Suntec R642NL Solenoid Shut Off Valve | 120V for A & B Pumps (R642NLB)
📝 Product Description
The Suntec R642NL Solenoid Shut Off Valve (new part number R642NLB) provides precise fuel cutoff for Suntec A and B Series pumps. Rated up to 300 PSI, this 120V valve ensures reliable operation for residential and light commercial burners. Compatible with #2 heating oil and lighter fuels, and now supports biodiesel blends up to 20%, making it ideal for modern eco-friendly fuel systems.
The kit includes the solenoid coil 3713824 (3713824-SAV), rated 110/120V, 50/60Hz, 9 Watts, with IP54 protection. With a capacity of 16 GPH and 22.5" lead length, installation is straightforward on compatible pumps.
⚠️ Important Note
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All R642NL units come in a box labeled R642NLB.
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The shut-off valve itself is labeled R642N-B.
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Now accepts biodiesel blends up to 20%.
✅ Key Features
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✅ Fuel Compatibility: #2 heating oil or lighter, up to 20% biodiesel
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✅ Voltage: 120V, 0.12 Amp, 50/60 Hz
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✅ Pressure Rating: Up to 300 PSI (except delay models at 150 PSI)
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✅ Pump Compatibility: Suntec A & B Series pumps
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✅ Capacity: 16 GPH
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✅ Lead Length: 22.5 inches (no jacket)
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✅ Solenoid Coil Included: 3713824 (3713824-SAV), IP54 rated
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✅ Durable & Reliable: Safe operation under standard fuel temperatures (up to 75°F / 24°C)
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✅ New Part Number: R642NLB (valve labeled R642N-B)
📊 Specifications Table
| Category | Details |
|---|
| Model / Part Number |
R642NL / R642NLB |
| Voltage |
120V, 0.12 Amp, 50/60 Hz |
| Max Pressure |
300 PSI |
| Flow Capacity |
16 GPH |
| Lead Length |
22.5 inches |
| Solenoid Coil |
3713824 / 3713824-SAV, 110/120V, 9W, IP54 |
| Fuel Compatibility |
#2 heating oil or lighter, B20 biodiesel |
| Pump Compatibility |
Suntec A & B Series (except delay models) |
| Max Fluid Temp |
75°F (24°C) |
⚠️ Common Symptoms (When to Replace)
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Burner fails to shut off fuel properly (run-on after shutdown)
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Valve fails to open, preventing burner startup
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Intermittent or inconsistent burner operation
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Solenoid coil buzzing or no electrical response
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Fuel leakage around the valve connection
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Poor burner performance or uneven flame
❓ Frequently Asked Questions (FAQ)
Q1: What pumps can this solenoid valve be installed on?
➡️ Fits all Suntec A & B Series pumps rated up to 300 PSI, except delay models rated at 150 PSI.
Q2: Can this valve handle biodiesel?
➡️ Yes, now compatible with biodiesel blends up to 20%.
Q3: What is included in the kit?
➡️ The valve R642N-B and solenoid coil 3713824 (3713824-SAV).
Q4: What is the max fluid temperature?
➡️ Rated for fluids up to 75°F (24°C).
🛒 Shopping Tips
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🔧 Verify your Suntec pump model before purchase to ensure compatibility.
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🌱 Supports modern eco-friendly fuels (up to B20 biodiesel).
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🧰 Professional installation recommended for safe and proper setup.
