Basic Info.
NPT/BSP Male to Female Thread Gas Flow Control Needle ValveNeedle valves are usually used in flow-metering applications, especially when a constant, calibrated, low flow rate must be maintained for some time, such as the idle fuel flow in acarburettor.
Note that thefloat valveof a carburettor (controlling the fuel level within the carburettor) isnota needle valve, although it is commonly described as one. It uses a bluntly conical needle, but it seats against a square-edged seat rather than a matching cone. The intention here is to obtain a well-defined seat between two narrow mating surfaces, giving firm shutoff of the flow from only a light float pressure.Needle valves are also commonly used to provide shut off for the pressure gauge or on applicators to shut off the supply of NH3 to the knives in Anhydrous Ammonia (NH3) applications.
Since flow rates are low and many turns of the valve stem are required to completely open or close, needle valves are not used for simple shutoff applications.
Since the orifice is small and the force advantage of the fine-threaded stem is high, needle valves are usually easy to shut off completely, with merely "finger-tight" pressure. The spindle and/or seat of a needle valve, especially one made frombrass, are easily damaged by excessive turning force when shutting off the flow.
Small, simple needle valves are often used asbleed valvesin water-heating applications.
Unlike aball valveor valves with a rising stem, it is not easy to tell from examining the handle position whether the valve is open or closed.
| Name | OEM stainless steel investment casting parts Material |
| Material | 304,306 ,2205stainlesssteeletc, |
| Designs | 1.Asperthecustomer'sdrawings |
| 2.Asperthecustomer'ssamples | |
| Surfacetreatment | 1. mirror polish |
| 2. passivation | |
| Service | OEMserviceavailable |
| Products | Allkindsofstainlesssteelcasting:include pipe fitting, ball valve, automotiveparts,railroadparts,medicalparts,marineparts,lightingparts,pumpbody,valveparts,architecturalpartsandfurniturepartssoon |
| Advantage | 1. More than 10 yearsexperience instainlesssteelcasting; |
| 2. NearTianjin PortandTianjin Airport; | |
| 3. Weprovide:OEMstainlesssteellostwaxcastingsandOEM machiningservicesforstainlesssteellostwaxcastings. Wehave:CNCMachining,CNCturning,CNCMilling,3DCMM InspectionandCNCOpticalInspection. Webelieve:ontime,stablequality,justprice,clientconfidentiality. | |
| 4. Withsamplesandorder:Wecanofferdimensionreport,materialcertification. | |
| Inspection: | 1.Dimensionreport |
| 2.Materialcertification | |
| Packing: | Exportcartonandfumigationwoodenpall |
Hebei JunyaPrecision Machinery Co. Ltd is a high-tech enterprise combine designing, tooling developing, casting, machining, surface treatment, inspection, sales and service all together. Founded in 2017, located in Huanghua, Hebei. Junyanow covers an area of more than 5000 square meters.With a massive research & development environment, Junyautilized market-leading technology and introduced various of advanced equipment to ensure the stringent quality in production.Under a powerful management team, the company has growing to the group with more than 100 employees. Product offerings range from Stainless Steel Pipe Fitting, Quick Joint, Ball Valve, Check Valve, to Marine Hardware and Auto Parts. The material are 304, 304L, 316, 316L, SF8M, WCB, 1.4408, etc.-Quality- -Creativity- -Consistency-These words are Junyaslogan, and also philosophy that drives the company to offer the superior service you are looking for.