70 KVA Heat Treatment Equipment (PWHT Machine)

70 KVA Heat Treatment Equipment (PWHT Machine)

Product Code : PWHT-7003

70 kVA Heat Treatment Equipment

The traditional Low-Voltage Electrical Resistance method of Heat Treating using Ceramic Pad Heaters and Ceramic blankets controlled by step down transformers to provide a quick and convenient approach to many jobs, particularly preheat and PWHT. Most electrical resistance heat treating is performed either with the PWHT Tech 6-way control console.
PWHT TECH 70kVA Heat Treatment Modules include our unique ‘Advantage has been constructed to provide power to electrical resistance heaters. Suitable for onsite and shop working. The output from the unit is split into six individual heating circuits for temperature control. Each output circuit has 12.1 kW of power, which is sufficient capacity for four standard ceramic pads rated at 2.7 kW and connected in parallel. There are 3 operational methods of heat control; fully-integrated individual programmers, an external programmer for all channels, and individual proportional energy regulators. Sufficient for 4 ceramic heater pads per channel, this mobile unit is suitable for both site and fabrication shop use.
PWHT Tech Electrical Resistance Heat Treatment Machine advantages:
• Control and document welding preheat to reduce thermal stress.
• Improve the microstructure and durability of the heat-affected zone.
• Temper the metal and reduces tensile stresses, minimizing the risk of brittle fracture, stress and corrosion cracking and metal fatigue.
• Ensure the structural integrity of the vessel or unit during treatment.
• Get frozen lines flowing again quickly, and keeps them flowing until your plant’s steam tracing system is working again.
• Improve the integrity of welded components and minimize the risk of fabrication-related cracking.
• Decontaminate huge storage tanks that once held toxic agents.

• Three phase, forced air cooled, class H, 70kVA
• Primary winding connected in Delta
• Secondary winding connected in Star
• Auxiliary winding: 110V a.c. 3.3kVA single phase

• Primary voltage: 380V, 415V, 440V
• Primary current: 106A, 97A, 92A
• Frequency: 50/60 Hz

• Three-phase 125A circuit breaker with shunt trip
• Three primary core winding over temperature thermostats linked to circuit breaker shunt trip

• Output: 32.5V – 0V – 32.5V (for 30V and 60V heating element operation)
• Auxiliary outputs: Two 110V, 10A, 50/60Hz

output sockets
• Number of temperature controlled output channels:6 channels
• Maximum load per output channel: 10.8kW (e.g. four 60V, 2.7kW heating elements)
• Maximum current per output channel: 180A
Dimensions: 810L x 800 W x 840H mm
· Weight: 412kg

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