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Allen-threaded plug VSTI BSP 3/8" ED seal

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Manufacturer: HYDRON hydraulika siłowa (go to products)

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Allen-threaded plug VSTI BSP 3/8" ED

The VSTI BSP 3/8" ED Allen-threaded plug is a steel hydraulic blanking plug designed for closing compatible ports with a BSP internal thread. The product features an external BSP 3/8" cylindrical thread, a hexagon socket for an Allen key, and an ED elastomeric seal. The design allows for closing a properly prepared hydraulic connection without the need for an additional fitting.

The VSTI BSP 3/8" ED plug is made of free-cutting steel protected by zinc plating with white passivation. The working pressure specified for the product is 400 bar, while the operating temperature range covers -20°C to +120°C. The blanking plug can be used in power hydraulic systems where closing a port with the appropriate BSP thread and a surface adapted for ED sealing is required.

Technical parameters of the VSTI BSP 3/8" ED plug

Product type: hydraulic plug, threaded blanking plug.
Construction type: VSTI.
Thread size: BSP 3/8".
Thread type: external, cylindrical BSP.
Seal type: ED elastomeric.
Mounting method: hexagon socket for Allen key.
Working pressure: 400 bar.
Operating temperature: from -20°C to +120°C.
Material: free-cutting steel.
Surface protection: zinc plated with white passivation.
Product symbol: 4BN-06WD.
Designation according to Parker Ermeto: VSTI3/8ED.
Designation according to Cast: 107603.
Designation according to Vitillo: ATMG06ELX.
Purpose: blanking compatible ports with a BSP internal thread.

Application of the VSTI BSP 3/8" plug in power hydraulics

The VSTI BSP 3/8" plug with an ED seal is used to close appropriately matched threaded connections in hydraulic systems. It can be used during equipment assembly, component replacement, maintenance work, and blanking unused technological and connection ports.

Potential application sites include hydraulic directional control valve bodies, pumps, cylinders, and other system components equipped with a compatible BSP port. Before installation, confirm the compatibility of the port design, thread type, and sealing method.

External BSP 3/8" cylindrical thread

The blanking plug features an external BSP 3/8" cylindrical thread. It is designed to work with a matching internal thread and a surface that allows the ED seal to function correctly.

When identifying the connection, distinguish the cylindrical BSP thread from the tapered BSPT thread. A matching nominal size alone does not mean the components can be safely connected. The geometry of the port and the method of achieving tightness are also essential.

ED seal – design and principle of operation

The VSTI BSP 3/8" plug is equipped with an ED-type seal. This is a solution using an elastomeric element that works with a properly prepared contact surface of the hydraulic connection.

In contrast to connections that require sealing on the thread itself, the ED seal plays an important role in this version. Before installation, check its condition, proper seating, and the cleanliness of the mating surfaces. A damaged seal or incorrect port geometry can cause leaks.

Working pressure 400 bar

A working pressure of 400 bar is specified for the VSTI BSP 3/8" ED threaded plug. This parameter is important when selecting a blanking plug for a hydraulic system, especially for connections that remain under pressure during equipment operation.

Before use, also consider the permissible parameters of the port, the mating body, and other parts of the system. The maximum pressure of the complete connection should not exceed the value allowed for its weakest element.

Operating temperature from -20°C to +120°C

The operating temperature range specified for the plug is -20°C to +120°C. When selecting the product, pay attention to the temperature of the hydraulic medium and the operating conditions of the entire connection.

The compatibility of the elastomeric seal with the working medium is of particular importance. Before use in unusual conditions, confirm the suitability of the seal material for the specific installation.

Free-cutting steel and zinc plating with white passivation

The VSTI BSP 3/8" ED plug is made of free-cutting steel. The product's surface is protected by zinc plating with white passivation, which serves as a protective function and limits the susceptibility of the steel element to corrosion.

When choosing a blanking plug, consider the device's operating environment, material requirements, and surface resistance. Proper selection covers both the plug itself and the mating connection.

Socket for Allen key – plug installation

The design of the VSTI plug includes an internal hexagon socket designed for use with an Allen key. It allows for tightening and loosening the blanking plug without having to grip its external surface with a flat wrench.

This solution is particularly useful in places where access to the port is limited. During installation, use a key properly fitted to the socket and follow the requirements for tightening that specific connection.

Catalog designations for Parker Ermeto, Cast, and Vitillo

When identifying the VSTI BSP 3/8" ED threaded plug, catalog designations from hydraulic component manufacturers are helpful. The HYDRON product sheet lists Parker Ermeto VSTI3/8ED, Cast 107603, and Vitillo ATMG06ELX. The product symbol is 4BN-06WD.

These designations can facilitate the search for appropriate elements in documentation and when ordering parts. Before using the product as a replacement, confirm the compatibility of the thread, design, sealing, and operating parameters in the relevant manufacturer's catalog.

Catalog designation table for the BSP 3/8" ED plug

Manufacturer or designation	Catalog number
Parker Ermeto	VSTI3/8ED
Cast	107603
Vitillo	ATMG06ELX
Product symbol	4BN-06WD

How to choose a VSTI BSP 3/8" ED plug?

The basis for selection is confirming the compatibility of the external BSP 3/8" thread with the internal thread of the port being blanked. It should also be checked whether the connection is adapted for an ED seal and has an appropriate contact surface.

Operating parameters are also important: working pressure of 400 bar and temperature from -20°C to +120°C. When replacing a previously used plug, it is worth comparing the design, size, catalog designation, and type of seal.

Installation and leak check of the VSTI blanking plug

Before installation, turn off the device and safely depressurize the hydraulic system. Then clean the thread, inspect the condition of the ED seal, and check the contact surface in the body.

The plug should be screwed into the appropriately matched hole and tightened with the correct Allen key according to the technical requirements of the connection. After installation is complete, check for proper mounting and tightness under safe conditions.

Technical specification

Parameter	Value
Product name	Allen-threaded plug VSTI BSP 3/8" ED
Construction type	VSTI
Thread	External BSP 3/8" cylindrical
Sealing	ED elastomeric
Working pressure	400 bar
Operating temperature	From -20°C to +120°C
Material	Free-cutting steel
Surface protection	Zinc plated with white passivation
Socket	Hexagon for Allen key
Product symbol	4BN-06WD
Parker Ermeto	VSTI3/8ED
Cast	107603
Vitillo	ATMG06ELX

Frequently Asked Questions (FAQ)

What thread does the VSTI BSP 3/8" ED plug have?

The plug has an external cylindrical BSP 3/8" thread, designed for closing compatible ports with an internal thread.

What is the working pressure of the VSTI 3/8" plug?

The working pressure specified for this variant is 400 bar. The permissible parameters of other connection elements should also be considered.

What does ED sealing mean?

ED is an elastomeric seal designed to work with a properly prepared surface of a hydraulic connection.

What wrench is used to install the VSTI plug?

The plug features a hexagon socket for an Allen key. The tool should be matched to the actual size of the socket.

What material is the plug made of?

The product is made of free-cutting steel protected by zinc plating with white passivation.

What are the Parker Ermeto, Cast, and Vitillo designations?

The HYDRON product sheet lists Parker Ermeto VSTI3/8ED, Cast 107603, and Vitillo ATMG06ELX. The product symbol is 4BN-06WD. Catalog compatibility of the replacement should be confirmed before use.