U Type SiC heating elements

U-Type silicon carbide heating elements are specially shaped SiC heating components manufactured from high-purity green silicon carbide through recrystallization sintering at over 2200℃. Characterized by parallel terminals forming a "U" shape, the hot zone is located at the bottom while the cold ends extend upward in parallel, allowing concentrated wiring from the furnace top.

This structural design makes them particularly suitable for deep furnace chambers, applications where sidewall installation is impractical, or scenarios requiring top wiring. They are widely used in industrial heat treatment, semiconductor diffusion, glass melting, and laboratory furnaces.

Technical Parameter

OD: Outer Diameter (mm)

HZ: Hot Zone Length (mm)

CZ: Cold Zone Length (mm)

OL: Overall Length (mm)

A: Shank Spacing(mm)

Resistance: Ω

For quotation or technical support, please provide:

·  Diameter

·  Hot zone length

·  Center distance

·  Cold end length (each side)

·  Resistance value

·  Operating temperature and atmosphere

·  Drawings or special requireme

Specifications 

Structural Feature of U-Type SiC Heating Elements

1. Parallel Terminal Design

Parallel upward terminals allow concentrated wiring from the furnace top, eliminating sidewall openings and simplifying furnace construction.

2. Concentrated Hot Zone

Heat is concentrated at the bottom, enabling precise heating of specific zones and improving thermal efficiency.

3. Uniform Diameter

Consistent diameter from cold ends to hot zone allows uniform openings for easy installation and replacement.

4. Adjustable Center Distance

The distance between legs can be customized based on furnace dimensions, flexibly matching various furnace types.

Key Advantages

☆ Space-saving: Vertical installation frees up sidewall space for higher furnace chamber utilization

 ☆ Clean wiring: All terminals concentrated at the furnace top for easy maintenance and enhanced safety

 ☆  Excellent temperature uniformity: Hot zone at the bottom promotes natural convection for uniform temperature distribution

 ☆ High thermal shock resistance: Special sintering process withstands rapid temperature changes, ideal for intermittent production

 ☆  Long service life: Low aging rate under proper conditions, with service life exceeding 2000 hours

 ☆  Flexible installation: Can be vertically suspended or bottom-supported to suit different furnace designs

Applications

Installation Methods

U-Type SiC heating elements can be installed in two primary ways:

1. Top Suspension

Elements are suspended from the top using clamps, with the hot zone hanging freely – 

suitable for most industrial furnaces.

2. Bottom Support

Elements are supported at the bottom by refractory materials, with the top free to expand – suitable for height-restricted furnaces.

 

2026-03-20

Operation Guidelines

· Furnace top openings should be 1.4-1.6 times the element diameter to allow thermal expansion

· Both legs must remain vertically parallel to avoid torsional stress

·  Clamps must make full contact with aluminum-sprayed cold ends and be tightened properly to prevent arcing

· When multiple elements are connected in parallel, resistance matching within 10% deviation is recommended

Customization Services

Why choose U-Type?

Applications

Equipment & Inspection

Note: Our silicon carbide heating elements undergo three rigorous quality inspections before being approved for shipment.

Packing&Transport

HHSIC Frequently Asked Questions 

1. What are your factory's strengths?

· Modern production lines – Automated equipment with strict process control

· ISO9001 certified – Quality management throughout every stage

· In-house R&D team – Continuous development of new materials and custom designs

2. How do you ensure product quality?

We implement rigorous quality control at every step:

· All incoming raw materials are inspected

· Sintering processes are monitored in real time

· Every element undergoes resistance testing, visual inspection, and dimensional verification

· Each batch is traceable with complete test records

3. Is there a minimum order quantity?

No. Most standard models have no MOQ – you can order just one piece. We encourage trial orders before moving to larger volumes.

4. What are your typical lead times?

· Standard products: 7-10 days

· Custom products: 15-30 days (depending on complexity)

Expedited processing is available for urgent requirements.

5. How do you handle shipping?

Shipping is arranged based on order size and customer location:

· Small quantities: Sent via DHL, FedEx, or UPS for fast delivery

· Large orders or complete furnaces: Shipped by sea or air freight, with the most cost-effective route confirmed in advance

6. Where do you export?

We ship to over 50 countries across Europe, the Americas, Southeast Asia, the Middle East, and Africa. Available trade terms include EXW, FOB, CIF, and DDP.

7. What is your warranty policy?

· Heating elements (consumables): If manufacturing defects (cracks, incorrect dimensions, abnormal resistance) are found within 30 days of receipt, contact us for replacement. Normal wear from use is not covered.

· Lifetime technical support is always available.

8. Do you provide technical support?

Yes. Our engineering team offers:

· Installation guidance and operation training

· Troubleshooting and maintenance recommendations

· Full technical documentation for OEM clients

9. Can I get samples?

Yes. Samples of selected models are available free of charge; you only pay the shipping cost. This is the best way to verify performance and compatibility before placing a bulk order.