Product Overview

ManualsBrandsCaleffi ManualsBalancing Valves1" Sweat Union FlowCal Automatic Flow Balancing Valve (7 GPM)

01166/09 GB

Compact automatic flow rate regulator

with polymer cartridge

127 series

Function

The

AUTOFLOW

devices are automatic flow rate stabilizers

capable of maintaining a constant flow rate of the medium as the

operating conditions of the hydraulic system change. They are used

to automatically balance the hydraulic system, guaranteeing the

design flow rate to each terminal.

This series of devices is fitted with an interchangeable flow rate

regulator, made of high resistance, scale resistant and low noise

polymer, for specific use in air-conditioning, hydraulic and domestic

water systems.

This special

AUTOFLOW

series is also supplied with a compact,

reduced size valve body for easy installation on individual terminals

or system zones.

Patent application no. MI2004A001549

Product range

127 series Compact automatic flow rate regulator, with polymer cartridge sizes 1/2” and 3/4”

CALEFFI

Technical specifications

Materials

Body: brass EN 12164 CW614N

Autoflow cartridge: high

resistance

polymer

Spring: stainless steel

Seals: EPDM

Performance

Medium: water, glycol solutions

Max. percentage of glycol: 50%

Max. working pressure: 16 bar

Working temperature range: 0–100°C

∆p range: 15–200 kPa

Flow rates: 0,12–1,6 m

Accuracy: ±10%

Connections:

1/2” and 3/4”

BS EN ISO 9001:2000

Cert. n∞ FM 21654

UNI EN ISO 9001:2000

Cert. n∞ 0003

Dimensions

1/2"

3/4"

Weight (kg)

0,24

0,25

Code

127141

127151

Summary of content (6 pages)

PAGE 1
Compact automatic flow rate regulator with polymer cartridge RE ® G IS D 127 series TERE BS EN ISO 9001:2000 Cert. n∞ FM 21654 CALEFFI UNI EN ISO 9001:2000 Cert. n∞ 0003 01166/09 GB Function The AUTOFLOW® devices are automatic flow rate stabilizers capable of maintaining a constant flow rate of the medium as the operating conditions of the hydraulic system change. They are used to automatically balance the hydraulic system, guaranteeing the design flow rate to each terminal.
PAGE 2
Circuit balancing Modern heating and air-conditioning systems have to guarantee a high level of thermal comfort with a low energy consumption. This means supplying the system terminals with the correct design flow rates, to produce balanced hydraulic circuits. Unbalanced circuits In case of an unbalanced circuit, the hydraulic umbalance between emitters creates areas with temperatures which are not uniform, and, as a consequence, problems with thermal comfort and higher energy consumption.
PAGE 3
AUTOFLOW® devices Function The AUTOFLOW® device has to guarantee a constant flow rate when its upstream/downstream pressure differential varies. It is therefore necessary to refer to the ∆p - flow rate diagram and to a basic diagram illustrating the operation methods and the relevant variable effects. Operating principle The regulating element of these devices is composed of a cilinder and a piston with side fixed and variable geometry orifices, through which the fluid flows.
PAGE 4
Construction details New polymer regulator The flow rate regulator is made entirely of high resistance polymer, specially chosen for use in air-conditioning and hydraulic systems. Its mechanical behaviour is excellent in a wide range of working temperatures, it features high resistance to the abrasion caused by continuous medium flow, it is insensitive to the deposit of scale and is fully compatible with glycols and additives used in circuits.
PAGE 5
Method of coding for AUTOFLOW® 127 series For proper identification of the device, fill in the form indicating: size, flow rate and ∆p range.
PAGE 6
Applications of AUTOFLOW® ( ) To create heat exchanger flow balancing by-passes To balance sanitary water distribution circuits. To control the amount of delivered water and balance the various circuits in irrigation systems. To limit the hot water flow rate delivered in systems with instantaneous production or limited capacity. For further details, consult Applications Sheets Nr. 04301, 04302, 04303 and the technical report "Dynamic Balancing of Hydronic Systems".