Van kiểm tra oxy (hai đĩa)
Đường kính danh nghĩa：1/2”-20”(DN15-DN500）
Áp suất danh nghĩa：Cấp 150-Cấp 2500 (1.0MPa-32MPa)
Nhiệt độ hoạt động tối đa425℃
Vật liệu vỏ：WCB, WCC, F304, F316, F316L, Monel K500, Inconel 718,CF8, CF3, CF3M,N06625A105CW6MC, CY40, M35-1,N10276，CF8M
Tiêu chuẩn thiết kế：API 6D, ASME B16.34,EN 12334,DIN 3840,JIS B2074
Sự liên quanMặt bích hoặc mối hàn
Chế độ lái:Tự động
Chế độ lái:Tự động
Van kiểm tra oxy (hai đĩa)
Định nghĩa sản phẩm và sứ mệnh an toàn:
The Oxygen Check Valve is a core safety device in oxygen distribution systems, specifically designed to prevent backflow of highly reactive oxygen media and eliminate the risk of combustion and explosion caused by backflow contamination and reverse impact. It overcomes the potential failures and safety hazards of general-purpose check valves in oxygen-rich environments due to non-flammable materials, sealing surface jamming, and static electricity buildup, providing absolutely reliable unidirectional flow protection for oxygen supply pipelines in air separation, chemical, metallurgical, and medical applications.
Công nghệ kiểm tra oxy JH Gene
- Intrinsically safe design → All components are oil-free and degreased, with residual grease content ≤0.1mg/m² (JB/T 12955)
- Flame-retardant material system → Key sealing surfaces utilize non-flammable and spark-resistant materials such as copper alloys.
- Reliable electrostatic discharge → Electrostatic conduction resistance between valve disc and valve body ≤10Ω (ISO 22513)
- Zero-leakage seal → Leakage rate after closure ≤10⁻⁶ mg/s·m (ISO 15848-1)
- Phân tích kỹ thuật sản phẩm
- Thép không gỉ
- Silent Buffer
The Dual-disc Oxygen Check Valve is specifically designed for highly reactive oxygen environments, with its core safety feature being the construction of a comprehensive “oxygen-compatible” system. All flow components undergo pharmaceutical-grade deep cleaning treatment to completely eliminate hydrocarbon contaminants; the sealing surfaces utilize flame-retardant materials with precise hardness matching to prevent particle generation and frictional overheating from the source. The unique dual-valve linkage structure integrates a continuous electrostatic discharge circuit and a rapid response mechanism, combined with CFD-optimized flow channel design, to jointly eliminate risks such as static electricity accumulation and high temperatures from adiabatic compression, providing a complete safety barrier for oxygen pipelines from materials and structure to flow field.
The fully circulated components are made of stainless steel with precision-polished inner cavities, meeting stringent requirements for cleanliness, sterility, and corrosion resistance, making them suitable for food, pharmaceutical, and corrosive environments.
Thiết kế cốt lõi:
▌All stainless steel flow channels → Valve body, valve disc, and spring are all made of 304/316 stainless steel (ASTM A351 CF8/CF8M) | Pure material with excellent corrosion resistance
▌ Mirror-grade internal polishing → Electrolytic polishing of the inner wall of the flow channel to Ra ≤ 0.8μm (ASME B46.1) | Smooth and seamless surface, preventing media residue and bacterial growth.
▌ Sanitary sealing → Uses FDA-compliant EPDM or FKM sealing rings | Meets the hygiene certification requirements of the food and pharmaceutical industries
▌ Anti-jamming optimization → Precisely calculated movement clearances and surface treatments | Ensure reliable opening and closing even in viscous media.
Through structural optimization and damping design, the impact noise and water hammer pressure peak when the valve disc closes are significantly reduced, improving the system’s quietness and safety. It is suitable for building water supply and drainage and pump rooms.
Thiết kế cốt lõi:
▌ Hydraulic buffer or flexible damping → The disc integrates a micro buffer or has an elastic edge design that effectively absorbs kinetic energy at the end of closing and eliminates metal impact noise.
▌Water Hammer Peak Suppression → Optimize the shut-off curve to achieve “fast shut-off-slow closure” | Suppress water hammer pressure peaks to within ≤1.25 times the working pressure.
▌Low Flow Rate Stability → Improved valve counterweight and spring matching | Prevents valve flutter during small flow fluctuations in the system, resulting in quieter operation.
▌Long-lasting noise reduction → Key buffer components are made of fatigue-resistant materials | Ensuring that noise reduction performance does not diminish after long-term use.
Thiết kế cốt lõi và những ưu điểm
- Fundamental fire safety: Oxygen Check Valve performs oil-free degreasing and matching of fire-retardant materials on all contact surfaces → grease residue is close to zero, and the sealing pair is made of dissimilar fire-retardant materials|eliminating the source of ignition and fuel at the source, achieving intrinsic safety.
- Dynamic static discharge: JH oxygen check valve has a built-in valve disc static discharge mechanism → dynamic conduction resistance is stable ≤10Ω (ISO 22513) | Real-time discharge of frictional static electricity, overcoming the problem of static electricity accumulation in high-speed oxygen flow.
- Anti-seize long-lasting seal: Utilizes copper alloy/stainless steel dissimilar sealing pairs and precision guides → scientifically proportioned hardness difference for precise gap control | Prevents sealing surface seizing and abnormal wear, ensuring reliable sealing for life.
