Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd.
| Payment Terms | Western Union,D/P,T/T,D/A,L/C |
| Supply Ability | 100 |
| Delivery Time | 2 weeks |
| Packaging Details | wooden box |
| Structure | Piston Pump,Gear Pump,Single-stage Pump,Hydraulic Pumps |
| Pressure | High Pressure,Low Pressure,Other |
| Fuel | Diesel,hydraulic,oil,electric vacuum pump,Gasoline |
| Theory | Rotary Pump,Axial Flow Pump,Reciprocating Pump,Vacuum Pump,hydraulic pumps |
| Color | Black,Customer's Request,natural,Black or as you need,customize |
| Material | Cast Iron,Stainless Steel,Cast/Steel/Bronze/Ductile Iron and so on |
| Brand Name | Rexroth |
| Model Number | DB20-1-5X/315 |
| Certification | ISO |
| Place of Origin | Germany |
View Detail Information
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Product Specification
| Payment Terms | Western Union,D/P,T/T,D/A,L/C | Supply Ability | 100 |
| Delivery Time | 2 weeks | Packaging Details | wooden box |
| Structure | Piston Pump,Gear Pump,Single-stage Pump,Hydraulic Pumps | Pressure | High Pressure,Low Pressure,Other |
| Fuel | Diesel,hydraulic,oil,electric vacuum pump,Gasoline | Theory | Rotary Pump,Axial Flow Pump,Reciprocating Pump,Vacuum Pump,hydraulic pumps |
| Color | Black,Customer's Request,natural,Black or as you need,customize | Material | Cast Iron,Stainless Steel,Cast/Steel/Bronze/Ductile Iron and so on |
| Brand Name | Rexroth | Model Number | DB20-1-5X/315 |
| Certification | ISO | Place of Origin | Germany |
| High Light | Rexroth hydraulic overflow valve ，DB20-1-5X/315 overflow valve ，German imported hydraulic valve | ||
|
Parameter |
Specification |
|---|---|
|
Brand / Model |
Rexroth DB20-1-5X/315 |
|
Order No. |
R900587346 |
|
Product Type |
Pilot-Operated Pressure Relief / Overload Valve |
|
Adjustment Type |
Manual screw adjustment with locking feature. |
|
Port Size |
Connection: G1/2" (ISO 228). |
|
Setting Pressure Range |
Maximum adjustable pressure setting is 315 bar. |
|
Max. Flow Rate (approx.) |
Up to 120 L/min (subject to model confirmation via datasheet). |
|
Pressure Stage |
Two-stage, pilot-operated design. |
|
Note |
Original German manufacturing. Designed for precise system pressure limiting and overload protection. |
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FAQ:
Q1: What is the core function and design principle of the Rexroth DB20-1-5X/315 valve?
A: It is a two-stage, pilot-operated pressure relief valve. Its core purpose is to limit the maximum system pressure with high precision and stability. It functions as a critical safety device, opening to divert flow to the tank when the preset pressure is reached, thereby protecting pumps, actuators, and other components from damage due to overpressure. The pilot-operated design ensures minimal pressure override and stable operation even at high flows.
Q2: What is the key difference between the DB20-1-5X/315 and the DB20-1-5X/200?
A: The key difference is the maximum adjustable pressure setting, indicated by the suffix. The DB20-1-5X/315 has a maximum setting of 315 bar, while the DB20-1-5X/200 is limited to 200 bar. All other core specifications like port size (G1/2"), design, and approximate flow capacity are generally the same within the DB20-1-5X series. The choice depends on the required system pressure limit.
Q3: How is the pressure adjusted, and how is the setting maintained?
A: The pressure is adjusted manually via a calibrated adjustment screw. Turning the screw changes the compression of the pilot spring, which sets the cracking pressure. The valve typically includes a locking mechanism (such as a locknut) to secure the setting and prevent it from drifting due to vibration or accidental contact once the desired pressure is set.
Q4: In a hydraulic system, where should this valve be installed, and what is the correct port configuration?
A: It is typically installed in the main pressure line, directly after the pump, to protect the entire system. The correct port configuration is:
P (Pressure Port): Connected to the pressure line from the pump/system.
T (Tank Port): Connected directly to the hydraulic tank (reservoir).
Control Line (X, if present): For remote control or drain; consult the specific schematic for the DB20-1-5X/315.
Q5: What are the main advantages of using a pilot-operated relief valve like the DB20 series over a direct-acting type?
A: The primary advantages are:
High Accuracy & Low Override: Maintains a nearly constant pressure over a wide flow range with minimal difference between cracking and full-flow pressure.
High Flow Capacity: Can handle large flows (e.g., ~120 L/min) in a relatively compact size.
Stable Operation: Less prone to chatter, instability, or pressure spikes, especially at high flows.
Energy Efficiency: Reduced pressure override means lower power loss and heat generation in the system compared to some direct-acting valves.
Company Details
Business Type:
Manufacturer,Exporter
Total Annual:
1 million-10 millon
Employee Number:
>50
Ecer Certification：
Verified Supplier
Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd. has been established for many years and has now developed into an international trading company supplying various hydraulic machinery parts, oil pumps and valves. We are one of the few Chinese companies with multiple products and cha... Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd. has been established for many years and has now developed into an international trading company supplying various hydraulic machinery parts, oil pumps and valves. We are one of the few Chinese companies with multiple products and cha...
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