Description
The ZD/ZDG/ZDF/ZDY/ZMD series pump is horizontal multistage section
centrifugal pump, with the features of high efficiency', wide
performance range, steady and safety operation, low noise and easy
installation.
It can deliver the clean water, sewage water, corrosive liquid, hot
water, seal water and oil liquid by selecting different mater of
flow passage parts. It is widely applied to industrial water supply
and discharge, high building water supply, fire fighting
applications, mining water discharge, long distance water transmit,
and boiler water feeding, etc.
Construction
The multistage pump is consisted of stator, rotor, bearing, shaft
seal.
1. Stator: consisted of suction casing, discharge casing and
diffuser. The casing are held together by external tie rod.
2. Rotor: consist of shaft, impellers, balance disc and shaft
sleeve etc.
3. Bearing parts: consisted of bearing housing, bearing and bearing
cover. It's generally rolling bearing lubricated by grease.
4. Shaft seal: packing seal or mechanical seal.
5. Reverse circulation water pipe (external bypass water pipe): the ZD series self-balancing multistage ring section centrifugal
water pump is designed to remove the mechanical balance drum,
balance disc, balance socket and similar part, but achieve the
balancing function by reverse circulation water pipe. Such external
bypass piping is designed for water flowing into the end of the
pump from the suction side, and then reversely flow back to the
discharge section in the middle, which makes the water flowing from
both sides of the discharge section. It will balance the axial
thrust caused by the high pressure impeller from both sides and
escape the mechanical wears out as well as overloaded axial force
of the traditional multistage pump, and ensure the stability and
endurability of the pumpset.
Parameters
| Flow Capacity | 3.75-1,360 m3/h | Delivery Head | 20-1,110 m |
| Outlet Dia. | 40-300 mm | Working Pressure | ≤ 16.5 MPa |
| Liquid Temperature | 0 - 105 ℃ | Driven By | Electric Motor / Diesel Engine |
| Seal Type | Mechanical seal / Gland packing | Liquid | Clean water or similar |
| Material of Construction | Cast Iron / Cast Steel / S.S304 / S.S316 / Duplex S.S2205 |
Model Instruction
E.G.: ZD(ZDG,ZDF,ZDY,ZMD)46-50X4
ZD: Self-balancing multistage centrifugal pump for clean water
ZDG: Self-balancing multistage centrifugal pump for hot water
ZDF: Self-balancing multistage centrifugal pump for corrosive
liquid
ZDY: Self-balancing multistage centrifugal pump for petrolchemical
oil
ZMD: Self-balancing multistage centrifugal pump for sewage water
46: Rate flow capacity is 46m3/h
50: Rate head of 1 stage is 50m
4: Number of stage of the pump is 4.Main Parts Configuration
The pump could be applied to transfer different kinds of liquid by
customized wet parts, here followed our recommendation of main
configuration:
| Parts Name | Clean Water | Sewage | Hot Water | Corrosive Liquid | Oil Liquid |
| Pump Body | Cast Iron | Ductile Iron | Cast Steel/S.S304 | S.S304/S.S316/S.S2205 | S.S304/S.S316 |
| Shaft | Cast Iron | S.S420 | S.S420/42CrMo | S.S630 | S.S420/40Cr |
| Shaft Sleeve | Carbon Steel | S.S420 | S.S304 | S.S316/S.S630/S.S2205 | S.S304/S.S316 |
| Impeller | Cast Iron | Ductile Iron | Cast Steel/S.S304 | S.S304/S.S316/S.S2205 | S.S304/S.S316 |
| Wearing Ring | Cast Iron | Ductile Iron | Cast Steel/S.S304 | S.S304/S.S316/S.S2205 | S.S304/S.S316 |
| Bearing | China Make/NSK/SKF/Customized |
| Seals | Mechanical Seals/Gland Packing Seals |
