Industrial Gas Burners & Solenoid Valves for Manufacturing Plants [Stiefel]

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Normally open solenoid valve from Stiefel - Simple Flow Solutions for Low Pressure Systems

Aimed for uninterrupted flow in burners, kilns and boilers, Stiefel’s Normally Open (NO) solenoid valves remain open when de-energized. Offer low pressure drop (≤0.3 bar) and high flow capacity (Cv=20).
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Advantages of Stiefel’s Solenoid Valves

Reliable Fluid Control Using Precision Engineering

Stiefel's solenoid valves are of the utmost accuracy, including a leakage rate of ≤0.001 cc/min and a lifespan of over 10 million cycles. Our valves are made of 316 stainless steel and PTFE with a salt water (up to 100 bar) high pressure and extreme temperature durability (-40°C to 300°C). This makes them useful for industrial fuel systems, steam lines, and chemical processing. For instance, a German pharmaceutical plant's sterilization system over 5 years used our double-block valves without any leakage. Our valves use dual-seal design which incorporates a secondary safety mechanism. The tungsten carbide seats maintain tight seals even in high viscosity fuel applications, like waste oil burners, due to their resistance to coking and abrasion.

Related products

Stiefel (Guangdong) Energy Environmental Protection Engineering Co., Ltd. offers normally open solenoid valves that are designed to allow fluid flow by default until an electrical signal triggers closure, making them ideal for applications requiring fail-safe open functionality. These valves feature a robust construction with high-quality materials, ensuring resistance to corrosion, wear, and high temperatures for long-term reliability. The normally open design ensures continuous flow when the solenoid is de-energized, the solenoid coil, when activated, generates a magnetic force to close the valve quickly and precisely. Engineered for easy installation and maintenance, these valves provide consistent performance in systems such as fuel lines, water treatment, and industrial processes, where a default open state enhances operational safety and efficiency.

Frequently Asked Questions

What are the maximum pressures, temperatures and ranges Stiefel valves support?

For our standard valves, we cope within the range of bar from 0.1 up to 100, and -40°C to 300°C in temperature. The high-pressure versions up to 300 bar with Inconel bodies are used in oilfield fracturing systems, while cryogenic (-196°C) variants serve liquid gas storage. Our valves with low thermal conductivity and leak proof performance are crucial for a swiss medical facilities liquid oxygen lines.

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Customer Feedback

Thomas B.
Steam Systems Require Reliable Valves

For three years now, Stiefel’s solenoid valves have been a critical component of our hospital’s steam sterilization cycle. Their 316SS bodies stand up to the aggressive cleaning damage associated with hospital grade sterilization while the steam flow control ensured by the fast actuation <80ms is unparalleled. Thanks to the easy-to-replace modular components and robust screw design, we have seen a reduction in maintenance calls by 70%.

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Advanced Material Sciences

Advanced Material Sciences

Stiefel’s commitment to material innovation is evident in components such as silicon carbide (1,400°C resistant) coils and ultra low friction DLC diamond-like carbon coatings. These materials provide 50% reduced wear in high-cycle applications for paint booth valves in German automotive plants which have performed for over 5million cycles.
Predictive Maintenance With IoT

Predictive Maintenance With IoT

Additional to our smart valves, sensors measure and monitor performance metrics such as temperature of coil, speed and leakage rate of actuation. A Dutch dairy plant used this information to accurately forecast seal replacements resulting in a 35% decrease in unplanned downtime and 20% optimization of maintenance expenditure.
Certification and Compliance on A Global Scale

Certification and Compliance on A Global Scale

Our valves soar many industry standards with CE, ATEX, UL, CSA and FDA certicates. Exemplified by our medical-grade valves in US hospitals oxygen systems and industrial valves complying with machine directive EU 2006/42/EC in manufacturing facilities worldwide.