100+ answered questions about industrial valves, product selection, quality control, and technical support from Lianggu Valve Group
Lianggu Valve Group Co., Ltd. is a joint-stock enterprise integrating product design, mold manufacturing, casting/forging production, machining, assembly, performance testing and inspection. Our product line covers 20 major categories of industrial valves including gate valves, globe valves, check valves, ball valves, butterfly valves, power station valves, regulating valves, forged steel valves, bellows valves, and more.
With the business philosophy of "Vision, Innovation, Integrity, Dedication", we continuously improve our quality system to meet customer needs, ensure on-time delivery, and provide enthusiastic service. Our valves serve power, petroleum, chemical, gas, steel, biological, municipal, and heating industries worldwide.
Contact us: Tel: +86-15601794339 | Email: info@chlgvalve.com | Address: No.32, Gangqiang Road, Wenzhou City, Zhejiang Province, China
We are not just forwarding prices. Lianggu Valve Group integrates design, R&D, manufacturing, testing and sales, supporting industrial valve buyers who need stable supply and project documentation.
For social media promotion, the current focus is on Gate Valve, Globe Valve, Check Valve, Ball Valve, Butterfly Valve, Power Station Valve, Regulating Valve and Natural Gas Ball Valve. Content should focus on selection, applications, quality testing, project documents and factory capability.
The official website lists DN10-DN5000, 1/2"-80", 0.25-80.0MPa, 150LB-4500LB and -196℃ to 1350℃. Final model selection depends on working conditions and technical confirmation.
Our valves serve power, petroleum, chemical, gas, steel, biological, municipal and heating industries. Different working conditions require selection by medium, pressure, temperature and standards.
High temperature, cryogenic service, high pressure, corrosion and solid particles all affect material, sealing, structure and testing requirements. A cheap wrong selection often costs more than the valve itself.
From raw material, machining, assembly and pressure testing to final inspection, we can prepare ITP, inspection reports, NDT, calibration and traceability files according to project requirements.
Audit materials show valve test benches, pneumatic pressure test pumps, ultrasonic flaw detectors, magnetic particle detectors, spectrometers, hardness testers, thickness gauges, universal testing machine, impact testing machine and metallographic equipment.
Equipment records show horizontal/vertical lathes, CNC lathes, vertical/horizontal/gantry machining centers, precision CNC ball grinding machine, automatic welding machines and valve seat press.
Yes. We can prepare company qualifications, organization chart, equipment list, inspection capability, ITP, certificates, calibration and environmental compliance documents according to your audit checklist.
Yes. Third-party inspection can be supported according to project requirements. Inspection agency, witness points, test items, report language and document requirements should be confirmed during quotation.
Yes. We can prepare drawings, design calculations, process cards, quality plans, ITP, material documents, inspection reports, pressure test records, NDT/calibration/certificates according to order requirements.
Audit materials include low-emission related files, packing certificates and TUV Rheinland certificate documents. If fugitive emission requirements apply, standards and test documents should be confirmed early.
Audit files include PT/UT certificates, NDT procedure cards, NDT evaluations and reports, supporting penetrant testing and ultrasonic testing for critical areas.
Audit documents include WPS/PQR/WPQ, hardfacing procedure cards, special process validation for heat treatment and heat treatment cards for multiple materials. Special processes are controlled by documents, not only by experience.
Materials can be verified by certificates, spectrometer analysis, hardness/mechanical testing and heat treatment records. Relevant material and inspection documents can be provided according to order requirements.
Regular stocked models can be arranged faster. Non-standard, special material, high-pressure or batch orders need technical confirmation, material preparation and production schedule. Earlier parameter confirmation helps control delivery time.
Yes, sample requests can be discussed. Please provide valve type, size, pressure class, material, connection, medium and quantity. We will check stock or production schedule and quote accordingly.
Valves are usually protected and packed in wooden or plywood cases suitable for export transportation. Sea freight, moisture-proof, anti-rust, shipping mark or spare parts packing requirements should be confirmed early.
We can provide technical communication for installation, commissioning, maintenance and problem analysis. Special warranty, spare parts or site service requirements should be clarified at contract stage.
Audit files include VOC, wastewater, exhaust gas, noise testing, hazardous waste management, pollutant discharge permit execution report and environmental emergency plan, supporting EHS audit review.
We are not just forwarding prices. Lianggu Valve Group integrates design, R&D, manufacturing, testing and sales, supporting industrial valve buyers who need stable supply and project documentation.
The current social media promotion focuses on Gate Valve, Globe Valve, Check Valve, Ball Valve, Butterfly Valve, Power Station Valve, Regulating Valve and Natural Gas Ball Valve. Other valve types can be mentioned as project capabilities, but they are not included in this focused promotion list.
