Liquid flow indicator (backstop type)
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Backstop type liquid flow indicator: the shell adopts integral casting type, with reliable strength and long life, built-in flow rate scale indication, spring check.
Its main connection methods: threaded, welded, flanged.
Thread type: DN6-DN100 (1/8-4 inch)
Welding type: DN6-DN300 (1/8-12 inch)
Flange type: DN15-DN300 (1/2-12 inch)
Pressure rating: 0.6/1.0/1.6/2.5/4.0MPA (150LB-300LB)
Glass pressure resistance: tempered borosilicate glass sheet≤2.5MPa, quartz glass sheet≤10.0MPa, tempered borosilicate glass cylinder<0.6MPa
Quartz glass cylinder<0.6MPa
Body material: carbon steel (WCB); stainless steel (304/316/304L/316L); duplex steel
Window material: soda lime glass; tempered borosilicate glass; quartz glass
Glass temperature resistance: tempered borosilicate glass: ≤200°C, quartz glass: 1000°C, allowable sudden change temperature ≤60°C
Sealing gasket: Nitrile rubber gasket; PTFE gasket; metal gasket; metal graphite gasket
Nut bolt: 20# 304 304L 316 316L
Sealing surface: raised surface (RF) flat surface (FF) concave-convex surface (MFM) tongue and groove surface (TG)
Flange standard: HG GB HGJ JB ANSI JIS DIN BS NF
Manufacturing testing standard: HGJ501-502-86
Thread standard: GR RC NPT PT BSP
Body appearance: carbon steel anti-corrosion paint or blackened stainless steel pickling treatment or polishing
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