Assembled conventional graphite heater with visible screw-hole connections
Patented Graphite Heater Technology

Eliminating a common heater failure point.

The connection between heater elements is typically secured with multiple screws. A complete heater can contain up to 24 screw holes.

~92% of premature heater retirements are associated with cracking at screw-hole connection points

Field observation under customer operating conditions.

Why the connection fails

01

Screw Holes

Up to 24 openings create local stress concentration.

02

Thermal Cycling

Room temperature to ~1650°C, repeatedly.

03

Expansion Mismatch

More than 2× difference between heater and screw materials.

04

Surface Contact

Microscopic unevenness produces localized loading.

From conventional connection to ACX screwless design.

Conventional heater connection secured with screws

Conventional Design

Stress concentrates around the screw-hole connections during repeated thermal cycling.

ACX patented screwless heater connection design

ACX Patented Screwless Design

A bonded connection removes the drilled holes and eliminates the conventional screw-induced stress mechanism.

ACX Solution Patented screwless heater construction + in-house high-temperature graphite bonding technology
36S hot-zone cutaway, same furnace platform

36S Hot-Zone Cutaway — same furnace platform

Engineered Hot Zones — Measurable Customer Value

ACX hot-zone engineering increases usable charge volume and reduces operating energy without changing the furnace platform.

The chart below shows calculated annual gains across progressively engineered ACX hot-zone configurations.

+15.7 Metric Tons / Year — Additional Capacity
76,275 kWh / Year — Energy Reduction

Shown for the 38T Pro Max T8 configuration.

Annual capacity gain & energy reduction

ACX engineered hot zones — identical furnace.

Capacity Gain (kg/yr) Energy Reduction (kWh/yr)
90,000 80,000 70,000 60,000 50,000 40,000 30,000 20,000 10,000 0
5,365
39,555
7,916
50,625
8,911
59,535
10,121
69,525
13,218
57,375
13,934
64,125
15,721
76,275
36S
Standard
36S T12
36S Plus T12
36S Pro T10
36S Pro Max T8
38T Plus T12
38T Pro T10
38T Pro Max T8

Capacity gain and energy reduction by configuration, identical furnace platform. Source: ACX engineering data.