OUVI provides a series of efficient, safe and reliable pipe accessories to ensure the clean, dry and easy maintenance of steam equipment. Suitable for various industrial applications such as steam and condensate systems, hot and cold water systems, chemical thermal fluids and compressed air, etc.
Product Features and Advantages:
1.Bellows-Sealed Globe Valve: Unique double bellows seal design, zero leakage, enhances safety, extends lifespan, saves energy.
2.Steam-Water Separator: Effectively removes moisture, ensures dry steam, improves productivity and quality, reduces corrosion and scaling.
3.Steam System Air Vent: Eliminates air and non-condensable gases, improves heat transfer efficiency, reduces fuel consumption, prevents pipeline corrosion.
4.Vacuum Breaker: Prevents equipment from being in vacuum state during steam condensation, protects equipment.
5.Filter: Prevents clogging and damage from impurities, reduces maintenance costs and production losses.
Q: What are considered essential steam pipeline accessories?
A: Items include vacuum breakers, air vents, moisture separators, exhaust heads, sight glasses, and pressure gauges.
Q: What is the function of a steam sight glass?
A: It provides a visual indicator of flow conditions, allowing operators to monitor condensate movement and spot trap leaks.
Q: Why are automatic air vents installed at the end of steam mains?
A: To purge non-condensable gases during startup, ensuring steam quickly reaches the furthest points of the network.
Q: What does a steam exhaust head do?
A: Installed on vent pipes, it separates water droplets from waste steam before venting to the atmosphere, protecting roofs and personnel.
The steam-water separator is used in steam, compressed air and other gas systems to remove the water contained in the steam, air or gas system. The steam-water separator collects the separated water droplets along the inclined pipe wall and then discharges them from the bottom drain. The steam-water separator can ensure the dryness of the steam used in the equipment.
Q: How does an industrial steam moisture separator work?
A: It uses internal baffles or a centrifugal cyclone design to force liquid droplets out of the steam flow, collecting them at the bottom.
Q: What moisture removal efficiency should a separator achieve?
A: High-performance separators are engineered to remove up to 99% of entrained water particles from the steam stream.
Q: Where is the best location to install a steam separator?
A: Directly upstream of moisture-sensitive equipment, such as pressure reducing valves, flow meters, and steam turbines.
Q: Does a steam separator require a steam trap?
A: Yes. A separator collects the separated water, but it needs a dedicated steam trap connected to the bottom drain to discharge it.
Air and other non-condensable gases can cause many problems in steam systems. Not only will the warm-up time be prolonged, but the temperature of the steam-air mixture will be lower than that of pure steam at the same pressure. Air will form a gas film that reduces heat transfer efficiency, thereby increasing fuel consumption, and these gases are also the main cause of pipeline corrosion. Using a steam system air exhaust valve can remove air and other non-condensable gases in the steam system without leaking steam.
Q: What does a steam system exhaust valve (air vent) do?
A: It automatically vents trapped air and gases from pipelines and vessels during startup and regular operation.
Q: Why can’t a standard water air vent be used on steam?
A: Standard water vents cannot withstand the high temperatures, pressures, and thermal expansion forces found in steam systems.
Q: Where should steam exhaust air vents be placed?
A: At high points in the piping network, at the ends of steam mains, and on jacketed processing vessels where air naturally collects.
Q: How does a thermostatic air vent identify air vs steam?
A: It senses temperature. Air is cooler than live steam; the internal capsule stays contracted to vent air and closes tight when hot steam arrives.
Vacuum breakers are used to break the vacuum in steam systems, which can effectively protect the equipment from being in a vacuum state when steam condenses. Its principle is similar to that of a one-way valve. When the internal pressure of the system is lower than the atmospheric pressure, the vacuum breaker opens. If the internal pressure of the system is high, the vacuum breaker is closed. Applicable to: heat exchangers, steam storage, boilers, sandwich pots, sterilization chambers, steam main lines.
Q: What is the main purpose of a steam vacuum breaker?
A: It admits air into a steam system when a vacuum forms, preventing equipment collapse and allowing proper condensate drainage.
Q: When does a vacuum occur inside steam equipment?
