sight glass with nozzle Weld

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Description:

The sight glass with nozzle Weld is used to see the level of the liquid in a vessel or tank. The gauges are used as a single unit or stacked up in multiple sections to view a desired height of liquid in a vessel or tank. Standard units are furnished with 1/2" or 3/4" NPT female-end connections. The Reflex can also be furnished with other connections (socket weld, flanged, sanitary, or as specified) as well as with various types of valves upon request. Reflex liquid level gauges is no reason to observe the media, easy level reading.

Assembly Instructions

This unit was assembled at the factory and is ready for installation. The sight glass should be visually checked for any possible damage during shipping. After the unit has been installed and brought to operating conditions, it should be inspected for any possible leakage.

REMOVAL OF LENS: Remove the cap screws (1) and remove the retainer cap (2). The o-rings or packing (3) is usually removed with a screw type packing remover. If the unit has been in operation the o-rings or packing will be damaged upon removal and must be replaced to provide a proper seal. The lens (4) can be removed, once the o-rings or packing are removed.

SPARE PARTS: The spare parts consist of gaskets, o-rings or packing and lens if needed. Remove any deposits from the bottom seat. Place one gasket (5) on bottom seat. Place lens (4) on gasket. Place the o-rings or packing (3) into the space between the outside of the lens and the inside of the body (6). Place the remaining gasket (7) on top of the lens. Place the retainer cap (2) in position and install the cap screws (1). Tighten down cap screws approx. 30-40 ft-lbs incrementally using proper torquing procedures to ensure even sealing. It is not necessary to achieve metal to metal contact of the body and cap upon assembling the sight glass. Then tighten down the set screws (not shown in drawing) to keep a preload and help prevent loosening of the cap screws. Should leakage occur, loosen the set screws and follow the tightening procedure until leakage has stopped.

Application Scenarios of Welding glass level gauge

Welding glass level gauge (also called welded strip sight glasses) are directly welded to tank and vessel walls as integrated observation windows. Featuring a long continuous viewing area, leakproof welded connection and high pressure resistance, they are widely used across multiple industries for liquid level tracking and internal process monitoring.

1. Chemical & Petrochemical Industry

Vertical/horizontal storage tanks for acid, alkali, solvent, crude oil and refined oil
Batch reactors, blending kettles, sedimentation separators and distillation tanks
High-temperature medium buffer tanks, waste liquid treatment vessels
Working advantages: 304/316L/Hastelloy anti-corrosion frames; reflex/transparent glass optional to observe liquid layering, precipitation, foaming and real-time liquid height continuously over a large range

2. Thermal Power & Industrial Boiler Auxiliary Equipment

Deaerators, high/low pressure feedwater heaters, condensate recovery tanks
Waste heat boilers, steam flash tanks and heating station expansion tanks
Replace segmented glass plate level gauges to achieve full-range continuous water level observation without blind zones; withstand saturated steam temperature and medium pressure, stable for long-term continuous operation

3. Food, Beverage & Pharmaceutical Sanitary Production

Fermentation tanks, syrup mixing tanks, edible oil storage vessels, beverage brewing tanks
Pharmaceutical reaction tanks, liquid medicine preparation tanks, sterile buffer tanks
Polished stainless steel welded frames with sanitary PTFE gaskets, no dead corners for residue accumulation; easy CIP online cleaning, comply with food & pharmaceutical hygiene standardsAlibaba.co...

4. Environmental Protection & Water Treatment Equipment

Sewage reaction tanks, sedimentation tanks, filter tanks, desulfurization/denitrification absorption towers
Pure water tanks, circulating water buffer tanks, underground integrated wastewater equipment
Low-cost carbon steel welded versions for normal-temperature water media; operators observe turbidity, suspended solids and liquid level changes directly without extra sensors

5. Metallurgy, Cement & Waste Heat Recovery Equipment

Kiln waste heat recovery tanks, cooling water circulation tanks, pickling tanks
High-dust, slight vibration industrial vessels; borosilicate tempered glass resists thermal shock, avoids cracking under frequent temperature fluctuation

6. Special Low/Medium Pressure Pressure Vessels

Refrigeration liquid ammonia storage tanks, heat conduction oil storage tanks
Small pressure vessels without space for side-mounted glass plate level gauges
Welded integrated base eliminates flange leakage risk, high structural strength, meets ASME and domestic pressure vessel manufacturing codes

7. Pipeline & Large-diameter Process Pipe Inspection

Long horizontal process pipelines requiring continuous flow observation
Used to check medium flow rate, bubble generation and impurity clogging inside pipes

Core Matching Working Condition Features

Welded integral base, permanent connection with tank wall, fewer leakage points than flanged sight glasses
Customizable long viewing length (250–1000mm), full liquid level range monitoring without blind spots
Dual options: transparent glass for colored/turbid media; reflex glass for clean colorless liquid with high-contrast black-white interface
Multiple material combinations: carbon steel for water/oil, stainless steel for corrosive/hygienic media, alloy for strong acid & alkali
Simple disassembly for glass replacement without cutting the vessel body, low maintenance cost

Short Brochure Summary

Welded rectangular sight windows adopt direct welding installation with continuous long viewing slots. They are widely applied on chemical reactors, boiler deaerators, food fermentation tanks, environmental sewage tanks and various pressure storage vessels for full-range liquid level reading and real-time internal process observation, with excellent leakproof performance and wide temperature-pressure adaptability.