Polished stainless steel test cylinders for vapor pressure tests of liquid petroleum products, volatile crude oil, and liquefied petroleum gas (LPG). Each cylinder consists of upper chamber and lower chamber in required 4:1 volume ratio. O-ring gaskets provide tight seal between chambers and at gauge coupling. One-opening type cylinder is for gasoline and other products having a Reid Vapor Pressure below 180kPa (26psi). Two-opening type cylinder is for liquid products having a Reid Vapor Pressure above 180kPa (26psi) as described in ASTM D323 and for liquefied petroleum gas products as described in ASTM D1267. Gauge is ruggedly constructed Bourdon type designed for the Reid Vapor Pressure Test. Heavy duty rotary brushed stainless steel movement. Lightweight aluminum case with corrosion-resistant finish and heavy duty brass, non-sparking handle. Includes blow-out disc and 64mm (1/4") NPT male thread connection. Gauge range: 01750kPa (0250psi). Gauge figure intervals: 100kPa (25psi). Gauge interval graduations: 20kPa (1.0psi). Ordering Information: Bleeder valve assembly is designed for use with two-opening type cylinder 52941-464 during liquefied petroleum gas testing.