停暖保养关键：良工阀门教你正确关阀顺序，延长供暖系统寿命

　　Key to stopping heating and maintenance: Lianggong Valve teaches you the correct sequence of valve closing, extending the service life of the heating system

　　每年供暖季结束，阀门操作不当导致管道锈蚀、漏水、来年供暖不畅的问题频发，成为家庭采暖的高频痛点。据暖通行业统计，超60%的供暖系统故障源于停暖后阀门关闭顺序错误、密封失效，导致空气进入管道引发氧化腐蚀。作为暖通管路控制核心部件，良工阀门以专业品质与标准化操作指南，为家庭供暖系统“停暖保养”筑牢防线，从源头规避管路老化、堵塞风险。

　　At the end of each heating season, improper valve operation leads to frequent problems such as pipeline corrosion, water leakage, and poor heating in the following year, becoming a high-frequency pain point for home heating. According to statistics from the HVAC industry, over 60% of heating system failures are caused by incorrect valve closing sequence and seal failure after heating shutdown, resulting in air entering the pipeline and causing oxidation and corrosion. As the core component of HVAC pipeline control, Lianggong Valve provides professional quality and standardized operation guidelines to build a solid defense line for the "shutdown maintenance" of home heating systems, avoiding the risk of pipeline aging and blockage from the source.

　　一、关阀顺序错，管道3年就报废！专业操作必须牢记

　　1、 Wrong valve closing sequence, pipeline will be scrapped in 3 years! Professional operations must be kept in mind

　　停暖后阀门关闭并非简单拧紧，顺序错误会直接破坏管路满水保养状态，加速设备老化。正确操作核心原则：先关回水阀，再关供水阀，两步操作缺一不可。

　　Closing the valve after stopping the heating process is not a simple matter of tightening. Incorrect sequence can directly damage the pipeline's full water maintenance status and accelerate equipment aging. The core principle of correct operation is to first close the return water valve, and then close the supply water valve. Both steps of operation are indispensable.

　　1. 关闭回水阀（第一步）

　　1. Close the return valve (first step)

　　回水阀多位于暖气片下方、地暖分集水器右侧或入户管道井内，标注“回水”字样。操作时顺时针缓慢拧紧至完全闭合，阻断管道内回水流通，将系统内水体稳定封存，避免因压力变化导致水体流失，为满水保养奠定基础。

　　The return valve is often located under the radiator, on the right side of the underfloor heating water collector, or in the entrance pipe well, marked with the word "return water". During operation, slowly tighten clockwise until fully closed, blocking the return water flow in the pipeline, stabilizing and sealing the water body in the system, avoiding water loss due to pressure changes, and laying the foundation for full water maintenance.

　　2. 关闭供水阀（第二步）

　　2. Close the water supply valve (Step 2)

　　待回水阀完全闭合后，再关闭位于暖气片上方、入户进水口的供水阀（标注“进水/供水”）。同样顺时针拧紧至无松动，彻底切断管路与外部系统连接，形成全封闭满水腔体，有效隔绝空气进入——这是防止钢制、铜铝复合暖气片及管道内壁氧化生锈、结垢堵塞的核心关键。

　　After the return valve is fully closed, close the water supply valve located above the radiator and at the inlet of the household (marked as "inlet/supply"). Similarly, tighten clockwise until there is no looseness, completely cut off the connection between the pipeline and the external system, form a fully enclosed water filled chamber, and effectively isolate air from entering - this is the core key to preventing oxidation, rust, scaling, and blockage of steel, copper aluminum composite radiators and pipeline inner walls.

　　若顺序颠倒（先关供水阀），回水阀仍开启时，管道内水体易被外部管网抽离，形成空管或半管状态，空气大量侵入后，管路锈蚀速度会提升3倍以上，3-5年就可能出现渗漏、堵塞问题。

　　If the order is reversed (close the water supply valve first) and the return valve is still open, the water in the pipeline is easily pulled away by the external pipe network, forming a hollow or semi hollow state. After a large amount of air enters, the corrosion rate of the pipeline will increase by more than three times, and leakage and blockage problems may occur within 3-5 years.

　　二、良工阀门：精准密封+耐用品质，守护停暖保养全周期

　　2、 Lianggong Valve: precise sealing+durable quality, guarding the entire cycle of heating and maintenance

　　关阀保养的效果，核心取决于阀门的密封可靠性与使用寿命。良工阀门深耕暖通管路控制领域多年，严格遵循GB、JB等国内外标准生产，产品覆盖闸阀、截止阀、球阀等全品类暖通专用阀门，适配家庭供暖、市政供热等多场景。

　　The effectiveness of valve maintenance depends on the sealing reliability and service life of the valve. Lianggong Valve has been deeply involved in the field of HVAC pipeline control for many years, strictly following domestic and international standards such as GB and JB for production. Its products cover a full range of HVAC special valves such as gate valves, globe valves, ball valves, etc., and are suitable for multiple scenarios such as home heating and municipal heating.

