Four Way Valve Manufacturer,Supplier and Exporter in India
Product Code : EL-RACLE-12846
Jlab Export is a leading Four Way Valve Manufacturer,and suppliers in India
A four-way reversing valve lets one refrigeration circuit both cool and heat. It switches the compressor discharge between the indoor and outdoor coils, so the coil that was the evaporator becomes the condenser. This valve is for 18,000 BTU heat pump systems such as central, unit and room air conditioners, and has a copper body.
Specifications
| Capacity | For 18,000 BTU systems |
| Valve type | Four-way reversing valve for heat pumps |
| Body | Copper |
| Coil | Electromagnetic, in thermosetting plastic, water resistant |
| In service | Works at low pressure difference, with low temperature rise and low noise |
| Flow | Low pressure drop and low internal leakage |
| Minimum order quantity | 10 units |
| Dispatch time | Usually 4–6 working days |
| Manufacturer | JLab (Jain Laboratory Instruments Pvt Ltd), Ambala, India |
Classroom Demonstrations of Heat Pump Reversal
Teachers start with the sectioned 4-way reversing valve in the Eight Piece Sectioned Valve Set For Demonstration. Students see the main slide and follow the ports: discharge in, suction out, and one port to each coil. Drawing the two slide positions shows how the coils swap roles.
The Basic Refrigeration Training Unit has valves to change from cooling to heating, so students can run it in each mode. They log pressures with Manifold Gauges for Air Conditioning and pipe temperatures with an Infrared Thermometer with Laser. After each changeover they note which coil runs hot and which runs cold.
Frequently Asked Questions
Is the coil energised in cooling or in heating?
That depends on the system maker. Many units energise the reversing valve in cooling mode, and others energise it in heating. Check the wiring diagram of the unit before wiring a replacement, or the system will run in the wrong mode.
How does the valve change over?
A small pilot valve under the coil sends high and low pressure to the two ends of the main slide. The pressure difference pushes the slide across and links the discharge to the other coil. This is why it changes over only while the compressor is running.
What size of system is this valve for?
It is for 18,000 BTU systems, which is 1.5 tons of refrigeration. A reversing valve that is too small for the system causes a high pressure drop. One that is too large may not shift fully when the pressure difference is low.
How can I tell if a reversing valve is stuck?
First check that the coil gets its voltage and pulls in. If it does but the unit stays in one mode, the slide may be stuck. A slide stuck halfway lets hot gas leak into the suction, so suction pressure rises, the suction pipe runs warm and capacity falls.
Is a whoosh of gas at changeover normal?
Yes. When the slide moves, the high and low side pressures suddenly meet through the valve and the refrigerant rushes to equalise. A short whoosh or hiss at each changeover, including the start and end of defrost, is normal. A constant hiss afterwards, with poor heating or cooling, points to a slide stuck part way.
Other Heat Pump Units and Parts
- Multi-Head Mini Split Heat Pump Training Unit
- Split Air-Conditioner (18000 BTU, with four-way valve)
- Mechanical Heat Pump Test Rig
- Suction Line Accumulators
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Last updated: 5 November 2026