Product Description
Model Meaning
Product Introduction
PW horizontal cantilever centrifugal sewage pump is a single-stage, single-suction, cantilever-type centrifugal sewage pump. The suction inlet is arranged axially in the horizontal direction, and the discharge outlet can be installed either horizontally or vertically as required. The pump mainly consists of the pump cover, casing, impeller, shaft seal, shaft and bearing bracket.
The shaft seal adopts an advanced double-end mechanical seal structure. The pump and motor are mounted on a common baseplate and driven directly by the motor through a flexible coupling. This sewage pump offers high efficiency, significant energy savings, smooth running, reliable performance and easy maintenance. All designs are carried out and optimized by computer. With strong technical capability, rich manufacturing experience and complete testing facilities, the company ensures stable and reliable product quality.
The PWF stainless steel corrosion-resistant sewage pump is suitable for conveying sewage containing acidic, alkaline or other corrosive media at temperatures below 80°C. It is widely used in chemical, petroleum, light industry, food, pharmaceutical and environmental protection industries.
Our newly developed PW sewage pump series adopts a high-efficiency hydraulic model and wear-resistant double-end mechanical seal, featuring high efficiency, compact and modern structure, stable and reliable operation, low noise, small size, attractive appearance, and convenient operation and maintenance.
The performance range of this series: flow rate Q = 10–125 m³/h, head H = 10–18 m.
Our factory is a professional manufacturer of pumps for petrochemical applications, equipped with complete production and testing facilities and strong technical strength. “Excellent quality and good reputation” is our business philosophy. We warmly welcome customers from all sectors to choose Haiyang pump products. For any special requirements, we will do our utmost to meet them and provide superior service.
Selection Guidelines
Motor power is selected on the basis of a medium specific gravity of 1.3. If explosion-proof or special motors are required, or if the medium specific gravity is greater than 1.3, please specify when placing the order.
The wetted components of the pump can be supplied either in stainless steel or in high-strength cast iron, according to customer requirements.
Construction Description
This pump mainly consists of: pump cover (1), pump casing (2), impeller (3), shaft (15), shaft seal housing (4), bearing housing (11) and coupling components, etc. (see Fig. 1: construction drawing).
The discharge outlet is vertically upward as standard, and can also be arranged horizontally if required. The pump is driven directly through a flexible coupling (a belt drive can also be supplied on request).
The impeller has only two curved blades, providing a wide flow passage that allows common suspended particles to pass.
Four auxiliary blades are arranged on the back of the impeller to balance axial thrust, and each impeller is statically balanced during manufacture.
Viewed from the drive end, the pump rotates clockwise.
The bearings in the bearing housing are lubricated with thin oil. The oil level is indicated by an oil gauge and must be kept at the normal level mark.
The shaft seal adopts an oil-seal ring sealing arrangement, which provides reliable sealing performance and easy replacement.
The seal ring is made of cast iron and fixed to the pump cover. After wear, it can be replaced by spare parts.
The clearance f between the pump cover and the impeller inlet, the assembly clearance T between the seal ring and the impeller (see construction drawing), and the inner diameter of the matching foot valve are listed in Table 1.
Assembly and Disassembly
Check all parts and components for any defects that may affect assembly, and clean them thoroughly before assembly.
1. Prepare paper gaskets, plugs and pipe plugs, and install them on their corresponding parts.
2. Fit the seal ring, shaft seal box, oil indicator and oil-port cover, and felt rings into the pump cover, bearing body, bearing housing and bearing cover, respectively.
3. Install the bearings on both ends of the shaft, then place the shaft and bearings into the bearing housing, and mount the bearing gland.
4. In sequence, install the bearing body, bearing (not used on model 4PW), oil seal ring and washer, impeller, spacer and impeller nut, tightening them securely, then fit the pump casing and pump cover.
Disassembly must be carried out in the reverse order of assembly.
