Pryma Water Pumps

Water pumps are used to provide continuous supply of water and to transport various forms of liquid. Firstank’s water pumps are divided into three kinds according to their use: domestic, civilian and industrial. A domestic pump is usually installed inside the house or in the courtyard with a shelter for daily domestic use. Civilian and industrial pumps are commonly installed in storied buildings, worksites, stores, workshops, and farms.

We design different pumps for different kinds of fluid, such as clean water, dirty water, water with fine sand, hot water, diesel oil, and hot oil. You may choose among the three kinds of pumps that we offer: peripheral pump, centrifugal pump, and jet pump. All of our water pumps are highly reliable, economical, and simple to use.

How to choose a pump?

Notes: This Guide only serves for general users to choose our production. Regularly, the advice from your design office or pump installing departments should be taken into your first consideration.

Before purchasing a pump, please think over the following points in advance, which will be enable you to know more about water pump and choose the most suitable one for you.

How many capacity and head do you need?

According to practical Capacity and Head requested, pick up the type of pump from the Performance Chart provided and it would be better to put the pumps optimal operating point among the running range of pumps. Optimal operating point of a pump is usually its rated point.

However, maybe there are some kinds of pumps satisfying both in the capacity and head on your need, in that case, please refer others points in this site before come to a final decision.

An example-hose may liters a minute do you need in your house.

The amount of water that some common home appliances typically use is indicated on the adjacent sketches. Please refer to the operating performance table to select the Elestar model to suit your needs.

For example, in the second flood about 3m above your pump, suppose that the most appliances likely to be operating at once is three-a tap (15L/min) plus washing machine (15L/min) – gives a total of 45L/min. Then check a pump which flow is 45L/min while its Head on 3m-5m, for example, J100S.

In what particular field your pump is used for?

Pumps for different use, they cost different materials and the price may be quite different, thought the performance and appearance of them are the same. We divided our pumps into three kinds use: domestic, civilian and industrial. Domestic pump is usually installed inside the house or in the courtyard with a shelter for domestic daily use. Usually the convey clean liquids and non-aggressive chemical fluids. And the pumps for civil use are installed in storied building, work-site, store, workshop, country or farm for distributing water irrigation,  cooling, fireproofing, etc.

Usually, pumps design only for domestic use, it would not be used for civilian and industrial use otherwise, it will may be worn out quickly or even be damaged some time. In the other hand, it is unnecessary to use a civilian or industrial pump for a domestic occasion.

What kind of fluid be transmitted?

We design different pumps for different fluid: clean water, dirty water, water with fine sand, hot water, diesel oil or hot oil. Make sure that your pump would be suitable for the transmitted fluid. Avoid using the clean water pump to deliver sewage because it will cause of blocked impeller and burning down the electric motor. Do not use a dirty water pump to deliver clean water prevent the decline of its efficiency and waste energy. Ordinarily, the ambient temperature should not over 40 C and the fluid temperature should not exceed over Max temperature. If you need pumps for higher temperature fluid. Please advise us. We will find a solution for you.

What kind of pump would you choose?

We have three kinds of pumps for you to select, peripheral pump, centrifugal pump and Jet pump. Suppose all kinds of pumps when at a same power: Peripheral pump would provide a higher Head but lower Capacity then centrifugal pump and JET pump. It can get higher Head in an economic way. Centrifugal pumps provide larger Capacity. It has higher efficiency then peripheral and Jet pumps. And it is a good choice for those pumps large expending in electrical power to save energy. And JET pump provide more reliable output.

About the suction head

Owning to the atmospheric pressure, for a certain fluid, there is a certain suction head. For example, for water, the maximum suction lift of an ordinary domestic pump is about 8m. Even when the suction pipe would be pumped to vacuum. It would be about 10M high suction head only. However,  choose a deep weell pump instead when a deeper suction-15m for example, is required. Because Deep Well pump consisted of two parts, JET pump and Centrifugal pump suction head. Take care to the NPSH (net positive suction head) when use industrial pump or civilian pump, to ensure the pump’s stable and continual operation. But for pumps domestic using, ussually we do not take NPSH into consideration.

Advise

The pump drive by electric motor is more preferential to consider. Usually some pumps cannot be operated for its entire head. Avoid operating the Centrifugal pump under the condition of low head out of their range, or it will make the pump over-loaded–the lower the head is, the bigger power is required. To the contrary, never operate the peripheral pump under the condition of high head out of their range; for it will make the pump over loaded –the higher the head is, the bigger power is required. So take care for the pump running within operating range. For Jet pump, its power changes little when change its head or capacity. SO it can be used for the whole Head.

Finally, please consider pumps efficiency, appearance and the price before come to your final decision.