Dry-Type Starter（DP-1）

dry starter is a start-up control device designed based on a liquid-free medium (such as oil, water). It is primarily designed for scenarios where fluid leakage risks need to be avoided or harsh operating conditions must be adapted to. Through its dry-type insulation and cooling structure, it achieves stable start-up control of loads such as motors and fire protection equipment, serving as a key device replacing traditional wet-type starters in the industrial and fire protection fields. Not only does it address the leakage issue of traditional wet-type starters, but it also meets the start-up control requirements in various harsh scenarios through its advantages of compact structure and low operational and maintenance costs. Especially in the current context of enhanced safety standards and stricter environmental protection requirements, it has become the preferred equipment in high-risk and high-demand fields.
● Pressure Sensing Unit：Piston type (stainless steel piston) / Diaphragm type (NBR/FKM diaphragm)
● Sealing Unit：FKM O-rings / PTFE guide rings
● Trigger Unit：Stainless steel
● Burst Pressure：≥2.5MPa (1.8 times working pressure)
● Leakage Rate：Leakage volume ≤3ml/h under 1.2MPa pressure after 24h gas chamber holding pressure
● Fatigue Life：No leakage/deformation after 500,000 pressure cycles (0~1.2MPa)
● Temperature Range：
"Normal type: -30℃~70℃
Wide temperature type: -40℃~85℃"
● Humidity：≤95% RH (non-condensing)
● OEM Service：Accepted
● Delivery Terms：FOB, CFR, CIF, EXW
● Payment Mode：T/T, L/C, PayPal, Western Union

Product category:

UL/FM Alarm Check Valve

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Product Details

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Product Formation

The dry starter is a core control component of the dry alarm valve in a dry automatic sprinkler system. It triggers the valve’s opening by sensing changes in system pressure, releases compressed air from the pipeline, and guides fire-extinguishing water into sprinkler heads to suppress fires.

As a key technical solution for preventing freezing in automatic sprinkler systems in cold regions, its development integrates pressure sensing technology, advanced sealing processes, and low-temperature adaptability design—ensuring long-term stable operation in dry, sub-zero environments. It is the backbone of the dry system’s ability to deliver rapid response and zero freeze damage.

Through the systematic engineering of "low-temperature elastic materials – precise linkage structures – full-process sealing control – multi-environment validation," the dry starter evolves into the dry automatic sprinkler system’s "pressure trigger engine."

Its core advantages lie in:

Rapid response (≤80ms trigger delay);

Long-lasting sealing (zero leakage for 5 years);

Reliability at -30℃ (no performance degradation in cold conditions).

These features ensure that dry systems in cold regions (e.g., data centers, cold storage, northern high-rise buildings) can quickly release water to control fires without pipe freeze damage—providing critical, safe fire protection when it matters most.

KEY WORDS： Dry Alarm Valve Starte，Dry Alarm Valve Starte，Dry Pressure Starter，Pressure Sensing Starter，Rapid Response Starter，Long-Lasting Sealing Starter，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 core feature of a "dry starter" lies in its liquid-free medium (e.g., oil, water) - based structural design. It is mainly used in starting scenarios where fluid leakage needs to be avoided or harsh environments must be adapted to (such as motor starting, fire protection system activation, etc.). The specific features are as follows:

1. Structure & Medium: Liquid-free, relying on dry-type insulation/cooling

It has a relatively compact structure, eliminating the need for reserved space for the storage or circulation of liquid media. This reduces the overall volume of the equipment.

2. Safety: Low leakage risk, suitable for special environments

It has no hidden danger of liquid medium leakage, avoiding equipment short circuits, environmental pollution, or fire risks caused by leakage. It is especially suitable for flammable and explosive scenarios (e.g., chemical workshops, oil and gas storage tank areas) and clean environments.

3. Environmental Adaptability: Temperature and moisture resistance

It has a wide application range and higher tolerance to ambient temperature and humidity. It can work stably in a broad temperature range of -20℃ ~ 60℃ and is not prone to insulation performance degradation due to humid environments.

4. Maintenance Cost: Simple operation and maintenance, long service life

It eliminates the need for regular replacement of liquid media (e.g., insulating oil) and inspection of medium purity or liquid level. Daily maintenance only requires surface cleaning and insulation status checking, which reduces the workload and cost of operation and maintenance.

5. Starting Performance: Stable response, suitable for frequent start-stop cycles

There is no "hysteresis effect" of liquid media (e.g., viscous resistance of oil) during the starting process, resulting in higher control accuracy of current and voltage. It is suitable for equipment requiring high starting speed and stability (e.g., precision motors, dry-type deluge valves for fire protection).

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Product Parameter

Parameter	Value/Description	Description
Type	Core control unit for dry pipe automatic sprinkler systems	Integrates pressure sensing, trigger linkage, and sealing alarm functions
Applicable System	Dry pipe automatic sprinkler system (matches DN15~DN50 dry alarm valve bore diameter)	Suitable for single-lock/double-lock dry pipe alarm valves
Core Functions	Pressure difference sensing, rapid valve triggering, long-term sealing pressure maintenance, low-temperature reliability	Resolves "anti-freeze" and "fast response" contradictions in dry pipe systems
Trigger Delay	Trigger time ≤80ms when pressure drop rate reaches 0.2MPa/s	Pressure sensor + high-speed camera recording (accuracy ±1ms)
Reset Time	Valve disc fully resets within ≤5s after system recharging to 1.2MPa	Stopwatch + displacement sensor monitoring
Burst Pressure	≥2.5MPa (1.8 times working pressure)	Hydrostatic burst test bench (pressurization rate: 0.1MPa/s)
Leakage Rate	Leakage volume ≤3ml/h under 1.2MPa pressure after 24h gas chamber holding pressure	Helium mass spectrometry leak detection (leakage rate ≤1×10⁻⁶ mbar·L/s)
Fatigue Life	No leakage/deformation after 500,000 pressure cycles (0~1.2MPa)	Automated pressure cycling test bench (rate: 0.3MPa/s)
Temperature Range	Normal type: -30℃~70℃ Wide temperature type: -40℃~85℃
Humidity	≤95% RH (non-condensing)
Pressure Sensing Unit	Piston type (stainless steel piston) / Diaphragm type (NBR/FKM diaphragm)
Sealing Unit	FKM O-rings / PTFE guide rings
Trigger Unit	Stainless steel

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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！