OVD Type Flow Detector

The maintenance-free mechanical detector is designed to detect and signal increased water flow in pipelines. Optionally, it can be equipped with a control valve for flow shut-off in the pipeline. Detectors are always designed according to individual customer requirements.

Diameter:

Nominal diameters: DN100 mm and DN150 mm.

Pressure:

Operating pressure range: 2.5 to 100 bar.

Medium:

Water - temperature up to 70°C / other applications and media available upon request.

Flow Detector Design

Operation Description:

An active lever with a plate is positioned inside the pipeline.
The torque from the water pressing against the lever's plate is transferred via a shaft (with bearings) to a counterweighted lever.
The size of the counterweight is calibrated during testing to ensure the lever deflects at a precisely defined flow rate.
The deflection of the lever activates a limit switch and an optional hydraulic valve.
In the deflected position, the lever is secured by an optional lock, which is released manually.
An optional damper minimizes lever deflection caused by momentary flow disturbances.

Additional Equipment

A - Lock
B - Damper
C - Hydraulic valve

Standard and Optional OVD Detector Equipment

Standard Equipment:

Limit switch for signaling increased flow

Optional Equipment:

Hydraulic control valve for the shut-off valve in the pipeline
Cabling and terminal box
Additional hydraulic and electrical equipment
Oil damper
Lock
Adapter for mounting on non-standard connections

Materials

Basic materials used in our products. Other materials may be used according to customer requirements and their suitable application.

Element	Type	Material
Body		1.4021 / 1.4313 / 1.4418
Shafts, Pins		1.4021 / 1.4313 / 1.4418
Bolts, nuts	Contact with Water / Air	A2-70 / A4-80
Bearings	-	-
Internal Lever	Plate	1.4301
Counterweight and External Lever	Plate	Carbon steel, optionally stainless steel