An industrial gas proportional valve is used to control gas flow rate continuously and accurately, according to a control signal (usually 4–20 mA or 0–10 V). It is commonly used in industrial gas burners, boilers, kilns, ovens, and combustion systems.

Here is a clear step-by-step guide on how to use it properly:

1️⃣ Understand How It Works

Unlike an ON/OFF solenoid valve, a proportional valve:

• Adjusts gas flow gradually

• Opens according to electrical input signal

• Maintains stable combustion

• Works together with a controller (PID / burner controller)

Signal example:

• 4 mA = Minimum opening

• 20 mA = Maximum opening

2️⃣ Correct Installation

✔ Install Position

• Follow the arrow direction on valve body (gas flow direction)

• Install horizontally if possible

• Avoid vibration

✔ Before Installation

• Clean pipeline (remove dust, welding slag)

• Install a gas filter before the valve

• Install pressure regulator before valve

Very important for you since you often work with burners:
👉 Dirty gas is the biggest enemy of proportional valves.

3️⃣ Electrical Connection

Check valve specification first:

Common types:

• 24V DC

• 220V AC

• 4–20 mA control

• 0–10 V control

Steps:

1. Connect power supply correctly

2. Connect control signal from burner controller

3. Make sure grounding is good

4. Never connect wrong voltage

Wrong wiring can burn the coil immediately.

4️⃣ Initial Commissioning

Before gas supply:

• Check wiring

• Confirm gas pressure is within valve range

• Check leakage with soap solution

Startup procedure:

1. Open upstream manual valve slowly

2. Turn on control power

3. Send minimum signal (4 mA or 0 V)

4. Slowly increase signal

5. Observe burner flame

Adjust:

• Minimum flow screw (if available)

• Maximum flow screw

• Zero adjustment

5️⃣ During Operation

The proportional valve works together with:

• Gas pressure regulator

• Combustion controller

• Air damper system

Make sure:

• Gas pressure stable

• Control signal stable

• No vibration or overheating

If flame unstable:

• Check gas pressure

• Check filter blockage

• Check control signal fluctuation

6️⃣ Maintenance

To keep it working well long term:

✔ Check gas filter regularly
✔ Keep gas clean and dry
✔ Check coil temperature
✔ Inspect wiring terminals
✔ Check response speed

Recommended:

• Inspection every 3–6 months

• Clean filter monthly (depends on gas quality)

7️⃣ Common Problems & Solutions

8️⃣ Safety Reminder ⚠

• Always install a safety shut-off valve before proportional valve

• Never use as emergency shut-off valve

• Follow local gas safety regulations

• Stop gas immediately if leak detected

Phone: 86 185 6630 3837
WhatsApp: 86 185 66303837
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