Your Professional Positive Displacement System Supplier
Zhejiang Shengxiang Machinery Co., Ltd., a branch of Taiwan Yuxiang Precision Machinery Industry Co., Ltd. (ISHAN) in mainland China, was established in 2001. It is a high-tech enterprise specializing in the research, development and production of advanced centralized lubricating oil supply devices. The company has a complete range of products, including thin oil, dry oil, oil mist, oil gas, oil cooling and other types of lubricating devices.
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OEM & ODM Customization Services
We offer flexible OEM and ODM manufacturing services to meet diverse market demands. Whether you need customized designs, private labeling, or specialized technical solutions, we work closely with customers to deliver products that match their exact specifications.
Outstanding Team
Our experienced engineering team provides professional solutions tailored to different industries and operating environments.
Obtain Patent
Our products comply with international quality standards, including ISO 9001 and CE certifications. With continuous investment in research and development, we have obtained multiple patents and developed advanced lubrication technologies trusted by customers worldwide.
Best Solutions
The company actively develops and manufactures advanced products leading the future, and provides all-round mechanical lubrication solutions for different customer needs with better services.
Types of Pneumatic Positive Displacement Pump
Screw Pumps
Screw pumps have the highest flow rate out of all the positive displacement pumps. Therefore, they are commonly used in applications that require high-intensity viscous liquids such as oil production, fuel transfer and injection, and irrigation.
Plunger/Piston Pumps
These pumps use a piston or plunger to force a liquid through the pump. They can achieve extremely high pressures, making them a desirable option in many industries and applications. Plunger pumps are often used for the highest pressure operations, reaching as much as 10,000-30,000 psig.
Rotary Gear Pumps
Rotary gear pumps are used in various industries and services. They are made to pump clean fluids that are otherwise not suitable for centrifugal pumps. In addition, because they do not typically handle solids well, they require the viscosity of a liquid to lubricate the idler and driven gears to prevent premature wear from metal-to-metal contact.
Air Operated Double Diaphragm Pumps
Air operated double diaphragm (AODD) pumps are among the more versatile types of positive displacement pumps. They are shear sensitive, self-priming, and inherently explosion-proof. In addition, they require compressed gas to power the pump rather than an electrical motor.
Vane Pumps
A vane pump is a self-priming positive displacement pump that provides constant flow at varying pressures. A relief valve is built in to prevent the pump from building to a pressure that may cause vane wear. Their unique design allows them to be resistant to entrained solids.
Advantages of Pneumatic Positive Displacement Pump
Constant flow rate
Positive displacement pumps offer precise control over the volume of liquid displaced per cycle, even if the pressure changes.
Can handle fluids with high viscosity
Positive displacement pumps are popular in several industries because of their ability to handle thick, viscous fluids that are difficult to pump with centrifugal pumps.
Accurate Metering
These pumps are ideal for applications in chemical processing industries where precise and repeatable fluid dosing is a top requirement.
Application of Pneumatic Positive Displacement Pump
Usage in Chemical Processing Industries
In chemical processing industries, positive displacement pumps are extensively utilized for precise metering and dosing of various chemicals. These pumps play a vital role in safely handling abrasive or corrosive substances within industrial settings.
Importance in Oil and Gas Operations
Positive displacement pumps are crucial in the oil and gas industry, facilitating the transfer of crude oil and refined products efficiently. These pumps are instrumental in increasing pressure for oil extraction and transportation, serving both offshore drilling platforms and onshore refineries.
Applications in the Food and Beverage Industry
Applications in the food and beverage industry encompass a wide array of uses for positive displacement pumps. These pumps play a crucial role in transferring various liquids such as fruit juice and dairy products within production processes.
Stop flow of flush media and disconnect the thermocouple lead, ensuring it is clamped to the rotorcase.
Remove the rotorcase, rotors, and cover.
Carefully extract the stationary and rotary seal assemblies, O-rings, and any gasket or abutment spacer, taking care not to damage sensitive parts like the thermocouple wire.
Lightly grease new O-rings for rotary and stationary seals to ensure smooth fitting.
Place stationary seals into the rotorcase, ensuring proper orientation and thermocouple positioning.
Slide the rotary seal assembly onto the shaft until aligned with the marked setting length.
Secure rotary seals with grub screws, torque as specified, and tighten bush locking screws, ensuring the thermocouple lead is properly mounted.
Reassemble the pump components, connect thermocouple leads, and verify proper operation and seal function at startup.
FAQ
As one of the most professional positive displacement system manufacturers and suppliers in China, our products have good reputation in the market. Please feel free to buy high quality positive displacement system made in China here from our factory. For price consultation, contact us.
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