Bosch Rexroth SEW series solenoid valve from Bosch Rexroth

The Bosch Rexchroth SEW series is a sturdy, durable, and reliable direct acting solenoid valve suitable for industrial hydraulic systems that require high pressure, low leakage, and precise control. Directional seat valves (direct operated, with solvent actuation) are valves used to control the start, stop, and direction of oil flow in hydraulic systems.

Bosch Rexroth SEW series solenoid valve from Bosch Rexroth

Bosch Rexroth SEW series solenoid valve from Bosch Rexroth

Brand:Bosch Rexroth

Series:SEW

Product NameDirect acting electromagnetic reversing seat valve

Bosch Rexroth SEW Model Analysis

This document describes Bosch Rexroth'sSEW seriesDirect acting electromagnetic directional seat valve. The complete order number consists of a series of codes, each representing a specific configuration of the valve. The structure of the order number is as follows:

[01] - [02] [03] [04] [05] / [06] / [07] [08] [09] / [10] [11] / [12] [13] / [14] / [15] / [16]

Here is a detailed explanation of each location code:

[01] Hydraulic Fluid Type

·MMineral oil

·Description: This is a standard configuration suitable for mineral oil-based hydraulic oils such as HL, HLP, HLPD, HVLP, HVLPD, etc.

[02] Number of Main Ports

·2: 2 main ports - corresponding2/2Open valve

·33 main ports - corresponding3/2Open valve

·4: 4 main ports - corresponding4/2Open valve

·Explanation: The 4/2-way valve is achieved by stacking a "Plus-1 plate" underneath the 3/2-way valve.

[03] Valve Type

·SEWSeat valve, direct operated

·Explanation: This is the core type identification of this series of valves.

[04] Specification (Size)

·6: Size 6

·Explanation: The installation dimensions of the valve comply with DIN 24340 Form A and ISO 4401-03-02-0-05 standards.

[05] Functional Symbols

This is the core code that defines the on/off relationship of the oil circuit when the valve is in the initial position (solenoid not energized) and working position (solenoid energized). The document provides various combinations.

·

Initial position symbol(Left column):

·

·TClose port P, connect port A to port T (Tank)

·NConnect P port to T port, close A port

·AConnect P port to A port and close T port

·aConnect P port to A port and close T port

·

Work position symbol(Right column):

·

·aConnect P port to A port and close T port

·bP port closed, A port connected to T port

·UP port closed, A port connected to T port

·CConnect P port to A port and close T port

·DUsed for 4/2-way valves, with P port connected to A port and B port connected to T port

·YUsed for 4/2-way valves, with P port connected to B port and A port connected to T port

·

Common combination examples:

·

·T a2/2 or 3/2-way valve, initial position P is closed, A is open, T is open, and working position P is open, A is closed.

·N b2/2 or 3/2-way valve, initial position P is open, T is closed, A is closed, and working position P is closed, T is open.

·U C3/2-way valve, initial position P is closed, A is open, T is open, and working position P is open, A is closed.

·D Y4/2-way valve (with Plus-1 board), initial position P through A, B through T; working position P through B, A through T.

[06] Component Series

·3XComponent Series 30 to 39 (30 to 39)

·Explanation: X represents any number from 0 to 9. This series ensures consistency in installation and connection dimensions.

[07] Operating Pressure

·420Maximum working pressure 420 bar (6100 psi)

·630Maximum working pressure 630 bar (9150 psi)

·Explanation: This is the maximum pressure that the valve can withstand, which is related to the strength and sealing of the valve body.

[08] Solenoid Type

·MHigh power (air gap) electromagnet with detachable coil

·Explanation: This is standard configuration, the coil can rotate 90 degrees, and replacing the coil does not require opening the pressure chamber.

[09] Voltage

Define the rated voltage of the electromagnetic coil.

·G24DC 24V

·G96: DC 96V

·G110DC 110V

·G205: DC 205V

·Attention:

·According to the table on page 2 of the document, when using an AC power source (such as 110V~or 230V~), it is necessary to control it through a rectifier, and the coil still uses the corresponding DC voltage code (such as G96, G205). Write the DC voltage code directly for the order number.

·For other voltages (such as 12V, 42V, 220V, etc.), please refer to page 7 of the document.

[10] Manual override device

·N9With Concealed Manual Override

·No codeWithout manual override

·Explanation: "N9" is a standard configuration that allows manual switching of valves when not powered.

[11] Electrical Connection

·K4: No plug (order separately); The connector complies with DIN EN 175301-803

·Instructions:

·K4 "indicates that the valve body does not come with a plug, and a matching plug needs to be ordered separately (see page 13).

·There are various types of plugs (no circuit, with indicator light, with rectifier, with Zener diode, etc.).

[12] Spool Position Monitoring

·No codeWithout position switch

·QMAG24Electric sensing position switch QM, monitoring spool position 'a', 24V (Monitored spool position 'a')

·QMBG24Electric sensing position switch QM, monitoring spool position 'b', 24V (Monitored spool position 'b')

·Attention:

·The position switch version is only applicable to valves with a pressure of 420 bar.

·Please refer to document 24830 for details.

[13] Inserts

Optional functional plugins for installation on the P port.

·No codeWithout check valve insert, without throttle insert

·PWith check valve insert

·functionAllow oil to flow freely from port P to port A, but prevent port A from flowing back to port P.

·B12Throttle hole diameter 1.2 mm

·B15Throttle hole diameter 1.5 mm

·B18Throttle hole diameter 1.8 mm

·B20Throttle hole diameter 2.0 mm

·B22Throttle hole diameter 2.2 mm

·functionLimit the maximum flow through the valve to prevent the valve core from being unable to switch or damaged due to excessive flow.

[14] Seal Material

·No codeNBR seals - rubber, suitable for mineral oil, water ethylene glycol, etc.

·VFKM seals - Fluororubber, resistant to high temperatures and chemical corrosion, suitable for special hydraulic oils such as esters and phosphates.

[15] Positioning Hole

·No codeWithout locating holes

·/62Equipped with locating holes and ISO 8752-3x8-St locking pins

·InstructionsEnsure that the valve is accurately positioned on the mounting plate.

[16] Other details

·No code or blank spaceUsed to fill in other special requirements not covered in the order number.