Aignep 02F03202E0 Solenoid Valve (2/2 NO, 1/4″, EPDM, PN50): Precision Shut-Off for High-Pressure Media

When a simple 2/2 shut-off valve isn’t enough — and you need a high-pressure valve

⚠️ Attention: not every 2/2 valve holds 50 bar

A common mistake when selecting shut-off valves is picking “any 1/4″ 2/2 solenoid valve” without checking the maximum rated pressure. Most direct-acting valves of this size are rated for 10–16 bar — enough for pneumatics, but not enough for hydraulic circuits, high-pressure steam boilers, or process loops with elevated liquid pressure. Installing an under-rated valve on a 30–40 bar line isn’t “working with a margin” — it’s a direct risk of body or seat failure during operation.

💡 Interest: what’s behind the part number 02F03202E0

Breakdown of the model code 02F03202E0:

• 02F — series: direct acting, brass body
• 03 — size code: corresponds to a 1/4″ connection (G1/4, ISO 228, female thread on both inlet and outlet)
• 2 — configuration: 2/2 — two ports, two positions (open/closed), unlike three-way 3/2 valves with an exhaust port
• 02 — base coil code; the exact voltage (12V DC / 24V AC / 24V DC / 110V AC / 220V AC) and power (8–31 VA/W) are specified at order
• E — seal material: EPDM
• 0 — normally open (NO): the valve is open when the coil is de-energized

The 2/2 NO configuration means: two ports (inlet and outlet), two positions. With the coil de-energized, a spring holds the spool open — the medium flows freely. With voltage applied, the spool fully closes the passage. This is a straightforward shut-off valve with no exhaust-to-atmosphere function — exactly the scheme needed where the flow must either pass or be fully stopped, with no intermediate venting.

❤️ Desire: a valve for conditions a standard 2/2 can’t handle

• Working pressure up to 50 bar (PN50) — five times the typical range of comparable 2/2 EPDM valves
• Minimum actuating pressure 0 bar — direct acting, the coil moves the spool mechanically without relying on the media’s pressure differential
• Media working temperature −10…+140°C — steam, hot water, process fluids
• Coil insulation class H (up to +180°C) — one step above the class F used in standard versions of the series
• Return spring in stainless steel — corrosion resistance for long-term operation on wet and steam lines
• Flexible coil choice: from 12V DC to 220V AC — for any automation system without reworking the pipework

🤔 Objection: “I already have a standard 2/2 valve — why pay extra for PN50?”

If the line runs at 4–6 bar, the extra cost isn’t justified — a standard version will do. But if it’s a hydraulic or steam circuit running at 20–40 bar, the difference won’t show up right away — it will show up at the point of failure. An under-rated valve can hold the line for months and then fail under a pressure spike or water hammer, which in a steam or hydraulic circuit means not just a leak but a potentially hazardous failure. PN50 isn’t a “just in case” marketing figure — the valve is designed and tested for exactly that pressure.

✅ Solution: genuine Aignep 02F03202E0 from Acvatron SRL

Acvatron SRL supplies genuine Aignep products in Moldova. The 02F03202E0 valve is available to order, shipped in original packaging with a product data sheet. Aignep is an Italian manufacturer with a long track record of supply to the food, chemical, energy, and hydraulic industries across Europe.

🛒 Action

Buy Aignep 02F03202E0 at acvatron.md → Acvatron SRL’s specialists will help you select the right coil voltage and confirm the parameters for your process circuit.

Technical specifications

Advantages and key strengths

1. Fivefold pressure margin. PN50 against the typical 10 bar of most 2/2 valves of similar size — enabling use on hydraulic and steam circuits where standard solenoid hardware doesn’t meet the spec.
2. Simple, reliable 2/2 scheme. No third port, no distribution logic — minimal failure points, important for pure shut-off tasks (emergency isolation, dosing, bypass).
3. Class H insulation. The coil tolerates a higher self-heating temperature and ambient temperature without losing service life — relevant when the valve is mounted in hot zones of equipment.
4. Thread-compatible with existing pipework. Standard G1/4 thread to ISO 228 on both ports — a direct replacement in most existing piping assemblies without re-threading.

5 reasons to choose the Aignep 02F03202E0 from Acvatron SRL

1. PN50 — a valve for pressures where standard solenoid hardware won’t work

Most 1/4″ direct-acting 2/2 valves with EPDM seals are rated for 10–16 bar. The 02F03202E0 holds up to 50 bar — opening up applications on hydraulic pilot lines, elevated-pressure steam boilers, and process circuits with high liquid overpressure, where standard pneumatic hardware falls short.

2. EPDM — a must for steam and hot water

EPDM (ethylene propylene rubber) handles a working range up to +150°C in steam and hot water — conditions in which NBR already breaks down at +90°C. For steam and high-temperature water circuits, EPDM is the industry standard, and this valve delivers it in a high-pressure version.

