ZF self priming pump is a kind of self-priming centrifugal pump of chemical industry of a new generation exclusively researched
and developed by our company. This equipment has been improved in structure so that it can prolong the working life of the
equipment effectively and obtain the national patent, while improving the performance of the products significantly. The emergence
of ZF self priming pump makes it one of the most competitive products on the market by its high cost performance, which is the
best alternative product replacing single-stage single-suction centrifugal pump, submerged pump and immersible pump. It is made
of RPP and PVDF.

The differences you should know

 1,Easy maintenance

The sealing cavity is fixed between pump body and pump
cover via location pin. (Easy to install)

The number of sealing faces is reduced from ordinary four or
three to one. (It is convenient to find out the leakage point)

The mechanical sealing is changed from built-in to built-out.
The impeller and pump spindle are injection molded as one.
(Less parts; easy to install) 

2,Long service life

The inlet and pump body of self-priming pump are one-step
injection molded. (The sealing faces are reduced; the leakage
points are reduced.)

The design of inserts that may contact the corrosive medium
is cancelled, and replaced by built-out bolts and nuts. (Avoiding
the equipment failure caused by the corrosive leaking medium)

The mechanical sealing is built-out. (The built-out mechanical
sealing has better corrosion resistancethan

3,Excellent performance

Limited by the testing conditions, the actual self-priming
height is 6.3 meters. Tested by equivalent method, the
theoretical height can reach 9.3 meters. (The self-priming
height of national standard is 5 meters.)

The valve is designed as one-way, letting water out at the

second start-up

4,Low maintenance cost

Sealing cavity: the sealing cavity won't cause friction on other
components, and thus no  wearing will take place.

Pump cover: the water storage characteristic of self-priming
pump determines that the pump cover won't break due to the
short-time friction during mechanical sealing (friction without
water).

Impeller and mechanical sealing: The use of integral impellers
and built-out mechanical sealing shall provide better corrosion
resistance and longer service life.

It is estimated that the maintenance cost of three ZF series
self-priming pumps equals to that of one ordinary self-priming

pump.