停暖保養關鍵：良工閥門教你正確關閥順序，延長供暖系統壽命

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

　　每年供暖季結束，閥門操作不當導致管道銹蝕、漏水、來年供暖不暢的問題頻發，成為家庭采暖的高頻痛點。據暖通行業統計，超60%的供暖系統故障源于停暖后閥門關閉順序錯誤、密封失效，導致空氣進入管道引發氧化腐蝕。作為暖通管路控制核心部件，良工閥門以專業品質與標準化操作指南，為家庭供暖系統“停暖保養”筑牢防線，從源頭規避管路老化、堵塞風險。

　　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、關閥順序錯，管道3年就報廢！專業操作必須牢記

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

　　停暖后閥門關閉并非簡單擰緊，順序錯誤會直接破壞管路滿水保養狀態，加速設備老化。正確操作核心原則：先關回水閥，再關供水閥，兩步操作缺一不可。

　　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. 關閉回水閥（第一步）

　　1. Close the return valve (first step)

　　回水閥多位于暖氣片下方、地暖分集水器右側或入戶管道井內，標注“回水”字樣。操作時順時針緩慢擰緊至完全閉合，阻斷管道內回水流通，將系統內水體穩定封存，避免因壓力變化導致水體流失，為滿水保養奠定基礎。

　　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. 關閉供水閥（第二步）

　　2. Close the water supply valve (Step 2)

　　待回水閥完全閉合后，再關閉位于暖氣片上方、入戶進水口的供水閥（標注“進水/供水”）。同樣順時針擰緊至無松動，徹底切斷管路與外部系統連接，形成全封閉滿水腔體，有效隔絕空氣進入——這是防止鋼制、銅鋁復合暖氣片及管道內壁氧化生銹、結垢堵塞的核心關鍵。

　　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.

　　若順序顛倒（先關供水閥），回水閥仍開啟時，管道內水體易被外部管網抽離，形成空管或半管狀態，空氣大量侵入后，管路銹蝕速度會提升3倍以上，3-5年就可能出現滲漏、堵塞問題。

　　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、良工閥門：精準密封+耐用品質，守護停暖保養全周期

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

　　關閥保養的效果，核心取決于閥門的密封可靠性與使用壽命。良工閥門深耕暖通管路控制領域多年，嚴格遵循GB、JB等國內外標準生產，產品覆蓋閘閥、截止閥、球閥等全品類暖通專用閥門，適配家庭供暖、市政供熱等多場景。

　　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.

　　- 密封性能拉滿，杜絕滲漏虛閉

　　-Full sealing performance to prevent leakage and virtual closure

　　良工暖通專用閥門采用錐形密封結構，密封面精選不銹鋼與硬質合金材質，搭配柔性石墨填料，啟閉10000次仍保持零泄漏。停暖關閉后能牢牢鎖閉管路水體，避免因閥門密封失效導致水體流失、空氣滲入，從部件層面保障滿水保養效果，解決普通閥門“關不嚴、易松動”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，適配長期靜置場景

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

　　閥體采用精密鑄造工藝，材質致密性強，耐壓耐溫性能穩定，可適應-20℃至180℃的工況變化。非供暖季長期靜置時，不會因環境濕度、溫度變化出現銹蝕、卡滯問題，次年供暖季啟閉依舊順暢，避免因閥門損壞導致更換、維修成本增加。

　　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.

　　- 規格齊全，適配全類型供暖系統

　　-Complete specifications, suitable for all types of heating systems

　　針對暖氣片、地暖等不同系統，良工提供螺紋、法蘭等多種連接方式，口徑覆蓋DN15-DN50全規格。無論是分戶控制的入戶總閥，還是單組暖氣片分支閥，均能精準匹配，確保家庭供暖系統每個控制節點都有可靠保障。

　　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大注意事項，良工閥門護航系統長效運行

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

　　1. 嚴禁私自放水排氣

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

　　關閉閥門后，切勿打開暖氣片排氣閥、排污閥，一旦放水排氣，滿水保養失效，管道內壁直接接觸空氣，氧化腐蝕速度大幅提升。

　　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. 檢查閥門接口，及時排查滲漏

　　2. Check the valve interface and promptly identify any leaks

　　停暖后因熱脹冷縮，閥門與管路接口易出現輕微滲水。若發現良工閥門周邊有水滴，無需自行拆卸，可聯系專業人員緊固或更換密封墊，保障系統密閉性。

　　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. 來年供暖前規范開啟

　　3. Standardized opening before heating next year

　　次年供暖前1周，按“先開供水閥，后開回水閥”的順序開啟閥門，避免系統壓力失衡，確保熱水順暢循環。

　　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.

　　供暖系統保養，始于細節，成于專業。良工閥門以高標準制造工藝+標準化操作指導，破解停暖后閥門操作痛點，讓家庭供暖系統實現“一次正確操作，多年穩定運行”，有效延長管路與暖氣片使用壽命，減少故障與維修成本，為溫暖舒適的家居生活筑牢根基。本文由 良工閥門 友情奉獻.更多有關的知識請點擊 http://www.1jiaotong.com/ 真誠的態度.為您提供為全面的服務.更多有關的知識我們將會陸續向大家奉獻.敬請期待.

　　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.1jiaotong.com/ Sincere attitude To provide you with comprehensive services We will gradually contribute more relevant knowledge to everyone Coming soon.