Serviceable cassette plate heat exchangers engineered for ammonia refrigeration and duties that require a welded refrigerant circuit with an openable secondary side.
Adjacent corrugated plates are perimeter-welded into cassettes. Ammonia or another critical medium flows through the welded channels, while the secondary fluid travels through gasketed channels between cassettes. Ring gaskets seal the cassette ports and field gaskets seal the openable service side.
Construction
Perimeter-welded plate cassettes in an openable frame
Temperature range
-45°C to 150°C
Maximum pressure
16 bar gasket side / 25 bar welded side
Plate thickness
0.6 / 0.7 mm
Gasket system
Clip-on field gasket with CR or EPDM ring gaskets
Flow arrangement
Parallel
Engineering explained
See what is happening inside the exchanger.
Product imagery is paired with technical context so buyers and engineers can understand construction, flow path and configuration—not just the exterior.
01
Welded refrigerant channel, openable service channel
Each cassette is sealed by a continuous peripheral weld. The refrigerant remains inside the welded channel, while the secondary fluid flows through the gasketed channel between cassettes.
02
Separate ring and field gasket functions
Ring gaskets seal the welded-cassette ports. The field gasket seals and directs the service-side flow, allowing the plate pack to remain openable for inspection and cleaning.
Models & technical data
Compare models and published specifications.
Compare circuit arrangement and overall dimensions at a glance, then open a product size for its product view, dimension drawing and technical summary.
Published HEXNOVAS semi-welded plate heat exchanger platform data. The refrigerant-side channels are perimeter-welded while the service side remains gasketed and openable. Final cassette count, connection arrangement and refrigeration capacity are confirmed from the thermal duty.
Dimensions are for reference only. Final dimensions are subject to the approved order drawing. HEXNOVAS reserves the right of final interpretation.
Model details
BH60HW
HEXNOVAS Semi-Welded Plate Heat Exchangers
Product configurationDimension drawing
Width (mm)
320 mm
Height (mm)
920 mm
Max. pressure (bar)
Gasket side 16 / welded side 25
Max. flow (m³/h)
54
Free channel (mm)
3
Plate area (m²)
0.15
Port size
DN50
Refrigeration duty
10-70 RT / 35-250 kW
Plate thickness
0.6 / 0.7 mm
Plate material
SS304 / SS316L / titanium
Field gasket
NBR / EPDM / FKM
Ring gasket
CR / EPDM
Gasket type
Clip-on
Flow arrangement
Parallel
Temperature range
-45°C to 150°C
Dimensions are for reference only. Final dimensions are subject to the approved order drawing. HEXNOVAS reserves the right of final interpretation.
Openable service side supports inspection, cleaning and maintenance
Efficient turbulent flow reduces refrigerant charge and footprint
Gasket-side pressure up to 16 bar and welded-side pressure up to 25 bar
Product configuration
Structure and material options.
Available configurations
BH60HW, BH100BW, BH150BW and BH200HW platforms
Evaporator, condenser and heat-pump duty
Single- and multi-pass arrangements
Project-specific connections and cassette counts
Material options
SS304, SS316L or titanium heat-transfer plates
NBR, EPDM or FKM field gaskets
CR or EPDM ring gaskets
Typical applications
Where this exchanger fits.
01
Ammonia evaporators and condensers
02
Industrial refrigeration and cold storage
03
Food and beverage process cooling
04
Ammonia heat pumps and heat recovery
Selection information
What our engineers need from you.
Provide refrigerant, evaporation or condensing duty, secondary fluid, capacity, flow rates, inlet and outlet conditions, design pressures, allowable pressure drop, connection sizes and applicable refrigeration standard.
Frequently asked questions
Key questions before product selection.
How does Semi-Welded Plate Heat Exchangers work?
Adjacent corrugated plates are perimeter-welded into cassettes. Ammonia or another critical medium flows through the welded channels, while the secondary fluid travels through gasketed channels between cassettes. Ring gaskets seal the cassette ports and field gaskets seal the openable service side.
What information is required to select the right product?
Provide refrigerant, evaporation or condensing duty, secondary fluid, capacity, flow rates, inlet and outlet conditions, design pressures, allowable pressure drop, connection sizes and applicable refrigeration standard.
Which materials and configurations are available?
SS304, SS316L or titanium heat-transfer plates; NBR, EPDM or FKM field gaskets; CR or EPDM ring gaskets
How is the final product size confirmed?
The final size is confirmed by thermal calculation using flow rates, inlet and outlet temperatures, allowable pressure drop, design pressure and fluid properties.
Product documentation
Catalogue and technical downloads.
Use the published catalogue for product-range reference. Final dimensions, ratings and materials are confirmed for the selected model and operating duty.
