ISO 10770-2:2012 PDF

Name: ISO 10770-2:2012 — Hydraulic fluid power — Electrically modulated hydraulic control valves — Part 2: Test methods for three-port directional flow-control valves
SKU: ISO 10770-2:2012
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Hydraulic fluid power — Electrically modulated hydraulic control valves — Part 2: Test methods for three-port directional flow-control valves

Название (английский):

ISO 10770-2:2012

Hydraulic fluid power — Electrically modulated hydraulic control valves — Part 2: Test methods for three-port directional flow-control valves

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 31
Дата публикации:: 29 ноября 2012 г.
Издание:: ISO IS 10770 edition 2 version 1
ICS:: 23.100.50

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Описание (английский):

ISO 10770-2:2012 describes methods for determining the performance characteristics of electrically modulated hydraulic three-port directional flow-control valves. This type of electrohydraulic valve controls the direction and amount of hydraulic flow in a hydraulic system.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 10770-2:2012 - Hydraulic fluid power - Electrically modulated hydraulic control valves - Part 2: Test methods for three-port directional flow-control valves - defines standardized laboratory test methods to determine the performance characteristics of electrically modulated, three‑port directional flow‑control (electrohydraulic) valves. The document is intended to make valve performance data consistent and comparable for system design, component selection and quality verification.

Key topics and technical requirements

Scope and purpose: Methods to measure hydraulic and electrical performance of three‑port directional flow‑control valves when operated with their amplifiers. Tests aim to characterize flow, pressure and electrical behavior under repeatable conditions.

Standard test conditions: Ambient temperature 20 °C ± 5 °C; fluid viscosity ~32 ± 8 cSt (VG 32 or VG 46); fluid cleanliness to be reported per ISO 4406; return pressure per manufacturer recommendations.

Test installation: Use one of the standard test circuits (figures provided) and account for safety; hydraulic performance tests are performed on valve+amplifier combinations; electronic test equipment should have bandwidth ≥10× max test frequency.

Instrumentation accuracy & dynamic range: Instrumentation Class B per ISO 9110-1:1990 (e.g., pressure ±1 % of rated valve pressure drop, flow ±2.5 %, input signal ±1.5 %). Dynamic equipment must not introduce >1 % error.

Electrical tests (valves without integrated electronics): Coil resistance (cold/hot), optional coil inductance measurement (time‑constant method), and insulation resistance (500 V DC test) for current‑driven coils.

Performance tests:

Steady‑state: internal leakage, metering output flow vs input signal (rated flow, flow gain, linearity, hysteresis, symmetry, spool lap, threshold), output flow vs pressure drop, temperature effects, pressure gain, pressure null shift, fail‑safe function.
Dynamic tests: transient response, frequency response and other time‑dependent behaviours.

Reporting: Presentation of results and required test report elements are specified; Annex A provides testing guidance.

Practical applications - who uses this standard

Valve manufacturers - for product development, type‑testing and specification sheets.

Hydraulic test laboratories - to perform consistent, accredited performance and acceptance testing.

OEMs and system designers - to select valves with compatible flow gain, dynamic response and fail‑safe behaviour for industrial or mobile hydraulic systems.

Procurement/specifiers and certification bodies - to verify supplier data and ensure interchangeability and safety.

R&D and quality control - to compare design iterations and monitor production consistency.

Related standards

ISO 10770 series (Part 1: four‑port valves; Part 3: pressure control valves)

ISO 1219‑1 (graphical symbols), ISO 5598 (vocabulary), ISO 3448 (viscosity grades), ISO 4406 (contamination coding), ISO 9110‑1 (measurement accuracy)

Keywords: ISO 10770-2:2012, electrically modulated hydraulic control valves, three-port directional flow-control valves, test methods, hydraulic valve performance, flow gain, pressure gain, coil resistance, insulation resistance.

ISO 10770-2:2012 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Practical applications - who uses this standard

Related standards

Технические детали

ISO 9110-1:1990

Hydraulic fluid power — Measurement techniques — Part 1: General measurement principles

BS ISO 4406:2021

Hydraulic fluid power. Fluids. Method for coding the level of contamination by solid particles.

BS ISO 10770-1:2009

Hydraulic fluid power. Electrically modulated hydraulic control valves. Test methods for four-port directiona…

ISO 1219-1:2012/Amd 1:2016

Fluid power systems and components — Graphical symbols and circuit diagrams — Part 1: Graphical symbols for c…

ISO 5598:1985

Fluid power systems and components — Vocabulary

ISO 3448:1975

Industrial liquid lubricants — ISO viscosity classification

SIST ISO 9110-1:2021

Hydraulic fluid power -- Measurement techniques