Upper unit

APPLICATION This type of water meter is impeller water meter with magnetic transmission and used to measure the total quantity of cold potable water which consumed in household or a resident unit, passing through the pipeline.This type of water meter is the world’s favorite domestic water mete. FEATURES Multi-jet velocity meters, Easy readable rollers indicator. Magnetic drive, dry-dial, vacuum sealed register, frost resistant, keeps clean reading for long time. High sensitivity of measuring accuracy, the starting flow rate of the meter size DN15mm is 4 liters or less. All the materials in contact with water, consciously selected by the known resistance to corrosion. Internal parts injected from high quality polymers. Stainless Steel pivot for impeller. The impeller is the only moving parts in contact with water permitting the most reliable. The indicator mechanism has 5 digits and 4 pointers, 8 digits and 1 pointers for option. External adjustment device, inlet strainer, outlet non-return valve for selecting. CONSTRUCTION The meter mainly consists of a body, a measuring chamber, a indicator unit, a retaining ring with lid. The retaining ring secures the internal parts. WORKING PRINCIPLE The water flows through the meter’s strainer and into the measuring chamber where it drives the impeller. A drive magnet transmits the motion of the impeller to a driven magnet located within the sealed indicator. The magnet is connected to a gear train which translates the impeller’s rotation into volume tantalizations displayed on the register dial face. COMPLIANCE WITH STANDARD Technical data conforms to ISO 4064:2005 Standard for horizontal installation. Threaded connections comply with BSP Standard. WORKING CONDITIONS Working temperature Class: T30 or T50 for cold water meter Working Pressure Class: MAP10 or MAP16 Pressure Loss Class: P63 Upstream Disturbance Class: U5 Downstream Disturbance Class: U0 ACCESSORIES Every water meter will complete with 2 couplings, 2 nuts, 2 coupling gaskets and 2 spud thread protectors. MAXIMUM PERMISSIBLE ERROR In the lower zone from Q1 inclusive up to but excluding Q2 is: Cold potable water meter ± 5% In the upper zone from Q2 inclusive up to and including Q4 is: Cold potable water meter ± 2% INSTALLATION REQUIREMENTS Step-1: The meter should be installed inHORIZONTALposition with the direction of the flow as indicated by the arrow cast in the meter body with the register face upwards. Step-2: Pipeline must be flushed before installation. Step-3: The meter should be constantly full of water during operation.

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