Immersion heater with a quartz glass, PTFE or titanium sheath instead of metal, used in acid, alkaline and galvanising baths.
Also known as: Acid bath heater · Quartz immersion heater · PTFE immersion heater · Titanium immersion heater
You can upload your technical drawing via the quote form.
General Information
Acid bath heaters are produced for corrosive environments that stainless steel cannot withstand. In galvanising, anodising, pickling and chemical treatment baths, the liquid contains hydrochloric, sulphuric or nitric acid, and a standard immersion heater is perforated within weeks.
The solution is to enclose the heating element in a chemically resistant sheath. A quartz glass sheath offers the broadest resistance to most acids and, being transparent, allows the condition of the element inside to be checked visually; its only drawback is fragility. PTFE coating is more impact-resistant but cannot be used above 200 °C. A titanium sheath is the most mechanically robust option and is preferred particularly in chloride environments.
In this product group the watt density is kept low. Because the air gap between the sheath and the element slows heat conduction, exceeding 3 W/cm² causes the inner element to overheat. Continuous monitoring of the bath liquid level and the use of level-protected control are mandatory.
Applications
- Galvanising baths
- Anodising lines
- Pickling
- Chemical treatment tanks
- Surface coating
Related Industries
Frequently Asked Questions
Tell us the type and concentration of the chemical in the bath and the operating temperature. General rule: quartz for broad acid resistance and visual inspection, PTFE where there is a risk of mechanical impact, and titanium in chloride environments with high mechanical loads.
The inner element comes into direct contact with the chemical and is damaged within a short time. Using a residual current device against sheath damage and carrying out periodic visual checks is recommended.
Related Guides
Related Products
Let us define the right solution for your project together
Contact us to determine the most suitable heater and industrial heating solution for your project. Our technical team is ready to offer the solution that best fits your requirements.