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Zhejiang Yinke Valve Co., Ltd.

Certified manufacturing location: Yongjia County, Wenzhou City, Zhejiang Province, China

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Product Range

Fully Welded Ball Valves

Fully Welded Ball Valves minimize body-joint leak paths and are commonly used for gas transmission, buried pipelines and long-term isolation. Compare standard welded, underground and gas-pipeline configurations below.

Design OptionsService ConditionsRFQ Support
Selection Guide

How to choose the right fully welded ball valve design.

Fully welded construction removes bolted body joints from the pressure boundary and is well suited to pipeline systems where long-term integrity and reduced external leak paths are important.

Selection is mainly driven by installation location, stem-extension requirements, pipeline service and access for operation and maintenance.

Selection note

Compare the configurations below, then open the relevant product for detailed design, materials, end connections, testing and RFQ requirements.

large welded body ball valve photographed in YINKE workshop
Large welded-body ball valve photographed before final finishing.
Fully Welded Ball Valve Range

Fully Welded Ball Valve Configurations

Choose by installation location, stem extension, pipeline duty and end-connection requirements.

01 · Product Type

Fully Welded Trunnion Ball Valve

A fully welded trunnion ball valve combines fixed ball support with a permanently welded body shell. This construction reduces external body flange joints and is commonly selected for gas transmission and long-distance pipeline service. End connections may be flanged or butt-weld depending on project design.

Best suited for: Transmission and pipeline isolation where a welded pressure shell and trunnion-supported ball are preferred.
Welded BodyTrunnionPipeline
View Fully Welded Trunnion Ball Valve →
When to choose it

Choose this design when long-term pressure-shell integrity and reduced body joints are stronger priorities than body disassembly.

02 · Product Type

Underground Fully Welded Ball Valve

An underground fully welded ball valve is configured for buried installation with an extended stem, drain/vent extension and project-specific external coating. Burial depth, actuator or gearbox access, cathodic protection interface and coating repair requirements must be defined before manufacture.

Best suited for: Buried pipeline installations requiring stem extension, external coating and above-ground operating access.
Buried ServiceStem ExtensionExternal Coating
View Underground Fully Welded Ball Valve →
When to choose it

Choose this design when the valve body remains buried and the operator interface must be brought above grade.

03 · Product Type

Gas Pipeline Fully Welded Ball Valve

A gas pipeline fully welded ball valve is tailored around transmission duty, often with full bore, low pressure drop, trunnion support, DBB functionality and butt-weld or flanged ends. Stem extension, drain/vent details, coating and actuator selection depend on station or buried installation.

Best suited for: Natural-gas transmission lines requiring full-bore flow, welded-body integrity and long-term sectionalizing service.
Gas TransmissionFull BoreDBB Capability
View Gas Pipeline Fully Welded Ball Valve →
When to choose it

Choose this configuration when the application is specifically gas transmission rather than general industrial welded-body service.

Before You Request a Quote

Information to confirm before requesting a quote.

Select the valve configuration first. Final quotation still depends on the complete datasheet and project specifications.

Which product construction fits the service?
What size and pressure class are required?
What body, trim, seat and seal materials are specified?
RF, RTJ, BW, SW or threaded ends?
Soft seat or metal seat?
Manual, gear, pneumatic, electric or hydraulic operation?
Fire-safe, emissions or sour-service requirements?
Inspection, coating and documentation scope?
FAQ

Fully Welded Ball Valves Selection FAQ

How do I choose between the fully welded ball valves shown on this page?

Start with the application and maintenance strategy. Selection is mainly driven by installation location, stem-extension requirements, pipeline service and access for operation and maintenance. Then confirm size, pressure class, materials, seat design, end connection, actuation and project testing.

Are all fully welded ball valves the same design?

No. The designs share the same valve family but differ in body construction, service condition or installation purpose. Each important configuration has its own technical product information.

What should I send for a fully welded ball valve quotation?

Send valve size and quantity, pressure class, body/trim/seat materials, end connection, design pressure and temperature, media, operation, applicable standards, inspection, coating and documentation requirements.

Manufactured Valve Examples

Manufactured valve examples from this range.

The photos below show representative valves from our workshop. Final configuration is defined by the approved datasheet and project specifications.

Large welded-body ball valve photographed before final finishing.
Large welded-body ball valve photographed before final finishing.
Large-bore ball valves staged in the production workshop.
Large-bore ball valves staged in the production workshop.
Extended-stem ball valves arranged for buried / underground service applications.
Extended-stem ball valves arranged for buried / underground service applications.
Technical Documents & Quality Records

Technical documents for project review.

For technical evaluation, request the applicable product documents and inspection records for the offered valve configuration.

Product Evidence

Product Photos

Additional finished-valve, nameplate and component photos are available for the selected valve configuration.

Request additional product images.
Engineering PDF

GA Drawing / Datasheet

GA drawings and datasheets are prepared for the selected size, pressure class and valve configuration.

Request the applicable GA drawing or datasheet.
Inspection Record

Testing & Inspection Records

Inspection documentation can include pressure testing, dimensional inspection, PMI, NDE/NDT and coating records as required by the project.

Specify the required inspection records in your RFQ.

Send us your ball valve datasheet.

We review valve design, pressure class, materials, seat system, end connection, operation, testing and project documentation before quotation.

Request Technical Review →