Válvula Geral
Diâmetro Nominal：2″~36″(DN50-DN900）
Pressão Nominal：Class150-Class900
Temperatura máxima de operação：-45℃~650℃
Material da concha：WCB、A105、LF2、F304、F316、F304L、F316L、F51、WCB、LCB、WCC、CF8、CF8M、CF3、CF3M、A890 4A、Inconel，etc
Padrões de projeto：API 599, API 6D, ASME B16.34, API 598, ASME B16.10
ConexãoFlange ou soldagem
Drive Mode：Manual, Electric, Pneumatic, Hydraulic, Lever, Gearbox
Campo de aplicação:Jet Fuel, Crude Oil, Light Oil, Natural Gas (NG), LPG, Coal Gas, Chemical Media, etc. Used in Oil & Gas, Petrochemical, Pharmaceutical, Fertilizer, Power industries
Válvula Geral
Definição do produto e missão de segurança:
General Valve is core industrial equipment for safe control of demanding media in oil, petrochemical, and storage systems. It overcomes internal/external leaks, fire risks, and environmental stresses during transport and handling of hazardous media. JH general valves utilize high-standard materials and structural engineering, covering conditions from cryogenic LNG to high-temperature heavy oil. These valves strictly adhere to API and ASME standards, serving as the cornerstone for safe, efficient, long-term operation of refineries, pipelines, and terminals.
JH General Valve Technology Core:
- Full pressure coverage: Design ratings from Class 150 to Class 2500 (ASME B16.34).
- Fire safety certification: Soft-seal valves pass API 607 / API 6FA fire tests.
- Low temp & corrosion protection: Materials meet NACE MR0175 / ISO 15156 sulfur resistance;Cryogenic valves rated to -196℃.
- International standards compliance: Design, manufacturing, and testing meet API 6D, API 600, API 602, and others.
- Análise Técnica do Produto
- Fire-Retardant Oil Products
- Cryogenic & Ultra-Low Temperature
- Pipelines & Large-Diameter Pipelines
General Valve’s core technology lies in its in-depth application of materials and sealing mechanics for specific media conditions. For oil products, the focus is on fire resistance, antistatic properties, and sulfur corrosion resistance, utilizing the high-temperature characteristics of materials to ensure seal integrity under extreme conditions. For cryogenic conditions, the core is controlling material phase transformation and thermal stress, ensuring toughness at extreme low temperatures through meticulous heat treatment. Pipeline valves emphasize structural mechanics and long-life seals, employing finite element analysis to optimize stress distribution. All designs begin with failure mode analysis and undergo rigorous API type testing verification, their “versatility” built upon the highest industrial safety and reliability benchmarks.
This subclass of valves integrates a dual sealing system and is specifically designed for fire-risk areas, refinery units, and oil loading/unloading areas.
Processos principais:
▌Dual sealing system → Primary soft seal + Secondary metal/graphite emergency seal | Compliant with API 607 standard, maintains shutdown even after fire.
▌ Anti-static design → Ensures continuous conductivity between the ball, valve stem and valve body, with a resistance of < 10⁶ Ω (ISO 8031) | Eliminates the risk of static electricity ignition.
▌ Sulfur-resistant and corrosion-resistant materials → Main components are made of materials such as ASTM A351 CF8M, with a hardness ≤ 22 HRC (NACE requirement) | Suitable for media containing hydrogen sulfide.
▌ High-standard certification → Optional functional safety certification conforming to SIL 2/3 level.
This valve is specifically designed for cryogenic media such as LNG and cryogenic storage and transportation scenarios, with deeply optimized materials and structure.
Processos principais:
▌ Cryogenic Material Treatment → Pressure-bearing components undergo cryogenic treatment to ensure a Charpy impact energy ≥41J at -196℃ | Preventing low-temperature brittle fracture.
▌ Extended neck bonnet design → Compliant with BS 6364 standard, keeping the stuffing box away from the cryogenic flow path | Maintaining packing elasticity and preventing leakage.
▌ Vacuum insulation optional → Vacuum jacketed valve body available | Reduces external heat transfer and lowers evaporation loss.
▌ Zero-leakage sealing system → Employs low-temperature flexible graphite/PTFE composite filler | Adaptable to severe temperature cycling.
This valve is designed for high-pressure, large-diameter pipeline applications, emphasizing strength and zero maintenance, and is suitable for long-distance pipelines, dock loading arms, and other scenarios.