- High cleanliness ensures purity: Degreasing, cleaning and drying processes based on pharmaceutical standards → meet the requirements for ultra-high purity oxygen delivery of over 99.6% | prevent secondary contamination and ensure the quality of the final medium.
- Reliable operation across the entire temperature range: A complete product series from ambient oxygen to liquid oxygen at -183°C → Materials and structures designed for cryogenic adaptation | Overcoming low-temperature embrittlement and cold shrinkage leakage, covering the entire air separation process.
- Nearly zero maintenance costs: Durable design based on safe materials and oil-free lubrication → Service life is 3-5 times that of general valves | Achieves maintenance-free operation throughout the entire life cycle, significantly reducing the total cost of safe operation.
Các sản phẩm khác
FAQ-Oxygen Check Valve
An Oxygen Check Valve is designed exclusively for oxygen service (including LOX), with its core distinction being extreme contamination prevention and fire/explosion safety design. Using a standard valve for oxygen risks catastrophic combustion from residual grease, incompatible materials, or friction/static electricity in high-velocity pure oxygen. Oxygen-specific check valves adhere to stringent oxygen service standards in materials, cleanliness, construction, and testing.
The primary safety objectives are preventing backflow contamination and eliminating ignition sources. A dedicated valve not only reliably prevents media backflow to protect upstream equipment but, more critically, is inherently safe in an oxygen environment. Through oil-free assembly, compatible materials, controlled velocity, dead-leg-free design, and anti-static features, it eliminates the risk of the valve itself becoming an ignition source.
Our products strictly adhere to the highest standards for oxygen equipment:
General Industry Certs: API, ISO, CE, ABS, BV, CCS.
Oxygen Service Core Standards: Tuân thủ EIGA IGC 33/12 / IGC 33/06, ASTM G93 cleanliness, CGA G-4.1 for oxygen piping systems.
Cleanliness & Safety: Manufacturing and cleaning procedures meet rigorous standards such as NASA clean assembly protocols, ensuring delivery free of contaminants.
Selection must balance sealing reliability Và oxygen compatibility:
Loại đĩa: Lift type offers better sealing but requires smooth guiding surfaces to prevent sticking. Kiểu đu has lower flow resistance but needs optimized design to prevent impact sparks during rapid closure. Axial flow type is often preferred for high-performance oxygen lines due to its streamlined design and quick, non-slamming closure.
Critical Materials:
Metallic Parts: Oxygen-wetted parts (body, disc, spring) must use certified compatible materials like stainless steel (e.g., 316L), Monel, hoặc copper alloys. Materials like aluminum or titanium (flammable in pure O2) are prohibited.
Vật liệu làm kín: Phải sử dụng vật liệu chống cháy giống PTFE, modified PTFE (e.g., Rulon®), or PCTFE. Rubber or any combustible polymers are strictly forbidden.
The core prohibitions are “oil” and “contamination”. Operations must follow strict protocols:
Chuẩn bị trước khi cài đặt: Van must not be opened and handled directly. Verify the Giấy chứng nhận vệ sinh and only remove end caps immediately before connection. Personnel must wear clean garments and gloves.
Trong quá trình cài đặt: Sử dụng dụng cụ chuyên dụng, không dầu. Ensure the piping system is thoroughly purged. Install the valve in the correct orientation (matching flow direction arrow).
BẢO TRÌ: Never use oil-based solvents, lubricants, or sealants. Any maintenance (e.g., cleaning) must be performed in a controlled clean environment using dung môi tương thích với oxy (e.g., specific grades of perchloroethylene) by trained personnel.
The design incorporates multiple layers of active protection:
Source Control (Cleanliness): All parts are precision degreased and cleaned to specified cleanliness levels before assembly.
Ignition Source Control:
Kiểm soát tốc độ: Optimized flow passages ensure oxygen velocity at throttling areas remains below safe limits under all conditions, preventing adiabatic compression heating.
Chống tĩnh điện: Đảm bảo electrical continuity between moving parts (e.g., disc, body) to dissipate static charges.
Low-Friction Design: Select compatible friction pair materials with surface treatments to minimize frictional heating.
Structural Safety: Sử dụng solid body construction, avoiding flammable gaskets. Internal passages are smooth and free of dead legs to prevent particle accumulation and friction.
Technically possible, but subject to rigorous evaluation and re-qualification. While its high cleanliness and materials suit other high-purity or corrosive gases, “dedicated use” is best practice. If considering alternative use:
* Forward Change (Oxygen to Other): Requires thorough evaluation of new media compatibility with valve materials.
* Reverse Change (Other to Oxygen): Absolutely forbidden. A valve used for non-oxygen service may have absorbed contaminants and must never be used for oxygen.
* Any change requires strict written procedures and cleanliness verification.
The following oxygen-specific requirements must be explicitly stated:
Media Details: Gaseous Oxygen (GOX) / Liquid Oxygen (LOX), operating pressure, temperature, purity, and maximum flow rate.
Cleanliness & Degreasing: Hãy chỉ định cleanliness class (e.g., ASTM G93 Class B) and require a Giấy chứng nhận vệ sinh.
Danh sách vật liệu: Require a complete list of oxygen-wetted part materials, including grades and suppliers.
Design & Test Documentation: Request fire-safe design justification, anti-static test report, Và maximum allowable velocity calculations.
Packaging & Marking: Require valve ends sealed with clean blind flanges and clear “OXYGEN SERVICE, OIL-FREE” markings.