Tiếng Việt
ភាសាខ្មែរIn pneumatic systems, water supply pipelines, pressure tanks, or fire protection equipment, sudden overpressure situations are not uncommon. What’s noteworthy is that many incidents occur simply due to incorrect operation of the lever-type pressure relief valve, or because the valve was unintentionally triggered by someone else. For this reason, leverless brass safety valves are becoming a preferred choice in systems that demand automatic safety, simplified operation, and minimised risk.
Are you looking for a type of relief valve that operates fully automatically based on system pressure, without any manual intervention? Do you want to ensure stable equipment operation while maintaining easy installation and reasonable cost? Let’s take a closer look at the A3 Hisec leverless brass safety valve – a compact yet powerful device that is gaining popularity today.
Features of the Hisec A3 Brass Safety Valve without Handle
- The valve has a slim cylindrical design with a horizontal discharge outlet, making it ideal for vertical installation on pipelines.
- The entire body is made from solid brass, showcasing a distinctive brass-colored finish.
- The top of the valve is cast in one solid piece, with no mechanical lever, unlike some traditional safety valve models.
- The “HISEC” brand name is embossed directly onto the valve body, indicating its manufacturer.
- The valve base features a standard male-threaded connection, allowing for easy installation onto pressurised equipment or pipelines.
- The horizontal discharge outlet allows pressure to be released directly into the environment or redirected through a separate discharge line.
-> See also: Hisec Brass Safety Valve with Lever
Technical Specifications of the Hisec A3 Brass Safety Valve without Handle
- Origin: Taiwan
- Model: A3
- Size Range: DN15 – DN50
- Material: Brass
- Connection Type: Threaded
- Valve Type: Leverless Safety Valve
- Operating Pressure: 0.3 – 10 kg/cm²
- Operating Temperature: -45°C to 185°C
Price List for Hisec Leverless Brass Safety Valves
Below is a REFERENCE PRICE LIST for popular Hisec leverless brass safety valves available in the Vietnamese market (updated January 2025). Please note that prices may vary depending on the dealer, order quantity, and raw material fluctuations.
👉 For the latest and most accurate price quotations, please contact us directly:
Bao Tin Steel Sales Contact
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| Product Code | Size (DN) | Operating Pressure | Connection Type | Reference Retail Price (VND) |
|---|---|---|---|---|
| HISEC-VAD15 | DN15 (1/2″) | 10 bar | External Thread | 125,000 – 145,000 |
| HISEC-VAD20 | DN20 (3/4″) | 10 bar | External Thread | 155,000 – 175,000 |
| HISEC-VAD25 | DN25 (1″) | 10 bar | External Thread | 185,000 – 215,000 |
| HISEC-VAD32 | DN32 (1 1/4″) | 10 bar | External Thread | 235,000 – 265,000 |
| HISEC-VAD40 | DN40 (1 1/2″) | 10 bar | External Thread | 295,000 – 330,000 |
| HISEC-VAD50 | DN50 (2″) | 10 bar | External Thread | 380,000 – 420,000 |
Advantages and Applications of Leverless Safety Valves
Advantages
- The valve operates fully automatically without manual intervention, eliminating risks caused by incorrect handling. When pressure exceeds the set limit, the valve quickly and accurately releases pressure, protecting the system from explosion, leakage, or equipment damage.
- Compact design makes it suitable for confined spaces such as accumulator tanks or air compressors. Easy installation with standard threaded connections, requiring no electricity or complex control systems.
- Made from corrosion-resistant brass, the valve operates reliably in water or pneumatic environments. It requires minimal maintenance, has a long service life, and is ideal for systems needing long-term reliability.
Practical Applications
Here are some common applications of the leverless safety valve:
- Used in accumulator tanks, air compressor systems, high-pressure water pumps, and closed hydraulic systems.
- In fire protection equipment (FPE), it is installed in CO₂ and N₂ fire extinguishing cylinders or at the outlet of high-pressure foam generators.
- Applied in the HVAC industry, including refrigeration systems and temperature-pressure control in central air conditioning units.
- Utilised in wastewater treatment systems, pressure tanks, and high-pressure filtration systems in the environmental sector.
Conclusion
The leverless brass safety valve is an optimal choice for systems requiring automatic pressure relief, safety, and easy installation. With its simple design, durable materials, and reasonable price, this product is widely used in industrial, fire protection, and residential applications.
At Bao Tin Steel, we not only supply steel pipes and pipe fittings but also offer a diverse range of high-quality valves and faucets. We are confident in providing comprehensive solutions for your projects. For quotations on various materials, don’t hesitate to call our hotline at 0932 059 176.