How to deal with internal leakage of valve?

Remove the debris on the sealing surface and repair or replace the sealing pair.

What is the problem caused by the inflexibility of valve opening and closing?

First, the executive mechanism failure; Second, there are foreign objects blocked valve plate.

How to solve the valve opening and closing is not flexible?

When the actuator fails, repair or replace the actuator; If foreign objects block, remove foreign objects, and be careful not to damage the sealing surface.

Can the valve actuator adjust itself?

The valve actuator has been debutted before leaving the factory, and non-professional personnel are forbidden to adjust.

Premium Quality Cast Iron Butterfly Valve for DN50-DN3000 Systems

Name: Premium Quality Cast Iron Butterfly Valve for DN50-DN3000 Systems
Brand: HENAN QUANSHUN FLOW CONTROL SCIENCE & TECHNOLOGY CO., LTD.
SKU: 2193313915

Henan, ChinaHENAN QUANSHUN FLOW CONTROL SCIENCE & TECHNOLOGY CO., LTD.

US$500.00

2 Pieces

Product profile

Customization

Available

Media

Water

Driving Mode

Manual

Connection Form

Flange

Structure

Double-Eccentric Sealing

Seal Form

Double Direction Metal Sealing

Valve Stem

Normal

Work Pressure

High Pressure (10.0mpa< Pn <80.0mpa)

Working Temperature

Normal Temperature (-40°C<T<120°C)

Material of Seal Surface

Metal Hard Sealed

Valve Body

Casting

Application

Industrial Usage, Water Circulating System

Enter Attribute Here (e.g.: Size)

Enter Value Here (e.g.: 12 Inches)

Sealing Material

Hard Alloy

Connection Type

Flange and Weld

Operating Type

Manual, Electric or Pneumatic

Transport Package

Polywood Case

Specification

DN50~DN3000

Trademark

QUANSHUN

Origin

Zhengzhou

HS Code

8481804090

Production Capacity

100

Key features

Bidirectional Metal Sealing: Designed with bidirectional sealing structure, installation not restricted by fluid direction.

Self-Sealing Performance: Offers self-sealing device ensuring reliable sealing under medium pressure.

Long Service Life: Features wear compensation mechanism for extended durability and performance.

Particle Crushing Function: Unique rotational structure crushes solid particles during opening and closing.

Wide Size Range: Available in sizes from DN50 to DN3000 (2" to 40") to suit various pipelines.

Multiple Operating Types: Supports manual, electric, or pneumatic operation modes for flexibility.

High Pressure Capability: Rated for high pressure applications up to Class 300 / PN100.

Diverse Material Options: Body materials include WCB, CF8, CF8M, CF3, CF3M with hard alloy sealing.

Company profile

Importers and ExportersHigh Repeat Buyers ChoiceCooperated with Fortune 500

HENAN QUANSHUN FLOW CONTROL SCIENCE & TECHNOLOGY CO., LTD.

Henan, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedExport Year: 1 year CertifiedNearest Port: Qingdao PortAverage Response Time: >24h CertifiedTerms of Payment: LC, T/T, D/P, etc.

AI-Powered supplier vetting

SummaryThe supplier demonstrates broad customization, 3D design, ODM, and OEM capabilities, supported by reported new-product development and one national science and technology progress award. Quality, supplier-service assessment, corrective-action, and complaint-handling procedures are documented and followed. The supplier reports inventory capability, export rights, and multiple accepted trade terms, but has no overseas warehouse or showroom and no valid manufacturing-capacity contract with related subcontractors. Production information identifies one production line, 11–20 quality-control staff, and stated valve outputs. Certification evidence includes ISO9001:2015, ISO45001:2018, ISO14001, and CE. Financial credibility cannot be established because the provided financial fields report zero values for the stated periods. Customer references are not explicitly provided.

Supplier typeThe supplier operates manufacturing equipment including machining, welding, line cutting, and painting facilities; it reports one production line, inventory capability, export rights, and service proximity to Qingdao Port. However, it has no valid manufacturing-capacity contract with related subcontractors and no overseas warehouse or showroom.

CertificationsThe supplier reports ISO9001:2015, ISO45001:2018, and ISO14001 certifications, together with CE and other product-certification capability. These are explicit certification holdings or capabilities in the provided information.

After-Sales capabilityThe company reports technical support and non-traditional after-sales service, while its service-capability procedures, corrective and preventive actions, and customer-complaint handling have written procedures and followed records. This supports a structured after-sales process.

Financial creditThe provided financial records report zero operating revenue, operating cost, gross profit, operating profit, gross margin, and current ratio for the stated periods. These reported figures do not provide positive evidence of financial strength and indicate a material credibility concern.

R&D capabilityThe supplier reports new products within the past year, provides 3D software design and ODM services, supplies OEM services to well-known brands, and holds one national science and technology progress award. It does not have an available SDK, but the broader evidence supports innovation capability.

Production capacityThe supplier identifies machining, welding, line-cutting, and painting equipment, reports 11–20 quality-control staff, one production line, inventory capability, and stated outputs for several valve products. Its lack of a valid manufacturing-capacity contract with related subcontractors limits assurance regarding contracted capacity.

Customization capabilityThe supplier explicitly supports customization from samples, designs, full customization, flexible customization, and minor customization, as well as 3D software design and ODM services. This indicates broad customization coverage across design and manufacturing requirements.