DBA25F2-2X/50

Manufacturer: Bosch Rexroth

Material #: R900973892

Model : DBA25F2-2X/50

Specifications

• Size 16 ' 32

• Component series 2X

• Maximum operating pressure 350 bar

• Maximum flow 400 l/min

• Weight: 4.7 KG

• Manufacturer: Bosch Rexroth

• 
  

• The Bosch Rexroth DBA25F2-2X/50 (R900973892) is a pump safety block designed to be directly mounted onto SAE pressure ports of pumps, providing a pilot-operated pressure relief function. It serves to limit the operating pressure of hydraulic systems by integrating a valve block and a pressure limitation screw-in cartridge valve, as outlined in the DB K data sheet. An optional addition for this unit is the HED pressure switch, which can be installed on the valve block for electrical circuit control. This model features input and output ports P and P, with a tank line port T established through the opening of the pressure limitation valve. The standard model includes a cover plate for connection diagram NG and utilizes a main control spool that responds to pressure changes between ports P and P. The design allows for equilibrium maintenance at set operating pressures, facilitated by an internal flow from channel P to T. Equipped with a pressure gauge connection G1/4, it allows monitoring of operating pressures. For different applications, this pump safety block offers various adjustment types including rotary knobs and sleeves with hexagon options for precise pressure settings. Its maximum operating pressure reaches up to 350 bar with a maximum flow rate of 50 l/min. Notably, this product ensures low noise levels due to its direct flange mounting at the pump, contributing to quieter operation environments. It also features zero-pressure startup and low circulation pressure due to its proximity to the pump, ensuring quick response times and efficient performance in managing hydraulic system pressures.

• Features

Zero-pressure start-up and circulation of the pump Intended for direct mounting onto the SAE pressure port of the pump Low circulation pressure due to short distance Low compression volume for soft switching to depressurized circulation Quick pressure build-up 4 adjustment types for pressure adjustment, optionally
• Rotary knob
• Sleeve with hexagon and protective cap
• Lockable rotary knob with scale
• Rotary knob with scale 5 pressure ratings, optional Low noise level due to direct flange mounting at the pump

Product Description

General

Pump safety blocks type DBA are pilot-operated pressure relief valves which are integrated into a block and intended to be mounted directly onto SAE pressure ports of pumps.

It is used for limiting (type DBA) the operating pressure.

Pump safety blocks generally consist of valve block (1) and pressure limitation screw-in cartridge valve type DB 20 K (2) (data sheet 25818). Optionally, a pressure switch type HED 8 (3) (data sheet 50061) can be installed on the valve block.

The valve housing is equipped with a port P for hydraulic fluid input and port P1 for hydraulic fluid output. In a branch of the through connection between these two ports, the pressure limitation screw-in cartridge valve can be found. By opening this valve, a connection to port T (tank line) is established.

At the standard model, connection diagram NG6 is covered with the cover plate (4). The pressure in the through connection (P - P1) has an effect on the main control spool (5) of the pressure limitation screw-in cartridge valve.

Via the nozzle bores (6 and 7), the pressure is at the same time applied to the poppet (8). If the pressure in port P exceeds the value set at spring (9), the poppet (8) opens against the spring (9).

Via the nozzle bores (6 and 7), the hydraulic fluid from channel P flows into the spring chamber (10) and is here internally directed via the control line (11) into the tank.

Due to the state of equilibrium at the main control spool (5), hydraulic fluid flows from channel P to channel T, maintaining the set operating pressure.

A pressure gauge connection (12) allows for the control of the operating pressure.

Pump safety block type DBA…D (with pressure switch)

The use of an electrical pressure switch type HED 8 (3) (data sheet 50061) enables activation and deactivation of an electric circuit via the control line (13).

In basic design, the control line (13) is closed with a plug screw (14).

The pressure gauge connection M and tank port T are illustrated with an offset of 90 °!