www.emis-kip.ru/ru/prod/ev200 4
1 DESCRIPTION AND OPERATION
1.1. Intended use of the flow meter
1.1.1 Flow transducer is designed for measuring flow and volume of liquids, gases (natural, associated
petroleum gas, air, oxygen, etc), saturated and superheated vapour, corrosive mediums under working pressure
and temperature and can be applied in different manufacturing spheres and as a part of heat, gas, steam
metering systems.
Flow transducer of PPD version shall be used as part of reservoir pressure maintenance systems, for
measuring of Senomanian water or other liquids under high pressure.
Flow transducers can be used as part of automatic control and monitoring systems and local automation
schemes using a pulse frequency signal under GOST 26.010, current signal under GOST 26.011 and digital
signal ModBus (RS485, USB) and HART.
1.1.2 By the measurement method, the transducers are divided into full bore (EV-200) and submersible
(EV-205). There are two types of installation on the pipe:
- non-flange, wafer type, code C or C1, for 15mm to 300mm pipe size;
- flange, code F or F1, for 15mm to 300mm pipe size;
- flange with integrated reducer, code FR or FR1, for 25mm to 100mm pipe size;
- clamp connection, code T, for 50mm to 80mm pipe size;
- for reservoir pressure maintenance systems, code PPD, for 50mm, 80mm, 100mm and 150mm pipe
size. Submersible transducer EV-205 has installation code PR for 300mm to 2000mm pipe size.
Measuring method of EV-205 corresponds to GOST 8.361.
1.1.3 Flow meter is designed for measuring flow and volume of medium corresponding the the below
parameters:
1) temperature range from -60 to +450ºС; temperature ranges and corresponding flow meter types are
given in table 1.1.
Table 1.1 Temperature versions
Version Code
Note: * As special order, the minimal temperature can be decreased to -60 ºС, except for ex-proof versions RV,
RVI, RO.
2) exessive pressure:
- max 25 MPa for C version;
- max 16 MPa for F1 version;
- max 6,3 MPa for C1, F, FR, FR1 versions;
- max 4.0 MPa for T version;
- max 4.0 MPa for PR version;
- max 25 MPa for PPD and X versions (special version).
3) solid particles shall not exceed 250 mg/m3 for gases and 1g/l for liquids;
4) gas inclusions in liquid shall not exceed 2,5% of the volume for 0,5% accuracy version and 4% for
1,5% and 1% accuracy flow meters. When the content of gas inclusions is up to 10% by volume, the total
relative error does not exceed ± 5%;
5) dynamic viscosity for liquids shall not exceed 7mPa*s;
6) measuring liquid shall not be corrosive to flow tubes.
1.1.4 General purpose flow transducers shall be used in explosion proof environment.
Flow transducer of explosion proof configuration Вн is intended for use in explosive environment with
explosive mixtures of IIC type, and has explosion safety called "explosion proof enclosure" and 1Ex d IIC(T1-
T6)Gb X marking.
Flow transducer of explosion proof configuration ЕхВ intended for use in explosive environment with
explosive mixtures of IIB type, and has explosion protection called "intrinsically safe circuit" and 1Ex ib IIB(T1-
