Single Overcentre Valve – VBCD Type A

Hydraulic Counterbalance / Overcentre Valve for Controlled Load Descent

Product Name

Single Overcentre Valve – VBCD Type A

Model Number / Series

VBCD SE A

The manufacturer identifies this series as VBCD SE A – Single Overcentre Valves, Type A. (Group Marchesini)

Brand

Oleodinamica Marchesini / OM Group

Product Category

Hydraulic Valves → Counterbalance Valves → Single Overcentre Valves

Product Details

The VBCD SE A Single Overcentre Valve – Type A is a hydraulic counterbalance valve designed to control actuator movement and block flow in one direction. It is used to provide controlled descent of suspended or overrunning loads and helps prevent actuator cavitation during load movement. (Group Marchesini)

The Type A configuration differs from other VBCD configurations in the connection positions and pilot ratio. (Group Marchesini)

This type of valve is suitable for hydraulic systems where controlled load movement, load holding and safe actuator operation are important.

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Description

The VBCD SE A Single Overcentre Valve is designed for hydraulic applications requiring controlled actuator movement and one-direction load blocking.

During lowering operations, an external load can cause an actuator to move faster than the hydraulic flow supplied by the system. The overcentre valve helps control this movement, preventing the load from running away and reducing the possibility of actuator cavitation. (Group Marchesini)

The valve is installed in-line within the hydraulic circuit. According to the manufacturer's assembly information, V1 and V2 are connected to the supply, C1 to the free-flow side of the actuator, and C2 to the actuator side where flow needs to be blocked. (Group Marchesini)

The VBCD Type A range is particularly relevant to hydraulic lifting, mobile machinery and industrial equipment where suspended loads must be controlled safely.

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Key Features

• Single overcentre valve configuration

• Type A connection arrangement

• Controls actuator movement in one direction

• Provides controlled descent of loads

• Helps prevent actuator cavitation

• Provides load-blocking functionality

• In-line installation

• Zinc-plated steel body

• Hardened and ground internal steel components

• BUNA-N standard seals

• Negligible leakage

• Non-standard pressure settings available on request

• Sealing-cap options available on request (Group Marchesini)

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Applications

The VBCD SE A can be used in hydraulic systems involving:

• Hydraulic lifting equipment

• Forklift and material-handling equipment

• Construction machinery

• Agricultural machinery

• Mobile hydraulic equipment

• Hydraulic cylinders

• Lifting arms

• Suspended-load applications

• Industrial machinery

• OEM hydraulic systems

• Hydraulic actuator load-control circuits

OM Group identifies counterbalance/overcentre valves for applications involving suspended loads such as forklifts, excavators and lifting arms, as well as lifting and construction applications. (Group Marchesini)

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Technical Specifications

The following information is based on the manufacturer's published information.

Specification	VBCD SE A
Valve Type	Single Overcentre Valve
Type	Type A
Product Code	VBCD SE A
Brand	Oleodinamica Marchesini / OM Group
Body	Zinc-plated steel
Internal Parts	Hardened and ground steel
Seal	BUNA N standard
Leakage	Negligible leakage
Installation	In-line
Pressure Setting	Standard setting 320 bar
Non-standard Setting	Available on request
Connection Arrangement	V1/V2 supply; C1 free-flow actuator side; C2 blocked-flow actuator side

The manufacturer's catalogue states a standard setting of 320 bar and specifies that valve setting should be at least 1.3 times the pressure induced by the load to allow the valve to close under maximum load conditions. (Group Marchesini)

Important: Port size, maximum flow and pilot ratio depend on the exact VBCD SE A variant. They should therefore be confirmed against the exact model/code before ordering.

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Available VBCD SE A Models

The manufacturer's VBCD SE A range lists the following related product codes and configurations: (Group Marchesini)

Manufacturer Code	Model
V0382	VBCD 1/4'' SE/A
V0392	VBCD 3/8'' SE/A
V0392/RP18	VBCD 3/8'' SE/A RP 1:8
V0412	VBCD 1/2'' SE/A
V0412/RP18	VBCD 1/2'' SE/A RP 1:8
V0419	VBCD 3/4'' SE/A
V0417	VBCD 1'' SE/A

These are the VBCD SE A variants identified in the manufacturer's published product range. (HydraBuy)

Important Model Selection Note

Do not select the valve based only on the nominal port size. The flow requirement, load pressure, pilot ratio, valve setting and hydraulic circuit configuration should be checked before ordering.

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How the VBCD Type A Works

The valve is designed to allow controlled actuator movement while preventing the load from overrunning the hydraulic actuator.

Basic hydraulic arrangement:

Supply → VBCD SE A → Hydraulic Actuator → Load

The manufacturer's recommended connection arrangement is:

• V1 / V2: Pressure supply

• C1: Free-flow side of actuator

• C2: Actuator side where flow is blocked

• Installation: In-line (Group Marchesini)

This configuration allows the valve to regulate movement when the load attempts to drive the actuator.

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Why Use an Overcentre Valve?

