How to Use the Imperial F-2013B Royal Belgian Siphon Coffee Maker

If you’ve ever watched a barista brew coffee using a striking glass contraption with a lamp underneath and wondered how it works—or whether you could do it at home—this guide is for you. The Imperial F-2013B Royal Belgian coffee maker is a premium, handcrafted siphon (or vacuum) brewer that combines theatrical brewing with precision extraction. But beyond the visual spectacle, how does it actually affect your cup? Let’s break down how this historic device works, what it needs to perform well, and how to get the most out of it at home.

The Imperial F-2013B is a full-size, hand-blown glass and metal Royal Belgian siphon brewer with an alcohol lamp base. It measures 32 × 21 × 41 cm, weighs 2.28 kg, and comes in multiple finishes including noble silver, noble gold, and optional hand-cranked burr grinder bundles. It’s designed for full immersion vacuum brewing using an alcohol-fueled heat source and requires careful timing and technique to extract balanced, clean coffee.

What Is the Imperial F-2013B Royal Belgian Siphon?

The Imperial F-2013B is a classic Belgian royal-style siphon coffee maker, also known as a vacuum pot. It consists of two glass chambers—one for water (bottom), one for coffee grounds (top)—connected by a filter and tube. When heated with the included alcohol lamp, vapor pressure forces water up into the upper chamber to brew with the coffee. Once removed from heat, the brewed coffee is sucked back down through a cloth or metal filter into the lower chamber, resulting in a clean, bright, and fully extracted cup. The ‘Royal Belgian’ designation refers to its traditional, ornate design with polished metal frames and high-quality glassware.

Key Features and Specifications

The F-2013B is a premium-grade brewer made primarily of glass and metal. Its specifications include:

• Model: F-2013B
• Brand: Imperial
• Material: Glass (brew chambers) and metal (frame, lamp)
• Color options: Noble silver, noble gold, with or without a hand-cranked grinder
• Dimensions: 32 cm (H) × 21 cm (W) × 41 cm (L)
• Weight: 2.28 kg
• Heat source: Built-in alcohol lamp (no electricity required)
• Brew type: Full-immersion vacuum / siphon

It’s categorized specifically as a ‘Belgian Royal’ siphon, distinguishing it from simpler or modern designs by its classic proportions and aesthetic detailing. The optional hand-cranked grinder adds convenience for a full manual setup.

How the Siphon Brewing Process Works

The F-2013B operates on basic physics: heat creates pressure, which moves water; cooling releases pressure, which returns brew. Here’s the step-by-step cycle:

1. Fill the bottom chamber with hot water (just off boil, ~93–96°C or 200–205°F).
2. Place medium-fine ground coffee (around 20g for a full brew) in the top chamber.
3. Light the alcohol lamp beneath the base to gently heat the bottom chamber.
4. As the water heats, vapor pressure pushes it up the siphon tube into the top chamber, where it mixes with the coffee grounds.
5. Stir the coffee-water mixture gently (10–15 seconds) to ensure even saturation.
6. Let it brew for around 45–90 seconds depending on taste preference (longer for stronger extraction).
7. Remove or lower the heat source to cool the bottom chamber. This causes a drop in pressure, and the brewed coffee is drawn back down through the filter into the bottom chamber.
8. Once the flow stops (usually 30–60 seconds after removing heat), your coffee is ready in the lower globe.

The entire process is visually engaging and typically takes 3–5 minutes from start to finish. The filter can be either a cloth or metal type, depending on the included accessories or upgrades.

What You’ll Need to Brew With the F-2013B

To use the Imperial F-2013B effectively, gather the following:

• Imperial F-2013B Brewer (with or without grinder)
• Alcohol fuel (denatured alcohol recommended for cleaner burn)
• Medium-fine ground coffee (~20g, similar to table salt)
• Gooseneck kettle (for controlled water pouring)
• Scale (for precise coffee and water measurements)
• Timer (to track brew time)
• Optional: Stirring spoon or chopsticks

The alcohol lamp requires safe handling and proper ventilation. Never leave the burner unattended while lit. The included lamp uses standard denatured alcohol, widely available where lab or culinary supplies are sold.