Processos principais:
▌ Full bore, fully welded → Butt welds conform to ASME B16.25, valve body welds are 100% RT inspected | Meets pigging requirements, no external leakage.
▌ Dual Blocking and Emission → Features DBB function and a standard grease inlet | Allows for safe verification of seat seals and online maintenance.
▌ High-pressure self-tightening seal → Adopts pressure-reinforced valve seat design | The higher the medium pressure, the greater the sealing specific pressure, ensuring absolute high-pressure sealing.
▌ Remote Automation Ready → Standard ISO 5211 drive flange, compatible with various actuators | Meets the remote control requirements of SCADA systems.
Design principal e vantagens
- Fire safety assurance: Passes API 607 fire test → Secondary seals remain functional after a fire | Provides ultimate safety assurance for high-risk areas.
- Full range of materials: offering a full range of materials from WCB to Inconel, compliant with NACE MR0175 | Overcoming the challenge of compatibility with highly corrosive media.
- High-pressure zero-leakage seal: Utilizing advanced principles such as pressure self-tightening valve seats → Achieving API 598 zero leakage under Class 1500 high pressure | Eliminating internal leakage of high-pressure media.
- Extreme temperature adaptability: Covering a range of -196℃ to +550℃ | Meeting the needs of the entire industry chain from LNG to high-temperature cracking.
- Pipeline-level strength life: Valve body designed according to ASME B16.34, 100% inspection of critical welds | meets design life requirements of more than 40 years.
- Intelligent integration: Standardized driver interface and intelligent sensor interface are standard | Easily integrate into industrial IoT systems.
- Global Standard Certifications: The manufacturing system is API Q1 certified and holds global certifications such as CE/PED, ensuring product compliance in global projects.
Outros produtos
FAQ-General Valve
General valves are standardized valve products widely used in industrial piping systems to control fluid isolation, regulation, flow direction switching, and pressure protection. The main types of general valves include:
Válvula de gaveta: Used for full open or full close isolation, low flow resistance
Globe Valve: Used for flow regulation and isolation, excellent sealing performance
Válvula de esfera: 90° quarter-turn operation, rapid opening/closing, reliable sealing
Válvula borboleta: Compact structure, suitable for large-diameter pipelines
Check Valve: Prevents backflow, automatic operation
Válvula de plugue: Simple construction, suitable for viscous media
Safety Valve: Overpressure protection, automatic pressure relief
Valve type selection should consider the following factors:
| Tipo de válvula | Função principal | Resistência ao fluxo | Vedação | Aplicações |
|---|---|---|---|---|
| Válvula de gaveta | Isolation | Muito baixo | Bom | Abertura/fechamento completo, operação pouco frequente |
| Válvula globo | Regulation/Isolation | Mais alto | Excelente | Flow regulation, frequent operation |
| Válvula de esfera | Isolation | Muito baixo | Excelente | Quick operation, tight shut-off |
| Válvula borboleta | Isolation/Regulation | Baixo | Bom | Large diameter, space-limited |
| Válvula de retenção | Backflow Prevention | Low-Medium | Bom | Pump discharge, backflow prevention |
| Válvula de plugue | Isolation/Diversion | Muito baixo | Bom | Viscous media, multi-port control |
Selection Principles:
Regulação do fluxo: Select globe valve, control valve, butterfly valve
Operação rápida: Select ball valve, butterfly valve, plug valve
Low Flow Resistance: Select gate valve, ball valve, plug valve
Tight Shut-Off: Select ball valve, globe valve
Backflow Prevention: Select check valve
Our general valves are designed and manufactured in strict compliance with international standards and codes, holding major certifications including API, ISO, CE, ABS, BV e CCS. Different valve types also comply with corresponding industry standards:
Gate, Globe, Check Valves: Cumprir com API 600 / BS 1873 / API 602 / API 603
Válvulas de esfera: Cumprir com API 608 / API 6D / ISO 17292
Válvulas borboleta: Cumprir com API 609 / ISO 5752
Válvulas de plugue: Cumprir com API 599 / API 6D
Segurança contra incêndio: Cumprir com API 607 / ISO 10497
Emissões Fugitivas: Cumprir com ISO 15848 / API 624
These certifications ensure compliance and reliability for applications in oil, gas, chemical, power, and marine industries.
