What is the valve diameter range?

The valve type diameter ranges from DN25 to DN400.

Is OEM service available?

Yes, OEM and ODM services are available for our products.

What is the warranty or quality guarantee?

We have 3 QA/QC inspectors and perform random visual and function inspections.

High-Performance Plate Check Valves with Advanced Backflow Protection

Name: High-Performance Plate Check Valves with Advanced Backflow Protection
Brand: Wenzhou Jianqing Industrial Company
SKU: 2062262502

Zhejiang, ChinaWenzhou Jianqing Industrial Company

US$1,900.00-2,900.00

2 Sets

Sample price:US$3000.00/set.Request sample

Product profile

Customization

Available

Customized

Standard Component

Non-Standard Component

Model NO.

4DL250B

Material

20#

Rpm Max

2000

Working Pressure Max

400bar

Valve Type Diameter

DN25~DN400

Size

Nps1/2"-Nps16"

Pressure Rating

Class150-Class2500

Transport Package

Wooden Crate

Specification

DN150

Trademark

Origin

China

HS Code

8414909090

Production Capacity

30000PS/Year

Key features

Advanced Backflow Protection: Effectively prevents reverse flow with high dynamic characteristics and almost no wear.

Flexible Customization: Customized RPM, pressure, diameter, and size options available for unique applications.

Versatile Installation: One-way valve can be installed in any position and direction, simplifying engineering design.

Cost-Effective Maintenance: Minimal wear reduces maintenance costs while safeguarding equipment from damage.

Proven Manufacturer: Established in 1977 with decades of experience in compressor parts and valves.

Wide Application Range: Suitable for various industries including petrochemical, gas, and oil fields.

Quality Assurance: ISO45001:2018 and ISO14001 certified with strict random inspection processes.

Global Reach: Exporting to international markets including Russia, Middle East, and Brunei.

Company profile

Flexible CustomizationQuality AssuranceStandardized quality controlManagement Certification

Wenzhou Jianqing Industrial Company

Zhejiang, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Flexible customization CertifiedExport Year: 1 Year CertifiedNearest Port: Ningbo PortAverage Response Time: ≤2.51h

AI-Powered supplier vetting

SummaryThe supplier is a combined company engaged in hydraulic machinery, sealing fillers, pumps, vacuum equipment, hardware, mechanical components, special equipment sales, and technical services. It holds multiple management-system and product-related certifications, including ISO9001, ISO14001, ISO45001, after-sales service certification, and a special equipment production license. Documented procedures exist for corrective actions, complaint handling, supplier-service assessment, and quality assurance. However, the supplier reports no valid manufacturing-capacity contract with related subcontractors, no inventory, overseas warehouse, showroom, agent, or branch, and no overseas service countries. R&D evidence is limited: three R&D engineers, no available SDK, and no new products launched last year. Financial information is represented only by years for selected indicators, without substantive performance values. No Fortune 500 cooperation is reported, while repeat-buyer preference is stated at 50%–80%.

Supplier typeThe supplier is identified as a combined company with a business scope covering hydraulic power machinery and components, sealing fillers, pumps and vacuum equipment, hardware products, mechanical processing, special equipment sales, and technical services. This supports classification as a diversified manufacturer and service provider rather than a narrowly specialized entity.

CertificationsThe supplier reports ISO9001:2015, ISO14001, and ISO45001 certifications, along with measurement management, after-sales service, special equipment production, safety standardization, green packaging, science and technology, and Sinopec EPEC-related qualifications or evaluations. The breadth of reported certifications is explicit evidence of formal quality, environmental, occupational-safety, and sector-related compliance systems.

After-Sales capabilityThe supplier has documented and followed procedures for corrective and preventive actions and customer complaint handling, and holds after-sales service certification. However, it reports no overseas agents or branches, no overseas warehouse or showroom, no overseas service countries, and only training as the stated overseas service offering; therefore, its documented service processes are stronger than its overseas service infrastructure.

R&D capabilityThe supplier reports nearly 40 national invention and new utility patents and three R&D engineers, which supports established technical-development activity. Against this, it has no available SDK and launched no new products in the past year, so the evidence shows patent activity but limited recent product-development output.

Production capacityThe stated business scope includes manufacturing hydraulic machinery and components, sealing fillers, hardware products, pumps and vacuum equipment, and mechanical parts, while certifications include a special equipment production license and quality-system certification. Nevertheless, the supplier reports no valid manufacturing-capacity contract with its factory and related subcontractors, creating a documented gap in contractual production-capacity assurance.