Structure Diagram
|
No.
|
Name
|
No.
|
Name
|
|
1
|
Pump Cover
|
10
|
Oil Indicator
|
|
2
|
Pump Body
|
11
|
Bearing Housing
|
|
3
|
Impeller
|
12
|
Bearing Cover
|
|
4
|
Seal Body
|
13
|
Flat Key
|
|
5
|
Seal Box
|
14
|
Elastic Ring
|
|
6
|
Washer
|
15
|
Shaft
|
|
7
|
Shaft Sleeve (Not used in 4PW)
|
16
|
Nut
|
|
8
|
Oil Seal
|
17
|
Gasket
|
|
9
|
Bearing
|
18
|
Seal Ring
|
Performance Parameters
|
Item No.
|
Model
|
Flow Rate (m³/h)
|
Head (m)
|
Speed (rpm)
|
Power (kW)
|
||
|
m3/h
|
L/s
|
m
|
r/min
|
Shaft Power
|
Power (kW)
|
||
|
1
|
50PW-65
50PWF-65 |
14.5
|
4
|
16
|
1440
|
2.47
|
4
|
|
2
|
50PW-65
50PWF-65 |
25
|
6.94
|
32
|
2900
|
3.35
|
4
|
|
3
|
80PW-100
80PWF-100 |
56
|
15.5
|
13.5
|
1440
|
4.1
|
5.5
|
|
4
|
80PW-100
80PWF-100 |
90
|
25
|
26
|
2900
|
7
|
11
|
|
5
|
100PW-125
100PWF-125 |
100
|
27.8
|
12.5
|
1440
|
5.7
|
7.5
|
|
6
|
21/2PW
|
60
|
16.6
|
9.5
|
1440
|
2.5
|
4
|
|
7
|
21/2PW
|
90
|
25
|
26
|
2920
|
11
|
15
|
|
8
|
21/2PW
|
90
|
25
|
43
|
2940
|
17
|
22
|
|
9
|
4PW
|
100
|
27.8
|
11
|
960
|
4.7
|
7.5
|
|
10
|
4PW
|
160
|
44.4
|
25.5
|
1460
|
18
|
30
|
|
11
|
6PW
|
300
|
83.3
|
14
|
980
|
17
|
30
|
|
12
|
6PW
|
350
|
97
|
27
|
1450
|
42
|
55
|
|
13
|
8PW
|
500
|
139
|
13
|
730
|
29
|
45
|
|
14
|
8PW
|
550
|
153
|
25
|
980
|
59.5
|
75
|
|
15
|
10PW
|
800
|
222
|
13.5
|
730
|
40.2
|
75
|
|
16
|
10PW
|
1000
|
278
|
25
|
980
|
92
|
132
|
OEM & Custom Solutions
OEM/ODM available: stainless vs. cast-iron wetted parts, special mechanical seals, explosion-proof motors, baseplate & coupling options, custom discharge orientation, paint & packaging for export. Share medium, SG, temperature, flow/head, voltage/frequency, and piping to receive a tailored selection and quotation.
FAQs for Oversea Buyers
- Q: What’s the difference between PW and PWF?
A: PW is standard cast-iron sewage service; PWF uses stainless steel for acidic/alkaline or corrosive wastewater up to 80 °C. - Q: Can the discharge be vertical or horizontal?
A: Yes. The outlet can be oriented vertically or horizontally to suit site piping. - Q: What seal type is used?
A: A double-face mechanical seal with auxiliary oil seal structure for reliable sealing and easy replacement. - Q: How do you align the unit during installation?
A: Level the base, grout anchors, and align couplings with TIR ≤ 0.1 mm and end-gap deviation ≤ 0.3 mm. - Q: Which industries commonly use PWF?
A: Chemical, petroleum, food, pharmaceutical, and environmental plants handling corrosive wastewater. - Q: Do you provide explosion-proof motors and special voltages?
A: Yes. Explosion-proof and special motors/voltages are available upon request. - Q: What information is needed for quotation?
A: Medium type, SG, temperature, viscosity, required flow/head, voltage/frequency, and discharge orientation.