explosion proof type electric actuator
DKJ-B explosion proof type electric actuator is a DDZ type electronic instrument combination which accepts output signals from the regulating unit and automatically completes regulating tasks. The actuator is mainly applied to power stations, chemical, petroleum, metallurgy, mine and other explosion proof places. The explosion proof electric actuator is designed and manufactured in accordance with national standards GB3836. 1-83 and GB3836.2-83 for explosion proof electric equipment, and examined and approved by the national explosion proof identification authority. Its explosion proof type is a explosion proof type. The explosion proof sign is dII BT3 directly used in Class II places where the following hazardous gases are contained, such as kerosene, gasoline, ethane, octane, etc. The internal structure of the explosion proof electric actuator is exactly the same as that of our current products, all of its position transmitter circuits use modular current transformers and imported conductive plastic potentiometers. The operation is safe and reliable. All the flame-proof type electric actuators produced by our company can be produced into the direct mounted type for direct connection with butterfly valves, ball valves, etc.
The explosion-proof level of FRY explosion-proof series electric actuator is: ExdⅡBT4Gb
Ex - Explosion proof identification
D - Explosion Proof or Explosion Proof
- Equipment type represents electrical equipment designed for explosive gas atmospheres other than coal mines
B - the size of the explosion, which determines the dimensions (width and clearance) of each fire joint of the actuator;
T4 - Temperature class represents the maximum allowable surface temperature of the actuator of 135°C
Gb - Protection class standard
Hazards of counterfeit explosion-proof products
Nowadays, there are many fine smartelectric actuators pseudo-explosion-
proof/explosion-proof products on the market, which are extremely harmful. Sparks, arcs or dangerous temperatures are generated in places containing flammable and explosive gases and dust such as coal, petroleum and chemical industry. , the flame of the explosion inside the equipment will be transmitted to the outside of the shell, and it will directly contact with the external flammable and explosive gas mixture, which will cause fire and gas or coal dust explosion and cause major vicious accidents. Therefore, this article teaches you how to distinguish the true and false explosion-proof electric actuators.
Classification of explosion-proof electrical equipment
Intrinsically safe electrical equipment:
Electrical equipment whose all circuits are intrinsically safe circuits is called intrinsically safe electrical equipment. The so-called intrinsically safe circuit refers to a circuit that cannot ignite an explosive mixture under specified conditions, under normal operation or under specified fault conditions, by generating sparks and thermal effects. The symbol of this type of equipment is "i" (divided into ia, ib).
Increased safety electrical equipment:
High-temperature electrical equipment that does not produce arcs, sparks, or the possibility of igniting explosive mixtures under normal operation, with measures taken in its construction to improve safety to avoid arcs, sparks, or the possibility of igniting explosive mixtures under normal or prescribed overload conditions The electrical equipment is called increased safety electrical equipment. This type of equipment is marked with an "e".
Explosion proof electrical equipment:
Electrical equipment with flameproof enclosures is called flameproof electrical equipment. The flameproof shell can not only withstand the explosion pressure generated by the detonation of the internal mixed gas, but also prevent the internal explosion flame and high temperature gas from breaking out of the flameproof gap to ignite the explosive mixture around the shell. This type of equipment is marked with a "d".
Explosion proof type Electric Actuator
Specifications and Models
All the following models of DKJ-B electronic quarter-turn electric actuator are represented in DKJ-B
Performance Parameter
1.The product has reasonable structure, strict production technology and quality management, so that thehigh reliability of the actuator is ensured, with Mean Time Between Failure (MBTF) >25000 hours. 2.The position transmitter switching circuit has high induced voltage resistance, and its performance exceeds those of similar products at home and abroad. 3.The AC single-phase motor is used in the actuator to bring convenience to the use of the automatic control system.4.With sel-locking of the reducer, a brake is not necessary for the motor, thus greatly reducing the failure frequency.
Dimensions
Product display
DKJ-B explosion proof type electric actuator is a DDZ type electronic instrument combination which accepts output signals from the regulating unit and automatically completes regulating tasks. The actuator is mainly applied to power stations, chemical, petroleum, metallurgy, mine and other explosion proof places. The explosion proof electric actuator is designed and manufactured in accordance with national standards GB3836. 1-83 and GB3836.2-83 for explosion proof electric equipment, and examined and approved by the national explosion proof identification authority.
DKJ-M electric actuator, an execution unit in DDZ type electronic unit combined instrument, accepts signals from a regulating unit (or computer) and automatically controls the actuator to complete regulating tasks. It is widely applied to power stations chemical, petroleum, metallurgy, building materials,heat supply, water treatment and other industries. DKJ type electric actuator with various electric Manipulators can achieve undisturbed switching of"Manual-Automatic of the regulating system for remote manual operation on an object to be regulated in a timely manner.
DKJ-Z electric actuator, an execution unit in DDZ type electronic unit combined instrument, accepts output signals from a regulating unit and automatically controls the actuator to complete regulating tasks. It is widely applied to power stations, chemical, petroleum, metallurgy, building materials,light industry and other industries. DKJ-Z electric actuator is directly connected with various butterfly valves, ball valves and other valves at the rotating angle of 9O for use. The direct mounted quarter-turn electric actuator is installed directly on the valve flange, so that the tedious work such as construction of a base configured linkage mechanism necessary for use of the ordinary quarter-turn electric actuator is avoided, which reduces the cost and improves the regulation precision
DKJ-D series electric actuator is an all-electronic new product successfully developed by our plant on the basis of the ordinary type DKJ electric actuator by absorbing foreign advanced technology and applying new foreign technology and new devices, and it has intelligent functions with integration of control circuit and the mechanism.
DKJ-D type electric actuator can directly accept DCS from a computer or 4-20mA or 1-5V from various regulating units,automatically control various dampers, valves, baffles and other regulating mechanisms without additional configuration of servo amplifier, and it can be widely applied to power stations, metallurgy, petroleum,chemical and other industries.
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