All-brass cast construction,wear-resistant,corrosion-resistant and high-temperature resistant. This solenoid for not only keeps constant current flowing steadily,but also prevents dry burning and monitors. The machine has power consumption,and the is stable and adjustable. Normally closed solenoid for for or oil. It is suitable for tap water,high-end water heaters,for smart water dispensers,water heaters,direct drinking machines,water purifiers,steam engines,energy-saving air conditioners,water,cooling equipment and tap water industries.