{"product_id":"rw-b2-vertical-premium-live-steam-boiler-500ml","title":"RW-B2 Vertical Premium Live Steam Boiler (500mL)","description":"# RW-B2 Vertical Live Steam Boiler (500mL)\n## Heavy-Duty Copper Power Plant with Hardwood Insulation | Engine-Ready Marine Boiler for 70–150cm Scale Boats\n\n### **Built for the Open Water: Premium Live Steam Performance**\nNothing rivals the timeless charm of a live steam ship slicing through open water on a clear summer day. Designed specifically for scale marine builders and model shipwrights, the **RW-B2 Vertical Boiler** delivers the exact pressure, thermal efficiency, and vintage aesthetic your marine engine demands. Whether you're upgrading a working RC steamboat or building a museum-worthy display piece, the RW-B2 serves as the ultimate high-output heart for your vessel.\n\n---\n\n### **Why Live Steam Enthusiasts Choose the RW-B2**\n\n* **Silver-Brazed Solid Copper Core:** Hand-assembled from heavy-gauge copper and joined via high-temperature copper-silver brazing. Built to comfortably handle continuous thermal cycles and working pressures up to 4 kg\/cm² (57 PSI) without seam breakdown.\n* **Authentic Hardwood Thermal Jacket:** Wrapped in an insulated, hand-finished hardwood casing that isn't just for show—it drastically minimizes radiant heat loss, boosts boiler efficiency, and keeps fuel consumption low.\n* **High-Efficiency Curved Burner Tube:** Features a seamless, integrated curved burner designed for butane gas. The unique geometry maximizes flame contact across the 500mL water chamber, achieving faster warm-up times and stable steam production.\n* **Superheated Steam for Peak Efficiency:** Includes an internal superheater line that dries out wet steam before it reaches your engine's cylinders, preventing water lock and delivering smooth, crisp piston strokes.\n* **Fail-Safe Monitoring \u0026amp; Control:** Complete peace of mind on the water. Outfitted with **dual pop-off safety valves** (preset to 4.5–5 kg\/cm²), a heavy-duty **0–6 Bar pressure gauge**, and a clear sight-glass water level indicator.\n\n---\n\n### **Direct-Fit Compatibility with Stirlingkit Engines**\nEngineered with standard **M7 × 0.75** steam line threading, the RW-B2 drops seamlessly into your RC hull layout and pairs directly with our premier marine engines:\n\n* [**RW-V4 Marine Engine**](https:\/\/www.stirlingkit.com\/products\/rw-v4-miniature-4-cylinder-steam-engine-v4-engine-model-for-90-150cm-boat-models) — *Miniature 4-Cylinder Steam Engine (Ideal for 90–150cm hulls)*\n* [**RW-V2 Marine Engine**](https:\/\/www.stirlingkit.com\/products\/rw-v2-mini-dual-cylinder-v2-reciprocating-steam-engine-precision-model-for-70-130cm-boats) — *Mini Dual-Cylinder V-Type Steam Engine (Ideal for 70–130cm hulls)*\n* [**RW-L2 Marine Engine**](https:\/\/www.stirlingkit.com\/products\/rw-l2-retro-precision-mini-reciprocating-inline-twin-cylinder-steam-engine-model) — *Inline Twin-Cylinder Steam Engine (Ideal for 70–130cm retro hulls)*\n\n---\n\n### **Technical Specifications**\n\n| Feature | Specification |\n| :--- | :--- |\n| **Model** | RW-B2 Vertical Steam Boiler |\n| **Boiler Shell** | Heavy-Gauge Copper (Silver-Brazed) |\n| **Exterior Insulation** | Hand-Finished Hardwood Jacket |\n| **Water Capacity** | 500 mL (~17 oz) |\n| **Fuel System** | Butane Gas (Curved Burner Tube) |\n| **Operating Pressure** | 2.0 – 4.0 kg\/cm² (28.4 – 56.8 PSI) |\n| **Safety Relief Setting** | 4.5 – 5.0 kg\/cm² (64 – 71 PSI) |\n| **Thread Interface** | M7 × 0.75 mm |\n| **Boiler Dimensions** | 90mm Dia. × 140mm H (120mm Chimney) |\n| **Overall Dimensions** | 12 × 9 × 14 cm |\n| **Net Weight** | 1.5 kg (3.3 lbs) |\n| **Recommended Hull Length** | 70 – 150 cm (27.5\" – 59\") |\n| **Target Age Group** | 16+ |\n\n**What’s in the Box:**\n* 1× RW-B2 Vertical Live Steam Boiler Assembly\n* 1× Integrated Curved Burner System \u0026amp; Pressure Gauge\n* 1× User Manual \u0026amp; Safety Operation Guide\n\n---\n\n### **Frequently Asked Questions (FAQ)**\n\n**Q1: Is this boiler handmade, and do you currently have stock available?**  \n**A:** Yes! Each RW-B2 boiler is meticulously **hand-assembled and precision-brazed by experienced master craftsmen**. Due to the intricate artisan manufacturing process, production is strictly limited. We currently have an **exclusive batch of just 20 units in stock and ready for immediate dispatch**. Once sold out, the next production run may take several weeks.