RAY FS WP 457

FLOW SENSOR | MECHANICAL

Volume measuring component for measuring heat.

Facility for remote transmission of flow rates
Encapsulated and evacuated counter
Counter can be rotated as required for easier reading
Easily replaceable reed switch
The reed switch is fitted with a 100 Ω, ¼ W protective resistor (cable length 3 m). Can be ordered without series resistor
Contact rating (without series resistor) max. 24 V (SELV) 0.2 A
Outstanding long-term accuracy achieved by mounting vane in ring saphire and carbide bearing
Sealed shield protects against magnetic interference
Very low pressure loss
Approved according MID in class 2 and 3
Completely dry-running

Nominal diameter	DN	mm	50	65	80	150	200
Nominal flow rate	q_p	m³/h	15	25	32	200	200
Overload flow rate (short term)		m³/h	60	60	90	400	500
Maximum flow rate	q_s	m³/h	30	30	45	300	300
Minimum flow rate	q_i	m³/h	1.5	2.5	3.2	20	20
Starting flow rate		l/h	130	130	400	1500	2000
Pressure loss at q_p	Δp	bar	0.02	0.02	0.01	0.05	0.002
Flow resistance coefficient Zeta			0.9	0.9	0.65	1	0.13
Pulse value reed switch ¹		l/pulse	100	100	100	100	100
Metrological class		q_p / q_i	10:1 ²	10:1 ²	10:1	10:1	10:1
Flow rate at 0.1 bar pressure loss		m³/h	35	56	102	280	1414

¹other pulse values on request
²other q_p / q_i on request

Nominal diameter	DN	mm	50	65	80	150	200
Overall length	L	mm	200	200	200 / 225	300	350
Flange diameter	D	mm	165	185	200	285	340
Hole circle diameter	K	mm	125	145	160	240	295
Number of screwholes		pcs	4	4	8	8	8 / 12
Screwhole diameter	D1	mm	18	18	18	22	22
Height	H	mm	75	82.5	94	135	163
Height (without counter extension)	H1	mm	141	141	141	244	244
Height (with counter extension)	H1	mm	182	182	182	284	284
Diameter	ØB	mm	150	150	150	285	340
Weight		kg	11.1	11.6	12.5	39	49

Pressure loss graph / Typical error graph

Pressure loss graph

Typical error graph