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MADDALENA WT TANGENTIAL HELIX WATER METER

WT is an excellent solution for high-volume irrigation metering. Using a tangential helix, it offers good metrological performance, wide measuring range and excellent resistance over time, even when used with irrigation water. Easy readability thanks to its IP68 copper-glass register. Robust, long lasting and designed for the most challenging environments, it is suitable for both drinking and irrigation water. It can be equipped with the latest remote data transmission technologies.

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Description Technical Data Dimensions & Communication modules

WT

TANGENTIAL HELIX WATER METER

• Woltmann tangential helix cold water meter
• Ideal for large volume irrigation applications
• Certified MID R max 40
• DN: 50÷300
• High protection against external magnetic fields
• Mineral glass lens
• Sealed register (IP68 copper/glass) to entirely prevent condensation issues
• Can be provided fitted with wired or radio communication module
• MID-certified also in the “delivery group” version (see specific illustrative material), and therefore part of a metering system that includes On-Off valve and flow limiter
• Ready for reed switch pulse emitter (DN 50÷125 mm 1P=100 L / DN 150÷300 mm 1P=1000 L)

TYPICAL ERROR CURVE

HEAD LOSS DIAGRAM

METROLOGICAL PERFORMANCE

Size	mm	50	65	80	100	125
	in	2	2 ½	3	4	5
Module B no.		IT-054-23-2213
Module D no.		0119-SJ-A010-08
Q3/Q1=R Referred to installation position		H-V = 40
MID standard performance**
Q₃	m³/h	40	63		100	160
Q₄	m³/h	50	78,75		125	200
R		40
Q₁	l/h	1000	1575		2500	4000
Q₂	l/h	1600	2520		4000	6400

*Other values of R available upon request

TECHNICAL DATA

Maximum permissible error
between Q₁ and Q₂ (excluded)

+/- 5%

Maximum permissible error
between Q₂ (included) and Q₄

+/- 2% with water temperature ≤ 30°C

Temperature class

T30

Flow profile sensitivity classes

U10 – D5

Head loss

ΔP10

Nominal pressure

bar

Maximum reading

m³

9.999.999

Minimum reading

0,002

Indicative weight

9,8

11,0

14,5

17,5

METROLOGICAL PERFORMANCE

Size	mm	150	200	250	300
	in	6	8	10	12
Module B no.		RO-2275-19454
Module D no.		0119-SJ-A010-08		NO MID
Q3/Q1=R Referred to installation position		H-V = 40
MID standard performance*
Q₃	m³/h	250	400	630	1000
Q₄	m³/h	312	500	878,5	1250
R		40
Q₁	l/h	625	1000	1575	2500
Q₂	l/h	1000	1600	2520	4000

*Other values of R available upon request

TECHNICAL DATA

Maximum permissible error between Q₁ and Q₂ (excluded)		+/- 5%
Maximum permissible error between Q₂ (included) and Q₄		+/- 2% with water temperature ≤ 30°C +/- 3% with water temperature > 30°C
Temperature class		T30
Flow profile sensitivity classes		U10 – D5
Head loss		ΔP10
Nominal pressure	bar	16
Maximum reading	m³	99.999.999
Minimum reading	l	0,02
Indicative weight	kg	25,5	35,0	63,0	86,0