2 port motorised valve
The DDF-G series on-off electric valve is composed of a DFQ-JA series valve driver and a DDF-G series copper valve. It is specially used to control the opening and closing of the cold water or hot water air conditioning system pipeline to adjust the indoor temperature. The driver is driven by a one-way hysteresis synchronous motor and cooperates with the valve spring reset mechanism. The valve is normally closed when not working. When it needs to be enabled, the thermostat will send an opening signal to connect the driver to the AC power supply and drive the valve to open, thereby allowing cold water or hot water to flow into the fan coil to provide cooling or heating for the room. When the indoor temperature reaches the thermostat setting value, the thermostat will cut off the power supply, and the reset spring will close the valve to prevent water from entering the fan coil. Through the on-off control of this valve, the system can effectively keep the indoor temperature within a predetermined range.
●Valve body material: forged brass
●Valve stem material: stainless steel 06Cr19Ni10
●Seal material: nitrile rubber (NBR)
●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
Technical Parameters
| Ordering model | Product model | Valve type | Diameter | Thread size | Kv value | Maximum closing pressure difference kPa |
Dimensions | ||
| L | W | H | |||||||
| 12060 | DDF-G-215*DFQ-JA1-220 | 2 port | 15 | G1/2 | 1.5 | 250 | 52 | 14 | 44.5 |
| 12061 | DDF-G-220*DFQ-JA1-220 | 2 port | 20 | G3/4 | 2.1 | 250 | 64 | 17.5 | 44.5 |
| 12662 | DDF-G-220A*DFQ-JA1-220 | 2 port | 20 | G3/4 | 2.3 | 250 | 55 | 17.5 | 44.5 |
| 12663 | DDF-G-220B*DFQ-JA1-220 | 2 port | 20 | G3/4 | 2.3 | 250 | 51 | 17.5 | 44.5 |
| 12063 | DDF-G-225*DFQ-JA1-220 | 2 port | 25 | G1 | 3.3 | 100 | 71 | 20 | 44.5 |
| 12064 | DDF-G-315*DFQ-JA1-220 | 3 port | 15 | G1/2 | 1 | 250 | 55 | 30 | 40 |
| 2065 | DDF-G-320'DFQ-JA1-220 | 3 port | 20 | G3/4 | 2.3 | 250 | 64 | 35 | 45 |
| 12066 | DDF-G-325*DFQ-JA1-220 | 3 port | 25 | G1 | 3.6 | 100 | 66 | 35 | 45 |
| Note: The above table is the commonly used recommended models, please consult for details. | |||||||||
Product Advantages
Automated Control: Remote control and automated management are achieved through electric actuators, improving the flexibility and efficiency of the system.
High Reliability: High-quality materials and precision design ensure the long-term stability and durability of the valve.
Low Noise Design: Modern electric valves generally have low noise operation characteristics, improving user experience.
FAQ
Q1.Why are 2 port motorised valve used in HVAC?
2 Way Control Valves are an important part of any building's HVAC system. They allow you to control the temperature of a room by adjusting the amount of hot or cold air entering it. This helps keep your building comfortable year-round without wasting energy by heating or cooling empty rooms.
Q2.What is the difference between a 2 port and 3 port motorised valve?
The 2 port MTV normally closed models have end switches for electrical control of pump and/or boiler. The 3 port midposition valve has been designed to control the flow of water in domestic central heating systems, where both radiator and hot water cylinder circuits are pumped.
Q3.What are the advantages of a double port valve?
2 port zone valve can also be used as a backpressure regulator and an anti-siphon valve; 3-port cannot. Choice of in-line or angle pattern increases versatility in piping design. Flow capacity is better; 2-port valves provide less restriction and less deadleg.
Q4.How does the switching speed of a 2 port motorised valveaffect the system?
The switching speed of a 2-port electric valve is a key parameter that directly affects the response speed and control effect of the system. A switching speed that is too fast may cause a water hammer effect, causing pressure shock in the pipeline system; while a switching speed that is too slow may delay the response time of the system and affect the overall control accuracy of the system. Therefore, choosing the right switching speed is crucial to ensure smooth operation of the system.
Q5.What are the power requirements for a 2-port electric valve?
The electric actuator of a 2 zone valve usually requires a specific power supply, the most common of which is 24V AC/DC or 230V AC voltage. Different valve models have different power requirements, and you should ensure that the power supply matches the actuator when selecting. Too high or too low voltage may cause the electric valve to operate unstably or be damaged. Ensuring the correct power connection is key to the safe operation of the equipment.
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