How to Read a PHE Nameplate: Spare Parts Guide
How to Read a Plate Heat Exchanger Nameplate (Spare Parts Guide)
A spare parts order often stalls on one small thing: a frame tag painted over, half legible, or never photographed. Knowing how to read a plate heat exchanger nameplate settles it in minutes and decides whether a quote comes back today or after three emails.
Fields Printed on a Plate Heat Exchanger Nameplate
Makers lay out the tag differently, but the content is much the same: manufacturer and model code, serial number, year of build, number of plates, surface area, design pressure, design temperature, test pressure, connection size, duty medium, and weight. Some add heat load, flow rate, and the vessel code. Photograph the whole tag first, then take a close shot of the model string. Numbers at the edge of a corroded plate are the ones that get misread.
Model Number and Serial Number
The plate heat exchanger model number identifies the frame size and the plate pattern behind it. Numbering is proprietary: the same characters can mean different things between makers. Copy the string exactly as printed.
The plate heat exchanger serial number ties the unit to the maker's build record. That matters when a model has been renamed or dropped and the drawing must come from the archive.
Plate Count and the Pack on the Floor
The plate heat exchanger plate count on the tag records the pack as it left the factory. Plates get added and removed during service, so count them on site before ordering and note any difference. Then measure the A-measurement, the distance across the pack between the fixed and movable covers. A supplier can check a gasket order against that figure, and it confirms the pack is compressed correctly after reassembly.
When the Tag Cannot Be Read
Corroded, repainted, and missing tags are common on older units. To identify a plate heat exchanger without a nameplate, work from the parts. Photograph the plate edge so the gasket profile and hanging points show, measure plate width, height, and port centre distance, and record connection size and A-measurement. Face and cross-section photos of the old gasket close most of the gap.
What to Send with an Inquiry
Nameplate photo, plate count, A-measurement, quantity, and the duty medium with operating temperature. Put a scale in the photos. Most delays trace back to a tag shot too small to read, or a plate count nobody checked.
FAQ
Q: Where is the nameplate usually fixed?
A: On the fixed cover, near a connection or the carrying bar. Some sit on the movable cover.
Q: Does the tag tell me how many plates to order?
A: It tells you what was built. Order from the count in the unit now, plus spares.
