ZOBAI at a Glance
Section 01
The legal entity, manufacturing scale, portfolio range and contact information required for an initial supplier review.
Entity
Company Identity
Founded: 2010
Company: ZOBAI Valve Co., Ltd.
Registered capital: RMB 50.8 million
Address: No. 793 Jiangnan Road, Shuige Industrial Park, Liandu District, Lishui City, Zhejiang Province, China.
Company: ZOBAI Valve Co., Ltd.
Registered capital: RMB 50.8 million
Address: No. 793 Jiangnan Road, Shuige Industrial Park, Liandu District, Lishui City, Zhejiang Province, China.
Capacity
Manufacturing Scale
Base: 20,046 m²
Production equipment: 40+ sets
Testing and inspection equipment: 20+ sets
Patents: 15 utility model patents and 2 invention patents.
Production equipment: 40+ sets
Testing and inspection equipment: 20+ sets
Patents: 15 utility model patents and 2 invention patents.
Engineering Range
Portfolio Envelope
Nominal size: DN10–DN600
Pressure: 0.6–42 MPa
Temperature: −196°C–570°C
These are company-level portfolio limits. The approved range remains series-, material-, standard- and model-specific.
Pressure: 0.6–42 MPa
Temperature: −196°C–570°C
These are company-level portfolio limits. The approved range remains series-, material-, standard- and model-specific.
Business Scope
Core Positioning
Industrial safety valves and pressure-relief valves for boilers, pressure vessels, pipelines, compressors, LNG/LPG, chemical processing, industrial gas and hygienic process systems.
View Manufacturing Facility →
View Manufacturing Facility →
Company History
Section 02
A focused timeline showing the principal changes in company capability, qualification and international technical support.
2010 — Company Established
ZOBAI began building a specialized product and manufacturing system around industrial safety valves and pressure-relief applications.
2024 — Management Systems Updated
ISO 9001, ISO 14001 and ISO 45001 certificates were issued in August 2024. An EAC declaration was registered in December 2024.
2025 — Qualification Scope Expanded
PED EU type examination, the updated Special Equipment Production License and additional type-test coverage strengthened project qualification.
2026 — Technical Resource Center Expanded
Product, sizing, installation, back-pressure, maintenance, testing and standards content was organized into a connected international engineering resource center.
Explore R&D Milestones →
Explore R&D Milestones →
Manufacturing Base
Section 03
The Lishui facility combines the main production, inspection, testing, warehouse and project-release functions.
Facility and Production Areas
Location: No. 793 Jiangnan Road, Shuige Industrial Park.
Area: 20,046 m².
The base supports incoming inspection, machining, sealing-surface preparation, cleaning, assembly, testing, storage and shipment preparation.
Area: 20,046 m².
The base supports incoming inspection, machining, sealing-surface preparation, cleaning, assembly, testing, storage and shipment preparation.
Machining and Assembly
Machining routes cover bodies, bonnets, nozzles, discs, stems, guides, flanges and accessory interfaces. Product-family-based assembly areas maintain component identity and order-level traceability.
Testing and Final Release
Test activities are selected by valve family, pressure range, medium, specification and ITP. Finished valves are tagged, preserved, matched with reports and drawings, and packed for shipment.
Factory Visits
Scheduled visits can include the production route, selected machinery, assembly controls, testing arrangements, certificates and project-document process.
Schedule a Factory Visit →
Schedule a Factory Visit →
Core Product Scope
Section 04
Seven retained product families cover general industrial, high-pressure, back-pressure-sensitive, hygienic and special-service applications.
Spring-Loaded Safety Valves
Steam, gas, vapor and liquid duties. Typical review band: DN15–DN400, 0.1–32 MPa, −196°C–570°C.
View Family →
View Family →
Pilot-Operated Safety Valves
Selected clean gas and vapor service requiring high pressure, large capacity or close operating margin. Typical review band: DN25–DN300, 0.3–42 MPa.
