Shenzhen Wofly Technology Co., Ltd.

Stainless steel flexible high pressure braided hoses for gas use are designed in different lengths, mainly to meet diverse application scenarios and practical needs. 1. Adaptation to Different Installation Distances Long distances: Some applications (e.g. industrial gas distribution, laboratory equipment connections) require hoses to span long distances. Longer hoses (e.g. 10 metres or more) reduce the use of couplings and reduce the risk of leakage. Short connections: Compact spaces (e.g. medical equipment, gas stoves) require short hoses (0.5-2 metres) to avoid tangles or redundancies, ensuring safety and aesthetics. 2. Pressure and Flow Optimisation Length affects pressure drop: Fluid flow in a long hose creates frictional resistance, resulting in a drop in pressure. High-pressure scenarios (e.g. hydrogen storage) may require shorter hoses to maintain pressure stability. Flow matching: Long hoses may restrict flow rates, and the appropriate length should be selected based on the type of gas (e.g., propane, oxygen) and flow requirements.   3. Safety and Compliance Requirements Standards: Different countries/industries have strict regulations on hose lengths. For example, domestic gas hoses are usually no longer than 1.5 metres to prevent the risk of mechanical damage or deterioration. Bend radius limitation: Excessive bending of long hoses may lead to fatigue breakage of the metal braid, and the length needs to be adjusted according to the usage environment.   4. Flexibility and Convenience Mobile equipment needs: If welding cylinders need to be moved frequently, longer hoses (3-5 metres) provide operational flexibility; for fixed equipment, shorter hoses reduce clutter. Installation Angle Adaptation: Different lengths can be adapted to complex pipework, avoiding twisting or stretching.   5. Cost and Material Savings Customisation: Avoiding the waste of material caused by excessively long hoses (higher cost of stainless steel), users can choose economic lengths according to actual needs. Transportation constraints: Extra long hoses (e.g. >20m) may be more difficult to transport, standardised lengths in segments are easier to handle.   6. Special Application Scenarios High/low temperature environments: Extreme temperatures may cause the hose to expand and contract, so allowances should be made for length. Vibration cushioning: vibration areas of machinery and equipment (e.g. compressor outlets) may require longer hoses to absorb vibrations.   Summary Stainless steel flexible high pressure braided hoses are available in different lengths to balance safety, functionality, economy and compliance. Selection requires consideration of the gas type, pressure rating, installation environment and industry standards to ensure that it meets both the needs of the application and safety regulations.

Why do I need to avoid overpressure? Equipment damage: Downstream instruments, pipelines or vessels may rupture due to pressure exceeding design values. Safety hazards: Gas/liquid leaks can lead to fire, explosion (e.g. flammable media) or mechanical injury. Regulator failure: Prolonged overpressure can damage diaphragms, springs or spools, resulting in regulation failure. Common causes of overpressure Upstream pressure surge: e.g. uncontrolled pressure of air source, sudden start of pump. Downstream blockage: Valve mistakenly closed or filter clogged, resulting in pressure build-up. Regulator failure: Valve spool jammed, diaphragm rupture, losing the function of pressure reduction. Incorrect operation: Manual adjustment exceeds the system pressure limit.   How to avoid overpressure effectively? 1. Choose a pressure regulator with safety features Built-in pressure relief valve: some regulators have integrated pressure relief holes (e.g. LPG pressure reducing valves), which automatically vent the air in case of overpressure. Flow limiting design: Physically limiting the maximum output pressure (e.g. unregulated pressure reducing valves).   2. Used in conjunction with an independent safety valve Installation position: The safety valve should be located downstream of the regulator, near the equipment to be protected. Setting value: Safety valve starting pressure ≤ Maximum allowable pressure of downstream equipment (usually 1.1~1.2 times the set pressure).   Type selection: Spring-loaded safety valve: for gas/liquid, reusable. Rupture disc: one-time pressure relief, for extreme high pressures or corrosive media. 3. System Design Redundancy Parallel redundant regulators: Critical systems can be configured with dual regulators + switching valves for manual switching in case of failure. Pressure sensor + alarm: real-time monitoring of downstream pressure, triggering shutdown or audible and visual alarms in case of overrun.   4. Operation and Maintenance Slow pressure increase: gradually increase the pressure when regulating to avoid shocks. Regular test: manually trigger the safety valve to check its effectiveness (pay attention to safety protection). Replacement of worn parts: e.g. aging of diaphragms and seals can lead to failure of the pressure relief function.   Safety Valve Selection Example Parametric Example Value Clarification Medium compressed air Compatible material stainless steel Set Pressure 10 bar Lower than the maximum pipe pressure (e.g. 12 bar) Leakage Rate 50 m³/h Required to meet maximum system overpressure flow requirements. Connection Method G1/2” Thread Match pipe size.   Typical application scenarios Laboratory gas cylinders: oxygen regulator + safety valve to prevent overpressure in experimental equipment. Industrial boilers: main regulator + multiple safety valves, complying with ASME standards. Hydraulic system: relief valve as safety valve to protect cylinders and pipelines.   Precautions Safety valves must not be isolated: it is forbidden to install globe valves in front of safety valves (unless interlocked and protected). Direction of media discharge: Flammable/toxic gases need to be directed to a safe area (e.g. flare system). Periodic calibration: Safety valves need to be calibrated according to regulations (e.g. annually).

