SHK-306: Triple Pressure Control & Dual-Refrigerant AC Pressure Switch
This SHK-306 is a high-performance AC pressure protection solution engineered for all vehicle types, supporting both legacy and modern systems with precise triple pressure regulation and dual refrigerant compatibility.
| Category | Specification |
| Model Number | SHK-306 |
| Thread Size | 3/8-24UNF Male (Customizable) |
| Operating Pressure | HP OFF: 3.14MPa (Overpressure Protection) |
| MP OFF: 1.52MPa (Medium Pressure Regulation) |
| LP OFF: 0.196MPa (Underpressure Protection) |
| Refrigerant Compatibility | R-12; R-134a (Customizable) |
| Vehicle Fit | All Vehicle Models |
| Customization | Thread, Pressure Thresholds, Refrigerant |
It integrates seamlessly with standard AC pipelines via the 3/8-24UNF Male thread—an industry-common fitting that eliminates the need for adapters. The triple pressure control mechanism provides multi-layered protection and efficiency: HP OFF at 3.14MPa prevents compressor overheating and pipeline rupture, MP OFF at 1.52MPa balances cooling performance and energy consumption by regulating system load, and LP OFF at 0.196MPa avoids damage from refrigerant deficiency. Dual R-12/R-134a compatibility suits classic cars, modern vehicles, and aftermarket applications, while customization options cater to special vehicle configurations.
Superior Quality & Reliability Engineering
Quality is foundational to the SHK-306, with design and testing adhering to strict automotive industry standards. The switch features a corrosion-resistant brass housing that withstands extreme temperatures (-40℃ to 85℃) and engine compartment vibration, ensuring durability in harsh operating environments.
Its precision-calibrated pressure sensors offer a tolerance of ±0.05MPa, guaranteeing accurate response without false triggers. High-quality sealing materials compatible with both R-12 and R-134a refrigerants ensure leak-proof performance (leakage rate <1%), while the durable contact design passes over 100,000 pressure cycle tests—validating long-term reliability for the vehicle’s lifecycle.
Every unit undergoes rigorous quality inspections, including pressure threshold verification, leak testing, and temperature endurance trials. Batch production records and customization specs are fully traceable, backed by an 18-month warranty, providing confidence for users and business partners.
