High Temperature Glass Tube Level Gauge

High Temperature Bi-Color Glass Tube Level Indicator-Tubular Level Gauge

level gauge

Basic Info.

Model NO.:GZS
Principle:Communicating Tube
Measurement Accuracy:±3mm
Structure:All in One
Warranty:1 Year
Export Markets:Global

Material:Ss304, Carbon Steel or Stainless Steel
Process Temperature:-190~425℃
Sight Glass Types:Glass Sheet Type or Glass Tubular Type
Connection:Flange or Screw
Glass Material:Quartz Glass or Borosilicate Glass
Export Markets:Global

Additional Info.

Packing:Wooden Case or Carton

Origin:Tianjin, China
HS Code:90261000
Production Capacity:3000PCS/Month

Product Description

We are one of the repute’s manufactures in China, we produce the level gauges and flow meters. Our products are Magnetic level gauges, glass tubular level gauges, glass sheet level gauges(transparent type and reflective type, sight glass level gauges), drop-in type level gauges, capacitive level gauges, level indicator, level transmitter and sensor. Flow meters: Metal rotary flow meters, vortex flow meters and turbine flow meters, electromagnetic flow meters, oval gear wheel flow meters, precession vortex flow meters and roots flow meters.

Tubular Level Gauges are designed to view liquid levels using clear or red line Borosilicate (Pyrex) tubing. All valves use a stuffing box configuration to seal the glass tube, and have a ball check shutoff to prevent loss of vessel contents in case of glass failure. Operating pressure and temperatures are subject to the limitations of the tubular gauge glass and washer composition; Consult with Pressure Products for gauge glass ratings.

Tubular level gauge is used for visual liquid level indication and is the most commonly used instrument in the process industry. It is a simple and reliable device for level reading in atmospheric or pressurized tank applications. It is mounted parallel, along the side of the tank, so as to form a closed loop. As the process level fluctuates, the level in the transparent glass tube changes accordingly and gives local level indication. The tubular gauge incorporates correct design, rugged construction, proper manufacturing techniques, skilled workmanship to give dependable performance and long service life. Material integrity is assured through strict compliance of chemical composition analysis in a standard laboratory.

One Structure and working principle
Flanges are added to meter with up and low valves. The flanges connect with tank and make a communicator with tank. Then the liquid level will be read from the Transparent glass tube or glass plate directly.

The upper and lower valves have steel ball inside. So if the glass plate or glass tube was broken by accident, the steel ball will block the channel under pressure, and to assure the container be sealed automatically which can prevent the liquid flowing out.

There is screw fixed on the valve ends. When sampling or repairing the meter, rotate the screw and dismounting the meter.


Flange diameter: DN20~DN500 ANSI JIS DIN
Flange type: A¬ ——-FF (Face Flange)
B——–RF (Raised face Flange)

Structure: “standard type” D——–“thermal type” W
Material: 1) Carbon Steel 2) Stainless Steel 3) PVC

Three Main technical parameters

Working pressure ≤ 16Kgf/cm3
Working temperature ≤ 100 º C (ordinary glass type), 450º C (quartz glass tubular type level gauge)
Needle valve closing pressure: ≥ 2Kgf/cm3, < 10MPa(quartz glass tubular type level gauge)
Thermal steam pressure ≤ 6Kgf/cm3
Glass tube size: Φ 19*3mm Φ 24 (quartz glass tubular type level gauge)
With drain valve(quartz glass tubular type level gauge)

L=C-C distance 500 600 800 1000 1100 1200 1400 2000
H=visible length 338 438 638 838 938 1038 1238 1838
I=glass tube length 458 558 758 958 1058 1158 1358 1958