ITV2010 ITV2011 ITV2031 ITV2050 ITV2090 brake proportioning valve Vacuum pressure switch adjustable pressure switch

Product Overview

Description

ntroduction to electric proportional valve:

DFL electric proportional valve is based on the size of the control signal to adjust the valve core section area.So as to achieve the goal and requirement of adjusting the flow rate.

Electrical proportional valves can be divided into two types of flow control.One is the switch control, one is continuous control, servo valve and other valves are different, its energy loss is greater, because it needs a certain amount of flow to maintain the pre-stage control oil work.One is the switch control: either fully open, or fully closed, flow or maximum, or minimum, no intermediate state, such as the ordinary solenoid through valve, solenoid directional valve, electro-hydraulic directional valve.The other is continuous control: the valve mouth can be opened according to the needs of any opening, so as to control the flow through the size, this kind of valve has manual control, such as throttle valve, also have electric control, such as proportional valve, servo valve.The electric proportional valve controls the gas pressure through the electric signal, which can realize the continuous and stepless adjustment of the gas pressure, and can realize the remote control and program control.

Advantages of electric proportional valve:

1) electric proportional mode, realizing non-pole control of outlet pressure.

2) it can realize remote control and program control.

3) compared with intermittent control, the system is simplified and the components are greatly reduced.

4) compared with hydraulic proportional valve, small volume, light weight, compact structure, lightweight, low cost, but the response speed is much slower than the hydraulic system, more sensitive to load changes.

5) low power consumption: less than 4W (communication form).

6) no fire, no pollution.It is less affected by temperature change.

 

Pneumatic proportional valve in the use of common problems:

1. We are considering NITV2000 or 3000 series DFL proportional valves.If only the specified pressure is output, which type is appropriate?

The NITV series of electrical proportional valves are standard in the 4 - or 16-point preset input type.4-point preset input type with a 2-point ON/OFF combination of input signals, the preset pressure can output up to 4 points.16-point preset input type up to 16 points can be output through the ON/OFF combination of 4-point input signals.

2. What is the resolution of the NITV2010 series DFL proportional valves?

The resolution is "sensitivity below 0.2%F.S." in the sample specification column. NITV2010's full range is 100kPa, while 0.2kPa corresponds to 0.2kPa under 0.2%.

3. What is the threaded hole in the M5 on the upper left side of the nitv20/30 series proportional valve?

This hole is the air vent of the solenoid valve, please open the air for use.

If the plug and pressure gauge are installed, the product cannot work normally.(NITV10** is upper left M3 threaded hole)

4. It is recorded in the iwaki notes of NITV series DFL proportional valves that cutting off the power under control will maintain the output side pressure for a certain period of time. Why?

In the control state, turn off the power supply, then the supply and exhaust valves are closed.

Therefore, the pressure in the pilot chamber remains unchanged, and the output pressure on the secondary side will remain near the set pressure.However, this state can only be maintained for a period of time, not for a long time.

5. What is the error of nitv2030-222bs DFL proportional valve Er.1 and what is the countermeasure?

When the input specification of this product is DC0 ~ 5V, when the input signal exceeds 5V, that is, if the input signal is too large, Er.1 will alarm.Countermeasures: confirm whether the input signal is within the rated range, adjust the input signal, and restart the power supply to eliminate Er.1 alarm.

6. NITV1000 ~ 3000 series DFL proportional valve power cord in addition to the standard 3m length, any other length?

The power cables are 1, 3, 5, 6, 7, 8 and 10m long.For example, when choosing 10m, the straight head model is p398020-500-10, the elbow model is p398020-501-10, and the straight head connector of 3m is p398020-500-3.(note: DeviceNet specifications are different for power cables

NITV series DFL proportional valve keeps beeping "beep -", why?The power has been ON, the compressed air and input signal have not been given.

ITV has built-in solenoid valves for supply and exhaust. Through pulse control, when the set pressure is different from the actual pressure, the solenoid valve will continue to work on-off until the set pressure is reached.The beeping of the middle finger is the sound of the solenoid valve.When cutting OFF the air source, please turn OFF the power supply, otherwise the on-off continuous action of the solenoid valve will reduce its service life.(when the air source pressure is cut off, even if the input signal is 0%, the zero point of NITV deviates from the ambient atmospheric pressure, and the supply/exhaust valve will continue to work to reach the atmospheric pressure value.)