View Family →
View Family →
Bellows-Balanced Safety Valves
Back-pressure-sensitive and closed-discharge service. Typical review band: DN25–DN300, 0.1–16 MPa.
View Family →
View Family →
Sanitary Safety Valves
Food, beverage, pharmaceutical and clean-utility service. Typical review band: DN15–DN100, 0.05–1.6 MPa.
View Family →
View Family →
Three Product Families
Additional Retained Families
Lever safety valves: lifting-device or functional-check arrangements.
Changeover and dual safety valves: continuous protection during planned maintenance.
Jacketed safety valves: viscous, crystallizing or temperature-sensitive media.
Changeover and dual safety valves: continuous protection during planned maintenance.
Jacketed safety valves: viscous, crystallizing or temperature-sensitive media.
Engineering Rule
Selection Boundary
The stated bands are portfolio-planning ranges. Final size, set pressure, allowable temperature, material, orifice, flange class and certified capacity are confirmed against the selected series and approved datasheet.
Browse All Safety Valve Families →
Browse All Safety Valve Families →
Engineering and R&D
Section 05
Engineering support connects process data, valve architecture, materials, drawings, validation and controlled changes.
Application and Selection Review
Review protected equipment, relief scenario, medium, set pressure, operating pressure, temperature, required capacity, back pressure, connections and document requirements. Select the suitable valve architecture and identify missing inputs.
Sizing, Materials and Drawings
Check relieving area, capacity basis, body and trim materials, seat, spring, bellows, gasket, bolting and flange rating. Prepare or revise datasheets, GA drawings and controlled component drawings.
Prototype, Verification and Change Control
New or modified configurations can require samples, prototypes or validation. Dimensions, materials, set pressure, function, shell strength, tightness and type-test evidence are connected to the approved design.
R&D Assets and Outputs
The portfolio includes 15 utility model patents and 2 invention patents. Typical project outputs include datasheets, sizing review, drawings, material list, test plan, ITP, test reports and final document index.
Meet the Engineering Team →
Meet the Engineering Team →
Manufacturing Equipment
Section 06
More than 40 processing and production machines support standard series and project-specific valve components.
Turning and Machining Centers
CNC lathes process bodies, bonnets, nozzles, discs, stems and guides. Vertical and horizontal machining centers produce flange faces, bolt circles, cavities, ports and accessory interfaces.
Drilling, Threads and Boring
Equipment supports bonnet, vent, drain, pilot, sensing and accessory connections. Metric, BSP, NPT and project-specified threads are produced where released drawings permit.
Grinding, Lapping and Spring Checking
Nozzle and disc sealing surfaces are prepared with controlled grinding and lapping. Project targets can include Ra ≤0.2 μm where design and material support it. Springs are checked for dimensions, load and compression.
Cleaning, Assembly and Audit Records
Valve-focused fixtures, torque tools, cleaning equipment and assembly aids support controlled production. Machine routes, first-piece records, dimensional inspection and tool-control records are available by project or supplier audit.
Request Equipment List →
Request Equipment List →
Testing Laboratory
Section 07
More than 20 professional devices support pressure, leakage, function, material and spring verification.
Pressure and Functional Tests
Set-pressure calibration, reseating / blowdown review, hydrostatic shell testing, pneumatic tightness and pilot functional testing are selected according to valve type and approved procedure.
Seat Leakage and Tightness
Metal-seat and soft-seat leakage are checked under the specified medium, pressure and acceptance method, including API 527 or project-specific criteria where required.
Material and Spring Inspection
Spectroscopic analysis / PMI, hardness, dimensions, ultrasonic thickness and spring load / travel checks support specified pressure-retaining, trim and critical components.
Range and Special Validation
The company portfolio reaches 42 MPa and −196°C–570°C, subject to model, fixture and test arrangement. Selected cryogenic or elevated-temperature validation can be planned. Helium leak testing is arranged through a qualified external laboratory when specified.
Review Test Capabilities →
Review Test Capabilities →
Quality System
Section 08
A seven-stage quality chain links technical review, material control, production, testing and document release.
