Duwan Environmental Pump Products, WDS Single-Stage Centrifugal PipelinePumpPrimary Materials：

Pump Housing:Cast IronOr equivalent

Impeller:Cast IronOr equivalent

Main Axis:Cast IronOr equivalent

Wear-Resistant LiningCast IronOr equivalent

Axial Seal: Mechanical Seal

Manufacture, inspection, testing, and acceptance

（1Each pump must undergo inspection and testing for compliance before it can be shipped out, accompanied by a product certification and user manual.

（2Material testing should include chemical composition tests, mechanical property tests, and non-destructive tests, etc.

（3The pump testing and inspection include:

a.Water Test

For pressure parts(Pump bodies, pump covers, and sealing end caps, including fasteners)The test pressure should be conducted at the basic design pressure.1.5 The company has successfully completed the water pressure test with a multiple of the rated pressure. The test should be conducted using cold, clean water, and the pressure should be maintained for a minimum duration of10 Minutes, no visible leaks observed.

b.Performance Testing

·Hydraulic Testing &NPSH The test should be conducted as per the protocol.JB3562 Standard Proceeding

·Vibration tests conductedJB/TQ380 Standard procedures are in place.

·Noise Test ConductedJB/TQ381 Standard Proceeding

·Monitor bearing temperature<80℃

·Detecting Leaks in Sealed Containers

c.Inspect

·Pre-assembly Component Inspection

·After trial operation, internal inspection of the pump body and sealing ring

·Dimensional inspection installed

·Inspection of auxiliary piping and other accessories

·Complete Machine Appearance Inspection(Label data, surface paint, packing list, random documents, and attachments) ·Operational Status Inspection(Including the shift)

WDSHorizontal CentrifugePumps shipped with factory accessoriesMaterials：

Equipment Origin, Country of Origin, and Full Manufacturer's Name

Form, model, specifications, dimensions, technical performance, and relevant parameters of the equipment

Basic bolt layout detail and civil load

Overall layout drawing of pump assembly

Pump structural assembly diagram

Detailed technical specifications

Material and Protective Coating Specifications

Equipment's exterior dimensions and space requirements for installation and maintenance operations.

Electrical Schematic and Terminal Wiring DiagramØ Control Schematic

Manuals or Equipment List

Centrifugal Pump Technical Data Sheet

Supplier List (including item names, quantities, specifications, performance parameters, materials, and origin)

Installation, operation, and maintenance manuals for equipment (provided after contract signing)