PRACTICAL KNOWLEDGE

Guides

Practical selection and comparison guides for engineers, buyers and industrial sourcing teams.

FEATURED GUIDE

Industrial metal piping and valves in a factory, illustrating the piping context for pump arrangements.

Pumps

How to Decide Whether Centrifugal Pumps Should Run in Series or Parallel

30 October 2026 - By Sino Industry Editorial Team

LATEST GUIDES

Pumps

How to Assess NPSH Margin When Selecting a Centrifugal Pump

Learn how to calculate and compare NPSHA and NPSHR across a centrifugal pump’s operating range and identify when engineering review is needed.

29 October 2026By Sino Industry Editorial Team

Bearings

How to Choose a Locating and Floating Bearing Arrangement

Select a locating and floating bearing arrangement by tracing axial loads, thermal growth, ring retention, fits, and available movement.

28 October 2026By Sino Industry Editorial Team

Illustration of a rolling bearing with its internal radial clearance being measured.

Bearings

When Should You Specify C3 Bearing Internal Clearance?

Specify C3 bearing clearance only when fits, temperature differences, or mounting conditions would reduce normal clearance too far in service.

27 October 2026By Sino Industry Editorial Team

An orange industrial pipe lying on gravel, illustrating slurry transport equipment.

Pumps

How to Choose a Pump for Abrasive Slurry Service

Select an abrasive slurry pump using measured solids data, corrected duty calculations, wear materials, sealing needs, and maintenance access.

26 October 2026By Sino Industry Editorial Team

Pumps

Flooded Suction vs Suction Lift: Choosing a Centrifugal Pump Installation

Compare flooded suction and suction lift using liquid level, NPSH, piping losses, priming needs, inlet pressure, and maintenance constraints.

25 October 2026By Sino Industry Editorial Team

Close-up of a pressure gauge mounted on industrial equipment.

Valves

How to Select Valve Pressure Class for Operating Pressure and Temperature

Select valve pressure class by checking the complete documented pressure-temperature rating, end connections, materials, and transient duty.

24 October 2026By Sino Industry Editorial Team

Illustration of grease being applied to an industrial bearing

Bearings

How to Choose Grease for an Industrial Bearing

Select industrial bearing grease by load, speed, temperature, contamination, sealing and relubrication method—not NLGI grade alone.

23 October 2026By Sino Industry Editorial Team

Centrifugal pump impeller with curved vanes and wetted surfaces highlighted for material selection

Pumps

How to Choose a Centrifugal Pump Impeller Material for Your Liquid

Select centrifugal pump impeller materials by evaluating liquid chemistry, temperature, solids, corrosion, erosion, hydraulic duty, and manufacturer limits.

22 October 2026By Sino Industry Editorial Team

Close-up of a metal object in a factory, illustrating industrial coupling hardware.

Components

How to Choose a Coupling Between a Gearbox and Driven Machine

Select a gearbox output coupling by torque, speed, shaft connection, misalignment, torsional behavior, environment, and maintenance access.

20 October 2026By Sino Industry Editorial Team

Hands using a digital caliper to measure metal part

Sourcing

How to Evaluate Testing and Acceptance Evidence for Surplus Industrial Parts

Learn how to verify identity, condition, test history, and duty suitability before accepting surplus industrial parts for installation.

19 October 2026By Sino Industry Editorial Team

Pneumatic valve actuator assembly, the final element considered when selecting a loss-of-utility fail position.

Valves

How to Choose a Valve Actuator Fail Position for Loss of Power or Air

Choose fail open, fail closed, or fail in place by assessing process hazards, utility-loss scenarios, actuator capability, and test evidence.

18 October 2026By Sino Industry Editorial Team

Valves

Ball, Butterfly, Gate, or Globe Valve? Match Valve Type to Duty

Compare ball, butterfly, gate, and globe valves by isolation, throttling, pressure drop, fluid conditions, shutoff needs, and maintenance access.

17 October 2026By Sino Industry Editorial Team

Pumps

How to Set Minimum Flow Protection for a Centrifugal Pump

Set centrifugal pump minimum-flow protection using manufacturer limits, credible low-demand cases, recycle-duty calculations, and functional checks.