A hydraulic overcentre valve is commonly used when a machine needs to safely control an overrunning or suspended load.

For example, during the lowering of a hydraulic cylinder:

Without proper load control:
Load → actuator may accelerate → unstable movement / possible cavitation

With an overcentre valve:
Load → controlled hydraulic flow → controlled actuator movement

This makes overcentre valves particularly useful for lifting and load-handling applications.

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VBCD Type A vs Double Overcentre Valve

Feature	VBCD SE A	VBCD DE A
Valve Type	Single	Double
Load Control	One direction	Both directions
Typical Use	Single-direction load control	Bidirectional actuator load control
Series	VBCD SE A	VBCD DE A

The manufacturer describes the VBCD DE A as a double overcentre valve designed to block/control the actuator in both directions, while the VBCD SE A controls and blocks in one direction. (Group Marchesini)

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FAQ

What is a VBCD SE A valve?

The VBCD SE A is a Single Overcentre Valve – Type A designed to control actuator movement and block hydraulic flow in one direction.

What is a hydraulic overcentre valve used for?

It is used to control the movement of loads, particularly suspended or overrunning loads, and to provide controlled actuator descent.

What does Type A mean?

For the VBCD series, Type A refers to a particular configuration distinguished by its connection positions and pilot ratio. (Group Marchesini)

Can the VBCD SE A be used with a hydraulic cylinder?

Yes. The valve is designed for actuator load-control applications and can be used with hydraulic cylinders when the valve is correctly selected for the hydraulic circuit.

What is the standard setting?

The manufacturer's catalogue specifies a standard setting of 320 bar. (Group Marchesini)

What materials are used?

The valve has a zinc-plated steel body, hardened and ground steel internal components and standard BUNA-N seals. (Group Marchesini)

What is the difference between VBCD SE A and VBCD DE A?

VBCD SE A is a single overcentre valve for one-direction load control, whereas VBCD DE A is a double overcentre valve for controlling/blocking the actuator in both directions. (Group Marchesini)

How do I choose the correct VBCD model?

Check the required port size, flow rate, pilot ratio, operating pressure, load pressure and hydraulic circuit configuration. The exact manufacturer code should be confirmed before purchase.

Where can I buy VBCD Type A in Malaysia?

ASIA-MECH HYDRO-PNEUMATIC (M) SDN BHD supplies hydraulic valves and hydraulic components in Malaysia and can assist with VBCD Type A enquiries, model selection and availability.

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Related Models

• VBCD SE – Single Overcentre Valve

• VBCD DE A – Double Overcentre Valve Type A

• VBCD SE A CC – Single Overcentre Valve for Closed Centre, Type A

• VBCD SE A FLV – Single Overcentre Valve with Screw Fixing

• VBCD SE FL – Flangeable Single Overcentre Valve

• VBCD SE CETOP 3 – Single Overcentre Stackable CETOP 3 Valve (Group Marchesini)

Alternative Models

Depending on the hydraulic circuit, alternatives may include:

• Hydraulic Counterbalance Valve

• Double Overcentre Valve

• Pilot-Operated Check Valve

• Load-Holding Valve

• Flangeable Overcentre Valve

• CETOP Overcentre Valve

The correct alternative must be selected according to the hydraulic circuit and load requirements.

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SEO / GEO / AEO

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Suggested URL Slug

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Suggested WooCommerce Category

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Why Buy from ASIA-MECH HYDRO-PNEUMATIC?

ASIA-MECH HYDRO-PNEUMATIC (M) SDN BHD is a Malaysia-based supplier of hydraulic and pneumatic components serving industrial customers, OEM machine builders and hydraulic equipment users.

We supply hydraulic:

• Valves

• Pumps

• Motors

• Cylinders

• Filters

• Hydraulic accessories

• Pneumatic components

• Industrial automation components

We offer direct ordering for original, genuine and aftermarket brands, subject to product availability, with delivery options for Malaysia and international markets.

Contact Us

ASIA-MECH HYDRO-PNEUMATIC (M) SDN BHD

📞 Tel: 05-282 1518
📱 Mobile / WhatsApp: +60 16-550 2288
📧 Email: asiamech88@gmail.com

Malaysia Delivery: Perlis, Penang, Kedah, Perak, Pahang, Kuala Lumpur, Selangor, Melaka, Johor, Kelantan, Sabah and Sarawak.

International Delivery: Malaysia, Singapore, Thailand, Indonesia, Philippines, Vietnam, Europe and worldwide.

Datasheet / Catalog / PDF: Technical documentation can be provided or checked for the required VBCD configuration.

For customers looking for a VBCD SE A hydraulic overcentre valve in Malaysia, contact ASIA-MECH HYDRO-PNEUMATIC with the required port size, model number or application details so the correct configuration can be verified.

Official OM Group VBCD SE A product information (Group Marchesini)

SINGLE OVERCENTRE VALVE - VBCD TYPE A SUPPLY BY ASIA-MECH MALAYSIA PHILIPINES THAILAND INDONESIA