Material selection depends on media characteristics, temperature, pressure, and corrosiveness:
| Tipo de mídia | Material do corpo | Material de acabamento | Material de vedação |
|---|---|---|---|
| Water, Steam, Oil | Cast Steel (WCB), Ductile Iron | 13%Cr, 304SS | PTFE, 13%Cr, Stellite |
| Água do mar | Bronze, Nickel-Aluminum Bronze, Duplex, 316L | Duplex, 316L, Monel | PTFE, EPDM, NBR |
| Meios Corrosivos | 316L, 317L, Duplex, Hastelloy | 316L, Hastelloy | PTFE, PFA, FKM |
| Cryogenic (LNG) | 304/316L, Low-Temp Steel | 304/316L | PCTFE, PTFE |
| Alta temperatura | Cr-Mo Steel (WC6/WC9), 321 | Stellite, Inconel | Graphite, Metal Seated |
| Media with Particles | Cast Steel, Wear-Resistant Alloy | Stellite, Ceramic | Metal Seated, Hardfaced |
General installation points for valves:
Confirmação da direção do fluxo: Siga rigorosamente o seta de direção do fluxo marked on the valve body; check valves, globe valves, and some ball valves have specific flow direction requirements
Local de instalação: Ensure valves are installed in Locais de fácil acesso para operação e manutenção., with sufficient space for handwheel or actuator
Limpeza de dutos: Thoroughly purge pipelines before installation to remove weld slag, metal chips, and other debris
Alinhamento adequado: Garantir alinhamento preciso entre a válvula e os flanges da tubulação para evitar falhas de vedação devido ao desalinhamento.
Aperto dos parafusos: Aperte os parafusos uniformemente em um padrão cruzado para evitar compressão excessiva localizada
Proteção durante a soldagem: If pipeline welding is required, complete it before valve installation to prevent heat damage to seals
Support Protection: For large-diameter valves, provide independent pipeline support to prevent valves from bearing pipe weight
Falhas comuns e contramedidas:
| Falha | Possíveis causas | Prevenção | Solução |
|---|---|---|---|
| Vazamento externo | Worn packing, body cracks, flange seal failure | Regular inspection, avoid over-tightening | Tighten/replace packing, repair body, replace gasket |
| Vazamento interno | Superfícies de vedação desgastadas, obstrução por objeto estranho, torque insuficiente do atuador | Instalar filtro, inspeção regular | Lap sealing surfaces, clear obstructions, adjust actuator |
| Operação Colagem | Bent stem, poor lubrication, media crystallization | Regular operation, regular lubrication | Straighten/replace stem, clean and lubricate, clean cavity |
| Falha no atuador | Air/electrical supply issues, spring failure, positioner fault | Verificação regular do fornecimento de energia, testes de funcionamento. | Repair actuator, replace springs, calibrate positioner |
Valve maintenance points and recommended schedule:
| Maintenance Item | Recommended Frequency | Maintenance Content |
|---|---|---|
| Inspeção visual | Mensal | Inspect body, flanges, connections for corrosion, leakage, damage |
| Operation Test | Mensal | Open/close valve, check for smooth operation and proper travel |
| Sealing Verification | Trimestral | Check for internal leakage in closed position |
| Packing Tightening | Semi-annually | Inspect packing gland for leakage; tighten or replace packing as needed |
| Lubrificação | Semi-annually | Apply lubricant to stem, gearbox, grease fittings |
| Actuator Inspection | Semi-annually | Check air/electrical supply, signal feedback, spring condition |
| Overhaul | Annually or as needed | Disassemble for inspection, lap sealing surfaces, replace worn parts |
To ensure accurate selection, please provide the following key parameters:
Parâmetros básicos: Size (DN/NPS), Pressure Rating (PN/Class), Valve Type
Tipo de conexão: Flanged (standard & face type), butt weld, threaded, wafer
Método de operação: Manual (handwheel/lever), gear operated, pneumatic, electric, hydraulic
Requisitos de materiais: Body, bonnet, trim, sealing surface materials
Informações para a imprensa: Nome do meio, temperatura, pressão, corrosividade, presença de partículas, viscosidade
Requisitos de fluxo: Maximum/normal/minimum flow rate, allowable pressure drop
Classe de vazamento: Specify leakage class if tight shut-off is required
Requisitos especiais: Fire-safe certification, fugitive emissions, explosion-proof rating, classification society requirements, special coating, certification needs