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Shaw wing-nut mechanical expansion plugs minimise pressure from the fluid to permit change or expansion of a state from fluid to vapour. They are also used as low-pressure seals in circular openings.
A| Style | Model | Nominal Size | Min. Dia. | Max. Diameter | Max. Back Pressure | Material | Type | Price | |
|---|---|---|---|---|---|---|---|---|---|
| A | 72003 | 1 1/2" | 1.44" | 1.613" | 5 ft. of Head | Neoprene Rubber, Zinc Plated Steel | Wing-Nut | £51.95 | |
| A | 72005 | 2" | 1.93" | 2.162" | 5 ft. of Head | Neoprene Rubber, Zinc Plated Steel | Wing-Nut | £56.62 |
They can handle a maximum air pressure of 10 psi.
They have holes with diameters ranging from 1.44 inches to 2.14 inches.
It is located at the liquid line between the inlet and the condenser.