Hey there! If you're researching high-pressure fire nozzles from China, you've probably seen the term "Close Type High Pressure Water Mist Nozzle 57℃"​ popping up. It sounds technical, right? But honestly, it's one of those components that can make or break a fire safety system. Let's break down what this actually means and why it matters for your project.

First off, the "Close Type" design refers to a nozzle that remains closed until a specific temperature triggers it to open – in this case, 57°C (about 134°F). This is super common in environments like libraries, data centers, or electrical rooms where you want the system to activate only when heat detection confirms a fire. The high-pressure part? These nozzles operate at around 8–15 MPa, creating an ultra-fine water mist that suppresses flames by cooling and starving the fire of oxygen, all while using less water .

Key Features & Why They Matter​

• Temperature Sensitivity: The 57°C rating is ideal for indoor spaces where early heat buildup occurs. It’s not too sensitive to avoid false alarms, but responsive enough to react before a fire escalates.

• Material & Durability: Most models use 316 stainless steel​ (like those from Lanzhong ), which resists corrosion in humid or chemical environments. This is huge for industrial settings.

• Spray Efficiency: With multiple micro-tips (usually 4–6), these nozzles produce a full-cone mist that covers areas up to 3x3 meters​ effectively.

Comparison: Close Type vs. Open Type​

Practical Tips for Selection​

1. Match the Temperature Rating: If your facility has higher ambient heat (like a kitchen), consider a nozzle with a higher trigger point (e.g., 68°C or 93°C).

2. Check Compatibility: Ensure the nozzle’s inlet size (e.g., M18×1.5 threads) fits your existing piping .

3. Prioritize Certifications: Look for CE, ISO9001, or CCCF marks to avoid quality issues. Suppliers like Osten Machinery (Xuzhou) Co., Ltd.​ (TEL: +086 15852310290) often provide certified options tailored to global standards.

️ Why This Nozzle Type is Gaining Popularity​

I’ve noticed more engineers opting for close-type nozzles in retrofit projects. Why? They’re cost-effective​ and integrate easily into existing systems without major overhauls. Plus, the fine mist minimizes water damage – a big win for places with expensive equipment.

If you’re sourcing these, always ask suppliers for flow rate data​ (K-factor) and pressure test reports. For example, some Chinese manufacturers offer custom OEM designs with tolerances as tight as 5% .

‍ Final Thoughts​

Don’t just pick the cheapest option. A well-designed nozzle can slash maintenance costs and boost safety. Reach out to specialists like Osten Machinery​ for samples – testing a unit firsthand beats guessing!

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# What is a Close Type High Pressure Water Mist Nozz 

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