Sellafield – Evaporator D Project

Heap & Partners were a key valve supplier on the EVAP D project for Sellafield via Costain, supplying all of the actuated valve packages. We also provided design and technical support covering:


Seismic Assessment

There was an initial requirement for all valves to be seismically assessed; working with consultants we formulated proposals for assessment by calculation of manual valves, to be followed up by shaker test of the complete assembly.

Design Study

Due to the evaporator’s modular design it was critical that all valves fitted within the allocated installation space. We carried out a design study (prior to project order placement)  to review various valve/actuator combinations to ensure that dimensions of assemblies would fit.

Actuator Selection

Correct actuator selection is critical to valve operation; working with valve manufacturers we were given access to manufacturing torque data to which we then applied the stringent project-specific actuator sizing criteria. Literally thousands of calculations were carried out on various types of actuators to ensure that those finally supplied would be correct for their intended application.

Additional information


Enquire about Sellafield – Evaporator D Project