• Ingersoll Rand
• Quincy Compressor
• FS-Curtis
• BOGE
• Kaeser
• Sullair

Depending on the compressor design, the solenoid valve may control the intake or unloader valve, pilot pressure, blow-down circuit, venting system, or the compressor's loaded and unloaded operating cycle.

OEM Part Numbers and Manufacturer Identification

It is common in the compressor industry for components supplied by specialist manufacturers such as ODE or CEME to be incorporated into a compressor assembly and assigned an OEM-specific part number.

For example, ODE 21A1ZV25D-GB corresponds to Gardner Denver VP1108681 in certain compressor applications.

This type of cross-referencing is useful for technical identification, servicing, inventory management, and ensuring the correct component is selected. It also demonstrates how valve manufacturers and compressor OEMs work together within the same supply chain. 

In some cases, a complete compressor valve replacement may not be necessary. ODE offers coils, internal components, and repair kits for many valve families.

Learn more in our blog: “ODE Repair & Maintenance Kits: Why Replace When You Can Repair?”

Hydronics Depot Inc. works with customers, distributors, service companies, and compressor manufacturers to help identify the correct valve based on the application and original equipment requirements.

Genuine ODE & CEME Compressor Valves

Hydronics Depot Inc. supplies genuine Italian-manufactured ODE and CEME valves for compressor loading, unloading, intake control, pilot-air, venting, and blow-down applications.

When replacing or servicing a compressor valve, it is important to confirm the 2/2 or 3/2-way function, normally open or normally closed operation, port size, pressure range, voltage, wattage, seal material, and electrical connection.

If you are unsure which valve is required, send us the compressor manufacturer and model, OEM part number, photos of the valve, coil identification, and voltage, and we can assist with proper identification.

Disclaimer: Compressor manufacturers may use different valves depending on model, production year, and control configuration. Always confirm the exact specifications before purchasing. Contact Hydronics Depot Inc. for exact valve identification if you are unsure.