Needle valve needle needle valve is a kind of throttle, adjust the accuracy is relatively high. The valve is acicular, moving along the direction of flow, changing the flow area, to cut off or regulate the flow of the valve. Needle valve is a kind of trim valve, the needle plug is needle-shaped, mainly used to regulate the air flow. Trim valve valve opening required to gradually become larger, from close to open the maximum continuous fine tuning. Needle valve plug that is able to achieve this function. Needle valve plug generally quenched steel long needle, and the valve seat is made of tin, copper and other soft materials. Sealing between the needle and the valve seat is to rely on its tapered surface to achieve close fit. Valve needle taper 1:50 and 60 two cone angle, the cone surface to be finely ground. Stem and valve seat to ask the seal is achieved by the bellows. Maximum operating pressure: 6000PSI (414Bar) Maximum temperature range: -65F ℉ - 600F (-54 ℃ - 316 ℃) Valve Size: (inch) 1/4 "- 1" (metric) 6mm - 12mm Connection Type: Gyrolok Dual Card Sleeve, NPT thread Body material: copper, 316SS, carbon steel and a variety of special materials Circulation capacity Cv: 0.4 - 1.2
Metallographic Cutting Machines
Cutting is the first step of material analysis. The selection of cutting machine and cutting wheel must comply with the geometric size and material characteristics of the sample. The perfect metallographic cutting should avoid microstructure thermal damage and deformation, and preserve the necessary accuracy and efficiency.Hardness and ductility are the two main parameters for selecting the cutting wheel. The best choice of the cutting wheel depends on the size, hardness and ductility of the material and the equipment used. Trojan's cutting products speak with facts and the cutting process is simple, fast and accurate.
Metallographic Cutting Machines,Metallographic Cutting Equipment,Metallographic Cut-Off Saw Equipment,Metallurgical Sample Cutting Machine
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