Certification and documentation driven, deep focus on core valve categories, fast response and global delivery
API 6D pipeline ball valves, high-pressure gate and globe valves, triple-offset metal-seated butterfly valves and cryogenic valves, covering Class 150–2500, with bodies in carbon steel, stainless steel, duplex and other materials.
Read More →Custom private label, branding, packaging, nameplates and shipping documentation, supplying overseas brand owners and distributors under their own label, with first article approval (FAI) available.
Read More →Custom materials, end connections, sealing arrangements and operation modes per operating conditions and drawings; small and medium batches and drawing-based inquiries supported, including orders large factories decline.
Read More →Supply of trim, sealing and actuator spare parts, with installation and commissioning guidance, remote technical support and replacement service.
Read More →Ball valves, gate & globe valves, butterfly valves, cryogenic valves and other industrial valves
The triple offset metal-seated butterfly valve uses a three-fold offset — between the seat axis, the disc rotation axis and the sealing cone — so that the disc fully disengages from the metal seat during opening and closing without friction, and contacts the seat only in the final wedge-in phase of closure. The result is metal-to-metal, friction-free and zero-leakage sealing. Hard metal seating (stainless steel / Stellite weld overlay) provides high-temperature resistance, wear resistance and fire safety, with a wide temperature range that can extend to both cryogenic and high-temperature duties. Sealing is reliable and service life is long; the valve can replace gate and ball valves on large-diameter pipelines in some duties. Design basis: API 609, EN 593.
Knife gate valves use a thin, blade-shaped gate. On opening and closing, the knife edge cuts through or scrapes off fibres, particles and slurry adhering to the seat, preventing blockage and jamming — making this the dedicated isolation valve for slurry and solids-laden lines. The body bore is full-port and recess-free so media do not accumulate. The seat can be metal hard-seated or a polyurethane/rubber soft seat, selected to suit the duty. Pneumatic actuators are available for fast cycling. Typical services include mineral slurry in mining, pulp and stock in papermaking, sludge in wastewater treatment and chemical slurries.
The bellows-sealed globe valve places a metal bellows between the stem and the body as the primary seal, completely isolating the medium in the stem movement area from the outside. Together with graphite packing it forms a dual seal that eliminates external leakage at the packing, making it a critical valve for conveying toxic, flammable, volatile and valuable media. The bellows is made of corrosion-resistant materials such as 316L/Inconel and passes helium mass-spectrometer leak testing. Combined with an anti-blowout stem and live-loaded packing, low fugitive emission designs can be supplied to the classification requirements of ISO 15848-1. It is widely used in steam, heat-transfer oil, ammonia, chlorine and hazardous chemical lines.
The flanged butterfly valve has integral flanges at both ends and is bolted to the pipeline flanges, so no wafer clamping is needed during installation. Sealing is more reliable and the installation requires less coaxiality, which makes the valve suitable for large diameters and important lines. The double-flanged construction has good rigidity and can be fitted with electric or pneumatic actuators for remote control. It is widely used in large-diameter water supply and drainage, circulating water, flue gas and air lines, and is the main valve type for shutoff and regulation in large water systems.
Trunnion-mounted ball valves support the ball at both the stem and a bottom trunnion. Line thrust is carried by the trunnion and bearings instead of being transferred to the seats, so operating torque is low, pressure capability is high and large sizes are feasible. This is the mainstream construction for high-pressure, large-diameter pipeline ball valves. The design is full bore with bidirectional sealing and supports double block and bleed (DBB) and double isolation and bleed (DIB). Fire-safe (API 607/6FA) and anti-static (API 6D) features are provided, and the seats accept sealant injection for emergency sealing. End connections are flanged, butt-weld or fully welded; applications include oil and gas transmission pipelines, gathering stations and pigging operations.
Cast steel wedge gate valves use a wedge-shaped gate as the closing member, moving vertically along the seat centreline to shut off flow. When fully open the gate retracts completely out of the bore, so the medium passes straight through and flow resistance is close to zero — the isolation valve with the lowest pressure loss in fully open and fully closed service. The valve has a rising stem (OS&Y) design: the stem rises with the gate and the exposed threads give a clear indication of valve position. Sealing faces can be hardfaced with 13Cr or Stellite carbide for wear and erosion resistance at high temperature and pressure. Suitable media include steam, oil, natural gas and water; typical duties are main isolation in power plants, refineries and transmission pipelines.
