Shut Off Valves TST For Refrigeration 1/2 Manufacturer,Supplier and Exporter in India
Product Code : EL-RACLE-12837
Jlab Export is a leading Shut Off Valves TST For Refrigeration 1/2 Manufacturer,and suppliers in India
With a 1/2 in flare connection, this refrigeration shut-off valve closes off a line so that service work can be done on one part of a system. It is built for high-pressure duty. The design, the welding and the sealing material suit circuits that run on R410A.
Specifications
| Type | Shut-off valve for refrigeration |
| Connection | 1/2 in flare |
| Built for | High working pressure, for example R410A systems |
| Minimum order quantity | 10 units |
| Dispatch time | Usually 4–6 working days |
| Manufacturer | JLab (Jain Laboratory Instruments Pvt Ltd), Ambala, India |
Practicals on Valve Fitting and Isolation
Students flare the ends of two short lengths of 1/2 in copper with the Hydraulic Flaring And Swaging Tool Kit. They fit the valve between them as part of a small practice loop. Each flare is checked for cracks and a smooth face before the nuts are tightened.
With the valve closed, one side of the loop is charged with dry nitrogen and the other is left at atmospheric pressure. A set of Manifold Gauges for Air Conditioning, whose scale covers R-410A, shows whether the seat holds. Opening the valve then lets the two gauge readings equalise.
Frequently Asked Questions
When is a 1/2 in shut-off valve used?
On 1/2 in copper lines, such as the liquid or suction lines of larger split and commercial systems. The valve, flare nut and tube must all be the same size for the flare joint to seal.
Can the valve be left part open?
Use it fully open in normal running and fully closed for isolation. A part-open valve throttles the line, causing a pressure drop and extra wear on the seat.
Do the flare nuts need checking after the system has run?
Yes. Flare joints can loosen as the line heats and cools, and vibration adds to it. Leak check both joints once the system has run for a while, and again at the next service. A joint that keeps leaking usually has a poor flare that needs remaking.
How do I check that the valve seat is holding?
Pressurise one side with nitrogen, close the valve and fit a gauge on the other side. If that gauge rises over a few minutes, the seat is passing and the valve needs attention.
Other Shut-Off Valves and Line Fittings
- Shut Off Valves TST For Refrigeration 3/8
- Shut Off Valves TST For Refrigeration 5/8
- Flare To Solder Fitting
- Mufflers (1/2 in flare, brass)
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Last updated: 5 November 2026