Safety Performance Evaluation And Protective Measures Of Explosion-proof Screw Pumps in Explosive Environments

Nov 27, 2025

There are a large number of flammable and explosive gases or liquids in the fields of chemical engineering, petroleum, pharmaceuticals, etc. The use of explosion-proof pumps has gradually expanded to these industries. As one of the important explosion-proof pumps, the safety performance evaluation and protective measures of explosion-proof screw pumps used in explosive environments have attracted much attention. This article will provide a detailed introduction to the structural characteristics, safety performance evaluation, and protective measures of screw pumps.

Structural characteristics of screw pump

Screw pump is a type of positive displacement pump, mainly composed of twin-screw, synchronous shaft, and pump body. Its structure is simple and compact, and the rotor and stator can operate non-contact. Due to the continuous stability of the screw motion trajectory, the outlet pressure of the pump can be stably maintained unchanged, and the flow rate of the pump can be adjusted accordingly according to changes in motion parameters.

Security performance evaluation

 

Explosion proof screw pumps may be affected by various factors during use, such as ambient temperature, gas concentration, electrical parameters, etc. Therefore, the safety performance evaluation of explosion-proof screw pumps needs to be considered from different perspectives.

1. Static electricity

When using explosion-proof screw pumps, static electricity generated by the friction of the flowing medium can easily cause fires or explosions. Therefore, in the design and manufacturing process of explosion-proof screw pumps, it is necessary to treat their surfaces that are prone to static electricity to reduce the risk of static electricity accumulation.

2. Mechanical damage

Due to the reciprocating motion of the rotor and stator of the explosion-proof screw pump, a certain amount of heat is generated, and impact is generated during the motion, which can easily cause wear and leakage of the pump body. Therefore, it is necessary to conduct a visual inspection of the pump body before use to avoid leakage and environmental damage.
 

3. Electrical

If the electrical parameters used in the explosion-proof screw pump do not meet the requirements, it may cause electric sparks or arcs, increasing the risk of explosion. Therefore, it is necessary to inspect the electrical equipment before use to avoid electrical faults.
protective measures
In order to ensure the safe operation of explosion-proof screw pumps in explosive environments, some protective measures need to be taken.

1. Perform static grounding

By connecting the explosion-proof screw pump to the electrostatic grounding device, the danger of static electricity can be effectively reduced.

2. Choose appropriate mechanical seals

Mechanical seals can effectively reduce the leakage of the pump body and avoid the danger caused by mechanical damage.

3. Use explosion-proof electrical equipment

Choosing explosion-proof electrical equipment that meets the standards can effectively reduce the danger caused by electrical failures.

 

Explosion proof screw pumps have attracted much attention for their safe operation in explosive environments due to their special structure and function. By evaluating its safety performance and taking corresponding protective measures, safety hazards caused by careless operation or environmental changes can be minimized to the greatest extent possible.