ISO 5781 pdf download – Hydraulic fluid power – Pressure-reducingvalves, sequence valves, unloading valves,throttle valves and check valves 一 Mounting surfaces.
6.5 Mounting surface dimensions for pressure-reducing valves, sequence valves, unloading valves, throttle valves and check valves with main ports of 23,4mm maximum diameter (code: 5781.06-10.0-00) are given in Figure 10.
6.6 Mounting surface dimensions fo pressure-reducing valves, sequence valves, unloading valves, throttle valves and check valves with main ports of 32mm maximum diameter (code: 5781-10-13-0-00) are given in Figure 13.
7 Port marking
7.1 The port symbols to be used for pressure-reducing valves, sequence valves, unloading valves, throttle valves and check valves shall be selected from the figures specified in 7.2 to 7.11.
7.2 The symbols for directly-operated pressure-reducing valves, sequence valves, unloading valves, throttle valves and check valves with main ports of 4,5 mm maxitium diameter (code: 5781-02-01-0-00) are given in Figure 2.
7.3 The symbols tot pilot-operated pressure-reducing valves. sequence valves and unloading valves with main ports 014,5mm maximum diameter (code: 5781-02-01-0-00) are given in Figure 3.
7.4 The symbols for dwectly-operaled pressure-reducing valves, sequence valves, unloading valves, throttle valves and check valves with main ports of 7,5mm maxinium diameter (code: 5781-03-04-0-00) are given in Figure 5.
7.5 The symbols tot pilot-operated pressure-reducing valves, sequence valves and unloading valves with main ports of 7,5mm maximum diameter (code: 5781-0304-0-00) are given in Figure 6.
7.6 The symbols for dwectly-operated pressure-reducing valves, sequence valves, unloading valves, throttle valves and check valves with main ports of 14,7mm maximum diameter (code: 5781-06-07-0-00) are given in Figure8
7.7 The symbols lot pilot-operated pressure-reducing valves, sequence valves and unloading valves with main ports of 14,7mm maximum diameter (code: 5781-06-07-0-00) are given in Figure 9.
7.8 The symbols for directly’operated pressure-reducing valves, sequence valves, unloading valves, throttle valves and check valves wilt) main ports of 23,4 mm maximum diameter (code: 5781 -08-10-0-00) are given in Figure 11.
7.9 The symbols for pilot-operated pressure-reducing valves, sequence valves and unloading valves with main ports of 23.4mm maximum diameter (code. 5781-08-10-0-00) are given in Figure 12.
7.10 The symbols for dwectly-operated pressure-reducing valves, sequence valves, unloading valves, throttle valves and check valves with main ports of 32mm maximum diameter (code: 5781-10.13-0-00) are given in Figure 14.
7.11 The symbols for pilot-operated pressure-reducing valves, sequence valves and unloading valves with main ports of 32mm maximum diameter (code: 5781-10-13-0-00) are given in Figure 15.
7.12 The direction A to B should not be used In new designs.
8 Modular stack valves
For modular stack valves, the mounting surfaces and port markings defined in ISO 4401 shall be used.
9 Rated pressure
For an indicahon of the maximum limit ol the rated pressure. see paragraph I of Figures 1, 4, 7, 10 and 13.
10 Identification statement (Reference to this International Standard)
It is strongly recommended to manufacturers who have chosen to conform to this Internaflonal Standard that the following statement be used in test reports, catalogues and sales literature:
“Mounting surface dimensions 01 pressure-reducing valves, sequence valves, unloading valves, throttle valves and check valves conlomi to ISO 5781:2000, Hydraulic tlwd power — Pressure-reducing valves, sequence valves. unloading valves. throttle valves and check valves — Mounting surfaces.”
ISO 5781 pdf download – Hydraulic fluid power – Pressure-reducingvalves, sequence valves, unloading valves,throttle valves and check valves 一 Mounting surfaces
