DN25mm – Multi Jet Water Meters

RAHUL MJ water meter is a type of network oriented flow meter having a longer working life than most of its peers . This is a mechanical device having a magnetic coupling enabling frictionless movement to provide fault less and accurate reading .

Application –
Measuring the volume of cold potable water passing through the pipeline.

Sizes –
DN25mm

Register Type –
Available in Polycarobate and Copper Can

Feature–
Dry Type, Magnetic driven, anti magnetic function, pointer roller indicator, easy and long term clear
reading, frost resistance, long work life.
Dual alignment impeller for consistent movement
Strong magnetic coupling
Robust Cap and lid for supporting outside installations
Hydrodynamical balanced impeller chamber and the body
Modular design for any retrofitting needs of AMR/AMI devices
IP68 protected
Excellent accuracy curve
Long life guaranteed when used according to the correct engineering practices
Tamper proof fitment to avoid manipulations

Maximum Permissible Error –
In the lower zone from Qmin inclusive upto but excluding Qt is +5%.
In the upper zone from Qt inclusive upto and including Qmax is +2%.

Working Condition –
Water temperature – < 55 for cold water meter
Water pressure – < 1MPa or 1.6MPa optional (10bar or 16bar optional)

Upon Request –
Remote transmission device can be added on request
Pulse output 10L/Pulse

Note – Technical data conforms to Indian Standard 779:1994, MID CE&International Standard ISO:4064 as follows

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Dimensions
Type	Size (mm)	Length (mm) (Tol.= 0, -2)	Length with nipple (mm) Tol= ±5	Width (mm) W Tol = ±1	Height (mm) H Tol= ±2	Connecting Thread D
Multi Jet Class B	15	165	250	83	97	G 3/4B
	20	190	290	83	101	G 1B
	25	260	380	99	117	G 1.25B
	40	300	430	210 (Max)	375 (Max)	G 2B
	50	330	470	124	139	G 2.50B

Technical Specification
Normal Size DN(mm)	Class of measurement	Overload Flow-rate Q_max(m³/h)	Permanent flow-rate Q_n(m³/h)	Transitional flow-rate Q_t(l/h)	Minimum flow-rate Q_min(l/h)
15	B	3	1.5	120	30
20	B	5	2.5	200	50
25	B	7	3.5	280	70
40	B	20	10	800	200
50	B	30	15	1200	300

Sr. No	Specifications	Dimensions	Tolerances
1	Overall length with Nipples (Lt)	250	±5
2	Overall length without Nipples (L)	165	0, -2
3	Total Width (W)	83	±1
4	Height (H)	97	±1
5	Threads (Nipples, Tn)	G1/2"B	Via Go/No Go
6	Threads (Body, Tb)	G3/4"B	Via Go/No Go

MATERIALS FOR BODY AND COMPONENT PARTS OF DOMESTIC WATER METER, SIZE 15, 20 & 25 MM
S.No.	Body / Component parts of water meter	Material used
1	Body	Brass
2	Registration Box	ABS
3	Registration Box Cover (Visual)	Polycarbonate
4	Cap/Cap lid	ABS
5	Screws & Studs	High tensile brass
6	Strainer	HDPE
7	Impeller	Acetal Polymer (Delrin)
8	Chamber	ABS
9	Impeller Shaft	Stainless Steel
10	Nipples & Nuts	Brass
11	Bearings	Sapphire (Synthetic)
12	Dial & Counter	ABS