Dry sprinkler head ZSTGX 80-68℃ dry pendant sprinkler head fire sprinkler head FM/UL

The detailed parameters of the dry sprinkler ZSTGX 80-68℃ (dry pendant type) revolve around four core design principles: "low-temperature adaptability, delayed anti-misoperation, high-efficiency coverage, and dual-certification reliability." Key specifications (such as -40℃ low-temperature activation, precise 30-second delay, and a K80 flow coefficient of 8.9L/min) all meet FM/UL dual-certification standards. Through structural optimization (H62 brass body, stainless steel delay mechanism, FKM diaphragm) and performance testing (salt spray corrosion resistance ≥300h, vibration testing without failure), it ensures long-term stable operation in extreme environments like cold storage and outdoor equipment areas, providing a "freeze-proof, anti-misoperation, high-efficiency" fire protection solution for low-temperature settings.

● Sprinkler Body：Brass
● Product Model：ZSTGX 80 - 68℃
● Product Type：Closed - type dry pendant fire sprinkler head
● Nominal Size (DN)：DN20
● Operating Temperature：68℃±3℃
● Connection Method：NPT 3/4" threaded connection
● Working Pressure Range：0.14MPa～1.2MPa
● Rated Working Pressure (P)：0.14MPa (design reference pressure of dry pipe system)
● Flow Coefficient (K - value)：K = 80
● OEM Service：Accepted
● Delivery Terms：FOB, CFR, CIF, EXW
● Payment Mode：T/T, L/C, PayPal, Western Union

Product category:

UL/FM Fire Sprinkler

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linhaifeng117@gmail.com

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Product Details

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Product Formation

The ZSTGX 80-68℃ Dry Pendant Sprinkler is a closed-type automatic fire suppression component specifically designed for cold or freeze-prone environments. It addresses the risk of wet sprinklers cracking in low temperatures through a "compressed air pipe network + delayed exhaust mechanism," making it suitable for warehouses, cold storage facilities, outdoor equipment areas, and buildings in northern regions. Its development deeply integrates low-temperature adaptability design, precise delay control, and FM/UL dual-certification standards.

The ZSTGX 80-68℃ Dry Pendant Sprinkler (FM/UL certified) features a "low-temperature-resistant brass body + 30-second precise delayed venting + pendant-type coverage design" as its core, addressing the issues of freezing and accidental discharge faced by wet sprinklers in cold environments. With strict process control under FM/UL dual certification, it ensures long-term reliable operation in scenarios such as cold storage and outdoor equipment areas, providing "freeze-proof, precise, and efficient" fire protection for low-temperature environments. It is a key component of automatic sprinkler systems in cold regions.

KEY WORDS： Dry pendant sprinkler，ZSTGX 80-68℃ Dry Pendant Sprinkler，80-68℃ Dry Pendent Sprinkler FM Approved，Dry sprinkler head 68℃ FM UL dual certification，Pendant Dry Sprinkler FM/UL，China, manufacturers, suppliers, wholesale, factory.

Other Classifed Products：

Fire Hose Categories, Fire Sprinkler System, Fire Protection Valve , Fire Hose Reel&Cabinet , Fire Foam Equipment，Fire Nozzle and Fire Monitor , Fire Hydrant , UL/FM Fire Fighting Equipment , Brass Valve Categories , Fire Extinguisher Series .

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Product Features

The ZSTGX 80-68℃ Dry Pendant Sprinkler is a closed-type fire protection component specifically designed for cold/freezing environments. It addresses common issues such as freezing cracks, accidental discharge, and insufficient coverage of wet sprinklers through three core technologies: "compressed air delayed exhaust + low-temperature-resistant structure + precise temperature control." Its features include:

Low-Temperature-Resistant Body Material: Made of cast brass with excellent low-temperature impact toughness. The surface is electrostatically coated with epoxy resin, providing salt spray corrosion resistance (5% NaCl, 35℃) ≥500h without rust. It can withstand long-term exposure to temperatures ranging from -40℃ to 80℃, eliminating the risk of wet sprinkler cracking due to frozen water in pipelines.
Compressed Air Isolation Design: The pipeline is filled with 0.3~0.5MPa compressed air, completely isolating the sprinkler’s air chamber and retarder from water. This prevents freezing risks in low temperatures, ensuring stable monitoring (even at -40℃, the body and internal components remain crack-resistant).
68℃ High-Sensitivity Thermal Element: The red glass bulb contains an alcohol-ether mixture, remaining intact after 1000h of storage at -40℃. Activation response time ≤0.5s with no delay at high temperatures, ensuring rapid response during fires.
Pendant Installation for Precise Coverage: Equipped with an adjustable 304 stainless steel hanger rod (100~300mm), the sprinkler is vertically downward, concentrating water flow on low-level fire sources such as shelf bottoms and equipment surfaces (e.g., cold storage stacks, electrical cabinet bases), avoiding coverage gaps caused by dispersed water.
Compatible Connection: DN20 threaded interface fits galvanized steel/stainless steel pipes in dry systems without special adapters.
Ready-to-Install: Adjustable pendant rod length supports installation heights of 0.8~1.5m. A single sprinkler can be installed by one person within 5 minutes, making it ideal for retrofitting existing fire protection pipelines.

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Product Parameter

Parameter Item	Specification/Value/Description
Product Model	ZSTGX 80 - 68℃
Product Type	Closed - type dry pendant fire sprinkler head
Nominal Size (DN)	DN20
Operating Temperature	68℃±3℃
Connection Method	NPT 3/4" threaded connection
Working Pressure Range	0.14MPa～1.2MPa
Rated Working Pressure (P)	0.14MPa (design reference pressure of dry pipe system)
Flow Coefficient (K - value)	K = 80
Delayed Start Time	≤30s (static hot start test at 68℃)
Spray Distance	At rated pressure 0.14MPa: vertical downward spray distance ≥8.0m (horizontal distance from sprinkler outlet)
Coverage Radius	When installation height is 1.5m, standard coverage radius is 11.5m (rectangular layout spacing ≤11.5m×11.5m)
Response Time Index (RTI)	≤50 (m·s)⁰·⁵ (action response at 68℃ action temperature)
Sprinkler Body	Brass
Applicable Ambient Temperature	- 40℃～80℃ (storage and operating temperature)
Installation Height	0.8m～1.5m (pendant design, sprinkler is vertically downward)

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FAQ

Q: Can you accept sample order?

A: Yes, we accept samples with little and reasonable charge.But need customer pay sample fees and transport fees first.

Q: What is your payment terms?
A: Payment supports T/T, L/C, etc.

Q: How can l get my order?
A: We will send you the goods by UPS,DHL,FedEx,Oversea Shipment or other forwarder, all with tracking number.

Q: Why choose us?
A： With over 15 years of experience in the fire protection industry, our company has professional technical personnel and many well-known partners in the domestic market. We offer favorable prices and guarantee quality, having passed multiple certifications!

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With more than 15 years of experience serving clients, we have developed extensive expertise and in-depth industry knowledge, enabling us to deliver reliable and effective solutions tailored to your requirements.
We provide professional technical support and customized service offerings. Our committed technical team is available to assist you with product consultation, installation guidance, and comprehensive after-sales support whenever necessary.
At Sheng Feng Fire, our professionals are dedicated to helping you select the most suitable products based on your specific needs.
Please do not hesitate to contact us for further information！