4132 Safety Valve for all 2" Boilers & 3" Vertical Boiler Bore/stroke 8 x 11 mm

Bore/stroke                        8 x 11 mm twin cylinder double acting oscillating engine

This boiler performs the exactly the same as the 2" "Econo" boiler (P/N 4056) except it requires a little more space and holds more water for longer running time

3” Horizontal Copper Boiler P/N 4059

Running time/fill @ 25 psi - 20 min approx

Basic unit for the "Beginners" steam plant special with a reversing engine

4132 Safety Valve for all 2" Boilers & 3" Vertical Boiler Bore/stroke 8 x 11 mm1 4 x 40 TPI suitable for all Miniature Steam 2" Boilers & 3" Vertical Boiler. 0 60 PSI Note: these have simple adjustable spring loaded relief balls surfaces that progressively release pressure when the setting is passed. They are not "pop"valves that trigger at a set pressure.