About HHSV
A Safety-Valve Manufacturer Built Around Engineering
HHSV (Henghua Valve Co., Ltd.) was founded in 1998 in Wenzhou, China. The company manufactures safety and pressure-relief valves and supports selection, sizing, material configuration, testing and technical-document delivery.
1998
Company founded
≈15,500 m²
Facility area
260+
Employees
180+
Production machines
8,000 t
Reported annual capacity
10,000+
Valve sets per month
Company Scope
One manufacturer, focused here on safety valves.
HHSV supplies conventional, balanced-bellows, pilot-operated, direct spring-loaded, impulse and main safety-valve designs for steam, gas, liquid, corrosive and toxic service. Each application remains subject to service-data review and the applicable certificate scope.
Engineering input
Medium, capacity, operating and set pressure, temperature, backpressure, connections, materials and required compliance.
Engineering output
Selection and sizing, datasheets, calculations, drawings, deviations, testing scope and document index.
Primary buyers
Distributors, EPCs, OEMs, equipment integrators and industrial end users.
Machining operations · Wenzhou
Product Envelope
Safety and pressure-relief valves for defined service conditions.
Published manufacturing range: DN10–600 (½–24 in), 0.6–42 MPa or ASME Class 150–2500, and −196–570°C. Available valve-body materials include carbon steel, low-temperature steel, chrome-moly steel, stainless steel, duplex stainless steel, Monel and Hastelloy.
Products may be designed to applicable requirements of ISO 4126, API 520/526/527, ASME Sections I and VIII, ASME B16.5, GB/T, DIN and JIS. Design basis, test basis and certification status must be stated separately for each supplied product.
Nominal size
DN10–600
½–24 in
Pressure envelope
0.6–42 MPa
Class 150–2500
Temperature
−196°C to 570°C
Manufacturing System
Facilities organized around repeatable production.
Machining, assembly, inspection, testing and documentation are treated as linked manufacturing stages rather than separate claims.
Machining capacity for repeatable valve components
Controlled machining operations
Surface preparation and coating
01
Material control
Review material specifications, heat numbers and required inspection records.
02
Machining
Machine pressure-containing and functional components to controlled drawings.
03
Assembly
Control springs, trim, seals, settings and serial-number identification.
04
Performance testing
Verify shell integrity, set pressure, reseating and seat leakage as specified.
05
Document release
Compile material, test, conformity and shipping records into the delivery package.
People and Roles
A 260+ person manufacturing organization.
HHSV’s workforce covers engineering, production, QA/QC, testing, technical documentation, project coordination and sales. The operating model is intended to carry an enquiry from incomplete service data through technical approval, manufacturing, inspection and shipment.
For overseas projects, the practical interfaces are the application engineer, project sales contact, quality/document coordinator and inspection team.
01
Application engineering
Checks service data, calculation assumptions, materials, configuration and applicable standards.
02
Production
Controls machining, assembly, settings and repeatable batch manufacture.
03
Quality and testing
Manages traceability, inspection status, pressure testing and third-party witness points.
04
Projects and documents
Coordinates drawings, QAP/ITP, MDR records, revisions, milestones and final delivery files.
R&D and Verification
Material, NDT and full-performance testing capability.
HHSV reports material and nondestructive-testing laboratories together with equipment for safety-valve performance verification. Test and inspection scope is defined by the product, service, standard and purchase order.
Available verification work includes material composition and mechanical-property checks, hardness testing, nondestructive examination, dimensional inspection, shell testing, set-pressure and reseating checks, and seat-leakage testing.
Material verification
Heat-number traceability, material certificates and specified chemical or mechanical checks.
Nondestructive testing
Applicable surface or volumetric examinations according to the agreed inspection plan.
Pressure performance
Shell integrity, set pressure, reseating behaviour and capacity-related verification.
Seat leakage
API 527 or other agreed leakage criteria, with recorded results and witness options.
Company Development
Growth described by capability, not slogans.
Only the founding year is presented as a dated milestone here; later phases summarize documented capability development without inventing unsupported dates.
1998
Henghua established
The company began valve manufacturing operations in Wenzhou, Zhejiang, China.
Manufacturing development
Machining and production expansion
Facilities developed to include machining, assembly, material inspection and valve testing operations.
International compliance
Certification and documentation systems
Quality, environmental, occupational, CE/PED, ASME UV and National Board capabilities were developed for applicable scopes.
Current operating model
Engineered B2B supply
HHSV supports project and recurring orders with sizing, testing, traceability and English technical-document packages.
Identity and Accountability
Manufacturing entity, websites and certificates must align.
HHSV is the operating identity used here for Henghua Valve Co., Ltd. Tiansheng Valve Group and tsv-valve.com are independent websites operated by HHSV.
A website or commercial name does not expand a certificate. Product pages and quotations should always identify which legal entity manufactures, contracts, marks and warrants the supplied valve.
Manufacturing identity
HHSV · Henghua Valve Co., Ltd.
Operating location
Wenzhou, Zhejiang Province, China
Related websites
Tiansheng Valve Group and tsv-valve.com are independent websites operated by HHSV.
Certification references
ISO 9001, ISO 14001, ISO 45001, CE/PED, ASME UV, National Board authorization and Chinese safety-valve manufacturing licensing, within their stated scopes.
Compliance rule: “Certified to,” “tested in accordance with” and “designed in accordance with” are separate statements. Certification claims must match the legal entity, factory, model, pressure range and nameplate.
Verify Capability
Review the factory, quality system and certificate scope.
Use the manufacturing, testing and certification pages to evaluate HHSV before sending service conditions or a project specification.