16 October 2026By Sino Industry Editorial Team

Pressure gauges and valves are shown in monochrome

Sourcing

How to Verify Test Instrument Readiness Before Pre-Shipment Testing

A practical checklist for confirming that instruments used in pre-shipment tests are suitable, traceable, and supported by valid evidence.

15 October 2026By Sino Industry Editorial Team

Centrifugal pump equipment illustrating variable-flow control choices.

Pumps

VFD, Throttling, or Bypass? How to Control Variable Pump Flow

Compare VFDs, discharge throttling, and bypass control for centrifugal pumps using system curves, duty profiles, operating limits, and verification steps.

14 October 2026By Sino Industry Editorial Team

Engineering drawing and part identification documents being checked before a supplier order

Sourcing

How to Verify a Supplier Drawing and Part Number Before Ordering

A practical method for reconciling supplier part numbers, drawing revisions, materials, and purchase-order requirements before release.

13 October 2026By Sino Industry Editorial Team

Illustration of a shaft with locating and floating bearing positions accommodating axial thermal movement

Components

How to Choose a Locating and Floating Bearing Arrangement for a Shaft

Select locating and floating bearing positions by defining thrust paths, thermal expansion, ring fits, retention features, and installation checks.

12 October 2026By Sino Industry Editorial Team

Pumps

Single or Dual Mechanical Seal? How to Choose an Arrangement for Your Service

Compare single, dual unpressurized, and dual pressurized mechanical seal arrangements by leakage consequence, fluid duty, support systems, and maintenance capability.

11 October 2026By Sino Industry Editorial Team

Illustration of industrial equipment test evidence being reviewed before shipment

Sourcing

How to Review Pre-Shipment Test Evidence for Industrial Equipment

Review supplier pre-shipment test evidence by checking acceptance criteria, serial traceability, actual results, deviations, instruments, and release approvals.

10 October 2026By Sino Industry Editorial Team

Industrial equipment in a factory testing area

Sourcing

How to Define Pre-Shipment Functional Tests for Industrial Equipment

Define pre-shipment functional tests with measurable criteria, agreed test conditions, traceable records, and controlled deviation closure.

9 October 2026By Sino Industry Editorial Team

Industrial motor enclosure in a factory setting exposed to dust and water

Power motion

How to Choose an Industrial Motor Enclosure for Dusty or Wet Environments

Select an industrial motor enclosure by matching dust, water, washdown, cooling, materials, and installation conditions to documented motor limits.

8 October 2026By Sino Industry Editorial Team

Industrial equipment nameplate and certification mark being checked during incoming inspection

Sourcing

How to Verify Industrial Equipment Certification Marks at Incoming Inspection

A practical process for checking certification marks, approval scope, and official records before releasing industrial equipment for installation.

7 October 2026By Sino Industry Editorial Team

Rolling bearing lubrication comparison for choosing between grease and oil

Bearings

Bearing Grease vs Oil: How to Choose Lubrication for Rolling Bearings

Choose grease or oil for rolling bearings by comparing speed, heat, contamination, sealing, maintenance access, and system design.

6 October 2026By Sino Industry Editorial Team

Illustration of industrial pump piping transferring a viscous liquid

Pumps

Centrifugal or Positive-Displacement Pump for Viscous Liquids?

Choose a pump for viscous liquids by comparing corrected hydraulic performance, pressure control, inlet conditions, shear limits, and temperature range.

5 October 2026By Sino Industry Editorial Team

Illustration of a bearing fitted between a rotating shaft and a housing.

Bearings

How to Select Bearing Fits for Rotating Shafts and Housings

Select shaft and housing bearing fits by evaluating ring load, temperature, materials, accuracy, axial movement, and safe assembly method.

4 October 2026By Sino Industry Editorial Team

Pump impeller illustrating material selection for corrosive or abrasive service.

Pumps

How to Select Pump Materials for Corrosive or Abrasive Service

Select pump wetted materials by fluid chemistry, temperature, solids, hydraulic duty, and component-specific operating limits.

3 October 2026By Sino Industry Editorial Team

Industrial fasteners illustrating material and coating choices for corrosive service

Components

How to Choose Industrial Fastener Materials and Coatings for Corrosive Service

Select industrial fastener materials and coatings by evaluating corrosive exposure, joint design, strength, temperature, installation and verification needs.

2 October 2026By Sino Industry Editorial Team

Industrial shaft coupling assembly connecting two rotating shafts.