The official website lists DN10-DN5000, 1/2"-80", 0.25-80.0MPa, 150LB-4500LB and -196℃ to 1350℃. Final model selection depends on working conditions and technical confirmation.
Our valves serve power, petroleum, chemical, gas, steel, biological, municipal and heating industries. Different working conditions require selection by medium, pressure, temperature and standards.
High temperature, cryogenic service, high pressure, corrosion and solid particles all affect material, sealing, structure and testing requirements. A cheap wrong selection often costs more than the valve itself.
From raw material, machining, assembly and pressure testing to final inspection, we can prepare ITP, inspection reports, NDT, calibration and traceability files according to project requirements.
Audit materials show valve test benches, pneumatic pressure test pumps, ultrasonic flaw detectors, magnetic particle detectors, spectrometers, hardness testers, thickness gauges, universal testing machine, impact testing machine and metallographic equipment.
Equipment records show horizontal/vertical lathes, CNC lathes, vertical/horizontal/gantry machining centers, precision CNC ball grinding machine, automatic welding machines and valve seat press.
Yes. We can prepare company qualifications, organization chart, equipment list, inspection capability, ITP, certificates, calibration and environmental compliance documents according to your audit checklist.
Yes. Third-party inspection can be supported according to project requirements. Inspection agency, witness points, test items, report language and document requirements should be confirmed during quotation.
Yes. We can prepare drawings, design calculations, process cards, quality plans, ITP, material documents, inspection reports, pressure test records, NDT/calibration/certificates according to order requirements.
Audit materials include low-emission related files, packing certificates and TUV Rheinland certificate documents. If fugitive emission requirements apply, standards and test documents should be confirmed early.
Audit files include PT/UT certificates, NDT procedure cards, NDT evaluations and reports, supporting penetrant testing and ultrasonic testing for critical areas.
Audit documents include WPS/PQR/WPQ, hardfacing procedure cards, special process validation for heat treatment and heat treatment cards for multiple materials. Special processes are controlled by documents, not only by experience.
Materials can be verified by certificates, spectrometer analysis, hardness/mechanical testing and heat treatment records. Relevant material and inspection documents can be provided according to order requirements.
Regular stocked models can be arranged faster. Non-standard, special material, high-pressure or batch orders need technical confirmation, material preparation and production schedule. Earlier parameter confirmation helps control delivery time.
Yes, sample requests can be discussed. Please provide valve type, size, pressure class, material, connection, medium and quantity. We will check stock or production schedule and quote accordingly.
Valves are usually protected and packed in wooden or plywood cases suitable for export transportation. Sea freight, moisture-proof, anti-rust, shipping mark or spare parts packing requirements should be confirmed early.
We can provide technical communication for installation, commissioning, maintenance and problem analysis. Special warranty, spare parts or site service requirements should be clarified at contract stage.
Audit files include VOC, wastewater, exhaust gas, noise testing, hazardous waste management, pollutant discharge permit execution report and environmental emergency plan, supporting EHS audit review.
Gate Valve is built for reliable full-open/full-close pipeline isolation and commonly used in petrochemical, power, municipal water, steam and high-pressure main lines. If you are not sure about the model, send us the working condition first.
The common risk is infrequent operation with high sealing and low pressure-drop requirements. Valve selection is not only about size and price; medium, pressure, temperature and standards must be reviewed together.
Please provide size, pressure class, material, connection, medium, temperature, quantity, operation method, standard and certificate/testing requirements.
Yes. Non-standard size, special material, sealing structure, connection, actuator, inspection documents and packing requirements can be discussed by project.
According to standards and order requirements, shell pressure, seat sealing, appearance, dimensions and documents can be checked. ITP, NDT, material and calibration documents can also be supported.
Yes. Drawings, quality plan, ITP, material certificates, inspection reports, pressure test records, NDT/calibration/certificates can be prepared according to order requirements.
Regular stocked models can be arranged faster. Non-standard, special material, high-pressure or batch orders depend on technical confirmation and production schedule.
Differences usually come from material, pressure class, sealing structure, standard, testing requirements, actuator and document package. Technical conditions should be aligned before quotation.
The most ignored part is site condition. Is the medium corrosive? Does temperature fluctuate? Is operation frequent? Is third-party inspection required? All these affect selection.
No problem. Send medium, pressure, temperature, size, connection standard and quantity. We can first check whether Gate Valve is suitable.
Globe Valve is suitable for shut-off with throttling control and commonly used in steam, thermal oil, chemical process lines and throttling service. If you are not sure about the model, send us the working condition first.
The common risk is flow direction, pressure difference and disc sealing structure must be checked. Valve selection is not only about size and price; medium, pressure, temperature and standards must be reviewed together.
Please provide size, pressure class, material, connection, medium, temperature, quantity, operation method, standard and certificate/testing requirements.
