380V 20kw 30kw 40kw 50kw Industrial Heater Brass Flange Liquid Immersion Heater

Product Description

Screw Plug Immersion heater

Screw Plug Immersion Heaters are screwed directly through a threaded opening in a tank wall or through a matching pipe coupling or half coupling. Sizes of screw plug heaters are available with 1", 1-1/4", 1-1/2", 2", 2-1/2" pipe threads. A wide selection of screw plug sizes, kilowatt ratings, voltages, sheath materials, terminal enclosures and thermostats makes these compact heaters ideal for all types of applications.

Specification

Applications

Screw Plug Immersion Heaters are used for heating liquids in a variety of processes. These heaters are ideal for process water heating and freeze protection. All types of liquid heat transfer solutions can also be heated using these compact, easily controlled units. The direct immersion method is energy efficient and well suited for many applications.

• Hot Water Storage Tanks

• Warming Equipment 

• Preheating all Grades of Oil

• Food Processing Equipment

• Cleaning and Rinsing Tanks

• Heat Transfer Systems

• Process Air Equipment

• Boiler Equipment

• Freeze Protection of Any Fluid

The goal is to optimize the heater configuration to ensure the longest life possible, while minimizing overall product and life cycle costs. The general temperature, sheath material and watt density guidelines below can aid in proper heater selection for some common liquids. Contact us for further assistance.

Liquid	Max. Operating Temps °F (°C)	pH Level and/or Concentration	Recommended Sheath Material	Typical Plug Material	Max. Watt Density W/in2(W/cm2)
Clean, Potable Water	212 (100)	Neutral (pH 6 to 8)	Copper/304SS	Brass/304SS	60-90 (9.5-14)
Process Water & Weak Solution	212 (100)	pH 5 to 9; 2-3%	Incoloy®, 304SS	Steel or 304SS	48 (7.5)
Demineralized, Deionized Water	212 (100)	Neutral	304SS or 316SS (passivated)	304SS or 316SS	60 (9.5)
Weak (Acidic) Solutions*	210 (100)	Up to 5-6%	Incoloy®, 316SS	Steel	48 (7.5)
Mildly Corrosive (Acidic) Solutions*	180 (80)	5-15%	Incoloy®, 316SS	304SS or 316SS	20-30 (3.5)
Severely Corrosive (Acidic) Solutions*	180 (80)	>15%	Incoloy®, titanium, and PTFE type	304SS or other	15-16 (2.5)
Caustic Soda 10%	200 (100)	pH 14; 10%	Incoloy®	Steel	20-23 (3.5)
Caustic Soda 50%	250 (120)	pH 14; 50%	Incoloy®	Steel	16 (2.5)
Fuel Oil 1 & 2; Kerosene Lube Oil SAE 10 to 30	200-250 (95-120)	-	Steel	Steel	20-23 (3.5)
Fuel Oil 4 & 5; Lube Oil SAE 40 to 50	200-250 (95-120)	-	Steel	Steel	15-16 (2.5)
Fuel Oil 6 & Bunker C	160 (70)	-	Steel	Steel	6-8 (1.2)
Hydraulic Oil	100 (40)	-	Steel	Steel	15-16 (2.5)
Ethlyene Glycol	300 (150)	-	Steel	Steel	23-30 (3.5-4.5)
Glycerine	500 (260)	-	Incoloy®	Steel	8-10 (1.5)
Molton Salt Bath	800 (425)	-	Steel, 321SS,	Steel	23-30 (3.5-4.5)
Paraffin Wax	150 (65)	-	Steel or 304SS	Steel	15-16 (2.5)
Molasses	100 (40)	-	304SS or 316SS	304SS	4-5 (0.7)

How to Order?

To place an order, or get a quotation, please provide the information itemized below. Contact Hongtai factory for further assistance.

· Electrical Rating:Voltage, phase, Wattage

· Screw Plug Size and Material:1", 1 ¼", 1 ½", 2", 2 ½" NPT or other size and standard; brass, steel, 304SS or 316SS

· Element Sheath Material:Copper, Steel, 304SS, 316SS, Incoloy® or other

· Element Diameter and Quantity:Provide element diameter and quantity (one, two or three).

· Element Watt Density:8, 16, 23, 48 or 60 W/in2, or other watt density value

· Immersion Length:Provide desired immersion length or maximum length allowable.

Also our engineer can help you to design the heaters, contact Hongtai for details.

After Sales Service

Guarantees & Commitments

 
Package Tracking

Real-time order tracking services via global logistics platforms, enabling customers to monitor shipment status from dispatch to delivery.

One-Year Warranty

Comprehensive 12-month warranty covering manufacturing defects. Warranty valid from the date of product receipt.

Technical Support

Dedicated technical assistance provided by industry experts, including pre-sales consultation, installation guidance, and post-sales troubleshooting.
Training: On-site or remote operation/maintenance training.

