We supply high-efficiency heat exchangers manufactured by Italian producer Wieland Onda S.r.l. for industrial refrigeration, chillers, heat pumps, HVAC systems, and process cooling loops. Engineering thermal sizing, direct supply of complete equipment and genuine factory replacement parts.
ONDA Product Categories
Select your required category of brazed or gasketed plate heat exchangers, shell & tube units, liquid receivers, or dry coolers. You can attach a nameplate photo or engineering drawing to your inquiry.
Onda S-Series Brazed Plate Heat Exchangers (BPHE)
Onda S-series brazed plate heat exchangers are built from corrugated AISI 316L stainless steel plates vacuum-brazed with pure copper or nickel filler.
The compact construction provides mechanical strength, pressure pulsation resistance, and high heat transfer coefficients with minimal refrigerant volume. Optimized for HFC (R410A, R134a, R407C), low-GWP HFO (R1234ze, R32), R290, and transcritical CO2 (R744).
Available in single/dual circuit models, evaporators with patented distributors, and compact BPHE Oil Coolers. Design pressures reach 45 bar (up to 140 bar for CO2), across temperatures from -196°C to +200°C.
Selection inputs: model size (S04–S800), plate count, braze material (copper/nickel), circuit count, and ODS/Victaulic port size.
Onda F-Series Gasketed Plate & Frame Heat Exchangers (PHE)
Onda F-series gasketed plate & frame heat exchangers consist of corrugated plates with elastomer gaskets clamped between frame plates using tie bolts. The design facilitates mechanical cleaning, CIP flushing, and future thermal expansion by inserting additional plates.
The lineup includes sizes F005, F008, F014, F020, F026, F030, F050, F065, F080, F100, F150, F200, F250, and F300 with ports from DN25 up to DN300. Plates are pressed in AISI 304, AISI 316L, titanium Gr.1, 254 SMO, and Hastelloy.
Gaskets feature glue-free Clip-on or glued attachment in NBR (+110°C), EPDM (+150°C), and FKM Viton (+180°C). Frames meet PN6, PN10, PN16, and PN25 ratings.
Onda Shell & Tube Direct Expansion and Flooded Evaporators
Onda shell & tube evaporators are engineered for chilling water, brines, and glycol in industrial central chillers. The portfolio includes dry expansion (DX) evaporators series FSE, LSE, SSE, LPE, MPE, HPE, HDE, alongside flooded evaporators FLS, FLT, and Hybrid Film designs.
Capacities span 10 kW to 3000 kW with 1 to 4 independent refrigerant circuits. Tube bundles utilize seamless Cu-DHP copper tubes with internal Turbo-Chil micro-fins, CuNi 90/10 copper-nickel, or titanium.
Shells fabricated from boiler-grade P265GH/P275NL steel feature removable cast water heads and optimized baffles.
Selection inputs: cooling capacity (kW), series (MPE/LSE/SSE/FLS), circuit count (1–4), refrigerant type, and chilled fluid flow rate.
Onda Shell & Tube Freshwater and Marine Condensers
Onda shell & tube condensers series C, L, B, CRW, LVC and marine units M, SM, CSD reject heat to tower, well, or seawater. Heat capacities range from 15 kW to 4500 kW.
Condensation occurs across externally finned Trufin copper tubes, with the bottom shell serving as an integrated liquid receiver.
For seawater, Marine Condensers incorporate CuNi 90/10 or titanium tubes, CuNi-clad tube sheets, bronze/iron heads with Rilsan coating, and zinc anodes. Shell pressure reaches 30–45 bar, water pressure up to 10–16 bar.
Selection inputs: heat rejection (kW), series (C/L/CRW/M/SM), water quality (fresh/sea), cooling water flow, and refrigerant designation.
Onda OIL Series Oil Coolers and OVS Coalescent Oil Separators
Onda oil management systems are engineered for screw, reciprocating, and centrifugal compressors from Bitzer, Frascold, Dorin, Hanbell, and Howden. OIL shell & tube coolers and compact BPHE Oil Coolers cool lubrication oil using water or thermosyphon boiling liquid with low pressure drop.
Three-stage OVS New Generation 2 oil separators remove submicron oil aerosol from discharge gas with efficiency up to 99.95% via cyclone, gravity, and coalescing microglass elements. Units integrate mechanical float valves for oil return, sight glasses, and heater wells.
Selection inputs: oil cooling capacity (kW), series (OIL/BPHE/OVS), oil mass flow rate, compressor model, and oil viscosity grade.
Onda RL and RL-V Series Liquid Refrigerant Receivers
Onda liquid refrigerant receivers series RL (horizontal) and RL-V (vertical) store liquid refrigerant charge downstream of condensers and buffer level fluctuations.