1–2: Technical Review and Incoming Control
Technical review: confirm relief data, selected series, standards, ITP and documentation.
Incoming control: check certificates, heat / batch identity, dimensions, purchased parts, springs, bellows, seals and bolting.
Incoming control: check certificates, heat / batch identity, dimensions, purchased parts, springs, bellows, seals and bolting.
3–4: Machining and Critical Components
Machining: released drawings, route cards, first-piece verification and in-process measurement.
Critical components: nozzle, disc, stem, guide, spring, bellows, pilot parts, seats and pressure-retaining parts.
Critical components: nozzle, disc, stem, guide, spring, bellows, pilot parts, seats and pressure-retaining parts.
5–7: Assembly, Testing and Release
Assembly: identity, cleanliness, matching, torque and sign-off.
Testing: approved pressure, function and leakage checks.
Release: nameplate, reports, certificates, drawings, packing and document index.
Testing: approved pressure, function and leakage checks.
Release: nameplate, reports, certificates, drawings, packing and document index.
Management Systems and Traceability
ISO 9001, ISO 14001 and ISO 45001 support the operating framework. NCR/CAPA controls close nonconformities before release. Model, size, set pressure, materials, heat / batch data, tests, nameplate and shipment documents are linked at order level.
View the Quality Process →
View the Quality Process →
Patents and Certifications
Section 09
Core approvals are presented with certificate numbers, validity and a clear distinction between system and product scope.
Special Equipment Production License
Number: TSF733062-2028
Status: valid through 13 May 2028; updated 8 September 2025.
Status: valid through 13 May 2028; updated 8 September 2025.
ISO 9001
Number: 033924Q
Validity: 13 August 2024 – 12 August 2027.
Scope: design, manufacture and sales of safety valves.
Validity: 13 August 2024 – 12 August 2027.
Scope: design, manufacture and sales of safety valves.
PED EU Type Examination
Number: ECM PED-Bp 2025-DQ68
Validity: 7 May 2025 – 6 May 2030.
Scope: listed pressure safety valve models.
Validity: 7 May 2025 – 6 May 2030.
Scope: listed pressure safety valve models.
EAC Declaration
Number: EAЭС N RU Д-CN.РА11.В.83415/24
Validity: through 26 December 2029 for listed valve series.
Validity: through 26 December 2029 for listed valve series.
Patents and Type Tests
Patents: 15 utility model patents and 2 invention patents.
2025 type-test coverage: conventional spring-loaded, pilot-operated, cryogenic spring-loaded and high-temperature/high-pressure steam safety valves.
2025 type-test coverage: conventional spring-loaded, pilot-operated, cryogenic spring-loaded and high-temperature/high-pressure steam safety valves.
Scope Rule
ISO management-system certificates are not product approvals. PED, EAC and type-test documents apply only to the listed legal entity, models, materials, sizes, pressure bands and validity on the original certificate.
Verify Certificates →
Verify Certificates →
Markets and Customers
Section 10
ZOBAI supports OEM, EPC, distribution and plant-maintenance requirements across major industrial regions.
Regional Coverage
China and East Asia: boilers, pressure equipment, chemical processing and industrial gas.
Southeast Asia: OEM equipment, food processing, utilities and LNG/LPG.
Middle East: oil and gas, refinery, petrochemical, compressor and skid packages.
Southeast Asia: OEM equipment, food processing, utilities and LNG/LPG.
Middle East: oil and gas, refinery, petrochemical, compressor and skid packages.
Additional Export Regions
Europe: PED-oriented enquiries, EN / DIN connections and industrial equipment.
CIS and Eurasia: EAC-referenced series, energy and chemical projects.
South America and other markets: distributors, OEMs, projects and replacement supply.
CIS and Eurasia: EAC-referenced series, energy and chemical projects.
South America and other markets: distributors, OEMs, projects and replacement supply.
Customer Types
OEMs and package builders: drawings, tagging, testing and document packages.