\n\n**Q2: How long does shipping take, and do you ship worldwide?**  \n**A:** We provide **worldwide tracked express shipping** to North America, Europe, Australia, and East Asia. In-stock orders are processed and dispatched within **24–48 hours**. Average delivery times are:\n* **USA \u0026amp; Canada:** 7–12 business days (Express options available)\n* **Europe \u0026amp; UK:** 7–10 business days\n* **Australia \u0026amp; Rest of World:** 8–14 business days\n\nYou will receive a tracking code via email as soon as your package leaves our facility.\n\n**Q3: How is the boiler packaged to ensure it arrives safely without damage?**  \n**A:** Precision steam equipment requires maximum transit protection. Every RW-B2 is secured inside a high-density, custom-molded shockproof foam casing within a reinforced graphic carton. Sensitive components like the pressure gauge and glass sight tube are doubly protected against vibration, drops, and rough handling during international transit.\n\n**Q4: What type of fuel should I use, and how long does a full tank run?**  \n**A:** The RW-B2 boiler is designed to run on standard **butane gas** (commonly used for model boilers or portable stoves). With a full 500mL water capacity and a properly adjusted flame, a single session typically yields **20 to 30 minutes of continuous run time**, depending on your engine's steam consumption and throttle settings.\n\n**Q5: How do I fill water into the boiler, and what kind of water should I use?**  \n**A:** Always use **distilled or demineralized water** to prevent mineral scale build-up inside the copper tubes. Fill the boiler to approximately 70–80% of its total capacity (around 350–400mL), leaving enough headroom for steam to expand. You can monitor the precise level via the built-in sight glass.\n\n\u0026gt; **Pro Tip:** Never dry-fire the boiler without water, as this will damage the silver-brazed seams and thermal insulation.\n\n**Q6: How safe is this boiler to operate? What safety features are built in?**  \n**A:** Safety is our top priority. The RW-B2 operates safely between **2–4 kg\/cm² (28–57 PSI)** and features **dual independent safety pop-off valves** set to automatically vent excess pressure at 4.5–5 kg\/cm². Additionally, the live pressure gauge allows real-time pressure monitoring, and the hardwood jacket protects your hands from direct contact with hot copper.\n\n**Q7: Will this boiler fit inside my specific RC boat hull?**  \n**A:** The RW-B2 has a compact footprint with a 90mm boiler body diameter, a 140mm height, and a 120mm chimney. It is engineered for **70cm to 150cm (27.5\"–59\") model boat hulls** (such as steam launches, tugboats, and riverboats) with sufficient deck height or chimney cutout clearance.\n\n**Q8: How do I connect this boiler to my steam engine?**  \n**A:** The boiler features a standard **M7 × 0.75 threaded steam outlet**. It connects directly to Stirlingkit steam engines ([RW-V4](https:\/\/www.stirlingkit.com\/products\/rw-v4-miniature-4-cylinder-steam-engine-v4-engine-model-for-90-150cm-boat-models), [RW-V2](https:\/\/www.stirlingkit.com\/products\/rw-v2-mini-dual-cylinder-v2-reciprocating-steam-engine-precision-model-for-70-130cm-boats), and [RW-L2](https:\/\/www.stirlingkit.com\/products\/rw-l2-retro-precision-mini-reciprocating-inline-twin-cylinder-steam-engine-model)) using copper steam piping. If your engine uses a different thread size, standard thread adapters (M7 to M6 or 1\/4\"-40) can be used.\n\n**Q9: What maintenance is required after each steam session?**  \n**A:** After each use and once the boiler has cooled down completely:\n1. Drain all remaining water to prevent internal corrosion or stagnant residue.\n2. Wipe down the hardwood jacket and copper body with a dry soft cloth.\n3. Apply a drop of steam cylinder oil or light machine oil to the safety valve springs to keep them operating smoothly.","brand":"Stirlingkit","offers":[{"title":"Default Title","offer_id":54454086828245,"sku":null,"price":569.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0134\/7446\/3808\/files\/stirlingkit-rw-b2-vertical-premium-live-steam-boiler-500ml_2.jpg?v=1786103829","url":"https:\/\/www.stirlingkit.com\/ko\/products\/rw-b2-vertical-premium-live-steam-boiler-500ml","provider":"Stirlingkit","version":"1.0","type":"link"}