دانلود دفترچه تاکوژنراتور ریکس رود مدل ZDR10
Pressure reducing valve direct operated, Type ZDR 10 D
Nominal size 10
| Maximum operating pressure 210 bar
Maximum flow 80 L/min Overview of contents Contents Features Function, section Ordering details Preferred types Symbols Technical data Characteristic curves Unit dimensions |
Page 1 2 3
3 3 4 5 6 |
Type ZDR 10 DP 2–5X/..Y..
Features
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Series 5X
by Bosch Rexroth AG, Industrial Hydraulics, D-97813 Lohr am Main
All rights reserved. No part of this document may be reproduced or stored, processed, duplicated or circulated using electronic systems, in any form or by any means, without the prior written authorisation of Bosch Rexroth AG. In the event of contravention of the above provisions, the contravening party is obliged to pay compensation.
Function, section
Valves of type ZDR 10 D.. are direct operated pressure reducing valves of sandwich plate design with pressure relief function of the secondary circuit. They are used for reducing the system pressure. Pressure reducing valves basically consist of the housing (1), a control spool (2), a compression spring (3), an adjustment element (4) as well as an optional check valve.
The secondary pressure can be set using the adjustment element (4).
Version “DA”
In the initial position the valve is open. The hydraulic fluid can freely flow from channel A1 to channel A2. At the same time the pressure in channel A2 is applied via the pilot line (5) to the spool area opposite the compression spring (3). When the pressure in channel A2 increases to a value higher than that set on the compression spring (3), the control spool (2) moves against the compression spring (3) to the control position and maintains the set pressure constant in channel A2.
The pilot signal and pilot oil are provided internally from channel A2 via the pilot line (5).
When the pressure in channel A2 continues to increase due to external forces acting on the consumer, the control spool (2) is shifted further against the compression spring (3).
This causes channel A2 to be connected to tank (channel TB) via the control edge (6) on the control spool (2) and housing (1). The amount of oil flowing to the tank prevents the pressure from increasing any further.
The leakage oil is always drained externally from the spring chamber (7) via channel TA.
A pressure gauge port (8) allows the secondary pressure of the valve to be checked.
A check valve can only be used with version “DA” to allow a free flow from channel A2 back to A1.
Versions “DP” and “DB”
With version “DP” the pressure is reduced in channel P1. The pilot signal and pilot oil are provided internally from channel P1. With version “DB” the pressure is reduced in channel P1; however, the pilot oil is taken from channel B.
Caution!
When the directional valve is in spool position P to A, the pressure in channel B must not exceed the set secondary pressure. Otherwise, the pressure is reduced in channel A.
When used without directional valve, TA and TB must be interconnected (e.g. in a cover plate).
When a directional poppet valve of type SE 10… is mounted, sandwich plate type HSZ10A078-3X/M00 (R900537264) must be used.
4 3 7 2 6 1 8
1) H-key with Material No. R9008158 is included within the scope of supply.
Preferred types (readily available)
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Type ZDR 10 DB..–5X/..YM.. Type ZDR 10 DA..–5X/..Y
Technical data (for applications outside these parameters, please consult us!)
General
| Installation | Optional | |
| Ambient temperature range | °C | –30 to +80 for NBR seals |
| –20 to +80 for FKM seals | ||
| Weight | kg | Approx. 2.8 |
| Hydraulic | ||
| Pressure fluid | Mineral oil (HL, HLP) to DIN 51 524 [1]);
Fast bio-degradable pressure fluids to VDMA 24 568 (also see RE 90 221); HETG (rape seed oil) 1); HEPG (polyglycols) [2]); HEES (synthetic ester) 2); other pressure fluids on request |
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| Cleanliness class to ISO code | Maximum permissible degree of contamination of the pressure fluid is to ISO 4406 (C) class 20/18/15 [3]) | |
| Pressure fluid temperature range | °C | –30 to +80 for NBR seals |
| –20 to +80 for FKM seals | ||
| Viscosity range | mm2/ | s 10 to 800 |
| Max. operating pressure (input) | bar | Up to 315 |
| Secondary pressure, (output) | bar | 25; 75; 150; 210 |
| Back pressure port T | bar | Up to 160 |
| Max. flow | L/min | Up to 80 |
Characteristic curves (measured at HLP46, ϑoil = 40 °C ± 5 °C)
Type ZDR 10 DA..–5X/.. Type ZDR 10 DP..–5X/.. and
Type ZDR 10 DB..-5X/..