Pressure vessels are fabricated from certified boiler plate steel using submerged arc welding with 100% weld inspection and hydrostatic testing. Capacities span 5 to 5000 liters with design pressures of 30, 33, 42, and 45 bar for standard refrigerants and up to 140 bar for CO2.
Equipped with Rotalock service valves, dual relief valve manifold ports, prismatic level sight glasses, and mounting brackets.
Onda air-cooled heat exchangers comprise industrial dry coolers and remote condensers engineered for outdoor rooftop installation.
The heat transfer core consists of seamless copper or stainless tubes mechanically expanded into high-density corrugated aluminum fins with corrosion protection (hydrophilic, epoxy, Blygold). Available in horizontal, vertical, and V-bank configurations with heat rejection from 20 kW to 2000 kW.
Equipped with low-noise axial fans (EC or AC, 500 to 900 mm), integrated control panels, variable speed drives, and optional adiabatic spray pads.
Selection inputs: heat rejection (kW), configuration (flat horizontal / V-bank), fan motor technology (EC/AC), and ambient design temperature.
Onda Spare Gaskets, Plates, and Tube Bundles
We supply genuine factory replacement parts and overhaul kits for Onda heat exchangers. The portfolio includes replacement NBR, EPDM, and FKM Viton gaskets with glue-free Clip-on or glued profiles for F-series units (F005 to F300).
Replacement corrugated plates are pressed in AISI 304, AISI 316L, titanium, and 254 SMO (0.5 to 0.7 mm) with high-theta (H) and low-theta (L) patterns.
For shell and tube units, we provide replacement tube bundles with tube sheets, epoxy-coated water heads, head gaskets, sight glasses, and zinc anodes.
Selection inputs: unit model designation from nameplate, plate/gasket material, plate count, and manufacturer serial number.
Engineering Inputs for Heat Exchanger Sizing
Thermal duty (kW), heat transfer application (evaporation, condensation, liquid-liquid, oil cooling), fluid flow rates (m³/h or kg/s), inlet and outlet temperatures (°C), allowable pressure drop (kPa), refrigerant designation (R410A, R32, R134a, R290, R744 CO2, NH3), design operating pressure (bar), and material construction (copper, stainless steel AISI 316L, titanium, CuNi 90/10).
Genuine Spare Parts and Replacement Components
We supply genuine NBR, EPDM, and FKM Viton gasket sets for F-series gasketed heat exchangers, replacement AISI 316L and titanium plates, replacement tube bundles and water heads for shell and tube evaporators and condensers, sacrificial zinc anodes, flange gasket kits, and connection couplings.
Design Features and Fluid Distribution in S-Series Brazed Plate Heat Exchangers
Onda S-series brazed plate heat exchangers incorporate advanced corrugated chevron plate patterns and patented refrigerant distribution systems built into the evaporator inlet connection ports.
The internal micro-channel distribution structure ensures uniform two-phase refrigerant feeding across all parallel plate channels, preventing localized dry-out and avoiding stagnant zones.
9% pure copper or nickel filler, the compact assembly withstands cyclic design pressures up to 45–140 bar and operating temperatures from -196 °C to +200 °C without thermal fatigue failure.
Advantages of the Clip-on Gasket Retention Mechanism in F-Series Plate Heat Exchangers
Onda F-series gasketed plate heat exchangers feature a glue-free Clip-on gasket retention mechanism that securely fastens elastomeric gaskets into the plate groove using mechanical locking clips.
During preventive maintenance or plate pack chemical cleaning, Clip-on gaskets are quickly removed and reinstalled without tearing the sealing profile, significantly reducing downtime and preventing chemical degradation of adhesive compounds.
Gaskets are available in high-temperature EPDM (up to +150 °C), oil-resistant NBR (up to +110 °C), and fluoroelastomer FKM Viton (up to +180 °C).
Marine Grade Construction of M and SM Series Shell & Tube Condensers
For marine refrigeration plants and coastal chiller installations operating with seawater, Onda manufactures M, SM, and CSD series shell and tube condensers.
Construction features seamless copper-nickel CuNi 90/10 or titanium tubes with external finning, CuNi-clad tube sheets, and heavy-duty cast bronze or iron water heads lined with protective Rilsan coating.
To prevent galvanic corrosion in seawater service, water heads are fitted with replaceable sacrificial zinc anodes, ensuring long service life.
Three-Stage Oil Separation Efficiency in OVS Refrigerant Separators
95%. Separation occurs in three sequential stages: centrifugal vortex swirl to knock down large oil droplets, gravity settling in the expansion chamber, and final polishing through replaceable microglass coalescing filter cartridges.
Separated oil accumulates in the bottom sump and returns automatically to the compressor crankcase via a precision float valve mechanism.
Submit Thermal Specification for Engineering Sizing
Attach your technical specification, duty data sheet, or nameplate photos of existing equipment. Our engineering team will prepare an official commercial proposal with thermal calculations, CAD drawings, and delivery schedules for Onda equipment.
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