ISO 7790 pdf download

ISO 7790 pdf download Hydraulic fluid power — Four-port modular stack valves and four-port directional control valves, sizes 02, 03, 05, 07, 08 and 10 — Clamping dimensions
1 Scope
This International Standard specifies clamping dimensions of four-port modular stack valves and fourport directional control valves, sizes 02,03, 05,07, 08, and 10, on mounting surfaces, The dimensionsand sizes conform to ISO 4401 so as to ensure interchangeability of these valves and to reduce thenumber offixing devices to be used.
lt applies to clamping dimensions of four-port modular stack valves and four-port directional controlvalves which represent current practice. They are generally applicable to industrial equipment.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and areindispensable for its application. For dated references, only the edition cited applies. For undatedreferences, the latest edition of the referenced document (including any amendments) applies.
SO 4401, Hydraulic fluid power — Four-port directional control valves — Mounting surfaces
SO 5598, Fluid power systems and components – Vocabulary
SO 5783, Hydraulic fluid power — Code foridentification ofvalve mounting surfaces and cartridge valve cavities
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 5598 apply
4 Symbols
For the purposes of this International Standard, the following letter symbols apply:
a) Hi identifies clamping length for the fixing devices on directional control valves;
b) Hz identifies overall heights of modular stack valves.
5Tolerances
For tolerances and other data relating to the side of a modular stack valve on which another modularstack valve or a directional control valve is mounted, see ISO 4401.
Dimensions
Clamping dimensions for modular stack valves and directional control valves. sizes 02.03. 05.07.08and 10, in accordance with IS0 5783, with four service ports, are shown in Figure 1 and given in Tables iand 2. Table 1 lists the preferred dimensions and should be used for new valve designs. Table 2 lists
7 Working pressure
For an indication of the maximum limit of the working pressure, see Note in Table 1.
8 Identification statement (Reference to this International Standard)
Use the following statement in test reports, catalogues, and sales literature when electing to comply with this International Standard:
“Modular stack valves and directional control valves clamping dimensions conform to ISO 7790,Hydraulic fluid power — Four-port modular stack valves and four-port directional control valves, sizes 02,03, 05, 07, 08 and 10 — Clamping dimensions.”