I. Product Description
The bolt heater is mainly composed of high-resistance alloy heating elements and stainless steel protective sleeves. It is specially used for heating hollow bolts of steam turbines and other large machinery during installation and removal. When in use, insert the heater (rod) into the bolt hole, and the bolt expands due to heating, making it easy to remove and tighten the nut. It features fast heating and convenient operation.
II. Technical Parameters
1) Working Voltage: AC220V/380V
2) Power Density: 8-11W/cm2
3) Rated Power: Customized according to dimensions, or refer to standard "UDC ZB K54 019-88"
4) Outline Structure:

L1: Heating Length
L2: Cold End Length
D: Heater Rod Diameter
The total length of the handle and socket is 146mm. The matching plug for the heater rod is P28J2Q, which is not included in the standard configuration.
The optional P28J2Q plug and lead wires are shown in the figure below:


