Metal Tube Flowmeters

SC250

© TT electronics plc

Issue C 02/2023 Page 1

TT Electronics | Roxspur Measurement & Control

2 Downgate Drive, Sheffield, South Yorkshire, S4 8BT, UK |Ph: +44 (0) 114-244-2521

www.ttelectronics.com | sheffield.admin@ttelectronics.com

General Note

TT Electronics reserves the right to make changes in product specification without

notice or liability. All information is subject to TT Electronics’ own data and is

considered accurate at time of going to print.

Features Continued:

•

Flow rate (model SC250)

•

Water: 16 l/h — 30m

3/h

•

Air: 500 NI/H — 900Nm

3/h

•

Accuracy: 2.5% (qG=50%) / 1.6% (qG=50%) on request

•

Connections:

•

Model SC250: DN15 — DN80

•

EN1092-1 or ANSI flanges. Other flange standards on request (JIS,…)

•

Threaded connections BSP or NPT

•

Other connections available on request

•

Materials: EN 1.4404 (AISI 316L), other materials available on request

•

Local indication

•

Options:

•

1 or 2 limit switches

•

Electronic transmitter with 4-20mA analog output for safe or hazardous area (EX ia IIC T4 or T6 protection,

ATEX certified). HART protocol available on request

•

Local volume totalizer. Remote volume totalizer by means of pulse output (not available for Ex transmitters)

Description:

Flowmeters are based in the variable area principle. The metering

system consists on a calibrated orifice and a conical float. The force

from the fluid, as it flows from the bottom to the top, displaces the float

until it reaches an equilibrium point that is a function of:

•

E = force of the fluid flow

•

Pf = weight of the float

•

AI = free area of flow

(AI= Ao, calibrated orifice area, - Af, float area)

Each float position represents an area between the float and the orifice.

This area corresponds to a flow rate.

Applications:

•

Water treatment plants, pulp & paper and food industry

•

Pharmaceutical, chemical and petrochemical industry

•

Power plants and nuclear generating plants

•

Heating and cooling circuits

•

Saturated steam circuits

•

Oven treatments and control of gas burners

Features:

•

Metallic tube with a robust construction

•

Indication by means of magnetic coupling

•

High performance measurement in extreme working conditions and high

resistance to corrosion

•

Low pressure drop

•

Damping mechanism to avoid float bounces in gas and steam applications

Ao = calibrated orifice area

Af= float area

Pf= weight of the float

E= force of the fluid flow

AI= Ao-Af = free area of flow