What is the minimum order quantity (MOQ)?

The minimum order quantity is 500 pieces.

What are the available payment terms?

We accept LC, T/T, D/P, PayPal, Western Union, and Small-amount payment.

What is the average lead time for production?

The average lead time is within 15 workdays for both peak and off-season periods.

Flanged Backflow Prevention Valve for Drinking Water

Name: Flanged Backflow Prevention Valve for Drinking Water
Brand: Shanghai Zentif Valve Group Co., Ltd.
SKU: 2003236551

Shanghai, ChinaShanghai Zentif Valve Group Co., Ltd.

US$30.00-60.00

5 Pieces

Sample price:US$200.00/piece.Request sample

Product profile

Customization

Available

Media

Water

Temperature

Ordinary Temperature

Model NO.

LHS743X

Material

Cast Iron

Connection Form

Flange

Structure

Double Check with Relief Valve

Pressure

Ordinary Pressure

Function

Backflow Prevention and Water Supply Isolation

Sealing Form

Soft Sealing

Flow Direction

Unidirection

Standard

Application

Water Industrial Usage

Product Name

Low-Resistance Backflow Preventer

Model

Lhs743X

Valve Type

Backflow Preventer

Nominal Diametre

DN50-300

Nominal Pressure

Pn10-16

Working Temperature

0℃ ~ 80℃

Valve Body

Ductile Iron

Internal Component

Stainless Steel

Advantages-01

High Safety Backflow Protection

Advantages-02

Prevents Contamination & Water Hammer

Certification

GS, CE, ISO9001

Transport Package

Seaworthy Wooden Case

Specification

DN50-DN300

Trademark

Zentif

Origin

China

HS Code

8421199090

Production Capacity

50000

Key features

Dual-Check Safety Design: Two independent check valves with a differential-pressure relief valve for redundant backflow protection.

Energy Efficient Flow: Streamlined passage and low flow resistance minimize head loss and boost system energy efficiency.

Durable Material Construction: Ductile iron body with stainless steel seats, stems, and springs for strength and corrosion resistance.

Automatic Contamination Prevention: Automatically drains the middle chamber to create an air gap, preventing back-siphonage and pollution.

Wide Application Scope: Suitable for municipal water, fire protection, HVAC, residential services, and landscape irrigation.

Hydraulic Operation: Operates via hydraulic pressure changes without requiring any external energy source.

Reliable Sealing: NBR or EPDM sealing rings ensure dependable shut-off and prevent leaks under pressure.

Certified Quality: ISO-certified with GS, CE, and ISO9001 certifications ensuring high safety and compliance standards.

Company profile

Importers and ExportersHigh Repeat Buyers ChoiceIn-stock CapacityFast Delivery

Shanghai Zentif Valve Group Co., Ltd.

Shanghai, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Designs CertifiedExport Year: N/A CertifiedNearest Port: Shanghai PortAverage Response Time: ≤2.15h

About Our Factory & Business Background

AddressNo. 111 Huangjia Garden Road, Jiangqiao Town, Jiading District, Shanghai, China

Plant Area12819.22 square meters

Number of Employees81

Registered Capital55,484,089 RMB

Terms of PaymentLC, T/T, D/P, PayPal, Western Union, Small-amount payment

International Commercial Terms(Incoterms)FOB, CIF, CFR, EXW

Average Lead TimePeak Season Lead Time: within 15 workdays Off Season Lead Time: within 15 workdays

Minimum Order Quantity500 PICS

Supply Chain Partners12

Our Production Capability & Technical Expertise

Main Productsangle valve

Production Lines5

Production MachinesCNC Lathe, Lathe, Shot Blasting Facility, Vertical Lathe

QA/QC inspectors3 people

Inspection Type for Finished Products100% inspection(Visual inspection & Function inspection)

Inspection Method for Finished ProductsHave instructions and uniformly followed

R&D Engineers2 people

Traceability of Raw MaterialsYes

Our Industry Experience & Global Business Record

Year of Establishment2001-03-20

Main MarketsDomestic

Repeat Buyers Choice50%~80%

Number of Foreign Trading Staff4

Overseas Agent/BranchNo

New Products Launched in Last yearNo

Our Certifications, Standards & Industry Recognition

Cooperated with Fortune 500No

Product Q&A

Q:How to select the right backflow preventer for water systems?

For potable systems, RPZ preventers suit high-risk. Assess size, pressure, hazard level. Double check valves fit lower risk; RPZ offers top protection.

Q:Why are backflow preventers vital in municipal and building systems?

Backflow preventers safeguard drinking water from contamination by back pressure or siphonage. Required by municipal codes and high-rise buildings, they ensure public health and prevent cross-connection risks.

Q:Can backflow preventers be used in fire protection systems?

Yes. Specialized backflow preventers for fire systems block non-potable water from re-entering the municipal supply, ensuring safety and compliance with fire and water standards.

Q:How do backflow preventers improve safety in HVAC and industrial water systems?

Backflow preventers protect chilled, heating, and process water systems from reverse flow contamination, maintaining water quality, preventing equipment corrosion, and ensuring compliance with health and safety regulations.

Q:What is the warranty period?

We provide a comprehensive 2-year warranty for all our mechanical equipment.