Product details Product Description The DSZH-520 Refrigerant Recovery Unit is a high-performance HVAC tool designed for efficient recovery of refrigerants across a wide range of air conditioning and refrigeration systems. Built with an oil-free compressor and double cylinder design, it ensures fast, reliable, and contamination-free recovery operations. This unit features one-key operation, making it simple and user-friendly for technicians, while the self-purge (self-clearing) function helps remove residual refrigerant, improving efficiency and reducing cross-contamination. Equipped with high-pressure protection and an embedded pressure gauge, the DSZH-520 ensures safe and controlled operation in demanding environments. Its robust construction and strong recovery rates make it ideal for both field service and workshop applications. Key Features Oil-free compressor for clean and maintenance-friendly operation Double cylinder system for faster recovery performance One-key operation for ease of use Built-in self-purge (self-clearing) function High-pressure protection system for safety Embedded pressure gauge for real-time monitoring Efficient air-cooled system with fast heat dissipation Suitable for a wide range of refrigerants (R22, R134a, R410A, R404A, etc.) Durable and heavy-duty construction for professional use Technical Specifications Specification Details Model DSZH-520 Type Refrigerant Recovery Unit Compressor Oil-less, Air-Cooled, Single Piston Motor 3/4 HP AC Revolving Speed 1450 RPM Voltage 110V / 220V – 50/60 Hz Maximum Current 8A (110V) / 4A (220V) Pressure Protection 38 bar / 3800 kPa / 551 psi Operating Temperature 0°C to 50°C Dimensions 500 × 225 × 360 mm Weight 18 kg Refrigerant Compatibility Category III: R12, R134a, R401C, R500 Category IV: R22, R401A/B, R402B, R407C/D, R408A, R409A, R411A/B, R412A, R502, R509 Category V: R402A, R404A, R407A/B, R410A, R507 Recovery Performance Mode Category III Category IV Category V Vapor 0.228 kg/min 0.271 kg/min 0.319 kg/min Liquid 3.54 kg/min 4.02 kg/min 5.42 kg/min Push-Pull 11.64 kg/min 14.3 kg/min 14.38 kg/min Applications Refrigerant recovery from HVAC systems Air conditioning servicing and maintenance Refrigeration system repair and gas recovery Workshop and on-site service operations Suitable for commercial and residential HVAC systems Frequently Asked Questions (FAQs) Q1: What is the main use of DSZH-520?It is used to recover refrigerants from HVAC and refrigeration systems safely and efficiently. Q2: Does this unit support multiple refrigerants?Yes, it supports a wide range including R22, R134a, R410A, R404A, and more. Q3: What type of compressor does it use?It uses an oil-free, air-cooled single piston compressor. Q4: What is the benefit of the self-purge function?It clears residual refrigerant from the unit, preventing contamination and improving efficiency. Q5: Is it suitable for heavy-duty use?Yes, with its double cylinder design and strong recovery rates, it is ideal for professional HV View More View Less