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DSZH

USAHVAC & Refrigeration

DSZH is an HVAC tools and components manufacturer specializing in refrigeration service equipment, hose fittings, and manifold accessories. The product line encompasses SAE and NPT threaded connections, flare fittings, adapter bottles for refrigerant recovery, reducer unions, and field-service tool attachments—components routinely encountered in air-conditioning, heat pump, and refrigerant-handling applications. DSZH designs these items to meet ISO and SAE standards for refrigeration systems, with materials and thread specifications matched to R-series refrigerants including R600A and common HFC/HFO alternatives. The catalog includes hose tips in fractional inch and metric sizes (1/4", 5/16", 5/8", 7/8" diameters), reducing adapters for pressure-line gauges and recovery equipment, flare connector caps, dudgeon extensions, and multi-port bases for manifold assembly. These components are suited for technicians who service split-system air conditioners, packaged rooftop units, process-cooling loops, and industrial refrigeration systems where reliable, leak-free connections are essential

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About DSZH

DSZH is an HVAC tools and components manufacturer specializing in refrigeration service equipment, hose fittings, and manifold accessories. The product line encompasses SAE and NPT threaded connections, flare fittings, adapter bottles for refrigerant recovery, reducer unions, and field-service tool attachments—components routinely encountered in air-conditioning, heat pump, and refrigerant-handling applications. DSZH designs these items to meet ISO and SAE standards for refrigeration systems, with materials and thread specifications matched to R-series refrigerants including R600A and common HFC/HFO alternatives. The catalog includes hose tips in fractional inch and metric sizes (1/4", 5/16", 5/8", 7/8" diameters), reducing adapters for pressure-line gauges and recovery equipment, flare connector caps, dudgeon extensions, and multi-port bases for manifold assembly. These components are suited for technicians who service split-system air conditioners, packaged rooftop units, process-cooling loops, and industrial refrigeration systems where reliable, leak-free connections are essential

Common Applications

  • Split-system air-conditioner service: DSZH manifold bases and SAE/NPT reducers integrate with technician gauge sets for pressure monitoring and refrigerant charge.
  • Rooftop packaged unit maintenance: Flare connector caps, hose tips, and union fittings expedite field replacement of damaged lines and adapters on commercial cooling systems.
  • Refrigerant recovery and recycling: DSZH bottle adapters (R600A-rated) connect recovery cylinders to hose lines, enabling safe extraction of flammable and standard refrigerants.
  • Process-cooling loop installation: SAE straight male/female unions and reducers support temporary or permanent manifold assembly on industrial water-chilled equipment.
  • Heat-pump seasonal service: DSZH dudgeon extensions and adapter kits allow technicians to connect diagnostic gauges to restricted or recessed access ports on reversing-valve manifolds.
  • Field emergency repairs: Individual DSZH fittings stocked in stock allow technicians to repair or modify hose connections on-site without returning to the shop for components.
Origin: Manufactured in USA

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Frequently asked questions

Common questions about DSZH from 3G Electric.

What thread types does DSZH use in its reduction adapters and manifold connections?

DSZH reducers and adapters employ both NPT (National Pipe Thread) and SAE flare standards. Common configurations include 1/8 NPT male (gauge port) paired with 1/4" or 5/16" SAE female (hose port), or SAE-to-SAE unions in 1/2", 5/8", and 7/8" sizes. This mix accommodates legacy gauge sets, modern recovery equipment, and hose-line configurations across North American and international refrigeration services.

Does DSZH stock bottle adapters and tips compatible with R600A refrigerants?

Yes. DSZH offers 420g bottle adapters rated for R600A and other common refrigerants. Adapter design includes proper sealing and pressure relief provisions for flammable (A3-class) refrigerants. Hose tips are also available in 7/8", 5/8", and smaller fractional diameters to suit R600A recovery and charge bottles.

Can I source individual DSZH fittings or must I buy complete manifold kits?

We stock DSZH components individually, including single reducers (COR15080, COR15082), connector caps (COR50133), extensions (COR50340), and hose tips (COR50127). Technicians can purchase one-off replacements without committing to full manifold assemblies, reducing downtime and spare-parts inventory cost.

What base or manifold options does DSZH provide for multi-port refrigerant service?

DSZH manufactures manifold bases with dual or quad connection ports, such as the unit offering 1/4" and 5/16" SAE ports (COR30026). These bases accept gauge hoses, recovery lines, and charge cylinders simultaneously, typical in combination gauge sets for air-conditioning and heat-pump service.

Are DSZH flare fittings and unions available in metric sizes, or only fractional inch?

DSZH's publicly listed product range emphasizes SAE fractional-inch diameters (1/4", 5/16", 5/8", 7/8") and NPT threads, reflecting North American and regional refrigeration standards. Metric variants may exist in the full catalog; contact us directly to confirm metric specifications if required for non-standard systems.

How do you support DSZH component availability in bulk or emergency orders?

We maintain 330+ SKUs of DSZH tools and fittings in its Woodlands warehouse. Orders placed online or by phone are dispatched same-day to Singapore-based customers and via standard freight to international addresses. Custom kits or high-volume requests may also be arranged through direct quotation.