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Home Valve Products Dual Body Combination Slow Closing Air Valves; Air Release Valve; Air Vent

Dual Body Combination Slow Closing Air Valves; Air Release Valve; Air Vent

Dual Body Combination Slow Closing Air Valves; Air Release Valve; Air Vent
Price: US $ 300/Piece
Trade Terms: FOB,CFR,EXW
Min Order: 1/Piece
Pay Type: L/C,T/T,D/P,Western Union,Paypal
Tianjin U-ideal Dual Body Combination Slow Closing Air Valves;Air release valve;Air vent
Dual Body Combination Slow Closing Air Valves Design Features:
Are standard Air and Vacuum Valves mounted on a Surge Check Unit. The Air and Vacuum Valve operates in the normal fashion allowing air to escape freely at any velocity (maximum discharge velocity is approximately 300 feet per second at 6.7 PSI; however, good pipe line design restricts velocity flows of air to 10 feet per second which occurs at approximately 1 PSI). The Surge Check Unit operates on the interphases between the kinetic energy in the relative velocity flows of air and water. The Surge Check is a normally open valve, spring loaded, so that air passes through unrestricted, but when water rushes into the Surge Check Unit, the disc commences to close against the spring and reduces the rate of flow of water into the air valve by means of throttling holes in the disc. This ensures normal gentle closing of the Air and Vacuum Valve, regardless of the initial velocity flow involved and minimizes surges when the valve closes. As soon as the Air and Vacuum Valve is closed, the pressure on both sides of the surge Valve disc equalizes and the disc automatically returns to its open position. This means an Air and Vacuum Valve does not need an incipient vacuum to open, but can open at any time the water level drops and line pressure approaches atmospheric and immediately have full re-entry flow of air into the pipe line before a vacuum can form.

Applications for Tianjin U-ideal float-type air vents 
include hydronic heating systems, water service lines, water storage tanks, centrifugal pumps, gas lines, solvent filters and similar equipment. Operation is completely automatic, and the simple design and quality mechanism make operation trouble-free and maintenance infrequent.

Air vent valves are used to allow the pressure in the tank to balance while preventing the spillage of the fluid through the vent lines. These valves allow the free flow of fluid or air in or out of a chamber or tank until they close, usually activated by a float.
During refueling, incoming fuel dis-places the air in the tank. The vent valve allows this air to escape through a designated vent path
When the tank is full, the float valve closes preventing the fuel from escaping. These valves also allow air to re-enter the tank as fuel is consumed, preventing dangerous negative pressure and potential fuel starvation. Vent valves protect the fuel tank from pressure damage resulting from expansion and contraction of the fuel due to changes in temperature. In some applications they incorporate measures to prevent the fuel from exiting the tank when the aircraft is inverted either during flight or in an emergency.

Why remove air from a water system?
Every building services engineer knows that air trapped in either a hot or chilled water system can cause
trouble, such as excessive noise, corrosion and increased maintenance costs. Air can cause air locks which inhibit the filling of the system or the priming of pumps. It can seriously affect the accuracy of flow measurement meters and regulating valves. Under extreme conditions it may even temporarily decommission plant.
Air and other incondensable gases considerably reduce heat transfer efficiency. A film of air 1 mm thick
presents the same barrier to heat transfer as a wall of copper 13 m thick!
Entrapped air in any water system is a threat to thermal efficiency. It is particularly damaging in a chilled water system which does not have the natural deaerating ability of hot water.
 
OriginTianjin China
BrandTianjin U-ideal Instrument
ConnectionFlange or thread
Export MarketsGlobal
PackingWooden Case or Carton

About usOur company is specialized in the manufacture of valves,
,flow meters,level gauges,etc
Why Choose us
Rich experienceWe have been engaged in machining for many years. Our company had good reputation with customers from American, Europe, North America, and Australia, India etc. We also have a good team for sale and quality control.
Good serviceWe will respond to you within 24 hours. We manufacture non-standard parts according to your drawings. And we will continue to serve you after sales and will be responsible for the mistakes from us.
Low priceThe prices of our production are reasonable! The prices will be much better if your quantity is good.
Perfect qualityWe have strict quality control from producing to delivery. Our company had strong technology support, 80% of our colleagues are master or bachelor's degree. We have cultivated a group of managers who are familiar with product quality, good at modern concept of management.
Contact
If you have any question or requirements, please don't hesitate to contact us.

Tel: 86-22 88971536
Fax: 86-22 88971536



Prod Model: AV851
Markets: North America,South America,Eastern Europe,Southeast Asia,Africa,Oceania,Mid East,Eastern Asia,Western Europe
Diameter: Dndn40~300mm
Pressure.: Pn0.6~2.5MPa
Temperature: 0-7degree Centigrade
Standard.: GB, DIN, ANSI, GOST, JIS, BS
Material.: Cast Iron, Carbon Steel, Stainless Steel, Aluminium
Tianjin U-ideal Instrument Co., Ltd is a professional supplier of level instruments, flow meters, gates valves, pressure control valves, pneumatic and electric control ball valves, check valves, globe valve, pressure reducing and sustaining valve and steam traps and strainers from year 2006, are one of the repute' S manufactures in China, We have been cooperated with many famous companies all over the world, and quantities are satisfy all of our customers. Our products have passed the CE, GS, ISO9001 approvals.

Fluid water level switch(float switch, radar level switch, ultrasonic level switch, vertical level switch, horizontal level switch, flange level switch, thread level switch), tank gauges (Magnetic level gauges, glass tubular level gauges, sight glass level indicator, transparent level meter and reflective level gauge, weld glass water meter, oil level meter, fuel level control and indicator), drop-in type level sensor(cable level sensor, pole level switch, hydrostatic pressure level sensor and level transmitter, capacitive level sensor, ultrasonic level transmitter, non-contact level meter and float level transmitter) tank flange level indicators, radar RF level meter and so on.

Flow meters: Metal rotary flow meters(float flowmeter, rotameter, gas rotameter, bypass rotameter), vortex flow meters (steam vortex flowmeter) flow sensor, flow switches and liquid and gas turbine flow meters, conductive fluid electromagnetic flow meters, PD flow meter such as oval gear wheel flow meters, roots flow meters) precession vortex gas flow meters, flow sensor and other flowmeasurement instruments.

Ultrasonic Level, Ultrasonic Level Measurement, Level Measurement, Level Sensors, Ultrasonic Level Sensors, Ultrasonic Flow Meter, Ultrasonic Level Probe, Ultrasonic Meter, Ultrasonic Distance Meter, Ultrasonic Meters, Ultrasonic Level Detection, Ultrasonic SensÖ R, Ultrasonic Sensors, Ultrasonic Level Sensor, Level Sensor Ultrasonic, Ultrasonic Measuring, Ultrasonic Testing, Sensor Ultrasonic, Ultrasonic Measurement. Water Level Sensor Switch, Water Level Sensor, Water Level Sensor Circuit, Level Sensor Water, Liquid Level Sensor, Magnetic Level Switch, Magnetic Switch, Oil Level Sensor, Magnetic Float Switch, pressure transmitter, differential pressure transmitter.

Safety valve, pressure control valve, safety relief valve, pressure relief valve, pressure transmitters, pressure gauge, temperature gauge

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