How long is your delivery time?

For normal products in 7-10 days; For bulk order, in 15-25 days. It depends.

What is the warranty time?

1 years warranty for all of our stainless steel products. Gaskets or the easy broken parts are not included due to the different application for customers.

Can you provide us with the testing report?

Yes, we can provide the required material reports, such as the material certificate, mill certificate, pressure testing report, measurement report, and hardness report.

PTFE Lined Backflow Prevention Check Valve Corrosion Resistant

Name: PTFE Lined Backflow Prevention Check Valve Corrosion Resistant
Brand: Kailong Fluorine Lined Valve Technology (Zhejiang) Co., Ltd.
SKU: 2274929175

Zhejiang, ChinaKailong Fluorine Lined Valve Technology (Zhejiang) Co., Ltd.

US$39.00

50 Pieces

Product specifications

H44F4-150LBC

Sample price:US$48.00/piece.Request sample

Product profile

Customization

Available

Media

Acid

Temperature

Ordinary Temperature

Model NO.

H44F4-150LBC

Material

Stainless Steel

Connection Form

Flange

Structure

Swing

Pressure

Ordinary Pressure

Function

Fluoroplastic Disc Single Flexible

Sealing Form

Self-Sealing

Flow Direction

Unidirection

Standard

ANSI

Application

Industrial Usage

Working Temperature

-20~160

Surface

Smooth

Color

Silver

Customized Support

ODM OEM

Transport Package

Solid Wooden Case

Specification

3/4"-12"

Trademark

KaiLong

Origin

Wenzhou, China

HS Code

8481804090

Production Capacity

120, 000 Units/Year

Key features

Excellent Corrosion Resistance: Withstands strong acids, alkalis, salts, and halogens for chemical processing and wastewater treatment.

Superior Sealing Performance: High-precision design ensures zero leakage and system integrity under ordinary pressure.

Customizable Specifications: Available in sizes 1/4"-12" with ODM/OEM support to meet specific drawing requirements.

Global Standard Compliance: Manufactured in compliance with ISO, GB, DIN, and ANSI/ASME standards for diverse applications.

Comprehensive Quality Testing: Includes spark coating detection, lipid solubility tests, and pressure testing for every valve.

Fast Delivery Capability: Standard products delivered in 7-10 days; bulk orders in 15-25 days with extensive inventory.

1-Year Warranty Coverage: Covers stainless steel products for one year, excluding gaskets and easily broken parts.

Company profile

Importers and ExportersPatents AwardedExhibition ExperienceNational Award received

Kailong Fluorine Lined Valve Technology (Zhejiang) Co., Ltd.

Zhejiang, China

Business Type: Manufacturer/FactoryExport Year: 2025-12-25Nearest Port: ningboAverage Response Time: ≤8.49hTerms of Payment: T/T, PayPalInternational Commercial Terms(Incoterms): FOB

AI-Powered supplier vetting

SummaryThe supplier manufactures metal and general equipment products, including fluorine-lined valves, and has multiple machining, molding, and finishing facilities. It reports broad customization and ODM/OEM capabilities, new-product development during the past year, and three production lines. However, quality and service controls are weakly documented: finished products are checked by packing staff, there are no written corrective-action or complaint-handling procedures, and outsourcing lacks a standard operating procedure. The supplier has inventory capability and stated peak- and off-season lead times within 15 workdays, but no overseas service locations, showroom, or warehouse. Financial information is limited to year references, while one national science and technology progress award is reported.

Supplier typeThe supplier is a manufacturer and processor of metal materials, mechanical parts, general equipment, and general components. Its stated product range includes fluorine-lined ball, plug, and butterfly valves, indicating a production-oriented industrial equipment supplier rather than only a trading company.

After-Sales capabilityThe company states that it provides comprehensive after-sales service and has inventory capability, with stated service lead times within 15 workdays in both peak and off-season. However, it has no overseas warehouse or showroom, no overseas service countries reported, and lacks written procedures or records for corrective actions and customer complaint handling.

R&D capabilityThe supplier reports new products during the past year, provides ODM services, and describes a technology- and innovation-oriented business approach. It also reports one national science and technology progress award, although no SDK is available; the evidence supports meaningful innovation activity.

Production capacityProduction resources include CNC and center lathes, drilling, sawing, milling, polishing, injection molding, complete production facilities, three production lines, inventory capability, and stated lead times within 15 workdays. Nevertheless, there is no valid manufacturing-capacity contract with related subcontractors, no continuous quantity reconciliation, and no outsourcing SOP, creating process-control limitations.

Customization capabilityThe supplier explicitly offers customization from samples and designs, full and minor customization, and flexible customization. It also provides ODM services, demonstrating broad stated capability to adapt or develop products for customer requirements.

Product Q&A

Q:Are you a trading company or factory?

We are a manufacturer boasting 12 years of industry experience and holding proprietary import-export rights.

Q:May I request free samples?

Free samples can be provided for first cooperation under sincere cooperation.

Q:What certifications do you have?

We have ISO certification, anti-corrosion pipeline component certificates, and type test certificates. In addition, we own a number of appearance design patents.

Q:How do you control the quality?

Each valve is subjected to strict testing before delivery. From the metallographic inspection of incoming blanks, dimension acceptance during machining, spark leakage testing in the lining process, to the final valve seal performance test. Professional personnel are responsible for each production procedure to ensure the quality of every single valve.

Q:If there is any quality problem, how do you solve it?

We believe that protecting our clients' interests is the cornerstone of our business. While we cannot guarantee 100% perfection, occasional quality issues may still arise. Depending on the specific situation, we typically resolve such cases through replacements, compensation, or resending goods. The specific solution will be discussed and agreed upon with the customer based on the actual circumstances.