Stainless Steel Sanitary Butt Weld Double Diaphragm Pump

The working principle of the stainless steel sanitary double diaphragm pump relies on the alternating movement of two diaphragms to achieve fluid suction and discharge. First, the driving air source (such as compressed air or a motor) pushes the first diaphragm to move to one side, a negative pressure is formed in the pump chamber, the suction port check valve opens, and the fluid is sucked in. When the first diaphragm moves to the maximum stroke, the air source is switched, and the second diaphragm starts to work, pushing the first diaphragm to move in the opposite direction. With the reverse push of the second diaphragm, a positive pressure is generated in the pump chamber, the suction port check valve is closed, the discharge port check valve is opened, and the fluid is forced to be discharged. The two diaphragms work alternately to ensure continuous and stable fluid delivery.

The options of stainless steel sanitary double diaphragm pumps include:

Material: 304/316L stainless steel, Hastelloy, etc.

Diaphragm material: PTFE, Santoprene, EPDM, etc.

Interface type: clamp, thread, flange, etc.

Drive mode: pneumatic, electric.

Valve type: ball valve, flap valve.

Surface treatment: polishing, electrolytic polishing.

Additional functions: explosion-proof, high temperature resistant, CIP/SIP cleaning.

• The stainless steel sanitary double diaphragm pump adopts a dual-chamber structure, which automatically adjusts the internal pressure during the conveying process, reduces pulse fluctuations, and ensures flow stability.
• The stainless steel sanitary double diaphragm pump optimizes the flow channel through computational fluid dynamics (CFD), so that the fluid flows in the pump chamber with minimum resistance, reduces shear force, and ensures the integrity of sensitive materials.
• The micro-gap design between the valve ball and the valve seat of the stainless steel sanitary double diaphragm pump enables the valve ball to automatically adjust the sealing angle during operation, improve sealing performance, and reduce leakage.
• The stainless steel sanitary double diaphragm pump adopts a PTFE and EPDM composite diaphragm, the outer layer is corrosion-resistant, and the inner layer has enhanced elasticity. It can withstand high-frequency reciprocating motion, extend the life of the diaphragm, reduce the replacement frequency, and improve the long-term stability of the pump.
• The stainless steel sanitary double diaphragm pump adds a noise reduction buffer device in the pneumatic drive cavity, so that the compressed air forms a dispersed airflow when entering the pump body, reducing the airflow impact noise.
• When the internal pressure of the stainless steel sanitary double diaphragm pump increases abnormally, the built-in elastic pressure relief element will automatically release the excess pressure to prevent the pipeline or pump body from being damaged by overpressure.

Stainless steel sanitary double diaphragm pumps are widely used in the following industries: Food industry: conveying high-sanitary fluids such as juice, dairy products, and condiments. Pharmaceutical industry: conveying liquid medicines and raw materials to ensure sterility. Beverage industry: used for conveying sanitary fluids such as beer and carbonated beverages. Cosmetics industry: conveying high-cleanliness raw materials such as emulsions and essences. Chemical industry: handling corrosive media such as acid and alkali solutions. Bioengineering: conveying sterile fluids such as culture media and biological agents. Water treatment industry: used for conveying and filtering pure water and ultrapure water. Dairy industry: conveying perishable liquids such as milk and yogurt.