Oils that combine a high flashpoint with high dielectric strength have long been used as an insulating medium in transformers, switchgear and other electrical apparatus.
To ensure that the dielectric strength of the oil does not deteriorate however, proper maintenance is essential, and the basis of proper maintenance is testing for many electric equipments used in power system and enterprises, inner insulation is mostly oil-insulated. Oil dielectric strength test is one of the essential routine tests.
Our HK-507A oil dielectric breakdown tester is the ideal testing device for oil dielectric strength. The test sets are fully automatic. Our products have been used by many power enterprises all over the world.
Technical parameters
1.Voltage: AC220V±10%
2.Frequency : 50 Hz ± 1Hz
3.Power : < 200W
4.Output :0~60kV; 0~80kV(alternative)
5.Voltage booster capacity: 1.5kVA
6.Voltage rise rate: 2.0 ; 3.0; (adjustable)
7.Voltage total harmonic distortion: <3%
8.Dimension : 470 X 390 X 4209.Weight: 40kg
HK-0430A Boiling Point of Engine Coolants apparatus is designed and manufactured according to ASTM D1120 Standard Test Method for Boiling Point of Engine Coolants.
The apparatus covers the determination of the equilibrium boiling point of engine coolants. The equilibrium boiling point indicates the temperature at which the sample will start to boil in a cooling system under equilibrium conditions at atmospheric pressure.
Technical parameters
1.Supply voltage: AC 220V±20% 50Hz
2.Heating power: 0~230W (Continuously adjustable)
3.Temperature control mode: Solid-state voltage regulator (Stepless)
4.adjustable display: AC voltmeter 0~250V
5.Ambient requirement: temperature: 10~40°C;Humidity≤85%
HK-0109 apparatus for the determination of Water Washout Characteristics of Lubricating Greases conforms to the ASTM D1264 standard.
This apparatus covers the evaluation of the resistance of a lubricating grease to washout by water from a bearing, when tested at 38 and 79°C (100 and 175°F) under the prescribed laboratory conditions.
It is not to be considered the equivalent of service evaluation tests. Precision and bias was determined using grease ranging from NLGI 3 to 0 grades in the research report
Technical parameters
1.Rated voltage: AC 220V±10% 50Hz or 110V±10% 60Hz
2.Sink heating power: 500W
3.Sink temperature range: Room temperature ~ 100℃,continuously adjustable
4.Control temperature accuracy: ± 2 ℃
5.Total power: 600 W
6.Spray water: 5 ± 0.5ml/s.
7.Bearing speed: 600 ± 30r/min
8.Ambient requirements: Temperature: 10～40℃ Humidity≤85%
HK-0093 Solid particulate pollutant tester for fuel jet conforms to the ASTM D2276 Standard Test Method for Particulate Contaminant in Aviation Fuel by Line Sampling.
The apparatus provides a gravimetric measurement of the particulate matter present in a sample of aviation turbine fuel by line sampling.
The objective is to minimize these contaminants to avoid filter plugging and other operational problem .It is used to test particulate contaminant in aviation turbine fuel using a field monitor.
Technical parameters
1.Rated voltage:AC220V±10% 50Hz
2.Power:250W
3.Pressure display:0~ 0.1 MPa
4.Glass sand core filter:5L
5.Filter film sheet:0.8um≤0.1g
6.Limit negative pressure value:≥0.09 MPa
7.Adjustment range:0.02MPa ~ 0.09MPa
8.Exhaust rate:> 20L/min
9.Solvent bottle:500ml
10.Ambient requirementsTemperature:10~40°C;Humidity≤85%
HK-4507 Softening Point of Asphalt (Ring-and-Ball test apparatus) conforms to the ASTM D36 Standard Test Method for Softening Point of Bitumen (Ring-and-Ball Apparatus).
The apparatus covers the determination of the softening point of bitumen in the range from 30 to 157°C [86 to 315°F] using the ring-and-ball apparatus immersed in distilled water [30 to 80°C] or USP glycerin (above 80 to 157°C).
Technical parameters
1.Test cup：Small partφ19±0.1mm, large partφ23-1.0mm, height 6.4±0.1mm
2.Steel ball：Covers on brass billet, the other three locating studs control the steel ball to fall
3.Steel ball positioner：freely in the middle of the test cup through the gap over the locating studs.
4.Standard ball：Diameterφ9.5mm, weight 3.50g±0.05g
5.Bracket：It gets two pivots to contact upper support plate, mid-support plate and lower support plate and fix the distance 25mm. On the pivots, 51mm from mid-support plate there is a mark of scribed line which is as index of the height pouring water or glycerin.
6.Beaker：Volume 800ml, diameter is aboutφ90mm, height is no less than 140mm.
7.Thermometer：ASTM 15C and 16C
This apparatus conforms to the ASTM D482Standard Test Method for Ash from Petroleum Products.
It is used for determination of ash in the range 0.001–0.180 mass %, from distillate and residual fuels, gas turbine fuels, crude oils, lubricating oils, waxes, and other petroleum products, in which any ash-forming materials present are normally considered to be undesirable impurities or contaminants .
The apparatus is limited to petroleum products which are free from added ash-forming additives, including certain phosphorus compounds.
Technical parameters
1.Rated voltage:AC220V±10% 50Hz
2.Heating power:5000W
3.Temperature control mode:temperature controller
4.Temperature measurement mode:nickel-chromium——Nickel-silicon galvanic couple
5.Temperature control precision:±5℃
6.Temperature control range:100~1200℃
7.Ambient requirements:Temperature:5~40℃
8.Humidity≤85%
HK-384 calorific value tester for petroleum products, conforms to standard ASTM D240 Standard Test Method for Heat of Combustion of LiquidHydrocarbon Fuels by Bomb Calorimeter, which is suitable for testing the gross calorific value and net calorific value of the petroleum products without water(gasoline,jet fuel, diesel oil and heavy oil)
Technical Parameters
1.Rated voltage: AC 220V±10% 50Hz
2.Calorific capacity: 14000 to 15000J/K
3.Temperature range: 10 to 35℃
4.Resolution ratio: 0.001℃
5.Random error: ≤0.2%(C Class)
6.Max pressure of oxygen bomb: 20MPa
7.Ambient requirement: Temperature: 15 to 28℃ Humidity≤85% and the temperature fluctuation must be within 1℃ during a test
HK-7305 Apparatus for water separability of petroleum oils and synthetic fluid conforms to the ASTM D1401 Standard Test Method for Water Separability of Petroleum Oils and Synthetic Fluids.
This apparatus provides a guide for determining the water separation characteristics of oils subject to water contamination and turbulence. It is used for specification of new oils and monitoring of in-service oils.And it covers measurement of the ability of petroleum oils or synthetic fluids to separate from water.
Although developed specifically for steam-turbine oils having viscosities of 28.8–90 mm2/s at 40°C, this test method may be used to test oils of other types having various viscosities and synthetic fluids at other test temperatures. It is recommended, however, that the test temperature be raised to 82 ± 1°C when testing products more viscous than 90 mm2/s at 40°C.
Technical parameters
1.Rated voltage: AC 220V±10%; 50Hz
2.Power: 2000W
3.Temperature: Digital display temperature controller
4.Temperature range: Room temperature~100°C
5.Temperature sensor: Pt100 (Platinum resistor)
6.Bath temperature mixing method: Motor agitation, 1200r/min
7.Oil sample mixing method: Motor agitation, 1500r/min
8.Control temperature accuracy: ±0.5°C
9.Ambient requirements: Temperature: 10~40°C; Humidity≤85%
