一、introduction

FYXFTQ series gas turbine flowmeter is absorbed the flow meters advanced technology at home and abroad through the optimized design, integrated the gas mechanics, fluid mechanics, electromagnetism theory and developed its own set temperature, pressure, and flow sensor and intelligent flow product calculate instrument in the integration of a new generation of high precision, high reliability of the gas precision measurement instrument, and have good low pressure and high pressure measuring performance, many signal output way of the disturbance of the fluid and low sensitivity, widely used in natural gas, coal gas, liquefied gas, gas light gas, such as measuring.

The product by the national quality inspection department GB3836.2000 explosion protection products according to the explosive gases for electric equipment of 1: general requirements ", GB3836.2-2000 "explosive gases with electrical equipment part 2: flameproof" d "" and GB3836.4-2000" explosive gases with electrical equipment part 4: "I" intrinsically safe standard of "qualified, explosion-proof sign for Exd Ⅱ BT4 (flameproof), Exia Ⅱ CT4 (the Ann model). Apply to contain Ⅱ A, Ⅱ B, Ⅱ C T1 ~ T4 temperature classes with explosive air mixture of 0 (only the Ann model) 1, 2 area dangerous places.