Gas Flow Meter

The  gas meter is a high precision instrument for gas volume
measurement and flow measurement of natural gas and other non-aggressive gases in gas stations and plants. The  rotary gas meter is applicable in residential and office buildings as well as commercial and industrial plants.

FEATURES

• Meter sizes G10 to G1000.
• Flow rates from 0.5 to 1600 m3/h.
• Nominal sizes from DN25 to DN200. 
• Temperature range -25°C to +55°C. 
• Pressure ratings PN10/16 and ANSI Class 150.
• Measuring range standard 1 :50 (G25 1 :80) , optional up to 1 :200.
• Anodized high strength aluminum meter housing 
• Synthetic material Index head, optional Aluminum index head.
• Rotating counter (355°). 
• No inlet or outlet straight pipe required. 
• Horizontal and vertical mounting position.

Description and operation

The  rotary gas meter registers the operating volume using an eight-digit mechanical counter. Via pulses the operating volume can be transferred to an electronic volume corrector and converted to normal or standard conditions.The TYL rotary meter is approved for custody transfer according to MID (2004/22/EC) I OIML.

Rotary gas meters are operating according the displacement principle. In the meter housing are two 8-shaped coordinated rotating pistons without touching each other. The measuring chamber is regularly filled and emptied by the rotation. During each revolution four crescent-shaped volumes are moved through the measuring chamber, in which the rotation speed is proportional to the gas flow. The rotation of the pistons is synchronized by a gear train outside the measuring chamber (*Exception is DN 100)

The actual volume flow can be transmitted to electronic volume correctors or data loggers via low frequency (LF-) pulses generated by Reed contacts. In the meter''s index head is also located an anti-tampering contact.

Rotary gas meters are characterized by a very compact design and high accuracy. The  rotary meter requires no inlet or outlet pipe and is insensitive to severe gas flow fluctuations (discontinuous operation).

♦ high precision, good repeatability, small pressure loss and good seismic performance;

♦ Adopt high-quality bearings, with small friction resistance, good sealing performance and long life;

♦ integrating microprocessor, flow sensor, high-precision temperature and pressure sensor, directly measuring the flow, temperature and pressure of the gas to be measured, and automatically performing flow tracking compensation and compression factor correction calculation;

♦ The instrument has pulse signal and analog signal output, and can directly realize centralized collection and real-time management of computer data through RS485 communication interface or GPRS system.

♦ The power consumption is low and can be supplied by internal battery or external power supply.

It has the function of real-time data storage, which can prevent data loss during battery replacement or sudden power failure, and internal data can be stored permanently in the power failure state.

♦ It can be used with IC card prepayment system to facilitate trade settlement;

♦ The explosion-proof marks of explosion-proof products are EXIBIT 4 and EXIBIT 6

 Gas Flow Meter Technical Performance