WIKA LGG 可視玻璃液位指示器
Sight glass level indicator
Applications
■ Heat transfer and refrigeration systems
■ Plant for cryogenics
■ Steam boilers
■ Process industries: chemical plants, refineries, offshore, oil and gas, power plants
Special features
■ Pressure rating PN 6 ... 250
■ Operating temperatures from -200 ... +450 °C
■ Carbon steels and stainless steels, suitable for pressure vessels in accordance with EN or ASME
Debion
The model LGG sight glass indicator serves as a direct display for fluids and can be fitted with reflex or transparrent sight glasses, or with mica. For light-dark contrast, the refrb principle is used. For pressures under 25 bar, a glass tube display is used.
The model LGG sight glass indicator consists of a core in a glass holder, also known as a backplate. Incorporated into this backplate are the fluid channel (and if necessary the heating channel) and the seating face for the integral sealing and sightglasses.
The glasses and/or mica discs as well as the seals are fitted, secured and sealed with the aid of screws and a cover.
Glasses are used in accordance with DIN 7081, meaning to max. temperatures of 243 °C (280 °C with mica design) for steam, up to 300 °C for other media, to 450 °C in specia circumstances.
For the sight glass plates, for glass quality, only borosilicate glass is used. Outside of these operating conditions the natural material mica is used.
The connection to the process is generally made with valve heads with single or double isolation. Drain valves enable the sight glass indicator to be emptied and are fitted to the lower flange face. If necessary, a vent valve can be fitted at the top.
The specifications given in this document represent the state of engineering at the time of publishing.
We reserve the right to make modifications to the specifications and materials.
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