WL Series Vertical Sewage Pump
WL Series Vertical Sewage Pump

Centrifugal Pump

WL Series Vertical Sewage Pump

The WL series is a vertical single-stage sewage pump designed for high-efficiency transfer of raw sewage, industrial wastewater, and mildly corrosive effluents. Flow up to 4500m³/h, head to 54m, power to 315kW. Materials include cast iron, 304/316L, and duplex steel. Double mechanical seal ensures leak-free operation. Ideal for municipal wastewater treatment plants, storm stations, and factory wastewater systems. ISO certified.
  • OEM
  • Factory Direct Supply
  • ISO9001 Certified
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Overview

Product Overview

Product Description

WL Series Vertical Pump – Space-Saving, Non-Clog, Double Sealed

Vertical dry-pit design – motor mounted above, pump end below floor level, saving footprint. Non-clog open impeller passes solids and fibrous materials without blocking. Double mechanical seal with oil chamber provides backup protection against leakage. Heavy-duty shaft and bearings for continuous operation. Optional wear-resistant liners for abrasive slurries.

KEY FEATURES

  • Vertical Space-Saving Design: Pump submerged in wet well while motor stays dry above – saves valuable floor space compared to horizontal pumps.
  • Non-Clog Open Impeller: Handles solids, stringy materials, and fibrous debris without blocking – maintains efficiency in dirty service.
  • Double Mechanical Seal: Dual seal with intermediate oil chamber provides backup protection; first seal protects against process liquid, second contains leakage.
  • Wide Hydraulic Range: Flow from 5 to 4500 m³/h, head up to 54m – one model family covers many pumping stations.
  • Corrosion-Resistant Options: Materials from cast iron to duplex steel for aggressive industrial wastewater or high-chloride environments.

Specifications

Technical Parameters

Parameter Specification Parameter Specification
Product Name WL Series Vertical Sewage Pump Model WL
Category Vertical Sewage Pump Flow Rate 5 - 4500 m³/h
Head 5 - 54 m Power 1.1 - 315 kW
Speed 970 / 1450 / 2900 rpm Suction & Discharge Diameter 25 - 600 mm
Max. Working Pressure ≤ 0.6 MPa Pump Body Material Cast Iron / 304 / 316L / Duplex Steel
Seal Type Double Mechanical Seal Liquid Temperature Range -15 to +60 ℃
Liquid Type Industrial Sewage / Municipal Sewage / Mildly Corrosive Wastewater / High-Density Sewage Installation Type Vertical
Certification ISO9001 / ISO14001 / ISO45001

Custom models available upon request

Manufacturing

Precision engineering, advanced facilities.

Certifications

Global certifications for reliable performance.

OEM/ODM

Tailor-made pumps for your specifications.

Packaging

Robust export packaging for safe delivery.

Use Cases

Applications

Robust Vertical Sewage Pumping for Treatment Plants, Civil Construction, Industrial Facilities & Agriculture The WL series vertical sewage pump is designed for reliable long-term operation in demanding wastewater applications, handling dirty water, sludge, and mild corrosives with ease.

  • Municipal Wastewater Treatment

    Ideal for lift stations, influent pump houses, sludge transfer, and stormwater pump stations.

  • Civil Engineering & Construction Sites

    Perfect for foundation pit drainage, slurry water, construction site wastewater, and civil defense drainage.

  • Industrial & Commercial Facilities

    Reliable for wastewater discharge from chemical plants, paper mills, textile dyeing, food processing, pharmaceutical factories, and mining operations.

  • Residential & Public Buildings

    Suitable for community sewage stations, hospitals, hotels, shopping malls, and basement drainage.

  • Agriculture & Water Conservancy

    Effective for biogas digester feeding, farmland irrigation drainage, fish pond water exchange, and river dredging dewatering.

Support

Frequently Asked Questions

What is the maximum solids handling capacity of the WL pump?
The WL series is equipped with a non-clog open impeller. Depending on the model, it can pass spherical solids up to 75-100mm in diameter (approximately 3-4 inches). Fibrous materials like rags, strings, and plastics pass through without clogging. For larger solids or heavy ragging, we can recommend a channel impeller or cutter option.
Why choose a vertical dry-pit sewage pump instead of a submersible pump?
Vertical dry-pit pumps keep the motor and electrical connections completely above the wet well floor, making inspection, maintenance, and repair much easier and safer (no confined space entry). They also allow the use of standard industrial motors and are often preferred in large municipal plants where reliability and ease of service justify the additional building cost.
How does the double mechanical seal work and how is it monitored?
The WL pump uses two mechanical seals with an oil-filled chamber between them. The lower seal faces the pumped liquid, and the upper seal faces the atmosphere. An oil level sensor (optional) in the chamber provides early warning of seal leakage. If the lower seal fails, the oil chamber prevents immediate leakage to the environment, and the upper seal acts as a backup. Regular oil inspection is recommended.
What materials are recommended for corrosive industrial wastewater (e.g., pH 3-5 or containing chlorides)?
For mildly acidic or alkaline wastewater (pH 4-10), 304 stainless steel is generally sufficient. For higher acidity (pH 2-4) or wastewater containing chlorides (e.g., textile dyeing effluent), 316L or duplex stainless steel (2205) is recommended. Please provide your water analysis, and our engineers will confirm the optimal material for corrosion resistance and cost-effectiveness.
Can the WL pump be installed in a dry pit with long suction piping?
Yes, the WL is a dry-pit pump that requires a flooded suction (i.e., liquid level above the pump centerline) or a properly designed suction pipe with no air pockets. It is not self‑priming, so the suction line must be filled. For negative suction lift applications, please consider our SP self‑priming sewage pump series instead.

Have more questions? Our technical team is ready to help you select the right pump model.

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Need Help Selecting the Right Pump?

Our engineering team will provide a professional selection recommendation within 24 hours based on your specific requirements.

Contact Information

WeChat: +86-13952764345
Address Industrial Park
Manufacturing District, China

What We Need

Flow Rate Required Specify your required flow rate (m³/h)
Total Head Needed Required pumping head (m)
Liquid Type Type of liquid to be pumped
Solid Particle Size Maximum solid size (mm)

Response Time

24-48h

Technical recommendations and quotations during business days

Our experienced engineers will analyze your application and provide detailed pump selection with complete technical specifications and pricing.

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