Components

Industrial Coupling Types: How to Choose Between Rigid, Flexible, and Fluid Couplings

Select rigid, flexible, or fluid couplings by torque, speed, alignment, torsional duty, environment, and maintenance access.

1 October 2026By Sino Industry Editorial Team

Supplier quality certificate document for checking issuer, scope, and order details.

Sourcing

How to Verify a Supplier Quality Certificate Covers the Product You’re Buying

A practical sequence for checking a supplier certificate’s issuer, validity, legal entity, site, scope, and connection to a specific order.

30 September 2026By Sino Industry Editorial Team

Pumps

How to Check NPSH Margin When Selecting a Centrifugal Pump

Calculate and compare NPSH available and required across the operating range, including temperature, suction losses, source level, and site pressure.

28 September 2026By Sino Industry Editorial Team

Illustration of a centrifugal pump performance curve intersecting a system curve at the operating point

Pumps

How to Match a Centrifugal Pump to Its System Curve

Learn how to compare centrifugal pump curves and system curves, identify the operating point, and check flow, head, power, NPSH, and operating limits.

27 September 2026By Sino Industry Editorial Team

Industrial valve actuator assembly mounted on a process valve.

Valves

How to Size an Industrial Valve Actuator: Torque, Thrust, Utilities, and Fail Position

A practical method for sizing industrial valve actuators by valve demand, utility conditions, fail position, controls, and manufacturer data.

26 September 2026By Sino Industry Editorial Team

Mechanical seal assembly shown in a pump cross-section.

Pumps

How to Choose a Mechanical Seal: Materials, Arrangement, and Flush Plan

Specify a mechanical seal from actual seal-chamber duty, material compatibility, arrangement, shaft movement, and seal support requirements.

25 September 2026By Sino Industry Editorial Team

Valves

How to Source Industrial Control Valves from China: Specification, Supplier Checks, and Inspection

A practical process for specifying, qualifying, inspecting, and accepting industrial control valves sourced from China.

24 September 2026By Sino Industry Editorial Team

Factory equipment being checked against a pre-shipment functional test checklist and acceptance criteria.

Sourcing

How to Specify Supplier Pre-Shipment Functional Tests and Acceptance Criteria

Define supplier pre-shipment functional tests with measurable limits, required records, deviation control, and clear shipment-release authority.

23 September 2026By Sino Industry Editorial Team

Industrial helical gearbox assembly with visible gears and housing components

Power motion

How to Choose a Gearbox Type: Torque, Ratio, Speed, and Duty

Select an industrial gearbox by calculating speed and torque requirements, then checking duty cycle, thermal limits, mounting, shaft loads, and maintenance.

22 September 2026By Sino Industry Editorial Team

Industrial bearing inspection showing surface damage on a rolling bearing

Bearings

How to Identify Bearing Failure Types from Noise, Heat, Vibration, and Surface Damage

Learn how to distinguish common bearing failure types from operating symptoms and surface evidence without mistaking screening clues for a confirmed diagnosis.

20 September 2026By Sino Industry Editorial Team

Industrial AC and DC motors connected to variable-speed drive equipment

Power motion

AC Motor vs DC Motor for Variable-Speed Industrial Drives

Compare AC and DC motors for variable-speed drives by duty, torque, control, braking, maintenance, environment, and retrofit requirements.

18 September 2026By Sino Industry Editorial Team

Valves

Gate Valve vs Globe Valve: How to Choose for Isolation, Throttling, Pressure Drop, and Maintenance

Compare gate and globe valves by flow path, isolation and throttling duty, pressure loss, fluid service, actuator sizing, and maintenance needs.

17 September 2026By Sino Industry Editorial Team

Comparison illustration of industrial positive displacement and centrifugal pump types

Pumps

Positive Displacement Pump vs Centrifugal Pump: How to Choose by Flow, Viscosity, Pressure, and Control

Choose between positive displacement and centrifugal pumps by comparing flow behavior, viscosity, pressure response, control, and suction conditions.

16 September 2026By Sino Industry Editorial Team

Diagram of a bearing fitted between a shaft and housing.

Bearings

How to Select a Bearing Fit: Shaft and Housing Tolerances for Load, Temperature, and Mounting

Select bearing shaft and housing fits by load direction, temperature, support stiffness, internal clearance, and mounting constraints.

