Relays & Limit Switches: Quality Assurance and Technological Innovation

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Yueqing Huilong Industrial Control Electrical Appliances Co., Ltd.
Yueqing Huilong Industrial Control Electrical Appliances Co., Ltd.
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Comprehensive Introduction to Relays

Comprehensive Introduction to Relays

Relays are critical electrical control devices designed to automate circuit switching, widely used in industrial automation, power systems, and control circuits. The company specializes in manufacturing various relays, including time relays, solid-state relays, intermediate relays, RXM relays, RM control relays, liquid level relays, and phase sequence relays. Each product undergoes strict quality control, with the company adhering to a "quality-first" philosophy, continuously improving its quality management system, and introducing advanced international production and testing equipment. As the first in China's electrical industry to obtain ISO-9001 and IECO certifications, its relays guarantee reliability and compliance with global standards.
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Advantages

High-Quality Manufacturing and Strict Quality Control

The company ensures high-quality relay production through strict quality control, regarding quality as the lifeline of the enterprise. It continuously improves the quality management system and introduces international advanced production and testing equipment, ensuring each relay meets rigorous standards. The relays have passed ISO-9001 quality system certification and International Electrotechnical Commission IECO certification, demonstrating reliable quality and international recognition.

Advanced Technology and Long Service Life

Solid-state relays adopt semiconductor devices for contactless control, featuring fast switching speed, long service life, and strong anti-interference ability. Compared with traditional mechanical relays, they have no mechanical wear, reduce maintenance costs, and are suitable for high-frequency operation scenarios. Other relays like intermediate relays also use advanced design concepts to ensure stable performance and prolonged service life, providing reliable long-term use for users.

Precise Control and Signal Conversion Capability

Intermediate relays play a key role in control circuits by amplifying signals, increasing the number of contacts, and realizing signal conversion, enabling precise control of other electrical equipment. Phase sequence relays can accurately detect the phase sequence of three-phase power supplies and promptly issue signals or cut off circuits when phase sequence errors or phase loss occur, effectively protecting equipment safety. These functions make relays critical components for ensuring the accuracy and stability of electrical systems.

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The small relays, which are less than 25 mm in width, are compact electromechanical products within the scope of low-power control circuits. The relays have high contact density, featuring as much as 8 poles in a single unit, and low coil power consumption from 100 mW to 2 W. They are available in both Surface Mount Technology (SMT) and Through Hole Technology (THT) which further enables their use in automated PCB assembly. Their industrial versions have IP65 rating and provide hermetically sealed contacts for more harsh environments like oil mist and dust, which most industrial environments face. Their uses are diverse, with some of them being automotive relays (controlling window lifts and ECU control), home appliances like washing machines, and smart devices. Their use is driven by the environment friendly RoHS compliant lead free construction which acts in defense of global market competition.

Frequently Asked Questions

What quality certifications do the company's relays have?

The company's relays have passed ISO-9001 quality system certification and International Electrotechnical Commission IECO certification. These certifications demonstrate that the relays meet rigorous international quality standards, backed by strict quality control processes, continuous improvement of the quality management system, and the use of advanced international production and testing equipment.
The company produces various relays, including time relays, solid-state relays, intermediate relays, RXM relays, RM control relays, liquid level relays, and phase sequence relays. These are applied in diverse electrical control systems such as industrial automation, power control, and liquid level control systems, catering to needs like signal amplification, circuit protection, and state detection across different industries.
Solid-state relays use semiconductor devices for contactless control, offering fast switching speed, long service life, and strong anti-interference capability. Unlike traditional mechanical relays, they have no mechanical wear, reducing maintenance costs and being suitable for high-frequency operation scenarios. Other relays like intermediate relays also feature advanced designs for stable performance and prolonged usability.
Yes, the company has professional R&D capabilities and a customer-centric approach, capable of developing relays tailored to specific industry needs. Whether for special environmental requirements (e.g., high temperature, high humidity) or customized functional designs, the R&D team can provide targeted solutions, ensuring products meet both standard specifications and unique application scenarios to enhance competitiveness.
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Customer Reviews

John Smith
Exceptional Quality and Reliable Certifications

I’ve been using the company’s relays for my industrial automation projects, and the ISO-9001 and IECO certifications give me full confidence in their quality. The strict quality control is evident in every relay—they’ve never failed in high-load applications. The solid-state relays, in particular, stand out with their fast switching and zero mechanical wear, reducing our maintenance costs significantly. Highly recommended for anyone prioritizing reliability.

Sarah Miller
Customized Solutions for Unique Requirements

We had a special project requiring relays resistant to high humidity and corrosive gases. The company’s R&D team worked closely with us to develop a tailored solution, and the result exceeded our expectations. The customized relays have performed reliably in our harsh environment, proving their commitment to the customer-centric approach. Their ability to turn specific needs into functional products is why we trust them for critical applications.

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Professional R&D and Customization Services

Professional R&D and Customization Services

With continuous innovation and professional R&D capabilities, the company can develop relays tailored to specific industry needs. Whether for special environmental requirements (e.g., high temperature, high humidity) or customized functional designs, the team can provide targeted solutions. This customer-centric approach ensures that the relays not only meet standard specifications but also adapt to unique application scenarios, enhancing customer satisfaction and product competitiveness.
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Yueqing Huilong provides advanced industrial control appliances and relays for global markets. Our ISO-9001 certified products ensure quality and reliability. Contact us today!

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No. 3789 Liujiang Road, Liushi Town,Yueqing City, Wenzhou City, Zhejiang Province, 325604

+86-18155034103

[email protected]

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