ISO/TC 131/SC 5/WG 2 - Hydraulic control products

This document describes test methods for determining the performance characteristics of electrically modulated hydraulic pressure control valves.

This document specifies methods for determining, under steady-state conditions, the pressure differential caused by the flow through any given path in a hydraulic fluid power valve. Requirements for test installations, procedures and presentation of results are specified.

This document defines an identification code for hydraulic valve mounting surfaces and for hydraulic cartridge valve cavities that are defined in other International Standards (see Bibliography). This document is not applicable to mounting surfaces and cartridge valve cavities that do not conform to these International Standards. This document does not require that the hardware be marked with the identification code.

ISO 5781:2016 specifies the dimensions and other data relating to surfaces on which hydraulic pressure-reducing valves, sequence valves, unloading valves, throttle valves and check valves are mounted in order to ensure interchangeability. It applies to mounting surfaces for hydraulic pressure-reducing valves, sequence valves, unloading valves, throttle valves and check valves, which represent current practice; they are generally applicable to industrial equipment.

ISO 7368:2016 specifies only geometrical data relating to cavities in which two-port hydraulic slip-in cartridge valves are mounted in order to ensure interchangeability. NOTE For example, this document does not specify rated pressures. It applies to cavities for two-port hydraulic slip-in cartridge valves which are generally applicable to industrial equipment.

ISO 6263:2013 specifies the dimensions and other data relating to surfaces on which hydraulic compensated flow-control valves are mounted in order to ensure interchangeability. It applies to mounting surfaces for hydraulic compensated flow-control valves which represent current practice; they are generally applicable to industrial equipment.

ISO 7790:2013 specifies clamping dimensions of four-port modular stack valves and four-port directional control valves, sizes 02, 03, 05, 07, 08, and 10, on mounting surfaces. The dimensions and sizes conform to ISO 4401 so as to ensure interchangeability of these valves and to reduce the number of fixing devices to be used. It applies to clamping dimensions of four-port modular stack valves and four-port directional control valves which represent current practice. They are generally applicable to industrial equipment.

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.

ISO 16873:2011 specifies the mounting surfaces for pressure switches and gives guidelines for the standardized arrangement of the connections for pressure switches and for the mounting of plates and hydraulic valves.

ISO 10770-1:2009 describes methods for determining the performance characteristics of electrically modulated, hydraulic, four-port directional flow-control valves. ISO 10770-1:2009 describes methods of testing electrohydraulic, four-port directional flow-control valves. This type of electrohydraulic valve controls the direction and flow in a hydraulic system.

ISO 7789:2007 specifies the dimensions and provides other data relating to cavities in which two-, three- and four-port, screw-in cartridge valves are mounted in order to ensure interchangeability. ISO 7789:2007 is applicable to two-, three- and four-port screw-in cartridge valves generally used in industrial and mobile equipment.

ISO 4401:2005 specifies the dimensions and other data relating to surfaces on which four-port hydraulic directional control valves are mounted in order to ensure their interchangeability. It applies to mounting surfaces for four-port hydraulic directional control valves which represent current practice. They are generally applicable to industrial equipment.

ISO 16874:2004 provides identification coding for manifolds used in hydraulic systems and for component installation features (for example, mounting surfaces or cavities) of such manifolds. It specifies identification codes to be marked on manifold blocks and correlated with product and service documentation such as circuit diagrams, bills of material and assembly drawings, for the purpose of facilitating assembly, installation, use and service of systems in which the manifolds are applied. The codes define a unique identifier traceable to associated documentation for each mounting surface or cavity. The installed component may be marked or tagged with the same identifier when such marking is necessary for clarity in assembly or service.

Cancels and replaces the first edition (1989). Specifies the following characteristics and requirements for a general purpose two-pin electrical plug connector with earth contact for use with a single solenoid: the electrical characteristics of the connector; the dimensions of the pins and earth contact; the means for fixing the socket to the plug; the sealing procedure between the plug and the socket; usage requirements. The electrical plug connector specified herein is intended to be used under working conditions where the connector cannot be damaged by external action.

Cancels and replaces the second edition (1985). Specifies the following characteristics and requirements for a general purpose three-pin electrical plug connector with earth contact for use with a single solenoid: the electrical characteristics of the connector; the dimensions of the pins and earth contact; the means for fixing the socket to the plug; the sealing procedure between the plug and the socket; usage requirements. The electrical plug connector specified herein is intended to be used under working conditions where the connector cannot be damaged by external action.

Specifies the dimensions of surfaces on which servovalves are mounted in order to ensure interchangeability. Applies primarily to electrohydraulic flow-control servovalves. In addition, may be used for pressure-control servovalves. If the valve is used in a three-port application, either service port (A and B) may be omitted.

Specifies rules for the identification. Applies in particular to valves which will be developed in future with two and three ports, where today's practice of marking valve ports is different. The identification rules apply to those ports which provide the connection between two valves or between a valve and a pipe.

ISO 16783:2002 specifies the mounting surfaces for pressure switches and gives guidelines for the standardized arrangement of the connections for pressure switches and for the mounting of plates and hydraulic valves.

Defines an identification code for hydraulic valve mounting surfaces and for hydraulic cartridge valve cavities consisting of five groups of numbers. Examples are given for each valve type.

Cancels and replaces the first edition (1980). Specifies the dimensions and other data relating to surfaces on which four-port hydraulic directional control valves are mounted in order to ensure their interchangeability. Applies to mounting surfaces of these valves which represent current practice.

Specifies the dimensions and other data relating to cavities in which valves are mounted in order to ensure interchangeability. Applies to cavities for valves which are generally applicable to industrial equipment. The corresponding dimensions and sketches are given and illustrated in the figures 1 to 14. The informative annex A contains the bibliography.