A.R. Hydraulic Fittings Pvt. Ltd. Offers Vent Hex Needle Industrial Valves. A.R. Hydraulic Fittings Pvt. Ltd. Is an ISO 9001:2000 registered company. A.R. Hydraulic Fittings Pvt. Ltd. Supplies precision engineered components and equipment such as pipe fittings, hose fittings, steel pipe fittings, stainless steel pipe fittings, industrial pipe fittings, etc. Which is used widely in mechanical and engineering industries. Vent Hex Needle Industrial Valves are generally used in flow metering applications. Vent Hex Needle Industrial Valves can be used when a continuous, calibrated, low flow rate is required for some time like the idle fuel flow in a carburetor. It is made in tune with international quality guidelines and these valves are dimensionally accurate and can be easily installed.