FS51 Liquid Flow Switch

FS series liquid flow switch is designed for managing the flow changes when the liquid flows in the pipe, such as water, ethylene glycol or other non-hazardous liquids. When the liquid flow is higher or lower than the setting value, the single-pole double- throw contacts (SPDT) can get through one circuit and at meantime to break the other circuit. FS series liquid flow switch is commonly used for chain reaction or “no flow” protection.

Features

1)  Max liquid pressure: 1 MPa, can be used in multiple applications.

2) There are 3 stainless steel paddles, can be used in 25 to75mmdiameter pipe.

3) Number of paddles is changeable and length of paddle is trim-able according to customer requirements.

4)With additional 6" paddle, FS series liquid flow switch can be used in 100 to150mm diameter pipe

5) Adjustable flow setting, Users can set the flow value according to their requirements.

 FS51 can also be provided with stainless steel connection, which is suitable for ammonia and other medium.

Application

The typically application is used to protect the cooling system, when the cooling water is off, FS flow switch can shut off the compressor current efficiently in order to protect the freezer and entire system from being damaged.

Specification (FS flow switch)

1. Above flow values are for the reference of choice

2. The figures with “ * ” symbol are for the 4 paddles flow switch. While, the figures without “ * ” symbol are for the 3 paddles (1, 2, 3 ) flow switch.

3. The paddles will be chose according to the flow in the main pipe where the flow switch is installed in.

Performance                 Parameter

Electric load :                             AC250V  10A

Max working pressure:            10.34Bar

Flow temperature:                     0-120℃

Environment temperature:       0-60℃

The endurance of bellows:     500000 cycles

Ingress protection:                    IP53

Installation

1. Pipe connection: FS series flow switch be provided with 1", 1/2", 3/4" NPT connections.

2. The arrow direction in the cover must be as same as the flow direction in the pipe.

3. The flow switch is suggested to be installed on horizontal pipes, if it have to be on vertical pipes, then the direction in the pipe must be upward flow. It is not allowed to be installed on the vertical lines with downward flow.

4. To avoid the paddle damage, flow reversal is not allowed when the flow switch is working.

The paddle trimming figure

Attention: the paddles with “ * ” symbol are installed in factory/

               the paddle with triangle symbol is the additional paddle.(not installed)

               the balance paddles are for trimming

                when install the trimmed paddles, the end of paddle should keep 5-10mmdistance from the pipe                     end and no friction with the pipe

Wiring diagram

Typical installation drawing