W.L. WALKER 18028CSU EXPLOSION PROOF HEATED ASTM OIL SWINGING BUCKET CENTRIFUGE 115 VOLT EXPLOSION PROOF 4-PLACE VARIABLE SPEED HEATED CENTRIFUGE FOR 100 ML SHORT CONE ASTM OIL TUBES. EACH MACHINE HAS FOUR PREHEATER POCKETS

W.L. WALKER 18028CSU EXPLOSION PROOF HEATED ASTM OIL SWINGING BUCKET CENTRIFUGE 115 VOLT EXPLOSION PROOF 4-PLACE VARIABLE SPEED HEATED CENTRIFUGE FOR 100 ML SHORT CONE ASTM OIL TUBES. EACH MACHINE HAS FOUR PREHEATER POCKETS 18' WIDE AND 10' HIGH; LIDS OPEN 23-1/2' WIDE 15-1/2' HIGH. NOT INCLUDING EXPLOSION PROOF FITTINGS THIS IS A FULLY AUTOMATIC BENCHTOP CENTRIFUGE DESIGNED FOR PETROLEUM TESTING. DETERMINING SEDIMENT AND WATER CONTENT IN CRUDE OIL FUEL OILS MIDDLE DISTILLATE FUELS (STANDARD TEST METHOD FOR WATER AND SEDIMENT IN CRUDE OIL BY CENTRIFUGE METHOD. API 10.4 / ASTM D96 10.4 DETERMINATION OF WATER AND/OR SEDIMENT IN CRUDE OIL BY THE CENTRIFUGE METHOD (FIELD PROCEDURE). API MPMS CH. 10.6 / ASTM D1796 STANDARD TEST METHOD FOR WATER AND SEDIMENT IN FUEL OILS BY THE CENTRIFUGE METHOD. THIS CENTRIFUGE USES 100 ML SHORT TUBES. SHORT TUBES CAN BE USED FOR ASTM D4007 WHICH IS A LABORATORY PROCEDURE FOR DETERMINING THE AMOUNT OF WATER AND SEDIMENT IN CRUDE OILS OR FUELS. AS WELL AS ALL THE ABOVE METHODS. SERIAL NO: 609293-R TEMP CODE T3C CLI GP D LR 88082-1 SA C US POWER SWITCH: COOPER CROUSE-HINDS CONTROL ASSEMBLY COVER FOR HAZARDOUS LOCATIONS AMPS: 20 702G LISTED CL. I GR. C.DCLII GR. E,F,G CL.III HEATER POWER SWITCH: CROUSE-HINDS CONTROL ASSEMBLY COVER FOR HAZARDOUS LOCATIONS CAT NO: DS415 CL I GR C,D CL II GR E,F,G CL. III M64 CHROMALOX PRECISION HEAT AND CONTROL: PART NO: 500515534 CAT NO: ARTM-750E2T5 280JM VOLTS: 120 CLASS I DIV 1 GROUPS B,C & D CLASS II DIV 1 GROUPS E,F(T3) & (GT3B) CLASS III NEMA 3,4 CLASS I ZONE I EX D IIB LINK MILTON ROY LINC MODEL L 471-01-04 EXPLOSION PROOF INDOOR/OUTDOOR CLASS I DIV. 1 GROUPS C,D CLASS II DIV. 1 GROUPS E,F,G CLASS III DIV I 0105471 REV.3 CL.I GR. CD CL.II GR. EFG. IT DOES APPEAR TO BE JUST AN ON/OFF SYSTEM. WHILE THE FACTORY DOCUMENTATION CLASSIFIES THE MOTOR SYSTEM AS VARIABLE SPEED TO MEET EXACT ASTM/API RCF REQUIREMENTS THE SPEED VARIATION IS NOT CONTROLLED BY A USER-FACING DIAL INSTEAD THE SPEED REGULATION IS HANDLED THROUGH TWO SPECIFIC INTERNAL MECHANISMS: INTERNAL DC CONTROLLER / RHEOSTAT: THE SPEED VARIATION IS ADJUSTED VIA AN INTERNAL MOTOR CONTROLLER BOARD OR RHEOSTAT TYPICALLY PRESET AT THE FACTORY TO STANDARD TESTING SPEEDS (E.G. 1600-1700 RPM). SOFT-START SWITCHING: THE UNIT UTILIZES AN INTERNAL SOFT-START SWITCH THAT AUTOMATICALLY CONTROLS THE RAMP-UP VARIATION SO THE MOTOR DOES NOT SHOCK THE SAMPLES UPON FLIPPING THE ON SWITCH. BECAUSE IT LACKS AN EXTERNAL POTENTIOMETER KNOB IT FUNCTIONS OPERATIONALLY AS A FIXED-SPEED TOGGLE FOR THE END USER UNLESS OPENED FOR INTERNAL MECHANICAL ADJUSTMENT OR RECALIBRATION