KSLH-6WYTO3Z

Fully Automatic SF₆ Gas Recovery, Vacuuming & Filling System

High-Pressure Liquefaction · Oil-Free Compressor · Automatic PLC Control · Regenerative Drying & Filtration

The KSLH-6WYTO3Z Fully Automatic SF₆ Gas Recovery, Vacuuming & Filling System is a mobile SF₆ gas handling unit designed for the recovery, high-pressure liquefaction, vacuum evacuation and refilling of SF₆ gas used in GIS, circuit breakers and other SF₆-insulated electrical equipment.

The system combines a 6 m³/h oil-free SF₆ compressor, high-pressure liquefaction technology, a 25 m³/h vacuum pump, regenerative drying and filtration, a 10-inch PLC touchscreen and an external weighing system into one integrated unit.

With fully automatic control, air-cooled operation and a mobile trolley design, KSLH-6WYTO3Z is suitable for both power equipment manufacturers and on-site SF₆ service and maintenance applications.

Key Features

Fully Automatic PLC Control

The KSLH-6WYTO3Z is equipped with a 10-inch PLC touchscreen for centralized control and monitoring.

The touchscreen displays the operating process and key parameters, helping operators manage SF₆ recovery, vacuum evacuation and filling operations with less manual intervention.

• 10-inch PLC touchscreen
• Automatic process control
• Real-time operating status display
• Parameter setting and monitoring
• Pressure display in mbar and bar

High-Pressure SF₆ Liquefaction

The system uses a high-pressure liquefaction design to recover SF₆ gas and liquefy it for efficient storage in an external cylinder.

The maximum discharge pressure of the oil-free SF₆ compressor reaches 50 bar, providing sufficient pressure for high-pressure SF₆ liquefaction.

SF₆ Gas → Compression → Filtration & Drying → High-Pressure Liquefaction → Storage Cylinder

Oil-Free SF₆ Compressor

The system uses a dedicated oil-free SF₆ compressor with a theoretical displacement of 6 m³/h and a maximum discharge pressure of 50 bar.

The oil-free compression design helps prevent lubricating oil from entering the SF₆ gas circuit during recovery.

This is particularly suitable for applications where maintaining the quality of recovered SF₆ gas is important.

Regenerative Drying & Filtration

An integrated drying and filtration system helps reduce moisture and particulate contamination during SF₆ gas recovery.

The drying filter uses vacuum heating activation regeneration, allowing the filter to be regenerated and reused.

The system is designed to achieve a recovered SF₆ moisture level of:

≤60 ppm/V

External Weighing System

The external weighing system provides a weighing range of 0–120 kg.

Operators can monitor cylinder weight directly through the touchscreen and use:

• Tare weighing
• Real-time weight display
• Automatic shutdown

This allows the operator to control the amount of SF₆ gas transferred during filling and helps prevent overfilling.

Deep Vacuum Evacuation

The system is equipped with a 25 m³/h vacuum pump with an ultimate vacuum of ≤1 mbar.

The vacuum system can be used to evacuate air and moisture from SF₆ equipment before gas filling.

The specified ultimate vacuum of the overall vacuum system can reach:

≤1 mbar

Air-Cooled & Mobile Design

KSLH-6WYTO3Z adopts an air-cooled design, eliminating the need for an external cooling-water source.

The mobile trolley structure is equipped with swivel and fixed wheels for convenient movement and positioning during field service.

This makes the system suitable for:

• Substation maintenance
• GIS servicing
• Circuit breaker maintenance
• Field SF₆ gas recovery
• Electrical equipment installation

What Is an SF₆ Gas Recovery System?

An SF₆ gas recovery system is specialized equipment used to safely recover, store and reuse sulfur hexafluoride (SF₆) gas from electrical equipment during maintenance, installation and servicing.

SF₆ is widely used as an insulating and arc-quenching medium in:

• Gas Insulated Switchgear (GIS)
• SF₆ circuit breakers
• Gas Insulated Lines (GIL)
• High-voltage electrical equipment
• Substation equipment

During maintenance, SF₆ gas should be recovered rather than released directly into the atmosphere.

A complete SF₆ gas handling system can perform several essential operations, including:

Recovery → Filtration & Drying → Liquefaction → Storage → Vacuum Evacuation → Refilling

The KSLH-6WYTO3Z integrates these core functions into one mobile system.

How KSLH-6WYTO3Z Works

1. SF₆ Gas Recovery

SF₆ gas is extracted from the electrical equipment and transferred to the recovery system.

The 6 m³/h oil-free SF₆ compressor compresses the recovered gas.

2. Drying & Filtration

During the recovery process, the gas passes through the integrated drying and filtration system.

The system helps remove:

• Moisture
• Solid particles

The regenerative drying filter can be activated through vacuum heating for repeated use.

3. High-Pressure Liquefaction

The compressed SF₆ gas is further pressurized for high-pressure liquefaction.

The liquefied SF₆ can then be transferred to an external storage cylinder.

4. Vacuum Evacuation

After maintenance or before refilling, the vacuum system evacuates air and residual gases from the electrical equipment.

The vacuum pump provides a pumping speed of:

25 m³/h

with an ultimate vacuum of:

≤1 mbar

5. SF₆ Gas Filling

After the equipment has been evacuated, SF₆ gas can be transferred from the storage cylinder into the electrical equipment.

The external weighing system continuously monitors the cylinder weight.

The automatic shutdown function can stop the filling process according to the preset operating conditions.