　　- 密封性能拉满，杜绝渗漏虚闭

　　-Full sealing performance to prevent leakage and virtual closure

　　良工暖通专用阀门采用锥形密封结构，密封面精选不锈钢与硬质合金材质，搭配柔性石墨填料，启闭10000次仍保持零泄漏。停暖关闭后能牢牢锁闭管路水体，避免因阀门密封失效导致水体流失、空气渗入，从部件层面保障满水保养效果，解决普通阀门“关不严、易松动”的通病。

　　Lianggong HVAC special valves adopt a conical sealing structure, with selected stainless steel and hard alloy sealing surfaces, matched with flexible graphite packing, and can maintain zero leakage even after 10000 opening and closing cycles. After shutting down the heating system, the water in the pipeline can be firmly locked to prevent water loss and air infiltration caused by valve sealing failure. This ensures the effectiveness of full water maintenance at the component level and solves the common problem of "not tightly closed and easy to loosen" of ordinary valves.

　　- 耐用抗腐，适配长期静置场景

　　-Durable and corrosion-resistant, suitable for long-term static scenarios

　　阀体采用精密铸造工艺，材质致密性强，耐压耐温性能稳定，可适应-20℃至180℃的工况变化。非供暖季长期静置时，不会因环境湿度、温度变化出现锈蚀、卡滞问题，次年供暖季启闭依旧顺畅，避免因阀门损坏导致更换、维修成本增加。

　　The valve body adopts precision casting technology, with strong material density and stable pressure and temperature resistance, and can adapt to changes in working conditions from -20 ℃ to 180 ℃. When left idle for a long time during the non heating season, there will be no rusting or sticking problems due to changes in environmental humidity and temperature. The opening and closing will still be smooth during the following heating season, avoiding increased replacement and maintenance costs caused by valve damage.

　　- 规格齐全，适配全类型供暖系统

　　-Complete specifications, suitable for all types of heating systems

　　针对暖气片、地暖等不同系统，良工提供螺纹、法兰等多种连接方式，口径覆盖DN15-DN50全规格。无论是分户控制的入户总阀，还是单组暖气片分支阀，均能精准匹配，确保家庭供暖系统每个控制节点都有可靠保障。

　　For different systems such as radiators and underfloor heating, Lianggong provides various connection methods such as threads and flanges, with diameters covering the full range of DN15-DN50 specifications. Whether it is the household controlled main valve or the single group radiator branch valve, they can be accurately matched to ensure reliable protection for each control node of the home heating system.

　　三、停暖后3大注意事项，良工阀门护航系统长效运行

　　3、 3 major precautions after stopping heating: Long term operation of Lianggong Valve Escort System

　　1. 严禁私自放水排气

　　1. It is strictly prohibited to release water and exhaust without authorization

　　关闭阀门后，切勿打开暖气片排气阀、排污阀，一旦放水排气，满水保养失效，管道内壁直接接触空气，氧化腐蚀速度大幅提升。

　　After closing the valve, do not open the radiator exhaust valve or drain valve. Once the water is drained for exhaust, full water maintenance will fail, and the inner wall of the pipeline will directly contact the air, greatly increasing the oxidation and corrosion rate.

　　2. 检查阀门接口，及时排查渗漏

　　2. Check the valve interface and promptly identify any leaks

　　停暖后因热胀冷缩，阀门与管路接口易出现轻微渗水。若发现良工阀门周边有水滴，无需自行拆卸，可联系专业人员紧固或更换密封垫，保障系统密闭性。

　　After stopping heating, slight water leakage may occur at the valve and pipeline interface due to thermal expansion and contraction. If water droplets are found around the valve of Lianggong, there is no need to disassemble it by yourself. You can contact professional personnel to tighten or replace the sealing gasket to ensure the airtightness of the system.

　　3. 来年供暖前规范开启

　　3. Standardized opening before heating next year

　　次年供暖前1周，按“先开供水阀，后开回水阀”的顺序开启阀门，避免系统压力失衡，确保热水顺畅循环。

　　One week before heating the following year, open the valves in the order of "first open the water supply valve, then open the return valve" to avoid system pressure imbalance and ensure smooth circulation of hot water.

　　供暖系统保养，始于细节，成于专业。良工阀门以高标准制造工艺+标准化操作指导，破解停暖后阀门操作痛点，让家庭供暖系统实现“一次正确操作，多年稳定运行”，有效延长管路与暖气片使用寿命，减少故障与维修成本，为温暖舒适的家居生活筑牢根基。本文由 良工阀门 友情奉献.更多有关的知识请点击 http://www.jnlgvf.com/ 真诚的态度.为您提供为全面的服务.更多有关的知识我们将会陆续向大家奉献.敬请期待.

　　Heating system maintenance starts with details and becomes professional. Lianggong Valve uses high standard manufacturing technology and standardized operation guidance to solve the pain points of valve operation after heating shutdown, enabling the home heating system to achieve "correct operation once, stable operation for many years", effectively extending the service life of pipelines and radiators, reducing faults and maintenance costs, and laying a solid foundation for warm and comfortable home life. This article is a friendly contribution from Lianggong Valve For more related knowledge, please click http://www.jnlgvf.com/ Sincere attitude To provide you with comprehensive services We will gradually contribute more relevant knowledge to everyone Coming soon.