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How to quality check water pumps?——water pump quality inspection process

03. 11, 2024

Stream, sign of quality.

This is not just a slogan, but a principle that we adhere to during our pump manufacturer.

Normally we follow up the process of IQC(incoming quality control), PQC(process quality control), OQC(outgoing quality control).

Have a close look at what we do before a pump is delivered

IQC:

For material incoming quality control, we sort out the raw materials into standard components, special spare parts and key motor parts.

STANDARD COMPONENTS includes:

Mechanical Seal, Bearing, Fan, Fan Cover, Venturi Tube/Diffuser, Bolts.

SPECIAL COMPONENTS includes: impeller, casting ,capacitor

MOTOR PARTS includes: Stator housing, stator, rotor

Take Mechanical Seal as example, we do inspection from below points. 

How to quality check water pumps?——water pump quality inspection process

Bearing part:

Inspection Item:surface, inner diameter, outer diameter, height

Method: eye view, inner diameter gauge, micro-calliper, calliper

Standard: no defect, right size. 

How to quality check water pumps?——water pump quality inspection process

FAN Part:

Inspection item: model, surface

Method: eye view

Standard: right model, surface clean, no shrinkage, no dirt, etc

How to quality check water pumps?——water pump quality inspection process

Diffuser Part

Inspection Item: Surface,diameter,specification

Method: Visual,vernier caliper,drawing

Standard:Surface clean,no shrinkage,no burrs,consistent with the drawing

How to quality check water pumps?——water pump quality inspection process

VENTURI

Inspection Item:appearance,clean,inner diameter

Method:Visual,inner caliper,vernier caliper

Standard:model correct,appearance clean,drawing

How to quality check water pumps?——water pump quality inspection process

Thermal Protector:

Inspection Item:specifications

Method:visual, temperature test, current test

Standard:17AM/140℃(35A5)17AM/120 ℃(31A5)21AM/165 ℃

How to quality check water pumps?——water pump quality inspection process

Terminal Box:

Inspection Item:appearance, strength

How to quality check water pumps?——water pump quality inspection process

Impeller

Inspection Item: surface, specifications, outer dia, flow channel

How to quality check water pumps?——water pump quality inspection process

Pump Body

Inspection Item:size, appearance, inlet inner dia, plug screw size

How to quality check water pumps?——water pump quality inspection process

Pump Bracket

Inspection Item:surface, spigot specification, bearing, mechanical seal

How to quality check water pumps?——water pump quality inspection process

Capacitor

Inspection Item:size, capacity(μF)

How to quality check water pumps?——water pump quality inspection process

The motor is a crucial component and the heart of a pump that cannot fail. At Stream, we take our motors very seriously. We heat our stator housing to 140 degrees and shrink them on to the stator to eliminate the chance of movement that can lead to failure.

Stator Housing

Inspection Item:surface, specifications, inner dia.

How to quality check water pumps?——water pump quality inspection process

Motor Rotor

Inspection Item: size, appearance, dia, bearing spot, mechanical seal spot, impeller spot, shaft distance, length, concentricity. 

How to quality check water pumps?——water pump quality inspection process

Motor Stator

Inspection Item: surface, outer dia., stator length, inner dia. 

How to quality check water pumps?——water pump quality inspection process

The above are the main steps of raw materials incoming quality control. 

As for process control, we execute the inspections from below parts:

Assembly Inspection

Performance Inspection

Pressure Tightness Inspection

Packing Inspection


ASSEMBLY INSPECTION

Spare parts double inspection, castings and pump body double inspection,

Water leakage test, noise test

How to quality check water pumps?——water pump quality inspection process

PRESSURE TIGHTNESS INSPECTION

How to quality check water pumps?——water pump quality inspection process

PUMPING TEST

How to quality check water pumps?——water pump quality inspection process

PERFORMANCE INSPECTION

How to quality check water pumps?——water pump quality inspection process

PACKAGE TEST 

Inspection Item:painting color/ surface / spare parts/ operating/ voltage test

Method of Inspection:visual/ voltage testing equipment/  parameter equipment

Criteria of Inspection:consistency with the requirements of the painting color and spare parts/ painting even and no varnished/ pump operating without noise, viberation or breakage/  qualified unload current and power rate

1~ 1800v/1s、3~2100v/1s without breakdown

How to quality check water pumps?——water pump quality inspection process

Special Test By Requests

LEAKAGE TEST for mechanical seal

Inspection Item:Mechanical seal

Standard:continuous pumping without leakage

How to quality check water pumps?——water pump quality inspection process

SALINE TEST for anti-rusting castings

Inspection Item:anti rust casting performance in salty water

How to quality check water pumps?——water pump quality inspection process


You can depend on Stream for quality and reliability. What you concern, we solve it for you. 


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