ASTM D2882 Test Method for Indicating the Wear Characteristics of Petroleum and Non-Petroleum Hydraulic Fluids in a Constant Volume Vane Pump
4. Apparatus
4.1 The basic system consists of the following:
4.1.1 Power System Capability, with 11 kw (15 hp) as suggested minimum requirement.

4.1.2 Vane Pump, rotary, replacement cartridge type3 (Vickers 104C or 105C rated at 28.4 L/min (7.5 gal/min) flow at 1200 r/min, 49°C (120°F), and 6.89 MPa (1000 psi)).
4.1.2.1 There are to be no modifications to the pump housing such as plugging the drain hole in the pump body or drilling and tapping a hole in the head for an external drain.

4.1.3 Reservoir, 18.9 L (5 gal) or 56.7 L (15 gal) steel equipped with a removable 60 mesh stainless steel finger.

NOTE 3 - A tight fitting stainless steel lid and a 6-mm (1/4-in.) vent are recommended. If an acrylic lid is used, compatability problems with some non-petroleum fluids can occur.

4.1.3.1 The reservoir can be square or rectangular (with a flat bottom) or cylindrical (with a spherical or a cone-shaped bottom) and must be designed so as to avoid air entrainment in the fluid. The use of stainless steel is required to avoid surface rusting in the vapor space area. When using a stainless steel lid, it should not be fastened in place until the fluid is visibly deaerated (4.4.5). The use of a filter on the vent is optional. For a 56.8 L (15 gal) fluid charge a minimum 56.8 L reservoir is required.

NOTE 4 - A finger screen having a diameter of 76 mm (3 in.) and height of 64 mm (2.5 in.) has been found to be satisfactory.

4.1.4 Outlet Pressure Control Valve.

4.1.5 Temperature-Control Device.

4.1.6 Temperature Indicators with appropriate sensors for fluid in and out temperatures.

4.1.7 Pressure Indicators for pump discharge and filter pressures.

4.1.8 Heat-Exchanger System (heating and cooling), suggested minimum size 1.4 m2(15 ft2).

4.1.9 Filter Unit, 25-µm, (nominal) replaceable paper element with housing. Two new filter elements are required for each test.

4.1.10 Flow-Measuring Device.

4.1.11 Low-Level or High-Temperature Safety System, or both.

4.2 The various components of the test system shall be placed in the system as indicated in Fig. 1. The test system must be arranged so that complete draining is possible with no fluid trap areas. Fig. 2 and Fig. 3 are pump cartridge and total pump diagrams for the required pump.
4.2.1 A check should be made to ensure that the fluid to be tested is not corrosive to any metals in the system.

NOTE 5 - The use of galvanized iron, aluminum, zinc, and cadmium should be avoided due to their high potential for corrosion in the presence of many non-petroleum hydraulic fluids.

4.2.2 The test pump must have right hand rotation (clockwise rotation as viewed from pump drive end).

4.2.3 The reservoir bottom must be mounted sufficiently higher than the pump inlet so a positive pressure is maintained at the pump inlet to prevent cavitation.

NOTE 6 - A distance of 610 mm (24 in.) from the centerline of the pump housing inlet to the top of the fluid surface in the reservoir has been found to be satisfactory.

4.2.4 The inlet line (from the reservoir to the pump intake) should have an ID of at least 25 mm (1 in.).

4.2.5 Shut-off valves must be provided in the reservoir outlet line and in the line downstream of the pressure-control device. Care must be taken so that these valves do not allow air leakage and do not restrict flow of fluid.

4.2.6 The high pressure discharge line (from the pump to the pressure control valve) should be 19 mm (3/4 in.) Schedule 160 steel or stainless steel pipe.

4.2.7 The fluid return line and fittings (from the pressure control valve to the filter, flow counter, heat exchanger, and reservoir) should have an ID of at least 19 mm (3/4 in.).

4.2.8 The fluid return to the reservoir must be below the fluid level and away from the reservoir outlet located in the bottom of the reservoir.

4.2.9 The test fluid temperature must be measured within 102 mm (4 in.) of the pump inlet. The sensing probe must be inserted into the midpoint of flow.

4.2.10 The fluid cooler should be located above the center line of the pump to allow for good drainage.

5. Sampling
5.1 The sample of fluid shall be thoroughly representative of the material in question and the portion used for the test shall be thoroughly representative of the sample itself.