A: When the steam supply is turned off, the remaining steam rapidly condenses into water, creating a sudden internal vacuum.
Q: Can a vacuum cause heat exchanger damage?
A: Yes. A vacuum holds condensate inside the exchanger, leading to water hammer, thermal shock, and potential structural cracking.
Q: Where should a vacuum breaker valve be mounted?
A: It should be installed at the highest point of the steam equipment or pipeline jacket where the vacuum forms.
Y-type filter is an indispensable filtering device for the pipeline system of conveying medium. Y-type filter is usually installed at the inlet end of pressure reducing valve, pressure relief valve, positioning water valve or other equipment to remove impurities in the medium to protect the normal use of valves and equipment. Y-type filter is suitable for steam, water, oil, etc.
Q: What is the function of a Y-strainer/filter in a steam line?
A: It mechanically removes rust, pipe scale, welding slag, and debris to protect control valves and steam traps.
Q: How should a Y-strainer be oriented in a horizontal steam pipe?
A: The Y-pocket must be oriented horizontally (flat to the side) to prevent water accumulation and eliminate water hammer risks.
Q: What is a blowdown valve on a steam strainer?
A: A valve attached to the strainer cap that permits flushing out accumulated debris using line pressure without stopping operation.
Q: What materials are recommended for steam filter screens?
A: High-grade stainless steel (such as SS304 or SS316) is required to resist erosion and high steam temperatures.
The bellows sealed stop valve adopts a unique bellows seal design, which completely eliminates the problem of valve stem packing seal leakage, ensures the safety of the equipment, and achieves energy saving.
The valve uses a conical valve core instead of a flat valve core, and there is no residual impurities on the sealing surface. When closed, the sealing surface has a self-cleaning function. With the help of the conical valve core, the axial force of the valve stem can be converted into a sealing force with better sealing performance. It is used in steam and condensate, process fluids, hot and cold water, hot oil, compressed air and other gas systems.
Q: What is a bellows seal globe valve?
A: A high-integrity globe valve utilizing a flexible metal bellows to completely seal the valve stem, preventing fugitive emissions.
Q: What makes bellows seal valves superior to conventional packed globe valves?
A: They eliminate steam leakage through the stem packing, reducing energy losses and maintenance adjustments.
Q: What media are best suited for bellows sealed valves?
A: High-temperature steam, superheated water, toxic gases, and hot thermal oils where external leakage is dangerous or costly.
Q: What happens if the internal metal bellows cracks?
A: High-quality valves feature secondary conventional graphite packing as a backup safety seal to prevent catastrophic external leakage.
A check valve is a type of valve that automatically opens and closes the valve disc based on the flow of the medium itself to prevent the backflow of the medium. It is also known as an anti-reflux valve, a one-way valve, an anti-flow valve, and a back-pressure valve. It belongs to an automatic valve. The flanged check valve is designed and installed between flanges and is suitable for various fluids in process pipelines, hot water systems, steam and condensate water systems, etc. Note: The flanged check valve is not suitable for occasions with severe pulsation, such as the outlet of compressors.
Q: What is the purpose of a check valve in a steam system?
A: It permits fluid flow in only one direction, preventing dangerous medium backflow into boilers or tracing lines.
Q: Where are check valves located in a condensate loop?
A: Typically installed directly after a steam trap’s discharge outlet to prevent backpressure from forcing condensate back into the trap.
Q: What causes check valve chattering in steam applications?
A: Chattering is caused by an over-sized check valve or low flow velocities, which fail to hold the internal valve disc stable.
Q: Can a wafer check valve be used for high-pressure steam?
A: Yes, wafer check valves are compact, lightweight, and engineered in cast steel or stainless steel to handle high-pressure headers.
Solve the energy problems and challenges facing your facilities
OUVI provides products and services to keep your steam system in optimal condition, overcome challenges with customers, achieve safe and reliable operation, save energy, and improve production efficiency.
We can provide steam knowledge, various related calculations, valve and pipeline equipment selection, and overall energy-saving optimization transformation solutions for steam and thermal energy systems based on the user’s process equipment requirements.
