Manifold Gauges For Refrigeration Systems Manufacturer,Supplier and Exporter in India
Product Code : EL-RACLE-12745
Jlab Export is a leading Manifold Gauges For Refrigeration Systems Manufacturer,and suppliers in India
For general refrigeration work, this manifold set reads four common refrigerants on its 80 mm gauges: R-22, R-134a, R-404A and R-407C. Between them they cover domestic and commercial refrigerators, display cabinets, cold rooms and many older air conditioners. A sight glass is built into the manifold, and the red, blue and yellow hoses are 120 cm long with 1/4 in ends.
Specifications
| Gauge diameter | 80 mm |
| Refrigerant scales | R-22, R-134a, R-404A, R-407C |
| Sight glass | Included |
| Hoses | Red, blue and yellow, 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 a Refrigeration Rig
On a working system such as the Refrigeration Test Rig, students connect the blue hose to the suction service valve. The red hose goes to the discharge or liquid valve. They log both pressures and read the evaporating and condensing temperatures from the scale for its refrigerant. These go beside the rig temperature readings when the class works out COP.
A full service sequence follows. The circuit is pressure-tested with the Nitrogen Pressure Test Kit and evacuated with one of the Small Vacuum Pumps. With the system off, R-404A Refrigerant is charged as liquid into the high side.
Frequently Asked Questions
Which systems is this set meant for?
Use it where the refrigerant is R-22, R-134a, R-404A or R-407C, as in refrigerators, freezers, cold rooms, display cabinets and older air conditioners. R-410A and R-32 split units need the Manifold Gauges for Air Conditioning, which has their scales and 5/16 in hose ends.
Why are R-404A and R-407C charged as liquid?
Both are blends of refrigerants that boil at different temperatures. Taking vapour from the cylinder draws off more of the lighter parts and changes the mix left behind. Charging liquid keeps the proportions right, metered slowly if it goes into the low side.
How do I measure subcooling?
Read the high-side pressure and take the condensing temperature from the scale for the refrigerant in the system. Measure the liquid line temperature after the condenser and subtract it from the condensing temperature. The difference is the subcooling.
What do the hose colours mean?
By common practice, blue goes to the low side, red to the high side, and yellow is the service hose to the vacuum pump, cylinder or recovery unit. Matching each hose to the gauge above it helps avoid opening the wrong valve.
How do I check the gauges before use?
With the hoses open to air and no pressure in them, both needles should rest on zero. If a needle sits off zero, reset it with the zero adjuster on the gauge, or note the error and allow for it in every reading.
Spares and Accessories for Manifold Sets
- Manifold Replacement Parts Kit
- Refrigerant Hose (150 cm, with ball valves)
- Liquid Charging Adapters 1/4
- Hose Adapters
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Last updated: 5 November 2026