 24/7 Working Service

Responsive customer service available for 24/7 technical assistance and spare parts supply.

Reorder Discount

Exclusive volume discounts for repeat orders, tailored to customer purchasing history and order quantity.

Quality-Related Replacements

Free replacements for products found defective due to quality issues within the warranty period, including return logistics coordination.

Customer Information Confidentiality

Strict adherence to data privacy regulations, ensuring all customer information and business details are kept confidential and non-disclosed.

Company Profile

Hongtai Heater factory: A 25-Year Professional Manufacturer of Electrical Heating Elements

With nearly 25 years of expertise in manufacturing electrical heating elements, Hongtai Heater Factory is a scale-oriented enterprise integrating design, production, and testing. Covering an area of over 5,000 square meters and employing 137 staff members, the factory has established a strong reputation through mature production processes and strict quality management systems. Certified by ISO 9001, CQC, CE, ROHS, UL, and other international standards, our products serve industrial heating markets worldwide.

Technology and production strength

 
6 Production Workshops
Covering the entire process of wire winding, casing, welding, assembly, testing, and packaging, enabling integrated manufacturing from raw materials to finished products.
12 Precision Equipment
Including CNC wire winding machines, hydraulic compactors, high-temperature aging test furnaces, insulation resistance testers, etc., ensuring component precision and reliability.
Rigorous Testing System
Each batch of products must pass:
1.High-voltage test (1500V/1min)
2.Insulation resistance test (≥100MΩ)
3.Thermal distribution test
4.Life aging test (continuous operation ≥5,000 hours)
 
Certification and Compliance Advantages
1.Quality Management System Certification
ISO 9001 quality management system ensures standardized production throughout the process.
2.Safety and Environmental Certifications
1.CE and UL certifications ensure products comply with European and American electrical safety standards.
2.ROHS certification guarantees the absence of hazardous substances like lead and halogens, suitable for markets with high environmental requirements (e.g., EU, Japan).
3.CQC certification meets the needs of domestic industrial equipment and home appliance supporting facilities.
 
Market and Service Capabilities
i.Customization Services
Support the development of non-standard products based on drawings or samples, offering customization in:
1.Materials (stainless steel/Incoloy, etc.)
2.Dimensions (diameter 3-25mm, length 25-2000mm)
3.Installation methods (threaded/flange/clamp, etc.)
ii.Global Delivery
1.Lead time: 3-7 days for samples; 5-25 days for batch goods.
2.Support trade terms including FOB, CIF, DDP, etc.

Certifications

Core Product

Product Type	Features and Applications
	Made of stainless steel/copper/nickel-based alloys, supporting customized U-shaped or spiral structures. Suitable for heating plastic machinery, chemical reactors, and food baking equipment, with thermal efficiency ≥90%.
	High watt density design (≤35W/cm²), filled with magnesium oxide insulation, resistant to temperatures over 600°C. Widely used for precise heating in injection molds, die-casting nozzles, and semiconductor equipment.
	Finned structure increases heat dissipation area by 30%, ideal for air heating, pipeline anti-freezing, and rapid heating of large equipment. Materials (available in) stainless steel 304/316L or aluminum.
	Flange-mounted design for direct immersion in liquids (water, oil, acid-base solutions), commonly used in chemical storage tanks, boilers, and water treatment equipment. Explosion-proof types (ATEX certified) available for customization.
	Quartz/ceramic infrared radiation heating with ≤3-second warm-up time, suitable for film drying, printing ink curing, and medical equipment surface sterilization. Wavelength range customizable (2-15μm).
	Flexible silicone rubber/mica band wrapped around resistance wires, adaptable for winding on pipes and mold curves. Used in hot runner systems, cable anti-freezing, and laboratory equipment thermostats, with temperature resistance from -50°C to +200°C.
	Designed for injection molding hot runner systems, using nickel-chromium alloy wires and stainless steel casings. Compatible with mainstream hot runner brands, achieving ±1°C precision temperature control with thermostats.
	Provides K-type/J-type thermocouples, PT100 resistance thermometers, etc., supporting integration with heating elements for real-time temperature monitoring and closed-loop control, with accuracy up to ±0.5°C.

FAQ

Q1 : Why choose us ?

A: Our product has low MOQ , high quality which meets standard . We provide high level service and trade assurance order.
 
Q2: Can you supply customize service?
A: Yes, we can supply OEM & ODM service according to your drawings or requirement.
 
Q3: How long can i get the order?
 A: The delivery time depends on order quantity.Normally can be ready within 7-15 working days.
 
Q4. How can you guarantee quality?
 A: We strictly follow the agreed product parameters and material performancenn.Before delivery, we will take photos and ask you to verify the product information. If you have any other questions,please feel free to contact us.