Koehler Instrument Company
Summary of Test Method
Vapor pressure is a critical factor in the handling and performance of liquid petroleum and liquefied petroleum gas (LPG) products. The vapor pressure of automotive gasolines is subject to governmental regulation for pollution control purposes.
Reid Vapor Pressure Cylinders
• Conform to ASTM D323, D1267 and related specifications
• One-opening and two-opening types
Polished stainless steel test cylinders for vapor pressure tests of liquid
petroleum products, volatile crude oil and liquefied petroleum gas (LPG).
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 is for gasoline and other products having a Reid Vapor
Pressure below 26psi (180kPa). Two-opening type is for liquid products
having a Reid Vapor Pressure above 26psi (ASTM D323) and for LPG (ASTM D1267). Lower chamber of two-opening apparatus includes straight-through ball valve and 1⁄4" needle valve. For LPG testing, order two-opening type apparatus and accessory bleeder valve assembly.
Reid Vapor Pressure Gauges
• Conforming to ASTM D323, D1267 and related specifications
• Dual psi/kPa scale on a 41⁄2" diameter dial
• Accurate to within 0.5% of scale range
• Micrometer adjustable pointer
Ruggedly constructed Bourdon type gauge designed especially for the Reid Vapor Pressure test. Heavy duty rotary brushed stainless steel movement. Lightweight aluminum case with corrosion-resistant finish and heavy duty brass nonsparking handle. Includes blow-out disc and 1⁄4" NPT male thread connection.
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FTM-791-1201, IP-69, DIN-51754, DIN-51616, ISO-4256, ISO-3007, IP-161.