15 September 2026By Sino Industry Editorial Team

Centrifugal pump connected to a suction pipe and source vessel in an industrial pumping system

Pumps

How to Prevent Centrifugal Pump Cavitation: NPSH, Suction Conditions, and System Checks

Calculate available NPSH, interpret pump curves, inspect suction conditions, and verify corrective actions before centrifugal pump cavitation causes damage.

12 September 2026By Sino Industry Editorial Team

Industrial valve actuator assembly mounted on a valve

Components

How to Select a Valve Actuator: Torque, Fail Position, Control Signal, and Service Conditions

Select a pneumatic, electric, or hydraulic valve actuator by checking load, fail action, duty, utilities, controls, environment, and acceptance tests.

10 September 2026By Sino Industry Editorial Team

Pumps

How to Read a Pump System Curve: Finding the Real Duty Point and Avoiding Oversizing

Learn how static head, system resistance, controls, pump speed, NPSH and operating limits determine a centrifugal pump’s real duty point.

9 September 2026By Sino Industry Editorial Team

Components

How to Select a Pump Mechanical Seal: Fluid, Pressure, Temperature, and Dry-Run Risk

Select a pump mechanical seal by checking fluid compatibility, seal-chamber duty, dry-run risk, arrangement, support system, and supplier documents.

8 September 2026By Sino Industry Editorial Team

Pump, piping system curve and duty point arranged as an industrial selection schematic

Pumps

How to Choose an Industrial Pump

A practical method for selecting pump type, duty point, materials, seal arrangement and motor without relying on catalogue flow alone.

8 September 2026By Sino Industry Editorial Team

Valve body, process conditions and specification checklist connected in a selection schematic

Valves

How to Choose an Industrial Valve

Select an industrial valve by function, fluid, pressure, temperature, materials, actuation and maintainability.

20 August 2026By Sino Industry Editorial Team

Sourcing

How to Source Industrial Pumps from China

Build a pump sourcing process around duty data, manufacturer capability, documentation, inspection and acceptance tests.

18 August 2026By Sino Industry Editorial Team

Bolt, stud, nut, washer and locking elements arranged around a clamped industrial joint

Components

Types of Industrial Fasteners

Understand bolts, screws, studs, nuts, washers and locking methods by load, joint design, material and service.

11 August 2026By Sino Industry Editorial Team

AC induction motor and brushed DC motor compared with their drive and commutator features

Power motion

AC Motor vs DC Motor

Compare industrial AC and DC motors by speed control, torque, maintenance, drives, efficiency and application requirements.

6 August 2026By Sino Industry Editorial Team

Butterfly disc and bored ball shown side by side in quarter-turn valve bodies

Valves

Butterfly Valve vs Ball Valve

Compare butterfly and ball valves for bore size, shutoff, torque, weight, pressure drop and automated service.

30 July 2026By Sino Industry Editorial Team

Valve factory machining, material traceability, pressure testing and audit records linked in a qualification workflow

Sourcing

How to Find a Reliable Valve Manufacturer in China

Evaluate Chinese valve manufacturers through scope, standards, foundry control, testing, traceability and order execution.

28 July 2026By Sino Industry Editorial Team

Ball and cylindrical roller contact patterns compared between bearing raceways

Bearings

Ball Bearing vs Roller Bearing

Compare point and line contact in ball and roller bearings for load capacity, speed, stiffness, friction and misalignment.

23 July 2026By Sino Industry Editorial Team

Tank liquid level, suction line and pump inlet shown as an NPSH relationship schematic

Pumps

NPSH Explained for Pump Buyers

Understand available and required NPSH, cavitation risk and the installation details that protect pump suction performance.

16 July 2026By Sino Industry Editorial Team

Rotating and stationary seal faces shown with process fluid, flush and leakage paths

Components

Mechanical Seal Selection Guide

Select mechanical seal faces, elastomers, arrangement and support system for pump fluid, pressure and temperature.

14 July 2026By Sino Industry Editorial Team

Bearing raceway surrounded by lubrication, contamination, heat and misalignment warning symbols

Bearings

Common Bearing Failure Causes

Recognise lubrication, contamination, fit, alignment, electrical and handling problems before replacing a failed bearing.

18 June 2026By Sino Industry Editorial Team