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商品の詳細:
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| 注文番号: | R900502117 | ブランド/モデル: | レックスロス DB20-1-5X/200 |
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| 重さ: | 3.2kg | 圧力ステージ: | パイロット操作の2段階設計。 |
| 最大。流量(およそ): | 最大120L/分 | ||
| ハイライト: | Rexroth hydraulic overflow valve,German Rexroth DB20 valve,Rexroth original overflow valve |
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Parameter |
Specification |
|---|---|
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Brand / Model |
Rexroth DB20-1-5X/200 |
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Order No. |
R900502117 |
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Product Type |
Pilot-Operated Pressure Relief / Overload Valve |
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Adjustment Type |
Manual screw adjustment with locking mechanism. |
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Port Size |
Connection: G1/2" (according to ISO 228). |
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Setting Pressure Range |
Maximum adjustable pressure setting is 200 bar. |
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Max. Flow Rate (approx.) |
Up to 120 L/min (depending on model variant; confirm with datasheet). |
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Pressure Stage |
Pilot-operated, 2-stage design. |
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Weight (approx.) |
~3.2 kg (confirm with datasheet for exact value). |
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Note |
Original German engineering. Designed for precise pressure limiting, system protection, and reduced pressure override. |
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.
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.
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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