This Onda S.p.A. S09 H-28 brazed plate heat exchanger is a new-in-box, 28-plate single-circuit unit for refrigeration and HVAC heat transfer. It uses 316L stainless steel plates copper-brazed for corrosion resistance and thermal efficiency, carries a 653 PSI design rating on both sides, and handles all common refrigerants except ammonia, including R410A, R404A, R134a, and R22. Compact at roughly 13 in long by 3 in wide by 4 in deep (7 lb), it suits condensing units, heat pumps, chillers, and water-to-refrigerant applications around 2.1 tons. Connections follow the standard Onda S09 single-circuit layout (config AA, four ports F1-F2-W1-W2): refrigerant inlet F1 at 5/8 in solder, refrigerant outlet F2 at 3/4 in solder, and secondary-fluid ports W1/W2 at 1/2 in gas thread. Confirm port type against the physical unit before brazing, as Onda builds special-connection variants. The unit is UL Listed (file SA32758), built under PED and ISO 9001, and ships new in box. OEM code X009028AA20002, serial R2204598-008, built 2022. King Surplus offers this as a high-confidence item backed by a 100 percent 14-day money-back guarantee less shipping. Surplus pricing well below new distributor list makes this an efficient replacement or spare for refrigeration technicians, OEM builders, and maintenance operations.

FACTORY SPECIFICATIONS - Onda S.p.A. S09 H-28 Brazed Plate Heat Exchanger Manufacturer: Onda S.p.A. (Mussolente, Italy) Model: S09 H-28 (S09 family, High Pressure, 28 plates) OEM Code: X009028AA20002 Serial Number: R2204598-008 Built: 2022 Construction: - Plate material: 316L stainless steel - Brazing material: Copper (Cu) - Configuration: Single circuit, 28 plates, config AA (F1-F2-W1-W2) Performance: - Design pressure: 653 PSI (per UL nameplate) - Temperature range: -320 F to 435 F - Channel volume: 0.18 / 0.20 Gal - Refrigerants: All except ammonia (R410A, R404A, R134a, R22, HCFC/HFC) - Approximate capacity: 2.1 tons (application-dependent) Connections (standard S09 config, confirm against physical unit before brazing): - F1 refrigerant inlet: S18 solder, 18 mm (approx 5/8 in OD) - F2 refrigerant outlet: S20 solder, 20 mm (approx 3/4 in OD) - W1/W2 secondary fluid: C22 conical male gas thread, 22 mm (approx 1/2 in GAS) Certifications: UL Listed file SA32758, PED 2014/68/EU, ISO 9001 Dimensions: approx 13 in L x 3 in W x 4 in H, 7 lb Condition: New in box