Importance of high-quality sealing and anti-corrosion design in Custom Plastic Emulsion Pump

1. Importance of sealing design
The sealing system is a crucial part of the emulsion pump, which directly affects the efficiency and safety of the pump. Emulsion pumps are often used to transport liquids containing chemical components. If the sealing design is improper, leakage may occur, leading to equipment failure, liquid leakage or environmental pollution. Designing an efficient and reliable sealing system is essential for the function of the emulsion pump.

1.1 Choose the right sealing material
Different emulsion pump application environments will have different requirements. The selection of sealing materials must be customized according to many factors such as the type of liquid, working temperature, pressure and working environment of the pump. Common sealing materials are:
Rubber sealing rings (such as fluororubber, silicone, etc.): suitable for most chemical liquids and low temperature environments. Fluororubber (FPM) usually has excellent corrosion resistance and is suitable for liquid transportation of harsh media such as strong acids and alkalis.
Polytetrafluoroethylene (PTFE): has excellent high temperature and corrosion resistance, suitable for high temperature and chemically corrosive media. PTFE sealing rings can work effectively in a wide pH range to ensure the sealing effect of the pump body.
Metal ring seal: For applications with high pressure, high temperature or high wear requirements, metal seals (such as stainless steel seals) are more durable. They can withstand extreme working environments, especially when dealing with high viscosity or particulate-containing liquids, and can effectively prevent leakage.

1.2 Design of sealing structure
In addition to material selection, the design of the sealing structure is also very important. Common sealing methods are:
O-ring seal: O-ring is a simple and effective sealing method, which is widely used in many parts of lotion pumps, such as the contact surface between the pump body and the pump cover, between the pump shaft and the pump body, etc. O-ring seal has high sealing performance and can effectively prevent liquid leakage. By reasonably selecting the material and size of the O-ring, the sealing effect can be further improved to ensure the stable operation of the lotion pump.
Mechanical seal: For high-pressure, heavy-load or long-term operation of lotion pumps, mechanical sealing systems can provide higher sealing performance. Mechanical seals form a seal through the relative movement between the shaft and the sealing ring, which can effectively reduce friction, reduce the risk of leakage, and maintain a stable sealing effect when the pump body is running at high speed.
Combination of static seal and dynamic seal: In some high-demand occasions, static seal and dynamic seal may be used in combination. The sealing part of the pump shaft usually requires the use of static seals such as O-rings, while the sealing part between the rotor and the pump housing requires the use of mechanical seals to adapt to the environment of high pressure and high-speed rotation.

2. The importance of anti-corrosion design
The anti-corrosion design of the emulsion pump is mainly aimed at protecting the pump body and its internal components to prevent the pump from being affected by corrosive media, thereby extending its service life and reducing maintenance costs. Emulsion pumps usually handle corrosive liquids, especially in the chemical, food, and pharmaceutical industries. The liquid composition is complex and may cause serious corrosion to metal materials. Anti-corrosion design can not only ensure the long-term operation of the pump, but also avoid equipment failure and environmental pollution caused by corrosion.

2.1 Material selection
The first step in anti-corrosion design is to select corrosion-resistant materials. The anti-corrosion materials commonly used in plastic emulsion pumps are:
Corrosion-resistant plastics: such as polypropylene (PP), polyethylene (PE) and fluoroplastics (such as PTFE, FEP, etc.). These materials have good corrosion resistance and chemical resistance, and can effectively resist corrosion from various acid and alkali solutions, salt solutions and organic solvents.
Coating and plating: For metal components, anti-corrosion coatings (such as epoxy resin coatings, polyurethane coatings, etc.) and metal plating (such as zinc plating, chrome plating) can greatly improve their corrosion resistance. The coating can form a protective film on the metal surface, effectively preventing chemical liquids from contacting the metal, thereby extending the service life of the equipment.
Stainless steel: For emulsion pumps that need to handle high temperature, highly corrosive or heavy-load liquids, stainless steel (such as 304, 316L) is often used as the main material. It has good corrosion resistance and strength, and can effectively prevent liquids from corroding the pump body.

2.2 Surface treatment
Surface treatment is an important part of anti-corrosion design, especially for metal pump bodies. Common anti-corrosion surface treatment technologies include:
Spraying anti-corrosion layer: By spraying anti-corrosion coatings on the surface of Custom Plastic Emulsion Pump, it can effectively prevent liquids from contacting metals and prevent corrosion. Common anti-corrosion coating materials include epoxy resin coatings, polyurethane coatings, fluorocarbon coatings, etc., which have excellent chemical corrosion resistance.
Electroplating and hot-dip plating: Through electroplating or hot-dip plating technology, a dense protective film is formed on the metal surface, such as zinc plating, chrome plating, etc., to improve its corrosion resistance. It is especially suitable for lotion pumps in high-load and high-pressure application environments.

2.3 Integration of sealing and anti-corrosion systems
The sealing and anti-corrosion design need to be organically combined to ensure that the pump body is not corroded while sealing. Usually, the pump shaft sealing part needs to adopt a special anti-corrosion design. The pump shaft made of fluoroplastic or stainless steel is combined with seals made of corrosion-resistant materials such as PTFE and fluororubber to ensure that the lotion pump will not leak or degrade due to corrosion during long-term use.

3. Comprehensive design and long-term maintenance
High-quality sealing and anti-corrosion design is not only a consideration in the manufacturing process, but also needs to be continuously paid attention to during the later maintenance and use process. To this end, pump manufacturers should provide detailed maintenance plans and technical support to help customers regularly check the wear of seals, replace sealing parts in time, and regularly maintain the anti-corrosion coating of the pump body to ensure the stability and durability of the equipment in long-term operation.