Slow closing inlet and outlet valve product characteristic
More flexible air release method
The low pressure exhaust automatic process is divided into two stages: low pressure difference full exhaust, exhaust velocity is relatively high differential pressure limit. To eliminate the impact of water hamme pressure fluctuation in special conditions for full exhaust and the mounting of the system
More extensive scope of application
Application for pipeline with possible water column separation conditions and large diamete,long distance pipeline, rapid water filed main pipeline ancdeep wellpump, to protect the pipeline system to avoid water hammer effect
Component | Material |
Screen cover Screen Sealing Retainer Float ball Cushion Guide pin Body Cover Gasket Leverage bracket Air-vent A floating ball lever Connectiontube | Stainless steel Stainless steel NBR/EPDM Stainless steel Stainless steel NBR/EPDM Stainless steel Ductile iron Ductile iron NBR/EPDM Stainless steel SS/Brass Stainless stee |
Note: * composite type high speed exhaust valve / Slow closing inlet and outlet valve general parts |
High speed compound air release valve product features:
▪ Exhaust process more smoothly
Steady air release can avoid pressure surge and protect pipeline damage .
▪ More autonomous working mode
The valve can release air when filing water in pipe, enter air to get rid of negative pressure when vacuum or negative pressure exists .
▪ A more reliable way of discharge
Quick released ai and air with water wil not dose valve orfice in advance and cause air sea. Orice will close when air is released completey .
▪ Automatic protection safer performance
Whenever if system pressure is lower than atmosphere forexample, water coymn happened, the valve will open immediately and air wilenter svstento aet rid of neaative pressure, At the same time, Entering air can speed up the speed of air release during air release .
High speed compound air release valve technical parameters
Compound quick air inbreathe-release valve valve dimensions
Close cut-off valve under air release valve. take off the connection bolts between valve body and cover use water to clear foatong ball ,body ,cover ,sealing ring and creen. The foating ball is put back in place, install the high speed air valve cover, tighten the bolts; Open the cut-off valve.
Installation and maintenance
Installation
Valve Should be installed vertically in the pipeline highest piont. The cut-off valve (butterfly valve or gate valve)should be installed beforeair release valve.
Routine maintenance
Regular check and maintenance should be made as regular work. Check and maintenance is recommened for one or two times in one year. The work can increase according to water condition.
Technical Data
1.Valve desian and manufacture according to CJT 217 standard
2.Valve testing and inspection standards in accordance with GB/T 13927 standard
3.Flange connection in accordance with GB/T 17241.6 standard
4.Product apperance conforms to GB/T 7927 standard
Applicable Pressure: PN1.0~1.6MPa
Applicable Size:DN15~300
Applicable Temperature: -25℃~90℃
Body Material: Cast iron, Ductile iron
Connection Type: Thread, Flanged
High speed compound air valve overall dimension PN10. PN16
Compound quick air inbreathe-release valve exhaust volume curve
High speed compound air release valve/Slow closing inlet and outlet valve Product srructure
Note: * composite type high speed exhaust valve / Slow closing inlet and outlet valve general parts
Slow closing assemblv operation process
In the deep well pump in operationn
In the deep wel pump room,the pipeline first filed with water, the air through the air valve at high sped, the pipe in the water to high-speed impact foat, the air vaive suddeny closed. formino a ciosed valve water hammer. The ciosed -ipe ar vave s dwded into wo stage. which can eleclvely preven the ar vaive suddeny shuidown, thereby reducing the pressure fluctuation in the system.
Running of the water column separation
Pumping station power and other accidents caused by water column separaton conditions. Water column in the pump or pipe high separate to form a negative pressure zone,opposite the water fow in the pipelme, forming water column o brdge and its nstantaneous hiah pressure may wl make the pipeline burstln
In the special point of the pipeline, the air valve is installed, and the working process is as follows:
When the water column is separated, a lot of air from the air valve into the vacuum, eliminating negative pressure.
When the water column is close the air wll be mmediately purge through the vent valve. Slow closing built-in component, limit the exhaust fiow rate, pressure fluctuations in the pipeline.
Slow closing type of air valve buffer structure, effectively improve the valve airin the condition of the gas phase, the valve can also run normally
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