The electric two-way regulating valve series can regulate the flow of steam or hot and cold water. Proportional integral electric two-way valves are widely used for fluid control in central air conditioning, heating, water treatment, industrial processing industries and other systems.

Product features of electric two-way regulating valve

The electric actuator uses a cast aluminum bracket and plastic casing, which is small in size and light in weight

Select permanent magnet synchronous motor with hysteresis clutch mechanism, reliable self-protection function suitable for various control signals: incremental (floating point), voltage (0-10V), current (4-20mA)

Equipped with 0-10V or 4-20mA feedback signal (optional)

The transmission gear adopts metal gears, greatly improving the service life of the driver

Low power consumption, high output force, and low noise. The valve body is available in various materials such as cast copper, cast iron, cast steel, and stainless steel to meet the requirements of different working media and temperatures

The valve body has two types of connections: threaded connection and flange connection, which are easy to install and constructed in accordance with IEC international standards

The valve body structure includes two-way valve (single seat), two-way balance valve (balance type), three-way merging and three-way diversion valve, electric two-way regulating valve, and product functions

The electric two-way valve series is suitable for temperature control of fresh air units in air conditioning systems during winter/summer.

The air supply temperature control system consists of a temperature sensor TE-1, a proportional integral temperature controller TC-1, and an electric two-way regulating valve TV-1. The TE-1 installed in the air supply duct transmits the detected temperature signal to the TC-1, which continuously compares the detected value of the TE-1 with the set value and outputs a signal to control the continuous adjustment of the TV-1 opening. Finally, keep the ambient temperature measured by TE-1 within the set temperature range.

When the temperature behind the coil is below a certain limit, the low-temperature protection switch TS-1 cuts off the power supply of the power supply motor, thereby closing the fresh air valve to prevent the water inside the coil from freezing and cracking.

Electric two-way valves are divided into two types: direct acting and pilot operated. Their application scope and characteristics are as follows:

1. The driver is driven by a single hysteresis synchronous motor, and the valve spring is reset. When the valve is not working, it is in a normally closed state. When it needs to work, the temperature controller provides an opening signal to connect the electric valve to the AC power supply and activate it.

2. Used to control the opening or closing of pipelines in cold or hot water air conditioning systems, achieving the goal of controlling room temperature.

3. Open the valve to allow chilled or hot water to enter the fan coil unit, providing air conditioning or heating for the room. When the room temperature reaches the set value of the thermostat, the thermostat will cut off the power to the electric valve, and the reset spring will close the valve, thereby cutting off the water flow into the fan coil unit. By closing and opening the valve, the room temperature will always be maintained within the temperature range set by the thermostat.

The driver of the electric valve is connected to the valve using a threaded connection, and the driver can be installed after the valve is installed. On site assembly, flexible and convenient wiring. The planar design of the driver can be installed close to the wall, occupying a small space, the product is reliable and durable, the working noise is low, and it can work reliably in the high temperature and high humidity environment commonly found in concealed fan coil units.

Valve driver, driver product usage:

Overview of VA-3000 and VA-7000 Series Valve Drivers

The VA-3000 and VA-7000 series valve actuators are linear actuators

Widely used in heating, ventilation, and air conditioning series.

VB-3000 and VB-3000 series DN25-DN50 regulating valves with two-way or three-way connections, used together.

VA-7000 is used in conjunction with VB-7000 series DNB5-DN200 regulating valves with two-way or three-way connections.

VA-3000 and VA-7000 both have two basic models;

The VA-7100 (VA-3100) provides incremental control with reversible electric operation.

VA-7012 (VA-3102) can accept inputs of 0-10V or 4-20mA DC control signals, provide proportional control, and can have output feedback of 0-10V or 4-20mA.

VA-3000 is suitable for travel distances of 12m, 19m, and 22m.

VA-7000 is suitable for strokes of 24m, 38m, and 44m, and the stroke used for the dual proportional control type is selected by a jumper.

Technical indicators:

Drive motor: Hysteresis synchronous motor

Driver operating voltage: 200VAC, 50Hz/60Hz (available in AC24V and 110V options)

Power consumption: ≤ 5.7VA

Valve body pressure: 1.6MPa

Allowable pressure difference: ≤ 0.12MPa

Applicable media: cold water, hot water

Applicable medium temperature: 2 ℃ -95 ℃

Applicable ambient temperature: 0 ℃ -60 ℃

Opening and closing time: about 10 seconds on, about 5 seconds off

Installation and debugging:

Before installation, it is necessary to carefully read the instructions, cut off the relevant power supply, and have professional technicians perform the installation.

The direction of water flow must be the same as the arrow direction on the valve body.

The valve body must be located above the water receiving tray of the coil to ensure that it falls into the water receiving tray in case of dripping.

The valve body and driver must be installed in a vertical direction? Within the temperature range of 60 ℃, there should be at least 30mm of space above it for disassembly and assembly. Adequate maintenance operation space must be maintained with surrounding pipelines, equipment, and buildings, and must be installed in a location accessible to maintenance personnel through manholes.

The driver can only be installed after the valve body is installed and pressure tested with the pipeline.

If the driver has already been installed on the valve body, no force should be applied to the driver during installation and debugging, otherwise it will damage the driver.

After installation and checking for correctness, power on for debugging. At least three complete operating cycles of the drive should be observed to ensure that all components are correct.

After passing the waterless debugging, conduct a water test. The pressure difference between the water supply and drainage of the system must be strictly controlled within 0.15 MPa to ensure the effectiveness of the electric control valve on the water flow switch

Scope of application:

Automatic control in the production processes of civil systems such as air conditioning, heating, ventilation, and domestic hot water in various industries such as chemical, petroleum metallurgy, and power light industry.