VB Hydraulic Brake Valves

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  • Topic: Vehicle braking technologies, Pressure sensor, Pressure
  • Pages : 120 (16508 words )
  • Download(s) : 421
  • Published : August 9, 2012
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VB
BRAKE VALVES

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VB Brake valves

POCLAIN HYDRAULICS

HYDRAULIC BRAKE SYSTEM
Tank Pump Auxiliaries

Accumulators
store energy for power off braking.

Emergency / Parking brake valve
controls the SAHR brake to provide emergency and parking brake functions.

Accumulator charging valve
ensures the pressure is available in the accumulator(s) to operate the brake(s).

SAHR (Spring Applied, Hydraulics Release brake)

FRONT

REAR

HASR
(Hydraulic Applied Spring Release)

Service braking valve
provides HASR brake control to provide dynamic brake functions.

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POCLAIN HYDRAULICS

VB Brake Valves

CONTENTS
Hydraulic

Valves

Page

VB-002 .......5 VB-00E .......11

Emergency / Parking brake valves
Electrohydraulic

Single circuit

VB-010 .......15 VB-020 .......19

Service brake valves
Dual circuit

Single circuit

VB-012 .......23 VB-022 .......27

Service brake valves + inching

Dual circuit

Steering assist brake valves

VB-0B0 .......31

45 L/min Single circuit 120 L/min

VB-100 .......35 VB-100 .......39 VB-200 .......43 VB-200 .......47

Accumulator charging valves
45 L/min Dual circuit 120 L/min

45 L/min Single circuit • Service brake • Accumulator charging 120 L/min

VB-110 .......51 VB-110 .......55 VB-220 .......59 VB-220 .......63

Full power brake valves
• Service brake • Accumulator charging

45 L/min

120 L/min Dual circuit • Parking brake • Service brake • Accumulator charging 45 L/min

VB-22E .......67

OPTIONS......................................................................................................................................................................71 INSTALLATION............................................................................................................................................................73

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VB-002

POCLAIN HYDRAULICS

Methodology : This document is intended for manufacturers of machines that incorporate Poclain Hydraulics products. It describes the technical characteristics of Poclain Hydraulics products and specifies installation conditions that will ensure optimum operation. This document includes important comments concerning safety. They are indicated in the following way: Safety comment. This document also includes essential operating instructions for the product and general information. These are indicated in the following way: Essential instructions.

General information .

Information on the model code.

Weight of component without oil.

Volume of oil.

Units.

Tightening torque.

Screws.

Information intended for Poclain-Hydraulics personnel.

The views in this document are created using metric standards. The dimensional data is given in mm and in inches (inches are between brackets and italic)

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VB-002

VB-002
• Hydraulic • Single-circuit

Horizontal lever

Inching

Vertical lever

Lockable pedal

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Installation

Applications The VB-002 reverse modulator is a mechanically-controlled, three-way, graduated release pressure reducing valve. The VB-002 valve is used for the precision dosing of the output pressure (at X) proportionally to the control stroke. It is controlled via a lever or pedal. The lever is usually used to control the parking brake (spring applied hydraulic release brake).The pedal is usually used for inching control.

Operation When the control is idle, the output pressure (at X) is limited to the preset pressure of the valve, irrespective of the supply pressure. When the lever or pedal is activated, the output pressure (at X) falls in proportion to the angular position of the control. •Lever control: When the lever is in its maximum position (locked), the output pressure (at X) is zero. The control lever can be unlocked using the...
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