DSZH Spare Parts & HVAC Tools: Complete Buyer's Guide

Who Is DSZH and What Do They Make?

DSZH focuses exclusively on HVAC service tooling and chemical consumables used by refrigeration engineers, air-conditioning technicians, and plant maintenance teams. Their catalog spans everything a field technician needs on a service call: refrigerants, compressor lubricants, leak-detection products, nitrogen-based pressure-testing kits, tube-forming tools, and system-cleaning solvents. With 327 product lines available through 3G Electric, DSZH represents one of the most complete single-brand HVAC consumables ranges in the distributor's portfolio.

DSZH Product Categories at a Glance

The table below maps the main product families, representative SKUs, and key specifications drawn from the 3G Electric catalog. Use it as a quick-reference when building a purchase order or maintenance kit.

How to Identify the Right DSZH Part Number

Ordering the wrong consumable or tool can delay a service job and risk equipment damage. Follow this procedure to confirm the correct SKU before placing an order:

1. Check the equipment service manual. Identify the refrigerant type, required oil viscosity grade, and any tube diameter specifications listed by the OEM.
2. Match the viscosity or chemical specification. For compressor oils, compare the required CST rating against the DSZH range — 46 CST (COR05052 / 03007020) or 68 CST (COR05054 / 03007030). Do not substitute grades without OEM approval.
3. Confirm the refrigerant designation. For R32 (CH₂F₂), use COR30014. Check the cylinder's stamped marking and the system's data plate to verify compatibility before charging.
4. Verify tube tool sizing. For the gear-driven tube bender (COR35630, TA515M Series), confirm the pipe OD falls within 7/8", 1", or 1 1/8". For the swaging tool (COR35108), confirm the tube diameter is within 3/16 mm – 16 mm and the required flare angle is 37° SAE or 45° SAE.
5. Cross-reference the DSZH part number with the 3G Electric SKU. Both identifiers appear on the product datasheet and the 3G Electric catalog listing. Quote both when requesting a price or lead time.
6. Request a datasheet for chemical products. For solvents, dye cleaners, and disinfectants, confirm the flash point and application compatibility with your system materials before use.

Compressor Oils: Choosing Between 46 CST and 68 CST

DSZH offers two mineral oil grades for refrigeration compressors, both in 1 L containers with a density below 1 kg/dm³ and complete oil solubility. The choice between them depends entirely on the compressor OEM's lubrication specification:

• 46 CST (COR05052 / 03007020): Lower viscosity; typically specified for smaller or higher-speed compressors where reduced drag is prioritised.
• 68 CST (COR05054 / 03007030, commercial name HS 32): Higher viscosity; typically specified for larger or lower-speed compressors requiring greater film strength.

Both grades are noted as insoluble in water. Always cross-check the compressor nameplate or service manual before selecting a grade — mixing viscosity grades is not recommended.

Leak Detection and System Integrity Products

DSZH's leak-detection range covers both chemical and UV-dye methods:

• Better Bubble Leak Detector Spray (COR55016): A 950 ml bright-blue, water-soluble spray with 0% VOC content and a shelf life of 2 years. Flash point is 368 °F. Apply to joints and fittings; bubbles indicate a leak path.
• Universal UV Tracer / TRACCIANTE (COR55025 / 31004040): Yellow-coloured dye injected into the refrigerant circuit; leaks fluoresce under UV light. Use the dye cleaner (COR40934 / PULITORE ADDITIVO UV) to remove residual dye before recharging with a different dye type.
• Nitrogen Pressurisation Kit (COR10006): Includes a 1 kg nitrogen bottle, pressure reducer with a 50 bar safety setting, a 2500 mm long tube, and a 900 mm short tube in a polypropylene casing. Used for pressure-testing circuits before refrigerant charging.

