| 摘要 |
A pressure test gauge, particularly for testing the air pressure at the outlet of a spraygun, comprises a body 1 having an inlet 2 which may take the form of a replaceable screw-in unit 3 sealed airtight with the body. Unit 3 connects with passages 4, 5 passing through the body. Passage (5) is a small bore tube which connects inlet 2 with pressure gauge 6. Between the inlet and the gauge is a valve 8 comprising a barrel 9 screwed into the body and having a motoring passage 11. The gauge body may have ribs 12 for gripping the body and a bracket 13 with screws 14 to secure it to a wall. Passages 4, 11 allow spray gun air to flow while the gauge measures pressure via passage 5. The inlet may be blanked off (Figs. 4 and 5, not shown) and air supplied via the valve opening to measure static pressure. <IMAGE> |
