22mm 2 Port Valve

DDF-K-H series card sleeve electric valves are specially designed for controlling the end of heating and cooling pipes in central air-conditioning systems to achieve indoor temperature regulation. The valve is driven by a one-way hysteresis synchronous motor and has a spring return function. The valve remains normally closed when not in operation. When operation is required, the thermostat sends a valve opening signal, the driver is connected to the power and started, the valve opens, and cold or hot water enters the fan coil to provide indoor air conditioning or heating. When the room temperature reaches the setting value of the thermostat, the thermostat instructs the electric valve to cut off power, and the valve is closed by spring reset, stopping the water flow from entering the fan coil unit. By adjusting the opening and closing of the valve, ensure that the room temperature is stable within the set range.

Product parameters

●Valve body material: forged brass
●Valve stem material: stainless steel
●Seal material: EPDM
●Working medium: cold/hot water
●Fluid temperature: 5~95℃
●Pressure: 1.6MPa
●Ambient temperature: 0~65℃ Maximum relative humidity is non-condensing
●Travel time: 11~15 seconds
●Motor torque: >800gf.cm

Ordering model	Product model	Valve type	Diameter	Connection method	Kv value	Maximum closing pressure difference kPa	Dimensions
							L	W	H
12613	DDF-K-H215.88*DFQ-HA1-220	2 port	15.88	welding	3	80	79	21	25
12614	DDF-K-H222.2DFQ-HA1-220	2 port	22.2	welding	3	80	89	21	25
12615	DDF-K-H228.6*DFQ-HA1-220	2 port	28.6	welding	3	60	92	21	25
Note: The above table is the commonly used recommended models, please consult for details.

 

 

Maintenance and Installation

 

The valve is compact, easy to install and maintain, and can usually be connected directly to the standard piping system. Regular inspection of the tightness and actuator performance will help ensure the long-term efficient operation of the system.

Q1.What is the main purpose of zone valves?
Zone valves are mainly used to control the flow of liquid or gas in HVAC systems. They are usually used in radiators, floor heating systems or fan coils to control the switch of fluids and thus adjust the indoor temperature.

Q2.What is the working principle?
The valve is usually in the closed state. When the valve opening signal is received, the electric actuator drives the valve to open and allow the fluid to pass. After the closing signal is powered off, the valve is closed by spring reset to stop the flow of fluid.

Q3.How does a 22mm 2 port valve control the indoor temperature?
By controlling the flow of fluid into or out of heating or cooling equipment (such as radiators or fan coils), 2-port valves regulate the supply of heat or cold air and thus control the indoor temperature.

Q4.What systems are 22mm 2 port valve suitable for?
The 22mm diameter is suitable for medium flow systems and is often used for medium-sized zone control in home heating, floor heating, central air conditioning systems and commercial buildings.

Q5.What is the difference between a 2-port valve and a 3-port valve?
A 2-port valve has only one inlet and outlet, and is used to switch and control the fluid in a single path; a 3-port valve has three ports and can be used to divert or mix fluids, which is suitable for more complex flow distribution scenarios.

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