If your pressure reducer is experiencing erratic pressure, it is indeed possible that the unit is in need of inspection or maintenance. Below are possible causes and corresponding solution suggestions to help you quickly troubleshoot the problem: Common Causes and Solutions   Wear and tear of the internal components of the pressure reducer Phenomenon: High pressure fluctuations and failure of the adjustment knob. Cause: Diaphragms, springs or valve seals are deteriorating. Treatment: Replace the worn parts after disassembling and inspecting (recommended to be operated by professionals).   Unstable intake pressure Phenomenon: Output pressure changes drastically with input pressure. Check point: Confirm whether the pressure of the upstream air source is stable, and install a pressure regulator valve if necessary.   Excessive change of outlet load Phenomenon: Frequent starting and stopping of gas-using equipment leads to sudden pressure changes. Solution: Increase the gas storage tank on the outlet side to buffer the pressure fluctuation, or choose the pressure reducer with larger flow specification.   Clogging or freezing of impurities Phenomenon: Sluggish pressure regulation, accompanied by poor airflow. Treatment: clean the filter, drain the pipeline water; low temperature environment need to add electric heaters to prevent freezing.   Improper selection Phenomenon: Long-term overload operation leads to performance degradation. Suggestion: Check whether the rated flow rate and pressure range of the pressure reducer match the actual demand.   Quick self-test steps Observe the pressure gauge: record the input and output pressure value, confirm whether the fluctuation is out of the normal range. Watch for leaks: Use soapy water to coat the ports and watch for bubbles. Listen for strange noises: If there is a gas leak, it may be a seal failure. Manual Adjustment: Try adjusting the knob slowly to check the pressure response. Troubleshooting the gas end: Turn off the downstream equipment and observe whether the pressure returns to stability to determine whether it is a load problem.   Maintenance Tips Regular Maintenance: Check seals and clean cartridges every 3-6 months. Replacement of consumables: Rubber seals are recommended to be replaced once every 1-2 years (depending on the frequency of use). Professional calibration: Precision application scenarios require periodic delivery of pressure accuracy checks.   If the above steps still can not solve the problem, or the equipment has serious leakage / damage, it is recommended to contact the manufacturer or professional maintenance personnel to deal with, to avoid potential safety hazards.   Tip: Be sure to cut off the gas source and relieve the pressure before operation! Safety first!

Selecting the right pressure reducer is critical to ensuring equipment longevity and operational safety. Below are the five key parameters that determine the performance and safety of a pressure reducer, as well as detailed recommendations when making a purchase: 1. Material and corrosion resistance The material of the pressure reducer has a direct impact on its corrosion resistance and service life, especially when dealing with corrosive gases (e.g. nitrogen dioxide, chlorine, etc.): Valve body and key components: 316L stainless steel is recommended for its excellent corrosion resistance and mechanical strength. Seals: Polytetrafluoroethylene (PTFE) or perfluoroether rubber (FFKM) are suitable for highly corrosive environments. High purity gas application: If the gas purity is ≥99.999% (Five nines), it is recommended to use BA grade or EP grade stainless steel.   2. Pressure adjustment range and stability Input/output pressure: need to match the actual demand, such as high-pressure applications (such as 40MPa) can choose piston pressure reducer (such as RF4 series). Adjustment accuracy: the output pressure fluctuation of high-quality pressure reducer should be ≤ ± 0.01MPa. Safety test pressure: usually 1.5 times the maximum input pressure, to ensure the safety of equipment in extreme conditions.   3. Flow rate and CV value CV value: represents the flow capacity of the pressure reducer, the higher the CV value, the higher the flow. For example, CV=0.08 is suitable for medium flow requirements, while CV=0.06 may be suitable for high pressure low flow scenarios. Dynamic and static pressure difference: If the difference is too large, it may indicate improper flow selection.   4. Safety performance and protection measures Overpressure protection: some high-end pressure reducers are equipped with automatic cut-off or pressure relief function. Leakage rate: high purity gas applications require very low leakage rates (e.g. ≤2×10-⁸ atm cc/sec He). Anti-reflux design: Some pressure reducers have built-in filters (10μm) to prevent contaminants from entering the system.   5. Installation and compatibility Connection type: common such as 1/4’ NPT (F), make sure to match the existing piping. Installation form: panel, wall or pipe bracket installation, according to the space layout to choose. Gauge Configuration: Cylinder pressure reducers are usually equipped with dual inlet and outlet gauges, while piped pressure reducers can be equipped with outlet gauges only.   Additional considerations Brand and after-sales service: AFKLOK usually provides more reliable technical support and warranty service. Temperature adaptability: the operating temperature range should cover the operating environment (e.g. -40°C to +74°C). Maintenance intervals: Stainless steel pressure reducers typically have a life expectancy of 1 year or more, but require regular servicing.