3. Direct acting — operates from zero pressure differential

Indirect (servo-assisted) valves require a minimum differential of 0.3–0.5 bar to actuate. The 02F series’ direct action — the coil mechanically moves the spool — ensures reliable actuation at ΔP = 0 bar. Critical for gravity-fed lines, condensate systems, and sections with low pressure differential.

4. 2/2 NO configuration — simple, predictable shut-off

With no third exhaust port, the valve either passes flow or stops it completely. The normally open (NO) version means: on loss of power, the valve stays open and the medium keeps flowing — a standard requirement for circuits where stopping flow on power loss is unacceptable (cooling circuits, continuous steam-supply lines for sterilization).

5. Class H insulation and stainless spring — service life in harsh conditions

Class H insulation (up to +180°C) gives a margin where the coil is mounted near hot equipment or operates in sealed cabinets without forced cooling. The stainless steel return spring doesn’t lose elasticity from prolonged contact with condensate and moisture — unlike carbon steel, which is prone to corrosion in steam assemblies.

Application areas

Decoding the 2/2 NO configuration: how the valve works

Position 1 — coil de-energized (normal state)

A spring holds the spool open. Port 1 (inlet) → Port 2 (outlet): the medium flows freely.

Position 2 — coil energized

The electromagnetic field pulls in the armature, compressing the spring. The spool closes the passage between the ports. Flow of the medium is fully stopped.

Note: unlike a 3-way valve (for example, the Aignep 02F03425E0, 3/2 NO), there is no third exhaust port here — the valve does not vent pressure to atmosphere, it simply shuts off the line. For controlling a pneumatic actuator (supply/exhaust on one cylinder port), you need a 3/2 or 5/2 valve; for pure flow shut-off in a pipeline, use a 2/2 valve like this model.

Expert opinion

Vitalie Boluchevschi — mechanical engineer, 18 years of experience servicing compressor, pneumatic, and process equipment

“A 2/2 valve is often mistaken for a ‘stripped-down’ 3/2 — in reality they’re different jobs. If you just need to shut off a line — bypass, drain, emergency isolation — go with a 2/2; the extra exhaust port on a three-way valve isn’t needed there and doesn’t help. I also point customers to the pressure rating specifically: PN50 on this model isn’t a ‘just in case’ margin, it’s a concrete technical limit confirmed by the manufacturer. If you have a hydraulic pilot circuit at 25–30 bar, a standard 10-bar 2/2 valve simply doesn’t fit there physically, even if the thread and connection match. Check not just the thread and seal material, but the PN rating too — that’s the parameter most often missed when selecting a replacement.”

Standards compliance: EN 60730-1 (automatic electrical controls), ISO 228 connection standard, coil insulation class H per IEC 60085, RoHS directive.

Frequently Asked Questions (FAQ)

What’s the difference between the 02F03202E0 and the 02F03425E0 valve?

The 02F03425E0 is a three-way 3/2 NO valve with an exhaust port, rated up to 10 bar: suited for pneumatic control (supply/exhaust pressure to an actuator). The 02F03202E0 is a two-way 2/2 NO valve with no exhaust, for pure flow shut-off, but rated for a working pressure of up to 50 bar — meaning tasks that need reliable high-pressure line shut-off rather than distribution logic.

Why do I need a 50-bar valve if my system runs at 6 bar?

If your circuit’s working pressure doesn’t exceed 10–16 bar, paying extra for PN50 isn’t worthwhile — the standard version of the 02F series is enough. PN50 matters for hydraulic pilot lines, elevated-pressure steam boilers, and circuits where brief pressure spikes (water hammer) can exceed the rating of ordinary pneumatic hardware.

What’s the difference between insulation class H and class F?

Class F allows the coil winding to heat up to +155°C, class H up to +180°C. The difference shows up when the valve is mounted in hot equipment zones or in sealed, unventilated electrical cabinets: a class H coil retains its service life where a class F coil might overheat under long continuous operation.

Can a 2/2 valve be used instead of a 3/2 to control a cylinder?

Not directly. A 2/2 valve has only an inlet and an outlet — it doesn’t vent pressure to atmosphere and isn’t suited for controlling a single-acting pneumatic actuator, which requires alternating supply and exhaust. For controlling cylinders, use 3/2 or 5/2 distributors (for example, an Aignep 02F series valve in a 3-way configuration).

Which coil voltage should I choose for the 02F03202E0?

The model is available with 12V DC, 24V AC, 24V DC, 110V AC, and 220V AC coils — the specific version is specified at order, based on your automation system’s voltage. Acvatron SRL’s specialists will confirm and select the right coil option before shipment.