+44 (0)20 8600 9920
+44 (0)20 8600 9921
HFRR (High Frequency Reciprocating Rig)
/ Accessories
HFRR/HFR2 Gasoline Conversion Kit (Part code: HFRGKIT)
The Gasoline Conversion Kit has been developed to allow for safer and more repeatable lubricity testing of gasolines. The high volatility of gasoline means that even at room temperature a significant fraction of the gasoline will evaporate from an open specimen holder, changing additive concentration in the remainder and posing an explosion hazard.
Recent developments in gasoline technology have led to an interest in using the HFRR for gasoline lubricity assessment. Because of the high volatility of gasoline, special precautions must be taken to prevent excessive evaporation during the test.
Research at Tribology Laboratory at Imperial College, London has also shown that an increase in sample volume improves repeatability with gasolines.
The gasoline lower test specimen holder (the gasoline bath) has been designed to hold up to 15ml of test fuel. To accommodate the increase in size of the gasoline bath the HFRR electromagnetic oscillator has been raised by inserting two blocks under the oscillator supports.
The upper specimen holder has been redesigned to accommodate a two-piece PTFE sliding seal which reduces evaporation to a minimum. The larger outer ring clips securely around the outside of the gasoline bath. The upper specimen holder is inserted through the hole in the smaller inner part of the seal which forms the upper part of the sliding seal.
HFRR Gasoline Kit with Gasoline Holder Setup
HFRR Gasoline Kit with Standard Holder Setup
The PTFE sliding seal has many benefits:
- PTFE is very resistant to solvents and most other chemicals and so will not affect the composition of the gasoline.
- It can be cleaned in the same solvents and at the same time as the test specimens.
- The sliding friction from the seal is insignificant compared to the friction between the test specimens.
- There is therefore no impact on the test results.
Converting an existing HFRR/HFR2 to test gasoline is simple and should take approximately 30 minutes. With the use of the aluminium heater block extension, normal HFRR diesel lubricity testing can continue using the standard specimen holders after a quick calibration.
Replacement items for use with the Gasoline Conversion Kit can be obtained from your distributor or PCS Instruments.
The Gasoline kit comprises of:
- Gasoline Upper Specimen Holder (Part code: HFRGUSH)
- Gasoline Lower Specimen Holder (Part code: HFRGLSH)
- PTFE Gasoline Seal Set (Part code: HFRGSEAL)
- Heater Extension block (this block is used when a standard lower specimen holder is required)
- Vibrator Support Extension Blocks including replacement bolts. (Raises the HFR mechanical unit to the required height for combined gasoline and diesel fuel testing)
- Gasoline Screw set (Part code: HFRGSS). The lower specimen holder screws are longer than the standard HFRR screw set to accommodate the extra height when the vibrator is raised.
- Mechanical Unit Counter Weight.
(The HFR mechanical unit requires re-balancing when the gasoline upper specimen holder is used. The counter weight adjustment is located at the rear of the mechanical unit) - Replacement mechanical unit gasoline cover
- Manual and Installation tool.
