RW-B2 · Steam boiler unit
Compact Model Steam Boiler
A compact boiler assembly with the hardware in clear view.
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The B2 at a glance
An official Rocking Whale product.
The RW-B2 is a compact model steam boiler with brass fittings, copper pipework and visible pressure hardware for miniature steam-engine installations.
The RW-B2 is a compact steam boiler unit presented with brass fittings, copper pipework and a visible pressure gauge. Its detailed construction makes it a natural companion for small steam-engine installations.
Within a specialist retail range, the B2 provides a modular boiler option for builders selecting the remaining parts of their own steam installation.
- Compact boiler arrangement
- Visible pressure gauge
- Copper pipework and brass fittings
- Detailed workshop-built presentation
Reference data
Technical specifications.
Figures are provided as a selection guide. Specifications are subject to alteration for improvement without notice.
- Product type
- Steam boiler unit
- Construction
- Brass fittings and copper pipework
- Controls
- Pressure gauge and valve hardware
- Documentation
- Current specification available on request
The B2 in detail
A closer look at the mechanism.
Product, detail, installation and running photographs from the Rocking Whale workshop.








Commercial resources
Evaluate the details.
Use the current manuals and specifications to review the model. Product materials and commercial information are available through a direct enquiry.
Trade & volume enquiries
Discuss the B2.
For distributor evaluation, sample requirements or volume quotations, tell us about your company, market and expected quantity. Contact Rocking Whale for current product price and shipping information for your project.
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Frequently asked questions.
What is the B2 designed for?
The B2 is a standalone model steam boiler for builders planning a compact steam-engine installation.
Can I request B2 specifications?
Yes. Contact Rocking Whale for current B2 product documentation and commercial evaluation details.
What is the B2 price?
Contact Rocking Whale for the current product price and shipping information. Include your project, quantity and destination so we can prepare an appropriate quotation.
What does RW-B2 mean?
RW-B2 is the Rocking Whale model designation for this compact model steam boiler.
How is hydrostatic pressure testing performed on the RW-B2 miniature steam boiler?
Hydrostatic pressure testing involves filling the brass boiler completely with ambient water (eliminating air pockets) and applying hydraulic pressure up to 1.5 to 2 times the operating pressure using a hand test pump to verify seam integrity and fittings before live steam generation.
What safety valve pressure setting and water maintenance are recommended for the B2?
The RW-B2 safety valve is calibrated to release at 2.5–3 kg/cm² (approx. 2.5–3 bar). Operators should always use distilled or demineralised water filled to 70–80% boiler capacity to prevent limescale buildup and ensure adequate steam space.