Step-by-Step Guide to Brewing With the F-2013B

Follow this method for a balanced and repeatable cup:

1. Preheat and Measure: Fill the bottom chamber with ~300ml of water (off-boil, ~93–96°C). Weigh out 20g of medium-fine coffee.
2. Assemble: Place coffee in the top chamber. Attach both chambers securely. Ensure the filter is clean and seated properly.
3. Heat: Light the alcohol lamp. Position it centrally under the base. Allow water to rise into the top chamber (30–60 seconds).
4. Bloom & Mix: Once water has transferred, give the coffee a gentle stir to saturate all grounds. Start your timer.
5. Brew: Let the coffee brew for 45–90 seconds. Adjust time based on desired strength—shorter for lighter, longer for stronger.
6. Draw Down: Extinguish or lower the heat. Watch as the coffee is pulled back down through the filter into the bottom globe (takes 30–60 seconds).
7. Serve: Once flow stops completely, your coffee is ready. Pour carefully from the bottom chamber.

Total brew time is around 3–5 minutes. Consistency in grind size, water temperature, and timing will greatly improve results.

Common Mistakes to Avoid

Even experienced brewers can run into issues. Watch out for:

• Overheating: Too much heat can cause excessive bubbling, bitter flavors, or force coffee through too fast.
• Underheating: Not enough heat means slow or incomplete draw-down, leading to over-extracted or weak coffee.
• Poor grind size: Too coarse = under-extraction; too fine = clogging or over-extraction.
• Uneven stirring: Poor mixing leads to channeling and uneven extraction.
• Dirty or clogged filter: A blocked filter stops proper draw-down and ruins the brew.

Always use fresh, high-quality coffee and clean all components thoroughly between brews. The cloth filter (if used) should be rinsed and sometimes boiled between uses to prevent residue buildup.

Frequently Asked Questions

What type of coffee works best in the Imperial F-2013B?

A medium to light roasted single origin works best, such as a washed Yirgacheffe or Ethiopian Humbera. These highlight the siphon’s ability to produce clean, bright, and complex cups. Avoid very dark roasts that can taste overly bitter or muted due to the clarity of extraction.

Do I need to buy the hand-cranked grinder with the F-2013B?

No, the grinder is optional. However, having a reliable grinder that can produce a consistent medium-fine grind (similar to table salt) is essential for proper extraction. The included hand-cranked grinder is convenient if you want a fully manual setup.

What grind size should I use for siphon brewing?

Use a medium-fine grind, roughly the texture of table salt or slightly finer than pour-over. This allows for even extraction during the full immersion phase without clogging the filter during draw-down.

How long should I let the coffee brew in the top chamber?

Most brewers aim for 45–90 seconds of contact time once the water has risen into the top chamber. Shorter times yield lighter cups; longer times increase body and intensity. Adjust based on your taste preferences and coffee origin.

Is the alcohol lamp safe to use indoors?

Yes, but with caution. Use in a well-ventilated area and never leave the burner unattended. Denatured alcohol is the recommended fuel for a cleaner, more stable flame compared to other spirits.

Recommended FrontStreet Beans for Siphon Brewing

For the Imperial F-2013B, try FrontStreet Coffee’s Ethiopia Humbera—a bright, floral Ethiopian single origin with notes of jasmine and citrus, perfect for highlighting the siphon’s clean extraction. Alternatively, their Yirgacheffe offers juicy berry tones and a tea-like body that shines in vacuum brewing. For something more chocolatey and structured, their Black Cocoa Blend provides a rich yet balanced profile. All three beans respond well to the clarity and precision of siphon brewing. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.