From aggressive chemical media to high-purity processes, HGZK delivers specialized valve solutions for the most demanding chemical, petrochemical, and pharmaceutical applications worldwide.
Valve Application Photo
Stainless Steel Standard
Lined Valve Options
Chemical Projects
Quality Certified
Chemical processing presents unique challenges: highly corrosive media, extreme temperatures, toxic fluids, and strict purity requirements. HGZK valves are engineered to meet these demands.
Acids, alkalis, chlorides, and organic solvents attack standard valve materials. HGZK offers 316L, Hastelloy C276, Monel, Titanium, and PTFE/PFA lined valves for complete chemical compatibility.
Cryogenic processes at -196degC to high-temperature reactors at 600degC+. Extended bonnet designs prevent packing freeze-up. Graphite/metal bellows seals handle thermal cycling without leakage.
VOC and hazardous chemical emissions must meet ISO 15848 and EPA standards. Live-loaded packing, bellows stem seals, and low-emission gasket designs achieve Class A/BH tightness ratings.
Covering every unit operation from reactor feed to product packaging.
Jacketed valves, reactor drain valves, safety relief systems
Full or partial steam/electric jacketed valves prevent solidification of molten sulfur, polymer, and viscous media. Heated cavity design eliminates cold spots.
Spring-loaded and pilot-operated relief valves for overpressure protection. Hastelloy internals for corrosive reactor media. ASME Section VIII / PED certified.
Flush-bottom tank valves eliminate dead zones in reactor bottoms. Rising stem design with PTFE or flexible graphite packing for complete drainage.
Chemical transfer, loading/unloading, tank isolation, pigging systems
PTFE/PFA lined butterfly valves for corrosive chemical piping. Bubble-tight shutoff with encapsulated disc design. Suitable for acid transfer, caustic, and solvent service.
API 607 fire-safe ball valves with pneumatic fail-safe actuation. Emergency shutoff with fusible link triggers at 100degC for chemical storage tank protection.
Full-bore ball valves for pipeline pigging systems. Quick-opening closure design with pressure interlock safety. Used in polymer and viscous chemical transport lines.
WFI systems, CIP/SIP, sterile processing, API manufacturing
316L stainless steel body with EPDM/PTFE diaphragm. Tri-Clamp/ASME BPE connections. Full drainability, crevice-free design meeting FDA and USP Class VI requirements.
Electropolished surface finish Ra = 0.4uSm. Zero dead-leg design for WFI, purified water, and clean steam. Autoclavable to 135degC for SIP sterilization cycles.
Steam-sterilizable sampling valves for API and biopharma processes. Hermetic PTFE diaphragm ensures no cross-contamination between batches.
Products engineered for chemical compatibility, safety, and long service life under aggressive process conditions.
Full Chemical Resistance - ISO 15848 - TA-Luft Certified
Full-bore and reduced-bore, Class 150/300. PFA encapsulated ball, PTFE chevron stem packing. Anti-blowout stem design.
Wafer/lug body, fully lined disc. PTFE/PFA encapsulated disc for zero media contact with metal. Suitable for acids and solvents.
Full PTFE sleeve design, no body cavities. Quarter-turn operation with self-lubricating PFA sleeve. For HCl, H2SO4, NaOH service.
Hastelloy - Monel - Titanium - 316L Electropolished - ASME BPE
Full Hastelloy body and trim for severe acid and chloride service. Fire-safe design with graphite primary + PTFE secondary seals.
316L electropolished to Ra 0.4um. EPDM/PTFE/Silicone diaphragm options. Tri-Clamp connections for pharma and biotech processes.
316L/Hastelloy construction. Multi-ply bellows rated 10,000 cycles. Zero stem leakage for toxic/lethal chemical service per ISO 15848 Class A.
ATEX Certified - Explosion-Proof - Modbus - Profibus - Foundation Fieldbus
Ex d IIC T4/T6 explosion-proof enclosure. Non-intrusive setup with backlit LCD display. Modbus RTU fieldbus for DCS integration in chemical plants.
Epoxy-coated aluminum or 316 SS body for corrosive atmospheres. SIL 3 certified spring-return fail-safe. NAMUR interface for solenoid mounting.
HART 7 / Profibus PA / FF digital positioners. Auto-calibration and valve signature diagnostics. Predictive maintenance alerts for chemical process control.
Control Valves - Safety Relief - Check Valves - Strainers
Alloy body/trim options for corrosive media. Multi-spring diaphragm actuator with I/P positioner for precise chemical flow/temperature/pressure control.
Spring-loaded and pilot operated, ASME VIII/PED certified. Alloy internals for corrosive media. Full lift at 110% set pressure.
316L/Hastelloy construction with perforated or mesh screen elements. Quick-opening cover for easy cleaning. Protects downstream control valves and instruments.
Stringent quality control ensures chemical compatibility and long-term reliability.
EN 10204 3.1/3.2 certificates with PMI spectral analysis. Positive Material Identification on every pressure-containing component.
Shell test per API 598, seat leakage per FCI 70-2 Class VI. Fugitive emissions testing per ISO 15848-1 with helium mass spectrometer.
Lining integrity tested via spark test at 15kV DC. Adhesion test per ASTM D4541. Complete chemical compatibility matrix for all wetted materials.
Installation supervision, chemical compatibility consulting, maintenance training, and rapid spare parts delivery to minimize plant downtime.
HGZK's expertise extends across oil & gas, power generation, water treatment, mining, and HVAC industries.
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