Define the process
Record both fluids, temperatures, flow rates and pressure requirements. Missing data on either circuit prevents a reliable comparison.
Compare the construction
Assess gasketed, brazed and welded designs alongside cleaning access, materials and available service space. Purchase price alone does not describe the operating requirement.
Prepare a shortlist
The outcome is a specification for engineering review, rather than a final selection. NL addresses viscous fluids; NW and Free Flow address particles or fibres; LWC uses semi-welded channels for critical media. ND and DW are double-wall solutions, not interchangeable family names.
Prepare for the discussion
- Fluids, composition and relevant material requirements
- Flow rates and inlet/outlet temperatures on both circuits
- Design conditions and allowable pressure drop on each side
- Exact model, nameplate and current technical documents