Product Details

I. Purpose and Features

To meet the needs of loading and unloading bolts in high, medium, and low pressure cylinders of steam turbines and improve work efficiency, our company has developed two series with over 10 varieties of bolt heating devices. The DJ22-23 low-pressure bolt heating device for steam turbines has been used by many power plants. This device is safe, reliable, easy to operate, has a long service life, and is well received by users. 

The DJ22-23 DC adjustable bolt heating control cabinet, used in conjunction with the DC bolt heater, has the advantages of stable and adjustable output DC voltage (0~220V adjustable), multiple output channels (up to 12 loads), high output power, safety, and reliability.

II. Usage Precautions

1. The control cabinet shell must be reliably grounded.

2. The phase and neutral wires between the bolt heater plug and the cabinet socket must be correctly connected; misconnection is strictly prohibited.

3. When installing or removing the bolt heater, the power switch must be turned off. For the DJ22-23 series control cabinet, the voltage adjustment and indication should be at the minimum position; the DJ22-23 low-voltage control cabinet must not be switched under load.

4. When connecting loads, pay attention to the balance between the three phases. 

5. If connectors are damaged, they must be replaced with identical ones.

6. Special bolt heaters need to be manufactured according to the specific geometric dimensions of the bolts. When ordering, please provide: a. bolt outer diameter; b. bolt outer diameter; c. total bolt length; d. nut length; e. the matching heating control cabinet situation.

III. Model Specifications and Parameters as per the table below:

Approved by the Ministry of Machinery and Electronics Industry of the People's Republic of China on 1988-07-20, implemented on 1989-07-01 

Note 1: The electric heater parameters listed in this table apply to bolts with a center hole diameter of d=22.6±0.2mm. For electric heaters that do not conform to the center hole diameter and specification parameters listed in this table, the user and manufacturer shall negotiate.