Computer Controlled Three Dimensions (31) Physics

Existent Gum Test Apparatus

Koehler Instrument Company, Inc. (USA) is pleased to announce our newly designed Existent Gum Test Apparatus for existent gum in fuels by jet evaporation. This instrument evaporates aircraft turbine fuel and motor and aviation gasoline samples under controlled conditions in accordance with ASTM specifications. It consists of a high temperature evaporation bath with 100ml test beakers and, for aircraft turbine fuels, a steam generator and steam superheater.

Existent Gum Test Apparatus

Evaporation baths conform to ASTM D381 and related specifications. They come with a choice of three-unit or six-unit models. Its Safety-top assembly allows for easy positioning and connection of all conical adapters to the bath. The digital flowmeter allows for accurate and precise air flow measurement. It includes a built-in steam superheater and microprocessor programmable for high accuracy temperature control, in addition to a built-in pressure regulator.

Features include the following: Electrically heated bath for determining existent gum in aircraft turbine fuels by stream-jet evaporation and in motor and aviation gasoline by air-jet evaporation. The instrument is fully insulated, and made with an aluminum block design which promises safe, efficient high temperature operation. The existent gum test apparatus is equipped with an air/steam pressure regulator with gauge and a digital flowmeter for adjusting air flow per ASTM specifications. Stainless steel jets deliver air or steam flow to the test wells via detachable brass conical adapters. Microprocessor IPD control offers expedient temperature stabilization without overshoot, and the bath is protected by an overtemperature control circuit which interrupts power in the event that bath temperature exceeds a programmed cut-off point. Dual LED displays provide actual and setpoint temperature values in °C/°F format. Communications software (RS232, etc.), ramp-to-set and other enhanced features are available as supplemental cost options. Contact your Koehler representatives for further information.

The test method determines gum formed during fuel storage which can deposit on induction system surfaces, intake valves, stems and guides. To test for gum content, a 50ml sample is evaporated in an aluminum block bath for a specified period under controlled conditions of temperature and flow of air (aviation and motor gasoline) or steam (aircraft turbine fuel).
The dimensions are as follows: W x D x H, in. (cm) K33900 21”x20.5×28 (53.34×52.07×71.12) Net weight is 230 lbs (104.3kg). K33780/K33781 measures 32.5x11x19 (83x28x48) with a net weight of 85 lbs (38.6kg). Shipping Weight Dimension for K33900 is 313 lbs (142kg) / 17.2 Cu. Ft. K33780/K33781 is 140 lbs (63.5kg) / 8.3 Cu. Ft.

Specifications include the following: Conforms to the specifications of ASTM D381; IP 131; IP 540; ISO 6246; DIN 51784; FTM 791-3302; NF M 07-004. Testing Capacity for K33900 is 6 sample beakers and for K33780/K33781 is 3 sample beakers. Maximum temperature is 475°F (246°C). Temperature Control Stability is +- 1°F (+-0.5°C). Bath configuration is machined aluminum block with multiple cartridge heaters. Heater Range for K33900 is 0-3000W and for K33780 and K33781: 0-1500W. Superheater (Model K33900 only) has a superheating chamber and condensate trap constructed of stainless steel. Solid state thermoregulator (0-550°F) and Heater Range of 0-3000W. Electrical requirements for K33900 are 220-240V 50/60Hz, Single Phase, 30a. K33780 is 115V 60Hz, Single Phase, 13.0A and K33781 is 220-240V 50/60Hz, Single Phase, 6.8A.

Accessories include the following: Conical Brass Adapters for air/steam jets. Model K33900 comes with built-in Superheater-Six-unit bath with a built-in thermostatically controlled superheater which delivers dried steam to the bath inlet for steam-jet method testing of aircraft turbine fuels. Has digital indicating solid state bath temperature control with digital setpoint and display. Model K33780/K33781 comes with a three-unit bath without built-in superheater. All controls are housed in the bath cabinet.

Ordering information is as follows: K33900 Existent Gum Evaporation Bath , 6-Unit with Superheater, 220-240V 50/60Hz; K33780 Existent Gum Evaporation Bath, 3-Unit, 115V 60Hz; and K33781 Existent Gum Evaporation Bath, 3-Unit, 220-240V 50/60Hz