Sunrise can supply Positive displacement metering pump including Plunger metering pump, Diaphragm metering pump, Bellows metering pump and others. The Positive displacement metering pump also has various specs to fit different environments and applications. Positive displacement metering pumps of Sunrise are made of high quality carbon steel and alloy steel according to API Spec 675 standard.
The plunger metering pump directly sucks and discharges the working medium through the reciprocating motion of the plunger. Since both the plunger and the seal are in contact with the medium, selecting the appropriate plunger material and seal form can ensure that the pump has ideal performance during operation. Plunger metering pump is widely used in petrochemical industry because of its simple structure and high temperature and pressure resistance.
Sunrise Petro has rich experience in supply of Plunger metering pump.
The mechanical diaphragm metering pump is a special positive displacement pump that can meet the needs of various strict technological processes. The flow can be adjusted steplessly within 0-100%, and is used to transport liquids (especially corrosive liquids). Sunrise Petro has rich experience in supplying mechanical diaphragm metering pumps, and the products are exported to many countries in the world.
Hydraulic diaphragm metering pump, one kind of plunger diaphragm metering pump, is a metering pump designed by combining the characteristics of plunger metering pump and diaphragm metering pump. The contact part between the metering pump and the metered medium is a diaphragm, while the driving part is a hydraulic plunger. Sunrise Petro has rich experience in supply of Hydraulic diaphragm Metering pump.
The electromagnetic diaphragm metering pump is a metering pump driven by electromagnet and designed to deliver small flow and low pressure liquid. It is popular in the industry for its simple structure, easy control, low energy consumption, accurate metering, convenient adjustment and low price. Sunrise Petro can provide high-quality electromagnetic diaphragm metering pump to meet the demand of small metering flow.
The Standard Bellows Metering Pumps operate on a positive displacement principle. The rotation of the motor shaft is transmitted into an up and down motion through a lever pivot crank mechanism. This motion provides a continuous compression and expansion force on a bellows module, forcing fluid in and out of the module. The pneumatic diaphragm metering pump is a new product developed by Sunrise Petro in recent years and is used in various special occasions.
Pneumatic diaphragm pump is a new type of conveying machinery, which is the most novel pump in China at present. Compressed air is used as the power source to pump out all kinds of corrosive liquids, liquids with particles, high viscosity, volatile, flammable and highly toxic liquids. The pneumatic diaphragm metering pump is a new product developed by Sunrise Petro in recent years and is used in various special occasions.
Gear metering pump is a kind of gear pump. Only specific gear pump can be called gear metering pump. At the same time, the gear metering pump is one kind of metering pump, so gear metering pump has metering characteristics. In order to meet the market demand at home and abroad, Sunrise Petro has successfully developed a gear metering pump after years of research and development.
Sunrise Petro was founded in 1964 in Shengli Oilfield. From the beginning, our goal is excellent service, quality, integrity and innovation. Sunrise Petro unwavering commitment to quality extends beyond manufacturing to all aspects of business such as sales, service, support, planning and others. With inventory and field sales support in strategic location, we are ready to respond in a timely professional manner 24 hours a day. Our technical staff is ready to provide assistance in drilling pipe selection and design.
With its enterprising spirit and scientific and rigorous management,Sunrise Petro has become a reliable metering pump supplier in China, and won the trust of customers all over the world due to exquisite technology, excellent product quality and instant service.
The metering pump
The metering pump is a special positive displacement pump used to transport liquids. Now it has been widely used in petrochemical, oilfield, food and other industrial fields. It can meet the needs of strict processes. The flow can be adjusted within the range of 0-100%.
Due to the need of precise control and measurement, metering pumps are divided into multiple types and have multiple parameters. Therefore, users should pay more attention when selecting and using metering pumps.
Let’s take a deep look at the following precautions about metering pump. This will make you get twice the result but with half the effort.
Metering accuracy
Metering accuracy is the most basic parameter of metering pump, and users should pay attention to this before purchasing.
According to Chinese national standard GB/T 7782 Metering Pump, the flow metering accuracy of the pump under rated conditions and at the maximum relative stroke length shall not be less than ± 1%.The best range of the pump’s flow metering accuracy is more than 30%. When the application range required by the process flow is ≤ 10%, the stroke adjustment and frequency conversion parallel adjustment can be used to solve the problem.
Installation height (from pump head center to liquid level)
When selecting metering pumps, users should pay attention to the installation and operation conditions on the site.
Generally speaking, for normal temperature medium conveying physical properties similar to clean water, the installation height of plunger pump is ≤ 6m, the installation height of hydraulic diaphragm pump is ≤ 4.5m, and the installation height of mechanical diaphragm pump is ≤ 3m. For pumps with flow less than 50L/H, it is recommended that the process flow be arranged in reverse flow mode.
When comparing different models of metering pumps, the client should check out the flexibility, which means to alter the function of the metering pump to suit changing requirements. One of the major flexible parameters is flow regulation. The metering pump can accurately add liquid and strictly control the flow, so flow regulation is an important part of the flow pump.
Flow regulation usually adopts the following methods:
For oilfield production or other projects, the safety accident of metering pumps would delay production measurement or even cause other unnecessary troubles. Here shows some advice to avoid such problems.
Check the reliability of metering pump before purchase. All parts of the equipment shall be well assembled, intact and free from any signs of refurbishment, unless specifically required.
Check transmission medium temperature. For common metering pumps on the market, the medium tolerance temperature of plunger pump can reach – 50 ℃~350 ℃, while that of diaphragm pump is slightly narrow, about – 30 ℃~280 ℃.
Check the corrosion resistance of metering pump, especially for the medium-passing component. The corrosiveness and PH value of different measuring media is not the same. The better corrosion resistance a pump has, the more media a pump measures.
Ensure no leakage of the medium during operation. Diaphragm metering pump is recommended when measuring unconventional liquid. The hydraulic end and the power end are separated safely through the diaphragm to ensure zero leakage of the medium. It is suitable for conveying flammable, explosive, highly toxic, precious and other liquids. Clients can also choose double diaphragm metering pump with diaphragm rupture alarm device to further improve the level of prevention and ensure safety.
For metering pump pipeline system
The metering pump is often used together with the pipeline system. In order to ensure smooth operation, the following points should be noted.