Standard
Standard
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Technical committeeTypeAcronymISO 11500CommitteePublished year2008Description
ISO 11500:2008 specifies an automatic particle-counting procedure for determining the number and sizes of particles present in hydraulic-fluid bottle samples of clear, homogeneous, single-phase liquids using an automatic particle counter (APC) that works on the light-extinction principle.
ISO 11500:2008 is applicable to the monitoring of the cleanliness level of fluids circulating in hydraulic systems, the progress of a flushing operation, the cleanliness level of support equipment and test rigs and the cleanliness level of packaged stock.
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Technical committeeTypeAcronymISO 11171CommitteePublished year2020Description
This document specifies procedures for the following:
a) primary particle-sizing calibration for particle sizes 1 µm(c) and larger, sensor resolution and counting performance of liquid automatic particle counters that are capable of analysing bottle samples;
b) secondary particle-sizing calibration using suspensions verified with a primary calibrated APC;
c) establishing acceptable operation and performance limits;
d) verifying particle sensor performance using a test dust;
e) determining coincidence and flow rate limits.
This document is applicable for use with hydraulic fluids, aviation and diesel fuels, engine oil and other petroleum-based fluids. This document is not applicable to particle-sizing calibration using NIST SRM 2806b primary calibration suspensions.
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Technical committeeTypeAcronymISO 11170CommitteePublished year2013Description
ISO 11170:2013 defines a sequence of tests for verifying filter elements. It can be used to check their hydraulic, mechanical and separation characteristics.
ISO 11170:2013 is not intended to qualify a filter for a particular duty or replicate conditions of service. This can only be done by a specific test protocol developed for the purpose, including actual conditions of use (e.g. the operating fluid).
The procedure in ISO 11170:2013 is applicable to individual fluids or types of fluids that have similar chemistry.
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Technical committeeTypeAcronymISO 10816-21:2015CommitteePublished year2015KeywordsDescription
ISO 10816-21:2015 specifies the measurement and evaluation of mechanical vibration of wind turbines and their components by taking measurements on non-rotating parts. It applies to horizontal axis wind turbines with mechanical gearbox and rated generator output exceeding 200 kW and the following design and operational characteristics: a) installation on supporting systems (tower and foundation) made of steel and/or concrete; b) horizontal axis rotor with several rotor blades; c) rotor bearing separate from or integrated into the gearbox; d) generators driven via gearbox; e) generators of the synchronous or asynchronous type (mostly equipped with 4-pole generator); f) generators with only a fixed pole number or which are pole-changeable for speed adjustment; g) output control by rotor blades (pitch or stall wind turbines); h) generator coupled to the power grid via converter or directly.
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Technical committeeTypeAcronymISO 10771-1CommitteePublished year2015Description
ISO 10771-1:2015 specifies a method of fatigue testing the pressure-containing envelopes of components used in hydraulic fluid power systems under sustained steady cyclic internal pressure loads.
This part of ISO 10771 is only applicable to component pressure-containing envelopes that
- are manufactured from metals,
- are operated at temperatures that exclude creep and low-temperature embrittlement,
- are only subjected to pressure-induced stresses,
- are not subjected to loss of strength due to corrosion or other chemical action, and
- might include gaskets, seals, and other non-metallic components; however, these are not considered part of the pressure-containing envelope being tested (see 5.7).
ISO 10771-1:2015 does not apply to piping as defined in ISO 4413 (i.e. connectors, hose, tubing, pipe). See ISO 6803 and ISO 6605 for methods of fatigue testing of piping devices.
ISO 10771-1:2015 establishes a general test method that is applicable for many hydraulic fluid power components, but additional requirements or more specific methods that can be required for particular components are contained in the annexes or other standards.
Test pressure is to be determined by the user. See ISO/TR 10771‑2 for a possible rating method.
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Technical committeeTypeAcronymISO 10770-3CommitteePublished year2020Description
This document describes test methods for determining the performance characteristics of electrically modulated hydraulic pressure control valves.
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Technical committeeTypeAcronymISO 10767-2CommitteePublished year1999DescriptionTechnology
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Technical committeeTypeAcronymISO 10767-1CommitteePublished year2015Description
ISO 10767-1:2015 establishes a test procedure for measuring the source flow ripple and source impedance of positive-displacement hydraulic pumps. It is applicable to all types of positive-displacement pumps operating under steady-state conditions, irrespective of size, provided that the pumping frequency is in the range from 50 Hz to 400Hz.
Source flow ripple causes fluid borne vibration (pressure ripple) and then airborne noise from hydraulic systems. This procedure covers a frequency range and pressure range that have been found to cause many circuits to emit airborne noise which presents a major difficulty in design of hydraulic fluid power systems. Once the source flow ripple and source impedance of hydraulic fluid power pump are known, the pressure ripple generated by the pump in the fluid power system can be calculated by computer simulation using the known ripple propagation characteristics of the system components. As such, this part of ISO 10767 allows the design of low noise fluid power systems to be realized by establishing a uniform procedure for measuring and reporting the source flow ripple and the source impedance characteristics of hydraulic fluid power pumps.
In ISO 10767-1:2015, calculation is made for blocked acoustic pressure ripple as an example of the pressure ripple. An explanation of the methodology and theoretical basis for this test procedure is given in Annex B. The test procedure is referred to here as the two pressures/two systems method. Ratings are obtained as follows:
a) source flow ripple (in the standard "Norton" model) amplitude, in cubic meter per second[m3/s], and phase, in degree, over 10 individual harmonics of pumping frequency;
b) source flow ripple (in the modified model) amplitude, in cubic meter per second [m3/s], and phase, in degree, over 10 individual harmonics of pumping frequency; and its time history wave form,
c) source impedance amplitude, in Newton second per meter to the power of five [(Ns)/m5]., and phase, in degree, over 10 individual harmonics of pumping frequency;
d) blocked acoustic pressure ripple, in MPa (1 MPa = 106 Pa) or in bar (1 bar = 105 Pa), over 10 individual harmonics of pumping frequency; and the RMS average of the pressure ripple harmonic f1 to f10.
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Technical committeeTypeAcronymISO 10766CommitteePublished year2014Description
ISO 10766:2014 specifies the preferred range of nominal dimensions and associated tolerances for a series of hydraulic cylinder piston and rod housings for rectangular-section-cut bearing rings, of the type shown in Clause 5, for applications in the following range of dimensions:
for cylinders with bores of 16 mm to 500 mm, inclusive;
for rods with diameters of 12 mm to 450 mm, inclusive.
ISO 10766:2014 does not give details of cut bearing ring design, because the manner of construction of cut bearing rings varies with each manufacturer.Technology -
Technical committeeTypeAcronymISO 10763CommitteePublished year2020Description
This document specifies sizes and nominal working pressures for seamless and welded precision steel tubes with outside diameters in accordance with ISO 4397, and wall thicknesses and mechanical properties in accordance with ISO 3305. The nominal working pressures included in this document reflect a design factor ratio of 4 to 1 applied to the calculated burst pressures.
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