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How to select sanitary sight glass gasket?

Sanitary sight glass is mainly made from 321/316 304/316 / l and other materials produced by the lens, lens used in pressure vessels with stainless steel equipment, chemical tower and other cylindrical device, and stainless steel pipe lens is suitable for chemical, oil, electric power line, etc. Between the lens and piping or equipment sealing gasket selection whether  related to endoscopic right price, at the same time will directly affect the pipe and pipe endoscopic run, run, drip, leak phenomenon.Health level, mainly is to look at the mirror lens gasket selection of the use of pressure   diameter flange sealing surface temperature and the type of  medium corrosive treat selected respectively. According to the latest standard of HG, the main health level lens gaskets and flange sealing gaskets as follows. 1. The rubber gasket: nominal pressure < = 1.6 MPa, = 10 ~ 2000 mm in diameter, the highest temperature < 200 degrees, sealing surface style: surface, concave/convex, tenon surface/groove surface, the whole plane, flange style: a variety of types. 2. Asbestos rubber sheet: nominal pressure < = 2.5 MPa,Diameter =10~2000mm, maximum temperature <300 degrees, sealing surface type: protruding surface, concave/convex surface, tenon/groove surface, full plane, flange type: various types

Non-asbestos fiber rubber plate: nominal pressure <= 4.0mpa, diameter =10~2000mm, maximum temperature <290 degrees, sealing surface type: protruding surface, concave/convex surface, tenon/groove surface, full plane, flange type: various types 4. Polytetrafluoroethylene: nominal pressure <= 1.6mpa,= 10 ~ 2000 mm in diameter, the highest temperature < 100 degrees, sealing surface style: surface, concave/convex, tenon surface/groove surface, plane, flange style: a variety of forms. 5. Expansion or filling modification of ptfe or belt: nominal pressure < = 4.0 MPa, = 10 ~ 2000 mm in diameter, the highest temperature < 200 degrees, sealing surface style: surface, concave/convex, tenon surface/groove surface, plane, flange style: a variety of type 6. Reinforced flexible graphite plate: 1.0 ~ 6.3 MPa nominal pressure, = 10 ~ 2000 mm in diameter,Highest use temperature < 650 degrees, sealing surface style: surface, concave/convex, tenon surface/groove surface, flange style: a variety of type 7. High temperature mica composite panels: 1.0 ~ 6.3 MPa nominal pressure, = 10 ~ 2000 mm in diameter, the highest temperature < 900 degrees, sealing surface style: surface, concave/convex, tenon surface/groove surface, flange style: a variety of type 8. Teflon coated mat: 0.6 ~ 4.0 MPa nominal pressure,= 10 ~ 600 mm in diameter, the highest temperature < 150 degrees, sealing surface style: surface, flange style: a variety of type 9. Winding pads: 1.6 ~ 16.0 MPa nominal pressure, = 10 ~ 2000 mm in diameter, the highest temperature: according to different materials, sealing surface style: surface, concave/convex, tenon surface/groove surface, flange style: with flat welding neck/butt welding, overall, socket welding, flange cover 10. Tooth profile combination mat: nominal pressure of 1.6 ~ 16.0 MPa, = 10 ~ 2000 mm in diameter, the highest temperature of use:Sealing surface type: protruding surface, concave surface/convex surface, tenon surface/groove surface,

Flange type: neck butt welding/butt welding, integral, socket welding, flange cover 11. Metal coated pad: nominal pressure 2.5~ 10.0mpa, diameter =10~900mm, maximum temperature: according to different components, sealing surface type: face, flange type: neck butt welding, integral, flange cover 12. Metal ring pad: nominal pressure 6.3~ 16.0mpa, diameter =10~400mm, maximum temperature:700 degrees, sealing surface type: RTJ, flange style: with neck butt welding, overall, flange cover. Eventually closed above the advantages and disadvantages of all kinds of gaskets, at present this is the most common health level sight glass sealing gasket is ptfe gasket. The selection of high temperature reinforced flexible graphite composite gasket, the other in health level with less sight glasses. Only when pipeline have special requirements.