|
Parameter
|
Specification
|
|
Brand / Model
|
Rexroth DB20-1-5X/200
|
|
Order No.
|
R900502117
|
|
Product Type
|
Pilot-Operated Pressure Relief / Overload Valve
|
|
Adjustment Type
|
Manual screw adjustment with locking mechanism.
|
|
Port Size
|
Connection: G1/2" (according to ISO 228).
|
|
Setting Pressure Range
|
Maximum adjustable pressure setting is 200 bar.
|
|
Max. Flow Rate (approx.)
|
Up to 120 L/min (depending on model variant; confirm with datasheet).
|
|
Pressure Stage
|
Pilot-operated, 2-stage design.
|
|
Weight (approx.)
|
~3.2 kg (confirm with datasheet for exact value).
|
|
Note
|
Original German engineering. Designed for precise pressure limiting, system protection, and reduced pressure override.
|
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| R900504902 DB30-2-5X/350 |
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| R900505883 DB10-2-5X/315V |
| R900507009 DB20-1-5X/350 |
| R900511013 DB10K1-4X/100Y |
| R900513186 DB20-2-5X/100YUV |
| R900513667 DB20-2-5X/200V |
| R900516200 DB20-2-5X/100UV |
| R900519775 DB20-2-5X/200U |
| R900521784 DB30-7-5X/100 |
| R900522296 DB20-3-5X/200X |
| R900528354 DB10-1-4X/200XW65 |
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| R900529359 DBDS4K1X/100V |
| R900536812 DBEME10-5X/315YG24K31M |
| R900536813 DBEME20-5X/315YG24K31M |
| R900546617 DBET-5X/315G24K4M |
| R900546986 DBEE6-1X/315G24K31M |
| R900547401 DBEM10-5X/315YG24K4M |
| R900550746 DBW20B2-5X/100U6EG24N9K4 |
| R900551840 DBE6-1X/315G24K4M |
| R900552114 DBEM30-3X/315YG24K4M |
| R900569498 DB30-1-5X/100U |
| R900571796 DB30-2-5X/200V |
| R900587346 DB20-1-5X/315 |
| R900587347 DB20-2-5X/315X |
| R900587772 DB10-2-5X/200 |
| R900588131 DB30-2-5X/200 |
| R900589433 DB20-2-5X/100 |
| R900589603 DB20-1-5X/100 |
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| R900590330 DB30-2-5X/100U |
| R900590334 DB10-2-5X/315 |
| R900590618 DB20-2-5X/350 |
| R900590645 DB10-2-5X/50 |
| R900590646 DB10-2-5X/100 |
| R900590768 DB20-2-5X/200 |
| R900591126 DB10-2-5X/315X |
| R900591128 DB30-2-5X/315 |
| R900591150 DB30-2-5X/315X |
| R900591404 DB20-2-5X/315V |
| R900593404 DB10-2-4X/100W65 |
| R900593530 DB20-2-5X/315 |
| R900593564 DB30-2-5X/50 |
| R900593794 DB10-1-5X/350 |
| R900593795 DB30-1-5X/315 |
| R900593839 DB10-2-5X/100U |
| R900593840 DB10-2-5X/315U |
| R900409886 ZDB6VA2-4X/200V |
| R900409854 ZDB6VB2-4X/200V |
| R900409847 ZDB6VP2-4X/50V |
| R900409844 ZDB6VP2-4X/200V |
FAQ:
Q1: What is the primary function of the Rexroth DB20-1-5X/200 valve?
A: It is a two-stage pilot-operated pressure relief valve. Its primary function is to limit and precisely control the maximum pressure in a hydraulic circuit. It opens to divert flow to the tank when the preset pressure is reached, protecting the system from overpressure. Its two-stage design provides stable pressure control with minimal "override" (pressure overshoot).
Q2: What does the "200" in the model number mean, and how is the pressure adjusted?
A: The "200" indicates the maximum adjustable pressure setting for this valve, which is 200 bar. Pressure is set manually via an adjustment screw, which compresses the pilot spring. The screw typically includes a locking mechanism to prevent unintended changes after setting.
Q3: What are the key differences between the DB10 and DB20 series?
A: The main differences are typically in size, flow capacity, and connection ports.
-
Size/Port: The DB20 is generally a larger valve than the DB10. The DB20-1-5X/200 has G1/2" ports, whereas the previously discussed DB10-2-5X/315 has G1/4" ports.
-
Flow Capacity: The DB20 series is designed for higher flow rates (approx. up to 120 L/min for this variant) compared to the DB10 series.
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Max Pressure: The DB20-1-5X/200 is rated for a lower maximum pressure (200 bar) compared to the DB10-2-5X/315 (315 bar), reflecting different application focuses.
Q4: Where and how is this valve typically installed?
A: It is primarily installed in the main pressure line of a hydraulic system, usually directly after the pump, to protect the entire system. It can also be used in a branch circuit. Installation requires correct port alignment (P: pressure inlet, T: tank outlet) and a clean hydraulic system. The valve should be mounted in a stable, accessible location for adjustment and maintenance.
Q5: What are the main advantages of a pilot-operated (two-stage) relief valve like the DB20?
A: Compared to direct-acting valves, pilot-operated valves like the DB20 offer:
-
Precise Pressure Control: Very stable pressure setting with minimal pressure override (difference between cracking and full flow pressure).
-
High Flow Capacity: Can handle large flows in a relatively compact size.
-
Good Stability: Less prone to chatter or instability, especially at high flows.
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Lower Power Loss: The pilot stage handles only a small flow, reducing power loss during operation.
Q6: Where can I find the complete technical specifications and performance curves?
A: You must consult the official Rexroth technical datasheet for the exact model DB20-1-5X/200. This document provides critical data such as the pressure-flow characteristic curve, setting accuracy, hysteresis, internal leakage rates, dynamic response, and detailed installation dimensions.
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German
