Thermal fire flow control switch dn150 intelligent exploration proof water pressure flow sensor supplied

Characteristics1. Effectively prevent angle

2. Fully waterproof shell design

3. Suitable for a wide range of pipe diameters and can be adjusted accordingly

4. The indicator light directly displays changes in flow rate

Main technical parameters

Measurement range: Water: 0.03-3 m/s Oil: 0.03-3 m/s Gas: 2-20 m/s Withstand voltage: 4 M P a (special 60 M P a) Connection method: Thread G 1/2 ^ ^ ^, G 1/4 ^ ^ ^ ^, otherSwitching time: O N: typical ≥ 4 s (1-13 s) O F F: Typical ≥ 4 s (1-15 s) Temperature change reaction time: ≤ 12 seconds Working voltage: D C 24 V, A C/D C 2 20 VPower consumption: 2 W (24 V DC), 3 W (220 V AC/DC) Output: Relay, N P N/P N P outputContact capacity: 0 4 A/1.25 V A C, 2 A/30 V D CInsulation impedance: 50 M Ω at 100 V D CProbe material: 304 stainless steelShell material: P PWorking temperature: -10 ℃~60 ℃ Environmental conditions: -20~85 ℃, ≤ 85% R HProtection level: I P 67

The FCT type flow switch can easily set the flow alarm node, unscrew the protective thread, and adjust the bottom knob with a threaded knifeSet the flow alarm point. For flow switches with output forms of PNP, NPN, and relays, the meaning of their LED indicators is as follows: - Red light on, flow rate lower than set (transient not conducting/relay not acting) - Yellow w light on, Flow rate equal to or higher than set (transient conduction/relay action) - The flow rate of the yellow and green lights exceeds the set level (green lights 1, 2, 3, or 4 lights up together with the yellow light)

Structure Description

Installation instructions

Product factory packaging and accessories

Knowledge extension:

What is the function of the fire flow switch?

The function of the fire flow switch is a question that everyone can talk about, but it cannot be fully explained Today, let's take a look at the following introduction together

Fire flow switches can be considered as a branch of flow switches, and the following content comes from the general category of flow switches

A flow switch is a device that monitors the flow of air, steam, or liquid It sends a ^ ^ trip signal ^ ^ to different devices in the system, such as pumps The flow switch can indicate which pump is turned off or on. Some are commonly used for pump protection, cooling circuit protection, and alarm for high or low flow

Purpose

The supplier of liquid and air flow switches, Sunac Industrial (Shanghai) Co., Ltd., has provided an example that can be used for fire flow switches (for details, please refer to Case 1 of on site installation and debugging of fire flow switches) Liquid flow switches can be used for air conditioning, hot water space heating systems, pump systems, water cooling equipment, mixing or additive systems, liquid transfer systems, fire sprinter systems, water treatment systems, swimming pool chlorination, and industrial laser coolant systems The air flow switch can be used in clean room filtration systems, induced heating, exhaust ventilation, air supply systems, and air handling systems

Process Definition

Flow refers to the physical movement (velocity) of liquid, gas, or steam in a pipeline, causing the switch to activate No flow means a decrease in speed, or some times a complete stop, allowing the switch to return to its original position

Function

The flow switch can perform specific functions as needed For example, it can stop the motor when there is no flow, start the motor when there is flow, issue an alarm when the flow stops, or turn off the alarm when the flow is appropriate

Precautions

For liquid flow rate, according to Seil Enterprise's calculations, the measurement flow rate is inferred by calculating the ^ ^ change in liquid velocity or kinetic energy ^ ^ The speed depends on the pressure difference that forces the liquid to pass through the pipeline or duration Since the cross sectional area of the pipeline is known and remains constant, the average speed is an indication of the flow rate The flow rate needs to be determined to set the flow switch to the predetermined closing function

Type

Recording to the internet, several different types of traffic switches can be found

The blade operated flow switch utilizes fluid to drive the blades in the liquid flow When the flow rate drops below the preset level, it will trigger the ^ ^ internal magnetic coupling and mechanical switch drive rod ^ ^ according to the on site situation, causing the operating switch to trip The variable area flow switch uses several methods to activate the switch, which has an internal piston Flowing into a port generates pressure on the magnetic lift valve When the flow pressure reaches the set value, the switch closures

The ultrasonic (Doppler) flow switch is connected to the outside of the pipeline When a change in flow is detected, it uses an ultrasonic sensor to send an ultrasonic signal A thermal diffusion flow switch is a detector that measures the temperature difference of a liquid or gas when passing through a sensing element and triggers a signal when a change is detected