Duraline Preheat Welding Systems for Shipbuilding and Stick Welding

Duraline Distribution Systems for Welding

Preheat, Heat Treating Systems

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Heater Sizes

The modular nature of Duraline's distribution systems for electrical resistance heat treating applications provides the maximum in flexibility of choice and economy in use.

While some assemblies can be combined or intermixed to create new systems, certain parameters must be observed to ensure that a functionally safe, economical, and efficient system is obtained:

1. The U.S. Navy 3 and 4 wire system configurations are not variable from

the Bureau of Ships standard;

2. Commercial percentage timer systems may be specified with differing

output receptacles and power streamer plugs for multiple applications

or dedicated system at one site.

3. The Factory Mutual thermostatically controlled system is completely

FM approved. Input cables may be furnished up to 100 feet long on the

6-outlet distribution block, and up to 50 feet long on the 4-outlet main

panel. The optional panel mount receptacle, model 30FR4X, intended

for main power input, is the latest addition to the system and provides

additional flexibility and convenience for the system end user.

4. Both the CBI and JBB type commercial systems add the capability of

using 72 inch thermostatically controlled heaters by incorporation a

primary spider in place of the 3B20-6SR FM distribution block.

Accordingly, the system may be configured using either the primary

spider or the 6 outlet distribution block. The primary spider must be

used if 72 inch heaters will be used in the system.

5. Primary spiders (3 phase to single phase) must have 3 legs for phase

balance. Secondary spiders (single phase) can have 2 or 3 legs. Length

of cable can be up to 100 feet. per spider (overall length)

U.S Navy 3 Wire System with Percentage Timer

Water Tight For All Around Safety

All Components including the control unit, are watertight, with waterproof and shielded connections. Distribution blocks are neoprene rubber with mating plugs molded to 600 volt heavy duty cables. Plugs of the distribution assemblies are fused and so constructed that they must be disengaged in order to change fuses. Terminals of the equipment-grounded circuits "make" automatically before voltage is applied and "break" after voltage is removed.

U.S Navy 4 Wire System with Percentage Timer

Water Tight For All Around Safety

Commercial Percentage System (Mini System for Preheat)

The Duraline Mini-System is a line voltage resistance heating system. Its main applications are for preheating plates, spheres, vessels and other weldments having a fairly regular shape or a radius greater then on foot. Most importantly, it is a system designed specifically for preheating with all cables sized to take maximum advantage of their current carrying capabilities.

Thermostatically Controlled Factory Mutual (FM) System

The Duraline Smart Heater is the first electrical resistance heater with independent thermostatic control. It cuts your energy cost and man hours by monitoring and controlling the temperature at each weldment automatically. Independent lab test prove the Smart Heater will save you more than 30% in energy cost alone.

Commercial System "A" (CBI) Thermostatically Controlled Factory Mutual (FM) System

Commercial System "B" (JBB) Thermostatically Controlled Factory Mutual (FM) System