RAY FS WS MID

MECHANICAL FLOW SENSOR

Application

RAY FS is a Woltman volume measuring device with a built-in pulse transmitter to measure heat for billing hot water consumption (max. 120°C).
Its impeller axis is perpendicular to the pipe. It is particularly sensitive at low flowrates which increases the dynamic range of measurement.

Features

MI004 approval in class 2 with a dynamic range of 25:1 (qp:qi)
Complete range from DN50 qp 15m³/h to DN150 qp 150m³/h
Remote transmission of quantities of flow (3m cable), compatible with calculators with pulse input
Horizontal installation only
Register can be rotated as required for easier reading
Very low pressure loss
Encapsulated and waterproof meter
As a safeguard against magnetic influences, a sealable antimagnetic screen is fitted on the meter
Temperature range: 15°C to 120°C

RAY FS WS

General

Application			Heating
Mounting position			Horizontal
Medium temperature range		°C	15 ... 120
Ambient temperature		°C	5 ... 55
Ambient class			E1 + M1
Nominal pressure	PN	bar	16¹
Protection class			IP 54
Approval			MID (DE-15-MI004-PTB010)

¹special version on request

Technical data

Nominal diameter	DN	mm	50	65	80	100	150
Nominal flow rate	q_p	m³/h	15	25	40	60	150
Maximum flow rate (short-term)	q_s	m³/h	30	30	50	75	187.5
Minimum flow rate	q_i	l/h	600	1,000	1,600	2,400	6,000
Starting flow rate		l/h	60	60	90	90	1,000
Pressure loss at q_p	Δp	bar	0.06	0.14	0.09	0.07	0.09
Pulse value reed switch ¹		l/pulse	100	100	100	100	1,000
Dynamic range ²	q_p / q_i		25:1	25:1	25:1	25:1	25:1

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

Display range

Nominal diameter DN mm 50 65 80 100 150
0.5 l ... 999,999 m³ • • • •
5.0 l ... 9,999,999 m³ •

Dimensions

Nominal diameter	DN	mm	50	65	80	100	150
Overall length (DIN 19625)	L	mm	270	300	300	360	500
Overall length (DIN ISO 4064)	L	mm	300	300	350	350	500
Flange diameter	D	mm	165	185	200	220	285
Hole circle diameter	K	mm	125	145	160	180	240
Number of screwholes		pcs	4	4	8	8	8
Screwhole diameter	D1	mm	18	18	18	18	23
Height	H	mm	84	97	102	113	155
Height (without counter extension)	H1	L	155	155	190	200	400
Height (with counter extension)	H1	mm	195	195	230	240	440
Diameter	Ø B	mm	165	185	200	220	285
Weight		kg	14.2	18	24	28	79.5

Pressure loss graph / Typical error graph

Pressure loss graph

Typical error graph