The swing check valve uses a disc hinged on the body as the closing member: forward flow pushes the disc open, and on reverse flow the disc falls back onto the seat under the action of the medium and its own weight to seal. The design is simple with low flow resistance, and it is the most widely used type of check valve. Flanged or butt-weld ends are available, with metal-to-metal or soft seating. The valve suits horizontal or vertical installation (flow upward) and is widely used at pump and compressor outlets and on pipelines where reverse flow must be prevented.
The Spring-Loaded Safety Relief Valve uses spring preload to balance the medium pressure. When the system pressure exceeds the set pressure, the disc is lifted and the medium is discharged to relieve the pressure; the valve recloses automatically once the pressure falls to the reseating pressure. It is the final overpressure protection device for pressure vessels and piping systems. Selection is based on set pressure and discharge capacity. Enclosed or open bonnets, metal or soft seats and a lifting lever for manual discharge and testing are available. The design follows ISO 4126 and API 520/526, and the valve is suitable for overpressure protection of steam, gas and liquid media.
Focused on four core categories — API 6D ball valves, high-pressure gate and globe valves, triple-offset butterfly valves and cryogenic valves — with the most complete parameters, materials, standards and certifications in each, rather than competing on low price across the full range.
API 6D / ASME B16.34 design standards, CE/PED 2014/68/EU market-access documentation, EN 10204 3.1·3.2 material certificates, pressure test reports and ITP inspection and test plans, verifiable with each shipment.
Drawing-based customization and small-to-medium batch orders; first response to ordinary inquiries within 4 hours, formal quotation within 24 hours, and a standard lead time of 4–10 weeks for medium- and high-pressure valves.
Shell strength (1.5× rating) and seat tightness tests performed on every unit, with 100% factory pressure testing and test reports supplied with each shipment.
Covering 40+ countries and regions including the Middle East, Russian-speaking markets, Southeast Asia and Latin America, with spare parts supply and remote technical support, adapted to overseas time zones.
Drawing on qualified manufacturing resources in the Wenzhou (Zhejiang) pump and valve cluster — Yongjia, known as "China's Pump and Valve Hometown" — for one-stop OEM/private-label and drawing-based delivery: asset-light and traceable.
Valve selection and supply for oil & gas, refining, power, chemical, water and LNG applications
Valve packages for iron and steel making, rolling mill descaling and mining/mineral processing: knife gate valves, wear-resistant slurry valves and high-pressure descaling valves for solids-laden erosion, scaling and large-diameter transfer.
Valve packages for chlor-alkali, soda ash, phosphate fertiliser, pesticide/dye and polymerisation plants: fluorine-lined and lined butterfly valves, ball valves and diaphragm valves, with corrosion-resistant materials matched to aggressive media.
Valve packages for municipal water supply and drainage, wastewater treatment and desalination: large-diameter butterfly valves, resilient-seated gate valves and check valves with flow and pressure control valves, covering cluster repeat business and the high-value SWRO segment.
See how Vexval valves are applied in oil & gas, refining, power and chemical projects
The project supplied wear-resistant knife gate valves, large-diameter butterfly valves and wear-resistant gate valves for the tailings transport and return water systems of a copper concentrator in South America, for shutoff and isolation of high-density slurry and return water lines.
The project supplied a complete package of lined butterfly valves, lined ball valves and corrosion-resistant globe valves to an integrated chlor-alkali plant in East China, for shutoff and control on brine, hydrochloric acid, sodium hypochlorite and other highly corrosive lines.
The project supplied wafer butterfly valves, dual-plate check valves and flanged gate valves in batches for the expansion of a municipal wastewater treatment plant in North Africa, for aeration, return sludge and effluent lines.
The project replaced large-diameter butterfly valves and ball valves on the primary network (main lines DN800–DN1400) of a city district heating system in northern China, solving internal leakage and excessive operating torque.
The project covered the packaged delivery of API 6D trunnion-mounted ball valves and associated valves for a refinery expansion in the Middle East, across critical points including tank farm isolation, process line isolation and truck and tanker loading arms.
The project replaced valves that had failed in batches on sulfuric acid, acetic acid and organic solvent lines at a fine chemical park in Southeast Asia, including fully lined ball valves, lined butterfly valves and stainless steel globe valves.
Documented, verifiable and repeatable — every order ships with the evidence to prove it.