Manifold Gauges for Air Conditioning Manufacturer,Supplier and Exporter in India
Product Code : EL-RACLE-12742
Jlab Export is a leading Manifold Gauges for Air Conditioning Manufacturer,and suppliers in India
Split and window air conditioners on R-410A or R-32 have 5/16 in service ports. The red and blue hoses of this set end in 5/16 in fittings to suit them. The 80 mm gauges are scaled for R-22, R-410A and R-32, so one set covers older and newer units. A sight glass is built into the manifold, and all three hoses are 120 cm long.
Specifications
| Gauge diameter | 80 mm |
| Refrigerant scales | R-22, R-410A, R-32 |
| Sight glass | Included |
| Red and blue hoses | 1/4 in to 5/16 in |
| Yellow hose | 1/4 in to 1/4 in |
| Hose length | 120 cm |
| Packing | Blow-moulded case |
| Minimum order quantity | 1 unit |
| Dispatch time | Usually 7–10 working days |
| Manufacturer | JLab (Jain Laboratory Instruments Pvt Ltd), Ambala, India |
Lab Exercises on Split Air Conditioners
On the R-32 Split Air-Conditioner, students connect the blue hose to the service port on the outdoor unit and run the system in cooling. They read the suction pressure, take the saturation temperature from the R-32 scale and compare it with the suction pipe temperature to work out superheat.
For a new installation, the pipes and indoor unit are first pressure-tested with the Nitrogen Pressure Test Kit. They are then evacuated through the manifold with one of the Fast Vacuum Pumps. To top up an R-410A unit, students charge R-410A Refrigerant as liquid, because it is a blend.
Frequently Asked Questions
Why do the red and blue hoses have a 5/16 in end?
The 1/4 in end fits the manifold and the 5/16 in end fits the service ports used on R-410A and R-32 equipment. The larger port size keeps tools for older refrigerants off these systems. The yellow hose is 1/4 in at both ends for the pump or cylinder.
Can the set be used on an R-22 unit?
Yes, the gauges carry an R-22 scale. Older R-22 units usually have 1/4 in service ports, so the 5/16 in hose ends need an adapter to fit them. Purge the hoses when moving from one refrigerant to another.
How do I read three refrigerants on one gauge?
Each refrigerant has its own temperature ring around the pressure scale. Read the needle against the ring for the refrigerant named on the unit rating plate. R-32 and R-410A have similar but not identical pressure curves, so using the wrong ring gives a temperature that is slightly off.
What should the gauges read with the unit switched off?
After the unit has been off for some time, the pressure on both sides evens out. It then sits close to the saturation pressure of the refrigerant at the outdoor temperature. Compare the reading with that temperature on the R-32 or R-410A ring. It shows that refrigerant is present, but not how much.
Should split units be charged by weight?
Yes, wherever possible. The rating plate gives the charge for the standard pipe length. Weigh in the refrigerant, then use the gauge readings to check that the system runs as expected. R-32 is mildly flammable, so keep flames and sparks away.
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Last updated: 5 November 2026