System Cleaning and Flushing Products

Contaminated refrigerant circuits require thorough flushing before recharging. DSZH provides a tiered cleaning range:

• Washing Solvent 1 L (COR10019 / 31006970): Colourless, non-flammable solvent (flash point >+55 °C, boiling point +160 °C, density 0.81 kg/l) for AC system interior cleaning. Water-insoluble.
• Cleaning Solvent 5 L (COR10021 / 31006975): Same chemical profile as the 1 L variant but in a larger 5 L container — suited to larger systems or workshop batch cleaning.
• Nitrogen Detergent Spray (COR10065 / 31006053): Liquid nitrogen solvent spray with a dispense range of 8–10 m, relative density 0.75–0.85 kg/l, for internal AC system washing.
• Nitrogen Cleaning Kit (COR10060 / 31006065): A 0.5 L aluminium container with a special tube and spray gun handle; operating pressure 5–7 bar.
• Disinfectant Spray (COR10038 / 31006010): 400 cc transparent yellow liquid (pH ~7, ethanol and isopropanol composition) for surface and coil disinfection.

How to Source DSZH Products Through 3G Electric

1. Identify the required product using the DSZH part number or 3G Electric SKU from the table above.
2. Submit a request for quotation (RFQ) to 3G Electric, quoting both the SKU and the DSZH part number to avoid ambiguity.
3. Confirm lead time at quotation stage — availability is subject to supplier scheduling and is not guaranteed until a purchase order is acknowledged.
4. For chemical products (refrigerants, solvents, oils), request the Safety Data Sheet (SDS) at the quotation stage to ensure compliance with your site's handling and storage requirements.
5. For international orders, 3G Electric manages customs documentation and worldwide logistics; confirm incoterms and destination requirements when placing the order.

Frequently Asked Questions

What types of products does DSZH make?

DSZH specialises in HVAC tools and consumables. Their range includes refrigerant bottles, mineral compressor oils, leak detection sprays, UV tracers, tube benders, tube swaging tools, nitrogen kits, and system-cleaning solvents — 327 product lines in total.

What is the difference between DSZH 46 CST and 68 CST mineral oil?

Both are mineral oils for refrigeration compressors in 1 L containers with density below 1 kg/dm³. The 46 CST grade (COR05052) has lower viscosity; the 68 CST grade (COR05054, commercial name HS 32) has higher viscosity. Always follow the compressor OEM's lubrication specification.

Is DSZH R32 refrigerant (COR30014) compatible with all systems?

R32 (CH₂F₂, molecular weight 52 g/mole, boiling point -51.7 °C) is only compatible with systems specifically designed or rated for R32. Check the system's data plate and OEM documentation before charging — do not use in systems rated for other refrigerant types.

What is the shelf life of the Better Bubble leak detector spray?

The DSZH Better Bubble Leak Detector Spray (COR55016, 950 ml) has a stated shelf life of 2 years. Store in a cool, dry location away from direct sunlight and check the batch date on the container before use.

What tube sizes does the DSZH gear tube bender (COR35630) support?

The TA515M Series gear-driven tube bender (COR35630) supports three tube sizes: 7/8", 1", and 1 1/8". Maximum bending angle is 180°. Confirm the pipe OD against these sizes before ordering.

How do I clean UV dye from an AC system before recharging?

Use the DSZH Dye Cleaner PULITORE ADDITIVO UV (COR40934 / 29028004), which is specifically formulated for removing UV additive dye from air-conditioning systems. Follow the product's SDS instructions for dosage and flushing procedure.

What is the maximum operating pressure of the DSZH nitrogen cleaning kit?

The DSZH Nitrogen Cleaning Kit (COR10060 / 31006065) operates at a maximum pressure of 5–7 bar. The kit uses a 0.5 L aluminium container and includes a special tube and spray gun handle for internal AC system flushing.

How do I place an order for DSZH products through 3G Electric?

Submit an RFQ quoting the 3G Electric SKU and DSZH part number. Lead times are confirmed at quotation. For chemical products, request the Safety Data Sheet at the same time. 3G Electric handles international logistics and customs documentation for worldwide delivery.