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Flanged End Heavy Duty Slow Closing Check Valve for Industrial Water Supply
US$110.00
100 Pieces

Product specifications

DN50

Product profile

Customization

Available

Media

Water

Material

Ductile Iron

Connection Form

Flange

Driving Mode

Manual

Nominal Pressure

Pn16

Channel

Straight Through Type

Structure

Floating Ball Valve

Type

Floating Ball Valve

Function

Water Flow Control

Temperature

Normal Temperature

Standard

OEM,ODM

Application

Industrial Usage

Valve Stem

Stainless Steel

Valve Seat & Valve Disc

Brass

Spring

Stainless Steel

Surface

Epoxy

Transport Package

Wooden Pallet

Specification

DN50-DN350

Trademark

DW

Origin

China

HS Code

8481804090

Production Capacity

50000PCS/Month

Key features

Water Hammer Prevention: Adjustable opening/closing speed reduces surge pressure and ensures quiet operation in high-rise buildings.
Flexible Installation: Can be installed in both horizontal and vertical orientations for versatile pipeline integration.
Durable Material Construction: Made of Ductile Iron with Stainless Steel stem and Brass seat/disc for long-lasting performance.
OEM/ODM Customization: Supports OEM and ODM standards to meet specific industrial requirements and branding needs.
Wide Size Range: Available in DN50 to DN350 sizes to accommodate various industrial water supply pipeline diameters.
Easy On-Site Adjustment: Needle and control valves can be adjusted on-site to optimize flow speed and eliminate water hammer.

Company profile

Ningbo Doway M & E Co., Ltd.
High Repeat Buyers ChoiceR&D CapabilitiesManagement Certification3D Software Design
Business Type: Manufacturer/FactoryExport Year: 2015-06-08Nearest Port: Ningbo, ShanghaiAverage Response Time: ≤7.90hTerms of Payment: LC, T/T, PayPal, etc.International Commercial Terms(Incoterms): FOB, CFR, CIF, EXW

AI-Powered supplier vetting

SummaryThe supplier is identified as a Ningbo-based trading company with professional technical capabilities, including 3D software design, ODM, OEM, and multiple customization options. It reports ISO9001 certification and CE and UL approvals for specified valve products. Production information indicates substantial output across valves, air vents, ferrules, and pipe fittings, supported by 6–10 quality-control staff and broad export coverage, with 90% of sales from exports. Service procedures for corrective actions and complaint handling are documented and followed. However, the supplier has no overseas showroom, agents, branches, offline trade-show participation, overseas warehouse, or in-stock service capability. No new products were reported in the past year, no SDK is available, and financial evidence is limited to stated years without performance details.
Supplier typeThe company is explicitly classified as a trading company located in Haishu District, Ningbo, while also identifying itself as a professional technical supplier with R&D capability. This indicates a trading-oriented supplier with technical and design-service functions rather than evidence of a purely manufacturing company.
CertificationsThe company description states that it passed ISO9001 certification and holds CE approval for ball valves and UL approval for bronze ball valves. These certifications and approvals are explicitly reported, although their scope is limited to the products named.
After-Sales capabilityThe supplier has clear procedures and followed records for corrective and preventive actions and customer complaint handling. However, it reports no overseas agents or branches, no overseas showroom, no overseas warehouse, and no in-stock service capability, so documented complaint processes coexist with limited overseas service infrastructure.
Production capacityReported annual output includes 1,230,000 brass valves, 250,000 bronze valves, 235,000 air vents, 250,000 gunmetal ferrules, and 1,870,000 pipe fittings, supported by 6–10 quality-control staff and access to Ningbo and Shanghai ports. Nevertheless, manufacturing-capacity reconciliation, outsourcing procedures, and contracts are all listed as unknown, preventing a complete assessment of capacity controls.
Customization capabilityThe supplier explicitly offers flexible customization, minor customization, customization from samples and designs, and full customization. It also provides ODM and OEM services, directly supporting broad product-design and customization capability.

Product Q&A

Q:What is the main function of the Model 300X valve?
A:
It regulates the opening and closing speed of water pumps to reduce water hammer and surge pressure, ensuring quiet operation.
Q:Can this valve be installed vertically?
A:
Yes, the Model 300X series check valve can be installed either horizontally or vertically.
Q:What materials are used for the valve components?
A:
The body is Ductile Iron, the stem is Stainless Steel, and the seat and disc are Brass.
Q:How do I adjust the valve to eliminate water hammer?
A:
Slightly close the control valve and/or slightly open the needle valve counterclockwise until the water hammer is eliminated.
Q:What are the available nominal pressure options?
A:
The valve is available in nominal pressures of 1.0 MPa, 1.6 MPa, and 2.5 MPa.

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