ODE 5315A0V25 Solenoid Valve — 2/2 NO, G 1/4″, for Screw Compressors 11–22 kW

What This Valve Does in a Screw Compressor

The 5315A0V25 solenoid valve performs a critical function in the intake/unload control system of a screw compressor. Depending on the specific circuit, it operates as:

Intake valve During loaded operation the valve is open — air flows freely into the compressor block inlet. When the compressor transitions to unload (idle) mode, the valve closes and shuts off the air supply — the compressor continues rotating without load, consuming no energy for compression.

Unloader valve In some circuits the valve controls the pressure bleed line from the oil separator when transitioning to idle — this reduces motor load during restart under pressure.

The NO (normally open) type is critical for this function: when de-energised (emergency power cut), the valve opens — the compressor can continue operating or stop safely without the intake being blocked.

💡 Important: do not confuse with an NC (normally closed) valve — this application strictly requires the NO type. Fitting an NC valve will prevent the compressor from building pressure if power to the coil is lost.

Why the Original Valve Fails

The intake valve is one of the most heavily loaded components in the compressor control system. It actuates at every load/unload transition:

• Seal wear — operating with hot oil-laden air, the FKM seal gradually loses elasticity. Symptom: the valve begins to leak air in the closed position; the compressor fails to reach full pressure during unloading
• Seat fouling — oil deposits and particles block the movable core. Symptom: valve fails to actuate or actuates with a delay
• Coil failure — overheating from prolonged operation or a voltage spike. Symptom: no actuation when voltage is applied
• Body corrosion — when condensate enters the valve body. The brass body of the ODE 5315A0V25 is corrosion-resistant

OEM Compatibility: Direct Replacement for Which Compressors

The valve is suitable for screw compressors rated 11–22 kW from the above manufacturers. Before ordering, verify the valve part number on your compressor body or in the service documentation.

⚠️ Compatibility check: confirming OEM part number compatibility is the buyer’s responsibility. If in doubt — provide the compressor model and serial number to an Acvatron SRL engineer: +373 22 503-580.

ODE 5315A0V25 Technical Specifications

Voltage and Configuration Options

Two parameters must be specified when ordering:

Coil voltage:

• 12V DC — low-voltage control electronics
• 24V DC — industrial automation standard
• 24V AC 50/60 Hz — European low-voltage control circuits
• 110–120V AC 50/60 Hz — North American standard (some export compressor versions)
• 230–240V AC 50/60 Hz — European and Moldovan power standard

💡 For most Elgi and Chicago Pneumatic compressors operated in Moldova and Europe, the coil voltage is 230V AC.

DIN connector option:

• None — no connector, valve body only
• Cable Grip DIN IP65 — with cable entry, IP65 protection
• Cable Grip DIN IP67 — with cable entry, IP67 protection (where water contact is possible)
• LED DIN — with actuation indicator light (convenient for service diagnostics)
• ATEX Ex nA DIN — explosion-proof version

5 Reasons to Choose the ODE 5315A0V25

1. Direct OEM replacement with no modifications The valve is identical in dimensions, thread, and electrical characteristics to the original Elgi and Chicago Pneumatic parts — fits in place without additional adapters or wiring changes.

2. Italian ODE quality — reliability above alternatives ODE is an Italian manufacturer of industrial solenoid valves with a long-established track record. ODE series 53 valves are used in compressors, refrigeration equipment, and industrial automation worldwide. Service life significantly exceeds budget alternatives from China.

3. FKM seals — resistant to hot oil-laden air In the intake system of a screw compressor, the valve operates with an air-oil mixture at temperatures of 60–100 °C. FKM (Viton) maintains its elasticity and sealing performance under these conditions throughout the valve’s service life.

4. Wide choice of voltages and configurations Available from 12V DC to 230–240V AC, plus ATEX execution for hazardous areas — one part number covers virtually any compressor configuration.

5. CSA, UL, CRN certifications — meets international requirements For service centres operating to international maintenance standards, certified spare parts are a mandatory requirement for in-warranty and post-warranty service.

Signs of Intake Valve Failure in a Compressor

Failure of the 5315A0V25 valve can be identified by the following symptoms:

• Compressor does not transition to unload (idle) mode — valve stuck open; air continues entering the block when unloading is attempted
• Compressor does not build pressure — valve stuck closed (on an NO type this can occur with a seized core); air is not reaching the block inlet
• Coil is hot but valve does not actuate — mechanical core fault or seat fouling
• Coil is cold, signal is present — coil winding open circuit; coil or complete valve replacement required
• Compressor trips on a pressure fault — valve is passing air into the bleed line under load

Expert Opinion

„The ODE 5315A0V25 is one of those components where cutting costs is a false economy. When an Elgi or Chicago Pneumatic compressor owner comes in with ‘won’t hold pressure on unload’ or ‘won’t go to idle’ — in 70% of cases the problem is the intake valve. A budget Chinese alternative costs half the price and fails within 3–6 months: the FKM imitation loses its elasticity from the hot oil and the valve starts leaking. A genuine ODE with true FKM Viton seals runs 2–3 years and more. One more important point: when replacing, always check the coil separately first — sometimes the valve body is mechanically fine and it’s only the coil that has burned out. That saves money: a coil costs significantly less than a complete valve assembly.”

Vitaly Boluchevsky, Chief Engineer at Acvatron SRL, 15 years in the industry

FAQ

❓ What coil voltage should I order for an Elgi / Chicago Pneumatic compressor in Moldova? The standard control circuit voltage on Elgi and Chicago Pneumatic compressors in European configuration is 230V AC 50 Hz. Verify the voltage on the valve nameplate or in the compressor wiring diagram before ordering. If in doubt — call: +373 22 503-580.

❓ How does the ODE 5315A0V25 differ from similar valves in other ODE series? ODE series 53 are small direct-acting valves (G 1/4″–G 3/8″) for compressed air, gases, and light oil-containing media. A functionally similar valve from a different series may have different dimensions, a different seat, or a different connector type — even a minor difference rules out interchangeability. Always use the exact part number 5315A0V25.

❓ Can the coil be replaced without changing the valve body? Yes, if the valve body is in good condition (no corrosion, deformation, or mechanical damage). ODE coils for the series 53 are sold separately. Ask an Acvatron SRL manager for the coil part number — we will identify the compatible model.

❓ Does the compressor need to be shut down to replace the valve? Yes. Before replacement: stop the compressor, bleed system pressure to zero, allow the valve to cool (it is located in the hot air/oil zone), and isolate the control cabinet from power. Only then proceed with valve replacement.

❓ Which DIN connector option should I choose? For a standard replacement in a compressor station environment — Cable Grip DIN IP65 (standard industrial protection). If water contact is possible during equipment washing — IP67. If visual actuation indication is needed for service diagnostics — LED DIN.