一、 Product Structure
1，Flange main frame
The mainstream material for the upper and lower circular flanges is 304 or 316L stainless steel. After precision machining by lathe and surface drawing and polishing treatment, it not only has a smooth and regular appearance, but also has strong rust and acid alkali corrosion resistance, which can adapt to most corrosive chemical media and food hygiene grade material environments. Multiple sets of fastening bolts are evenly distributed around the circumference of the flange, and the symmetrical locking force distribution can evenly distribute the sealing pressure, avoiding leakage or glass cracking caused by excessive local stress.,
2，Pressure resistant observation glass
The central core transparent component is tempered borosilicate mirror glass, and some high temperature, high pressure, and strong temperature difference conditions can be upgraded to high-purity quartz glass. Borosilicate glass has excellent thermal stability, can withstand alternating cold and hot impacts, high transmittance, and no visual distortion. Operators can clearly see the real state of the liquid level inside the container, material mixing, reaction foaming, liquid stratification, impurity precipitation, etc.
3，Sealing buffer gasket
Install aging resistant sealing gaskets between the two flanges, commonly made of materials such as polytetrafluoroethylene (PTFE), food grade silicone, and ethylene propylene diene monomer rubber, to fill the small gaps between the flange and glass, prevent gas, liquid, and steam leakage, and meet the safety requirements of pressure vessels without leakage. The food and pharmaceutical industry can choose gaskets that meet FDA hygiene certification to prevent secondary pollution of materials.
二，Core functions
The core value of the flange clamp equipment sight glass is to break through the visual blind spots of enclosed pressure equipment.
It is usually welded and installed on the side wall of the reaction vessel, the head of the storage tank, the pipeline buffer tank, the auxiliary chamber of the boiler, and the mixing equipment. There is no need to shut down or open the cover, and external personnel can intuitively judge the internal operation situation: real-time monitoring of the medium liquid level height to prevent overflow or material shortage from idling; Observe the intensity of chemical reactions and control process nodes such as fermentation, synthesis, and extraction; Check whether the medium crystallizes, clumps, or generates bubbles, and promptly detect abnormal problems such as pipeline blockages and mixing failures.
By relying on visual monitoring through mirrors, the frequency of equipment opening is significantly reduced, the safety risks of pressure relief, material volatilization, and toxic and harmful medium leakage are reduced, and the continuity and safety factor of the entire production line are improved.
三、 Application scenarios
1. Main application industries
Pharmaceutical raw material reaction kettle, oral liquid preparation tank; Dairy products, beverages, brewing fermentation tanks; Fine chemical synthesis kettle, acid alkali anti-corrosion storage tank; Environmental wastewater treatment dosing tank and flocculation reaction tank; Thermal boilers, pressure pipelines, and pressure vessels; Mixing equipment for oils, coatings, adhesives, etc.
2. Adapt to media and working conditions
Can tolerate media such as clean water, various acidic and alkaline corrosive solutions, organic solvents, high-temperature saturated steam, viscous paste, oil and gas mixtures, compressed air, etc. Conventional products have a nominal pressure range of 0.6MPa~1.6MPa and a working temperature range of -30 ℃ to 200 ℃. Non standard customized versions can achieve higher pressure and high temperature resistance, meeting the harsh production conditions of heavy industry.
四、 Installation, advantages, and daily maintenance points
1. Convenient clip on installation
During installation, weld two flanges on both sides of the opening of the equipment tank, insert glass and sealing gaskets, and tighten the outer ring bolts to fix it. This is a typical clamp type installation structure with simple disassembly and assembly. When the subsequent glass is scratched, aged, or bumped, there is no need to cut the tank body. The glass and gasket can be replaced separately by dismantling the bolts, with low maintenance costs and high replacement efficiency.
2. Outstanding advantages of the product
① The structure is sturdy, the overall rigidity of the flange is strong, and the pressure sealing performance is better than that of embedded small mirrors;
② There is a wide selection of visual calibers, with a complete range of standard specifications from DN50 to DN200, and support for non-standard customization based on drawings and samples;
③ Stainless steel material is rust resistant, easy to wipe and clean, and meets hygiene standards easily;
④ Highly versatile, compatible with domestic and foreign chemical equipment, in compliance with the NB/T47017 pressure vessel sight glass national standard and HG21505 chemical industry standard, and can also be produced for export according to the German standard DIN7080.
3. Precautions for simple maintenance
Glass is a brittle pressure bearing component, so avoid direct impact or knocking of the mirror glass with hard objects during use; Eliminate sudden temperature fluctuations inside the equipment to prevent glass from cracking due to thermal shock; Regularly check the tightness of bolts and the aging degree of gaskets, replace them in a timely manner if leakage or gasket hardening is found, and extend the service life of the entire set of mirrors.