pA-qV-characteristic curves pA-qV-characteristic curves
Flow in L/min → Flow in L/min →
Note
The curve characteristics remain, with low set pressures, the same in relation to the pressue rating.
∆pmin-qV-characteristic curves
Flow in L/min →
∆p-qV-characteristic curves
- A1 to A2
- A2 to TB (3rd flow path)
- A2 to A1 flow via check valve only
- A2 to A1 flow via check valve and fully open control cross-section
- P2 to P1
- P1 to TB (3rd flow path)
The characteristic curves for the pressure relief function are valid for the output pressure = zero over the entire flow range!
Unit dimensions (dimensions in mm)
- Adjustment element “1”
- Adjustment element “2”
- Adjustment element”3″
- Adjustment element “7”
- Space required to remove the key
- Valve fixing screw holes
- Locknut 24A/F
- Hexagon 10A/F
- Same seal rings for ports A, B, P, TA and TB
- Pressure gauge port G 1/4; 12 deep; internal hexagon 6A/F
Valve fixing screws
| Version | L1 | L2 | L3 | L4 | L5 | L6 | B1 | B2 | B3 |
| “DA” | 254 | 230 | 210 | 104 | 93 | 31.5 | 32.9 | 51 | 12 |
| “DB” and “DP” | 242 | 218 | 198 | 91 | – | 18.5 | 35 | – | – |
M6 DIN 912 – 10.9, Tighenting torque MA = 15.5 Nm, must be ordered separately.
Pipe threads “G” to ISO 228/1
Note:
For X and Y ports
(e. g. for NS 10 pilot operated directional valves) the special version code is SO30!
Required surface finish of mating piece
Notes
Bosch Rexroth AG Bosch Rexroth Limited
Industrial Hydraulics
D-97813 Lohr am Main Cromwell Road, St Neots,
Zum Eisengießer 1 • D-97816 Lohr am Main Cambs, PE19 2ES
Telefon 0 93 52 / 18-0 Tel: 0 14 80/22 32 56
Telefax 0 93 52 / 18-23 58 • Telex 6 89 418-0 Fax: 0 14 80/21 90 52 eMail documentation@boschrexroth.de E-mail: info@boschrexroth.co.uk
Internet www.boschrexroth.de
The data specified above only serves to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information. The details stated do not release you from the responsibility for carrying out your own assessment and verification. It must be remembered that our products are subject to a natural process of wear and ageing.
Notes
| Bosch Rexroth AG
Industrial Hydraulics D-97813 Lohr am Main Zum Eisengießer 1 • D-97816 Lohr am Main Telefon 0 93 52 / 18-0 Telefax 0 93 52 / 18-23 58 • Telex 6 89 418-0 eMail documentation@boschrexroth.de Internet www.boschrexroth.de |
Bosch Rexroth Limited
Cromwell Road, St Neots, Cambs, PE19 2ES Tel: 0 14 80/22 32 56 Fax: 0 14 80/21 90 52 E-mail: info@boschrexroth.co.uk |
The data specified above only serves to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information.
The details stated do not release you from the responsibility for carrying out your own assessment and verification. It must be remembered that our products are subject to a natural process of wear and ageing. |
- ) Suitable for NBR and FKM seals ↑
- ) Only suitable for FKM seals ↑
- ) The cleanliness class stated for the components must be adhered too in hydraulic systems. Effective filtration prevents faults from occurring and at the same time increases the component service life.For the selection of filters see catalogue sheets RE 50 070, RE 50 076 and RE 50 081. ↑
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