EPC and procurement: clarification, material review, ITP and delivery coordination.
Distributors and plants: model matching, replacements, calibration and maintenance support.
EPC and procurement: clarification, material review, ITP and delivery coordination.
Distributors and plants: model matching, replacements, calibration and maintenance support.
Typical Industries
Oil and gas, chemical and petrochemical processing, boilers and pressure vessels, LNG/LPG, industrial gas, compressors, pharmaceuticals, food and beverage, shipbuilding, HVAC and general industry.
View Project Cases →
View Project Cases →
Management and Engineering Team
Section 11
Each project is supported by defined owners for commercial, engineering, manufacturing, quality, testing and documents.
Management and Product Design
General management owns legal information, policy, investment and supplier qualification.
Product design owns architecture, drawings, components, prototypes, validation and engineering changes.
Product design owns architecture, drawings, components, prototypes, validation and engineering changes.
Application and Manufacturing Engineering
Application engineering reviews process data, sizing inputs, back pressure, materials and connections.
Manufacturing engineering converts released designs into machining, lapping, cleaning, assembly and inspection routes.
Manufacturing engineering converts released designs into machining, lapping, cleaning, assembly and inspection routes.
Quality, Testing and Document Control
Quality owns ITP, incoming inspection, traceability, NCR/CAPA and release.
Testing owns methods, equipment, fixtures, calibration and report review.
Document control owns revision status and final transmittals.
Testing owns methods, equipment, fixtures, calibration and report review.
Document control owns revision status and final transmittals.
International Project Support
A named technical and commercial contact is assigned for active projects. The team coordinates quotation data, customer communication, inspection scheduling, packing, shipping documents and follow-up.
Meet the Team →
Meet the Team →
Factory Gallery
Section 12
A limited, performance-friendly gallery presents the facility, public company activity and representative product families.
Manufacturing Base
The Lishui site integrates production, testing, warehouse and project release.
Industry Exhibition
Product and technical communication with valve, pump, pipeline, EPC and equipment visitors.
Spring-Loaded Valve
Representative full-lift valve for high-temperature and high-pressure steam service.
Pilot-Operated Valve
Main valve and pilot arrangement for selected clean-gas and high-pressure duty.
Bellows-Balanced Valve
Representative configuration for back-pressure-sensitive service.
Sanitary Valve
Stainless steel safety valve for hygienic vessels and clean-utility lines.
More Factory and Test Media
Process-specific machinery, assembly, testing and inspection media remain on the Manufacturing and Testing pages so this About page stays fast and focused.
Watch Factory and Test Videos →
Watch Factory and Test Videos →
Contact and Visit Information
Section 13
Direct contact, complete factory address, visit preparation and engineering-RFQ requirements.
Company Contact
ZOBAI Valve Co., Ltd.
No. 793 Jiangnan Road, Shuige Industrial Park, Liandu District, Lishui City, Zhejiang Province, China.
Email: sales@zobai.com
Mobile / WhatsApp: +86 152 6879 3880
Office: +86 578 8880668 / +86 578 8880669
Hours: Mon–Sat, 08:30–17:30 UTC+8.
No. 793 Jiangnan Road, Shuige Industrial Park, Liandu District, Lishui City, Zhejiang Province, China.
Email: sales@zobai.com
Mobile / WhatsApp: +86 152 6879 3880
Office: +86 578 8880668 / +86 578 8880669
Hours: Mon–Sat, 08:30–17:30 UTC+8.
Schedule a Factory Visit
Provide visitor names, company, preferred date, purpose and product or project reference. The visit can include production, testing, certificate review and technical discussion.
Schedule Visit →
Schedule Visit →
Request an Engineering Review
Send the relief scenario, medium, pressure, temperature, capacity, back pressure, connections, materials, quantity, destination and document requirements.
Upload Datasheet →
Upload Datasheet →
Fast-Track Quotation
Attach the existing valve nameplate, datasheet, GA drawing or process specification. ZOBAI will identify missing data and recommend the next technical-review step.