Yes. Non-standard size, special material, sealing structure, connection, actuator, inspection documents and packing requirements can be discussed by project.
According to standards and order requirements, shell pressure, seat sealing, appearance, dimensions and documents can be checked. ITP, NDT, material and calibration documents can also be supported.
Yes. Drawings, quality plan, ITP, material certificates, inspection reports, pressure test records, NDT/calibration/certificates can be prepared according to order requirements.
Regular stocked models can be arranged faster. Non-standard, special material, high-pressure or batch orders depend on technical confirmation and production schedule.
Differences usually come from material, pressure class, sealing structure, standard, testing requirements, actuator and document package. Technical conditions should be aligned before quotation.
The most ignored part is site condition. Is the medium corrosive? Does temperature fluctuate? Is operation frequent? Is third-party inspection required? All these affect selection.
No problem. Send medium, pressure, temperature, size, connection standard and quantity. We can first check whether Globe Valve is suitable.
Check Valve is prevents backflow automatically and protects pumps, compressors and pipelines and commonly used in pump discharge, compressor outlet, water systems and backflow prevention. If you are not sure about the model, send us the working condition first.
The common risk is backflow, water hammer and disc impact can affect system stability. Valve selection is not only about size and price; medium, pressure, temperature and standards must be reviewed together.
Please provide size, pressure class, material, connection, medium, temperature, quantity, operation method, standard and certificate/testing requirements.
Yes. Non-standard size, special material, sealing structure, connection, actuator, inspection documents and packing requirements can be discussed by project.
According to standards and order requirements, shell pressure, seat sealing, appearance, dimensions and documents can be checked. ITP, NDT, material and calibration documents can also be supported.
Yes. Drawings, quality plan, ITP, material certificates, inspection reports, pressure test records, NDT/calibration/certificates can be prepared according to order requirements.
Regular stocked models can be arranged faster. Non-standard, special material, high-pressure or batch orders depend on technical confirmation and production schedule.
Differences usually come from material, pressure class, sealing structure, standard, testing requirements, actuator and document package. Technical conditions should be aligned before quotation.
The most ignored part is site condition. Is the medium corrosive? Does temperature fluctuate? Is operation frequent? Is third-party inspection required? All these affect selection.
No problem. Send medium, pressure, temperature, size, connection standard and quantity. We can first check whether Check Valve is suitable.
Ball Valve is fast operation and reliable sealing for severe shut-off and automation and commonly used in oil & gas, refining, LNG, heating networks and tight shut-off service. If you are not sure about the model, send us the working condition first.
The common risk is structure selection is critical for high pressure, cryogenic media, particles or frequent operation. Valve selection is not only about size and price; medium, pressure, temperature and standards must be reviewed together.
Please provide size, pressure class, material, connection, medium, temperature, quantity, operation method, standard and certificate/testing requirements.
Yes. Non-standard size, special material, sealing structure, connection, actuator, inspection documents and packing requirements can be discussed by project.
According to standards and order requirements, shell pressure, seat sealing, appearance, dimensions and documents can be checked. ITP, NDT, material and calibration documents can also be supported.
Yes. Drawings, quality plan, ITP, material certificates, inspection reports, pressure test records, NDT/calibration/certificates can be prepared according to order requirements.
Regular stocked models can be arranged faster. Non-standard, special material, high-pressure or batch orders depend on technical confirmation and production schedule.
Differences usually come from material, pressure class, sealing structure, standard, testing requirements, actuator and document package. Technical conditions should be aligned before quotation.
The most ignored part is site condition. Is the medium corrosive? Does temperature fluctuate? Is operation frequent? Is third-party inspection required? All these affect selection.
No problem. Send medium, pressure, temperature, size, connection standard and quantity. We can first check whether Ball Valve is suitable.
Butterfly Valve is compact and cost-effective for large-diameter flow control and commonly used in water treatment, HVAC, chemical utilities and large-diameter pipelines. If you are not sure about the model, send us the working condition first.
The common risk is seal type, disc material and operation method affect service life. Valve selection is not only about size and price; medium, pressure, temperature and standards must be reviewed together.
Please provide size, pressure class, material, connection, medium, temperature, quantity, operation method, standard and certificate/testing requirements.
Yes. Non-standard size, special material, sealing structure, connection, actuator, inspection documents and packing requirements can be discussed by project.
According to standards and order requirements, shell pressure, seat sealing, appearance, dimensions and documents can be checked. ITP, NDT, material and calibration documents can also be supported.
Yes. Drawings, quality plan, ITP, material certificates, inspection reports, pressure test records, NDT/calibration/certificates can be prepared according to order requirements.
Regular stocked models can be arranged faster. Non-standard, special material, high-pressure or batch orders depend on technical confirmation and production schedule.