Technical Specifications

Main Component Specifications

Control & Monitoring

10-Inch PLC Touchscreen

The integrated 10-inch PLC touchscreen provides a centralized interface for operating and monitoring the SF₆ gas handling system.

Main Interface

The main interface provides an overview of the operating process and system status.

Settings Interface

The settings interface allows operators to configure operating parameters and control functions.

Operation Page

The operation page provides real-time information during SF₆ recovery, vacuum evacuation and filling.

Applications

GIS Maintenance

The KSLH-6WYTO3Z can be used for SF₆ gas recovery, vacuum evacuation and refilling during GIS inspection and maintenance.

SF₆ Circuit Breaker Servicing

The system supports SF₆ recovery and refilling operations during circuit breaker maintenance and servicing.

Substation Maintenance

The mobile air-cooled design makes the unit suitable for on-site SF₆ gas handling at substations.

Electrical Equipment Installation

The vacuum system can evacuate air and residual gases before SF₆ filling during installation and commissioning.

SF₆ Gas Storage & Recycling

Recovered SF₆ can be liquefied under high pressure and transferred to external cylinders for temporary storage and subsequent reuse.

KSLH-6WYTO3Z vs. DILO Piccolo L030R02

A Practical DILO Alternative for SF₆ Gas Handling

Looking for a DILO Piccolo L030R02 alternative?
The KSLH-6WYTO3Z provides a comparable integrated solution for SF₆ gas recovery, liquefaction, vacuum evacuation and filling, while offering a higher-capacity oil-free compressor and a larger 10-inch PLC touchscreen with fully automatic operation.

KSTONE provides flexible configurations for customers looking for an alternative to DILO SF₆ service carts, including customized compressor capacity, storage cylinder configuration, power supply and control functions.

Standard Accessories

DN8 SF₆ Filling Hose

• Length: 3 m
• Connection: G5/8
• One end designed for connection to the SF₆ cylinder

DN20 High-Pressure Hose

• Quantity: 2 pcs
• Length: 5 m each
• Equipped with DN20 self-sealing valves

Operating Manual

• English operating manual
• Chinese operating manual

Designed for On-Site SF₆ Service

The KSLH-6WYTO3Z combines the main functions required for SF₆ equipment servicing in one integrated mobile unit.

Recovery

Efficient recovery of SF₆ gas from electrical equipment.

Filtration & Drying

Reduction of moisture and particulate contamination during gas recovery.

Liquefaction

High-pressure liquefaction for efficient SF₆ storage.

Vacuuming

Deep vacuum evacuation before SF₆ refilling.

Filling

Controlled SF₆ filling with external cylinder weighing.

Why Choose KSTONE KSLH-6WYTO3Z?

01. Oil-Free SF₆ Compression

Helps minimize oil contamination in the SF₆ gas circuit.

02. High-Pressure Liquefaction

Enables efficient recovery and liquefaction of SF₆ gas for storage.

03. Regenerative Drying Filter

Vacuum-heating regeneration allows repeated use of the drying filter.

04. Fully Automatic Operation

PLC-based control simplifies SF₆ recovery, vacuuming and filling operations.

05. Integrated Weighing

0–120 kg external weighing system with tare and automatic shutdown functions.

06. Air-Cooled Design

No external cooling-water source is required.

07. Mobile Structure

Swivel and fixed wheels facilitate movement and positioning during field service.

08. Integrated SF₆ Service Functions

Recovery, drying & filtration, liquefaction, vacuum evacuation and filling are integrated into one system.

Typical SF₆ Service Workflow

01 — Connect

Connect the SF₆ equipment and storage cylinder to the system.

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02 — Recover

Recover SF₆ gas using the oil-free compressor.

↓

03 — Filter & Dry

Reduce moisture and particulate contamination.

↓

04 — Liquefy & Store

Liquefy recovered SF₆ under high pressure and transfer it to the storage cylinder.

↓

05 — Vacuum

Evacuate the electrical equipment before refilling.

↓

06 — Refill

Refill SF₆ gas while monitoring cylinder weight through the external weighing system.

Frequently Asked Questions

What is KSLH-6WYTO3Z used for?

KSLH-6WYTO3Z is a fully automatic SF₆ gas handling system designed for SF₆ gas recovery, high-pressure liquefaction, vacuum evacuation and refilling of GIS, circuit breakers and other SF₆-insulated electrical equipment.

Is the SF₆ compressor oil-free?

Yes. The system uses a dedicated 6 m³/h oil-free SF₆ compressor with a maximum discharge pressure of 50 bar.

Does the system require cooling water?

No. KSLH-6WYTO3Z uses an air-cooled design and does not require an external cooling-water source.

Can the system automatically stop filling?

Yes. The external 0–120 kg weighing system supports tare weighing and automatic shutdown.

What is the vacuum pump capacity?

The vacuum pump has a pumping speed of 25 m³/h and an ultimate vacuum of ≤1 mbar.

Can the drying filter be regenerated?

Yes. The drying filter uses vacuum heating activation regeneration, allowing repeated regeneration and use.

What gases can the system handle?

KSLH-6WYTO3Z is specifically designed for SF₆ gas handling applications.

Can the system be customized?

KSTONE provides customized SF₆ gas handling solutions according to equipment configuration, storage cylinder requirements, power supply and application conditions.

Request a Quote for KSLH-6WYTO3Z

Looking for a fully automatic SF₆ gas recovery system for GIS, circuit breaker or substation maintenance?

KSTONE can provide SF₆ gas recovery, vacuuming and filling equipment with customized configurations according to your application.

Contact KSTONE for technical specifications, quotation and customization options.