Flow Indicators EN 655

ELESA original design
code: HVF

Standard Sheet EN 655 Print This Page Plastic Characteristics

Product description

With flow indicators EN 655, a rotor rotates above a minimum volume flow rate Q, depending on the medium and its viscosity. The flow rate is visible from all sides.

They have a high chemical resistance and are therefore also suitable for fluids containing glycol. Please contact us for further information about media and pressure resistance. The maximum usage temperature is 212 °F (100 °C).

The flow indicator can be mounted in any position. The direction of flow and the installation position are irrelevant.

Specification

Sight glass
Borosilicate glass (Pyrex^®)

Temperature resistant up to 212 °F (100 °C)
Highest chemical resistance

Rotor
Plastic
Technopolymer (Polypropylene PP)
RedRT

End pieces
Plastic
Technopolymer (Polypropylene PP)

Black, matte finish
Tapped inserts
Brass

Connecting element
Brass, nickel plated / steel, zinc plated

O-rings
Rubber NBR (Perbunan^®)

RoHS

On request

Rotor in blue color
Tapped inserts with NPT thread
Tapped inserts in stainless steel AISI 316

Selected Part

Part Number	d Pipe thread	l₁	b₁	b₂	l₂	s	Max. flow volume in l/min	Max. permissible operating pressure in bar	≈ Required minimum volume flow rate Q in l/min Water	Hydraulic oil (HPL 22)	Hydraulic oil (HPL 64)	Max. pressure drop due to the flow indicator in bar

655-G1/4-66-RT	G 1/4	2.60	1.73	1.06	0.87	0.79	10	25	0.6	2.5	3.5	0.15
655-G3/8-92-RT	G 3/8	3.62	2.36	1.57	1.42	1.10	20	15	1.2	3	4	0.25
655-G1/2-92-RT	G 1/2	3.62	2.36	1.57	1.42	1.10	40	15	1.2	3	4	0.3
655-G3/4-114-RT	G 3/4	4.49	2.76	2.76	1.81	1.81	60	15	2.1	3.7	5	0.17
655-G1-114-RT	G 1	4.49	2.76	2.76	1.81	1.81	80	12	2.1	3.7	5	0.15

d Pipe thread	l₁	b₁	b₂	l₂	s	Max. flow volume in l/min	Max. permissible operating pressure in bar	≈ Required minimum volume flow rate Q in l/min Water	Hydraulic oil (HPL 22)	Hydraulic oil (HPL 64)	Max. pressure drop due to the flow indicator in bar

G 1/4	2.60	1.73	1.06	0.87	0.79	10	25	0.6	2.5	3.5	0.15
G 3/8	3.62	2.36	1.57	1.42	1.10	20	15	1.2	3	4	0.25
G 1/2	3.62	2.36	1.57	1.42	1.10	40	15	1.2	3	4	0.3
G 3/4	4.49	2.76	2.76	1.81	1.81	60	15	2.1	3.7	5	0.17
G 1	4.49	2.76	2.76	1.81	1.81	80	12	2.1	3.7	5	0.15