Differences usually come from material, pressure class, sealing structure, standard, testing requirements, actuator and document package. Technical conditions should be aligned before quotation.
The most ignored part is site condition. Is the medium corrosive? Does temperature fluctuate? Is operation frequent? Is third-party inspection required? All these affect selection.
No problem. Send medium, pressure, temperature, size, connection standard and quantity. We can first check whether Butterfly Valve is suitable.
Power Station Valve is designed for high-temperature and high-pressure systems with focus on material, sealing and stability and commonly used in main steam, feedwater, drain, bypass and high-temperature high-pressure systems. If you are not sure about the model, send us the working condition first.
The common risk is thermal cycling, pressure shock and high-temperature sealing are key selection points. Valve selection is not only about size and price; medium, pressure, temperature and standards must be reviewed together.
Please provide size, pressure class, material, connection, medium, temperature, quantity, operation method, standard and certificate/testing requirements.
Yes. Non-standard size, special material, sealing structure, connection, actuator, inspection documents and packing requirements can be discussed by project.
According to standards and order requirements, shell pressure, seat sealing, appearance, dimensions and documents can be checked. ITP, NDT, material and calibration documents can also be supported.
Yes. Drawings, quality plan, ITP, material certificates, inspection reports, pressure test records, NDT/calibration/certificates can be prepared according to order requirements.
Regular stocked models can be arranged faster. Non-standard, special material, high-pressure or batch orders depend on technical confirmation and production schedule.
Differences usually come from material, pressure class, sealing structure, standard, testing requirements, actuator and document package. Technical conditions should be aligned before quotation.
The most ignored part is site condition. Is the medium corrosive? Does temperature fluctuate? Is operation frequent? Is third-party inspection required? All these affect selection.
No problem. Send medium, pressure, temperature, size, connection standard and quantity. We can first check whether Power Station Valve is suitable.
Regulating Valve is helps stabilize flow, pressure or temperature in process loops and commonly used in flow, pressure and temperature control loops. If you are not sure about the model, send us the working condition first.
The common risk is Cv, pressure drop, actuator and control signal must be matched. Valve selection is not only about size and price; medium, pressure, temperature and standards must be reviewed together.
Please provide size, pressure class, material, connection, medium, temperature, quantity, operation method, standard and certificate/testing requirements.
Yes. Non-standard size, special material, sealing structure, connection, actuator, inspection documents and packing requirements can be discussed by project.
According to standards and order requirements, shell pressure, seat sealing, appearance, dimensions and documents can be checked. ITP, NDT, material and calibration documents can also be supported.
Yes. Drawings, quality plan, ITP, material certificates, inspection reports, pressure test records, NDT/calibration/certificates can be prepared according to order requirements.
Regular stocked models can be arranged faster. Non-standard, special material, high-pressure or batch orders depend on technical confirmation and production schedule.
Differences usually come from material, pressure class, sealing structure, standard, testing requirements, actuator and document package. Technical conditions should be aligned before quotation.
The most ignored part is site condition. Is the medium corrosive? Does temperature fluctuate? Is operation frequent? Is third-party inspection required? All these affect selection.
No problem. Send medium, pressure, temperature, size, connection standard and quantity. We can first check whether Regulating Valve is suitable.
Natural gas ball valves are suitable for natural gas transmission, gas networks, pressure regulating stations, metering stations, city gas and oil & gas shut-off service.
Natural gas service is sensitive to sealing, fire safety, pressure class and material compatibility. Wrong selection may cause external leakage, operation failure and shutdown risk.
Please provide size, pressure class, connection standard, gas composition, temperature, buried or above-ground installation, fire-safe/anti-static requirements, operation method and document requirements.
Yes. Trunnion or floating design, fully welded structure, fire-safe and anti-static design, stem extension, buried service design, actuator, coating and inspection documents can be discussed by project.
Shell pressure, seat sealing, appearance, dimensions and documents can be checked according to standards and order requirements. ITP, NDT, material documents, pressure test records and third-party inspection can be supported for key projects.
Natural gas is flammable, so fire-safe design, anti-static design and reliable sealing directly affect site safety. Applicable standards and test documents should be confirmed during inquiry.
Yes. Drawings, quality plan, ITP, material certificates, pressure test records, inspection reports, NDT/calibration/certificates can be prepared according to order requirements.
Differences usually come from design type, pressure class, material, sealing class, fire-safe/anti-static requirements, actuator, coating, testing items and document package.
Regular stocked models can be arranged faster. Trunnion, fully welded, buried service, special material or actuated valves depend on technical confirmation, material and production schedule.
No problem. Send medium, pressure, temperature, size, connection standard, installation method and fire-safe/anti-static requirements. We can help review the suitable solution first.