Does the valve include a check valve function?

Yes, the standard bypass includes a check valve function to prevent liquid from flowing back into the pump body.

What is the nominal diameter range for this product?

The nominal diameter ranges from DN40 to DN500.

Can the bypass size be customized?

Yes, other bypass sizes can be made as required, with the maximum bypass flow rate depending on the maximum Kv value.

Zdm Automatic Recirculation Pump Protection Valve

Name: Zdm Automatic Recirculation Pump Protection Valve
Brand: Goole Valve technology Co., Ltd.
SKU: 2082024205

Zhejiang, ChinaGoole Valve technology Co., Ltd.

US$1.00

1 Piece

Sample price:US$1.00/piece.Request sample

Product profile

Customization

Available

Media

Wog

Temperature

High Temperature

Model NO.

GAZDM

Material

Wcb, Wc6, Wc9, 12crmo, 12crmov, 15CrMo, 15crmov

Connection Form

Welding

Structure

Piston

Pressure

High Pressure

Function

Non Return

Sealing Form

Self Tight Pressure Sealing

Flow Direction

Unidirection

Standard

ANSI

Application

Industrial Usage, Water Industrial Usage

Transport Package

Plywood Case

Trademark

GOOLE, OEM, ODM

Origin

China(Mainland)

HS Code

8481804090

Production Capacity

10000PCS/Year

Key features

Anti-Cavitation Design: Multi-stage depressurization bypass reduces noise and prevents cavitation damage.

High Pressure Resistance: Supports high differential pressure up to 30 MPa for demanding industrial applications.

Automatic Protection: Automatically opens bypass when flow is low to protect pumps from cavitation and instability.

Integrated Functions: Combines flow sensing, recirculation control, depressurization, and check valve in one unit.

Durable Construction: Forged steel body available in carbon steel or stainless steel for longevity.

Wide Size Range: Nominal diameter covers DN40 to DN500 to fit various system requirements.

Flexible Connection: Available in flange and welding connection forms for easy installation.

Customizable Bypass: Other bypass sizes can be made as required to match specific flow needs.

Company profile

Importers and ExportersHigh Repeat Buyers ChoiceYears of Export Experience

Goole Valve technology Co., Ltd.

Zhejiang, China

Business Type: Manufacturer/Factory, Trading CompanyExport Year: 2009-07-09Nearest Port: Ningbo, ShanghaiAverage Response Time: ≤5.03hTerms of Payment: LC, T/T, Western Union, etc.International Commercial Terms(Incoterms): FOB, EXW, CFR, CIF, DAT, DDP, DAP

AI-Powered supplier vetting

SummaryThe supplier manufactures specialized equipment for oil refining and chemical production and also conducts hardware product manufacturing, research and development, sales, and related services. It reports ISO 9001 and ISO 14001 certification, two production lines, six to ten quality-control staff, and six to ten years of total R&D engineer experience. The supplier offers broad customization, OEM, and ODM services, with documented inspection, corrective-action, complaint-handling, and traceability procedures. Export experience is stated as 15 years, with 51%–70% of total sales from exports and self-operated import/export rights. However, it has no overseas agents or branches, warehouses, showrooms, or SDK availability; it also reports no new products in the past year and no valid manufacturing-capacity contract with related subcontractors. Customer cases are not specifically provided.

Supplier typeThe stated business scope includes manufacturing and sales of specialized equipment for oil refining and chemical production, hardware product manufacturing, hardware R&D, and ferrous metal casting. The company description also covers material purchasing, production, inspection, delivery, and after-sales service, indicating a manufacturer with integrated related operations.

CertificationsThe supplier reports holding ISO 9001 and ISO 14001 certifications. These are explicit certifications relevant to quality and environmental management systems.

After-Sales capabilityThe supplier states that its operations include after-sales service and has clear, followed procedures and records for handling customer complaints and corrective and preventive actions. However, it reports no overseas agents or branches and offers overseas services in zero countries, which limits directly evidenced overseas service coverage.

Production capacityThe supplier operates two production lines, maintains six to ten quality-control staff, has in-stock service capacity, and uses documented inspection, supplier assessment, corrective-action, complaint-handling, quality-assurance, and material-traceability procedures. Nevertheless, it reports no valid contract with associated subcontractors for manufacturing capacity, creating a documented weakness in subcontracting governance.

Customization capabilityThe supplier explicitly offers customization from samples, designs, full customization, minor customization, and flexible customization. It also provides OEM services for well-known brands and ODM services, demonstrating broad stated customization and manufacturing-design support.

Product Q&A

Q:What is the main function of the ZDM Automatic Recirculation Pump Protection Valve?

It automatically protects centrifugal pumps from cavitation and instability during low load operation by opening a bypass when flow drops below a preset minimum.

Q:What is the maximum working pressure difference this valve can handle?

The standard bypass supports a maximum working pressure difference of up to 30 MPa.

Q:Does this valve require an external power source or drive method?

No, this valve operates automatically based on sensed main flow and does not have any external drive method.

Q:What materials are available for the valve body?

The valve body is forged and available in carbon steel (A105) or stainless steel (F304), with other materials like Wcb, Wc6, and 15CrMo also listed.

Q:What are the available connection forms for this valve?

The valve is available in flange and welding connection forms.